pike.git/src/operators.c:9f42db355d147927f235bf42299344c619e3ced7

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6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ #include "global.h" #include "interpret.h" #include "svalue.h" #include "multiset.h" #include "mapping.h" #include "array.h" #include "stralloc.h" #include "pike_float.h" #include "opcodes.h" #include "operators.h" #include "pike_memory.h" #include "pike_error.h" #include "docode.h" #include "constants.h" #include "peep.h" #include "lex.h" #include "program.h" #include "object.h" #include "pike_types.h" #include "module_support.h" #include "pike_macros.h" #include "bignum.h" #include "builtin_functions.h" #include "cyclic.h" #include "pike_compiler.h" #define OP_DIVISION_BY_ZERO_ERROR(FUNC) \ math_error(FUNC, 2, 0, "Division by zero.\n") #define OP_MODULO_BY_ZERO_ERROR(FUNC) \ math_error(FUNC, 2, 0, "Modulo by zero.\n") /* This calculation should always give some margin based on the size. */ /* It utilizes that log10(256) ~= 2.4 < 5/2. */ /* One extra char for the sign and one for the \0 terminator. */ #define MAX_INT_SPRINTF_LEN (2 + (SIZEOF_INT_TYPE * 5 + 1) / 2) /* Enough to hold a Pike float or int in textform */ #define MAX_NUM_BUF (MAXIMUM(MAX_INT_SPRINTF_LEN,MAX_FLOAT_SPRINTF_LEN)) static int has_lfun(enum LFUN lfun, int arg); static int call_lfun(enum LFUN left, enum LFUN right); static int call_lhs_lfun(enum LFUN lfun, int arg); void index_no_free(struct svalue *to,struct svalue *what,struct svalue *ind) { switch(TYPEOF(*what)) { case T_ARRAY: simple_array_index_no_free(to,what->u.array,ind); break; case T_MAPPING: mapping_index_no_free(to,what->u.mapping,ind); break; case T_OBJECT: object_index_no_free(to, what->u.object, SUBTYPEOF(*what), ind); break; case T_MULTISET: { int i=multiset_member(what->u.multiset, ind); SET_SVAL(*to, T_INT, i ? NUMBER_NUMBER : NUMBER_UNDEFINED, integer, i); break; } case T_STRING: if(TYPEOF(*ind) == T_INT) { ptrdiff_t len = what->u.string->len; INT_TYPE p = ind->u.integer; INT_TYPE i = p < 0 ? p + len : p; if(i<0 || i>=len) { if(len == 0) Pike_error("Attempt to index the empty string with %"PRINTPIKEINT"d.\n", i); else Pike_error("Index %"PRINTPIKEINT"d is out of string range " "%"PRINTPTRDIFFT"d..%"PRINTPTRDIFFT"d.\n", i, -len, len - 1); } else i=index_shared_string(what->u.string,i); SET_SVAL(*to, T_INT, NUMBER_NUMBER, integer, i); break; }else{ if (TYPEOF(*ind) == T_STRING) Pike_error ("Expected integer as string index, got \"%S\".\n", ind->u.string); else Pike_error ("Expected integer as string index, got %s.\n", get_name_of_type (TYPEOF(*ind))); } case T_FUNCTION: case T_PROGRAM: if (program_index_no_free(to, what, ind)) break; goto index_error; case T_INT: if (TYPEOF(*ind) == T_STRING && !IS_UNDEFINED (what)) { INT_TYPE val = what->u.integer; convert_svalue_to_bignum(what); index_no_free(to, what, ind); if(IS_UNDEFINED(to)) { if (val) { Pike_error("Indexing the integer %"PRINTPIKEINT"d " "with unknown method \"%S\".\n", val, ind->u.string); } else { Pike_error("Indexing the NULL value with \"%S\".\n", ind->u.string); } } break; } /* FALLTHRU */ default: index_error: if (TYPEOF(*ind) == T_INT) Pike_error ("Cannot index %s with %"PRINTPIKEINT"d.\n", (TYPEOF(*what) == T_INT && !what->u.integer)? "the NULL value":get_name_of_type(TYPEOF(*what)), ind->u.integer); else if (TYPEOF(*ind) == T_FLOAT) Pike_error ("Cannot index %s with %"PRINTPIKEFLOAT"e.\n", (TYPEOF(*what) == T_INT && !what->u.integer)? "the NULL value":get_name_of_type(TYPEOF(*what)), ind->u.float_number); else if (TYPEOF(*ind) == T_STRING) Pike_error ("Cannot index %s with \"%S\".\n", (TYPEOF(*what) == T_INT && !what->u.integer)? "the NULL value":get_name_of_type(TYPEOF(*what)), ind->u.string); else Pike_error ("Cannot index %s with %s.\n", (TYPEOF(*what) == T_INT && !what->u.integer)? "the NULL value":get_name_of_type(TYPEOF(*what)), get_name_of_type (TYPEOF(*ind))); } } PMOD_EXPORT void o_index(void) { struct svalue s; index_no_free(&s,Pike_sp-2,Pike_sp-1); pop_n_elems(2); *Pike_sp=s; dmalloc_touch_svalue(Pike_sp); Pike_sp++; dmalloc_touch_svalue(Pike_sp-1); } /*! @class MasterObject */ /*! @decl object cast_to_object(string str, string|void current_file) *! *! Called by the Pike runtime to cast strings to objects. *! *! @param str *! String to cast to object. *! *! @param current_file *! Filename of the file that attempts to perform the cast. *! *! @returns *! Returns the resulting object. *! *! @seealso *! @[cast_to_program()] */ /*! @decl program cast_to_program(string str, string|void current_file) *! *! Called by the Pike runtime to cast strings to programs. *! *! @param str *! String to cast to object. *! *! @param current_file *! Filename of the file that attempts to perform the cast. *! *! @returns *! Returns the resulting program. *! *! @seealso *! @[cast_to_object()] */ /*! @endclass */ /* Special case for casting to int. */ PMOD_EXPORT void o_cast_to_int(void) { switch(TYPEOF(Pike_sp[-1])) { case T_OBJECT: if(!Pike_sp[-1].u.object->prog) { /* Casting a destructed object should be like casting a zero. */ pop_stack(); push_int (0); } else { if( Pike_sp[-1].u.object->prog == bignum_program ) return; ref_push_string(literal_int_string); if(!call_lhs_lfun(LFUN_CAST,2)) Pike_error("No cast method in object <2>.\n"); stack_pop_keep_top(); /* pop object. */ if(TYPEOF(Pike_sp[-1]) != PIKE_T_INT) { if(TYPEOF(Pike_sp[-1]) == T_OBJECT) { struct object *o = Pike_sp[-1].u.object; if( o->prog == bignum_program ) return; else if( o->prog ) { ref_push_string(literal_int_string); if( call_lhs_lfun(LFUN__IS_TYPE,2) ) if( !UNSAFE_IS_ZERO(Pike_sp-1) ) { pop_stack(); return; } pop_stack(); } } Pike_error("Cast failed, wanted int, got %s\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } else if(SUBTYPEOF(Pike_sp[-1]) == NUMBER_UNDEFINED) Pike_error("Cannot cast this object to int.\n"); } break; case T_FLOAT: { FLOAT_TYPE f = Pike_sp[-1].u.float_number; if ( PIKE_ISINF(f) || PIKE_ISNAN(f) ) Pike_error("Can't cast infinites or NaN to int.\n"); /* should perhaps convert to Int.Inf now that we have them? */ if (UNLIKELY(f > MAX_INT_TYPE || f < MIN_INT_TYPE)) { convert_stack_top_to_bignum(); } else { SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, f); } break; } case T_STRING: /* The generic function is rather slow, so I added this * code for benchmark purposes. :-) /per */ if( (Pike_sp[-1].u.string->len >= 10) || Pike_sp[-1].u.string->size_shift ) convert_stack_top_string_to_inumber(10); else { INT_TYPE i = strtol(Pike_sp[-1].u.string->str, 0, 10); free_string(Pike_sp[-1].u.string); SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, i); } break; case PIKE_T_INT: break; default: Pike_error("Cannot cast %s to int.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); break; } } /* Special case for casting to string. */ PMOD_EXPORT void o_cast_to_string(void) { struct pike_string *s; switch(TYPEOF(Pike_sp[-1])) { case T_OBJECT: if(!Pike_sp[-1].u.object->prog) { /* Casting a destructed object should be like casting a zero. */ pop_stack(); push_constant_text("0"); } else { ref_push_string(literal_string_string); if(!call_lhs_lfun(LFUN_CAST,2)) Pike_error("No cast method in object.\n"); stack_pop_keep_top(); if(TYPEOF(Pike_sp[-1]) != PIKE_T_STRING) { if(TYPEOF(Pike_sp[-1])==PIKE_T_INT && SUBTYPEOF(Pike_sp[-1])==NUMBER_UNDEFINED) Pike_error("Cannot cast this object to string.\n"); if(TYPEOF(Pike_sp[-1]) == T_OBJECT && Pike_sp[-1].u.object->prog) { ref_push_string(literal_string_string); if( call_lhs_lfun( LFUN__IS_TYPE,2 ) ) if( !UNSAFE_IS_ZERO(Pike_sp-1) ) { pop_stack(); return; } pop_stack(); } Pike_error("Cast failed, wanted string, got %s\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } } return; case T_ARRAY: { int i, alen; struct array *a = Pike_sp[-1].u.array; int shift = 0; alen = a->size; for(i = 0; i<alen; i++) { INT_TYPE val; if (TYPEOF(a->item[i]) != T_INT) { Pike_error( "Can only cast array(int) to string, item %d is not an integer: %O\n", i, a->item + i); } val = a->item[i].u.integer; switch (shift) { /* Trust the compiler to strength reduce this. */ case 0: if ((unsigned INT32) val <= 0xff) break; shift = 1; /* FALLTHRU */ case 1: if ((unsigned INT32) val <= 0xffff) break; shift = 2; /* FALLTHRU */ case 2: #if SIZEOF_INT_TYPE > 4 if (val < MIN_INT32 || val > MAX_INT32) Pike_error ("Item %d is too large: %"PRINTPIKEINT"x.\n", i, val); #endif break; } } s = begin_wide_shared_string(a->size, shift); switch(shift) { case 0: for(i = a->size; i--; ) { s->str[i] = (p_wchar0) a->item[i].u.integer; } break; case 1: { p_wchar1 *str1 = STR1(s); for(i = a->size; i--; ) { str1[i] = (p_wchar1) a->item[i].u.integer; } } break; case 2: { p_wchar2 *str2 = STR2(s); for(i = a->size; i--; ) { str2[i] = (p_wchar2) a->item[i].u.integer; } } break; } pop_stack(); push_string(end_shared_string(s)); } return; default: Pike_error("Cannot cast %s to string.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); break; case PIKE_T_STRING: return; case T_FLOAT: { char buf[MAX_FLOAT_SPRINTF_LEN+1]; format_pike_float (buf, Pike_sp[-1].u.float_number); s = make_shared_string(buf); break; } case T_INT: { INT_TYPE org; char buf[MAX_INT_SPRINTF_LEN]; char *b = buf+sizeof buf-1; unsigned INT_TYPE i; org = Pike_sp[-1].u.integer; *b-- = '\0'; i = org; if( org < 0 ) i = -i; goto jin; /* C as a macro assembler :-) */ do { i /= 10; jin: *b-- = '0'+(i%10); } while( i >= 10 ); if( org < 0 ) *b = '-'; else b++; s = make_shared_string(b); } break; } SET_SVAL(Pike_sp[-1], PIKE_T_STRING, 0, string, s); } PMOD_EXPORT void o_cast(struct pike_type *type, INT32 run_time_type) { if(run_time_type != TYPEOF(Pike_sp[-1])) { if(run_time_type == T_MIXED) return; if (TYPEOF(Pike_sp[-1]) == T_OBJECT && !Pike_sp[-1].u.object->prog) { /* Casting a destructed object should be like casting a zero. */ pop_stack(); push_int (0); } if(TYPEOF(Pike_sp[-1]) == T_OBJECT) { struct object *o = Pike_sp[-1].u.object; int f = FIND_LFUN(o->prog->inherits[SUBTYPEOF(Pike_sp[-1])].prog, LFUN_CAST); if(f == -1) { if (run_time_type == T_MAPPING) { stack_dup(); f_indices(1); stack_swap(); f_values(1); f_mkmapping(2); goto emulated_type_ok; } if (run_time_type != T_PROGRAM) { Pike_error("No cast method in object.\n"); } f_object_program(1); return; } push_static_text(get_name_of_type(type->type)); apply_low(o, f, 1); if (run_time_type == T_PROGRAM) { if (IS_UNDEFINED(Pike_sp-1)) { pop_stack(); f_object_program(1); return; } } stack_pop_keep_top(); if(TYPEOF(Pike_sp[-1]) == T_INT && SUBTYPEOF(Pike_sp[-1]) == NUMBER_UNDEFINED) Pike_error("Cannot cast this object to %s.\n", get_name_of_type(type->type)); } else switch(run_time_type) { default: Pike_error("Cannot perform cast to that type.\n"); break; case T_MULTISET: switch(TYPEOF(Pike_sp[-1])) { case T_ARRAY: { f_mkmultiset(1); break; } default: Pike_error("Cannot cast %s to multiset.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } break; case T_MAPPING: switch(TYPEOF(Pike_sp[-1])) { case T_ARRAY: { struct array *a=Pike_sp[-1].u.array; struct array *b; struct mapping *m; INT32 i; m=allocate_mapping(a->size); /* MAP_SLOTS(a->size) */ push_mapping(m); for (i=0; i<a->size; i++) { if (TYPEOF(ITEM(a)[i]) != T_ARRAY) Pike_error("Cast array to mapping: " "element %d is not an array\n", i); b=ITEM(a)[i].u.array; if (b->size!=2) Pike_error("Cast array to mapping: " "element %d is not an array of size 2\n", i); mapping_insert(m,ITEM(b)+0,ITEM(b)+1); } stack_swap(); pop_n_elems(1); break; } default: Pike_error("Cannot cast %s to mapping.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } break; case T_ARRAY: switch(TYPEOF(Pike_sp[-1])) { case T_MAPPING: { struct array *a=mapping_to_array(Pike_sp[-1].u.mapping); pop_stack(); push_array(a); break; } case T_STRING: f_values(1); break; case T_MULTISET: f_indices(1); break; default: Pike_error("Cannot cast %s to array.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } break; case T_INT: o_cast_to_int(); return; case T_STRING: o_cast_to_string(); return; case T_FLOAT: { FLOAT_TYPE f = 0.0; switch(TYPEOF(Pike_sp[-1])) { case T_INT: f=(FLOAT_TYPE)(Pike_sp[-1].u.integer); break; case T_STRING: #if SIZEOF_FLOAT_TYPE > SIZEOF_DOUBLE f = (FLOAT_TYPE)STRTOLD_PCHARP(MKPCHARP(Pike_sp[-1].u.string->str, Pike_sp[-1].u.string->size_shift), 0); #else f = (FLOAT_TYPE)STRTOD_PCHARP(MKPCHARP(Pike_sp[-1].u.string->str, Pike_sp[-1].u.string->size_shift), 0); #endif free_string(Pike_sp[-1].u.string); break; default: Pike_error("Cannot cast %s to float.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } SET_SVAL(Pike_sp[-1], T_FLOAT, 0, float_number, f); break; } case T_OBJECT: { struct program *p = program_from_type(type); if (p) { struct svalue s; SET_SVAL(s, T_PROGRAM, 0, program, p); apply_svalue(&s, 1); return; } } switch(TYPEOF(Pike_sp[-1])) { case T_STRING: { struct pike_string *file; INT_TYPE lineno; if(Pike_fp->pc && (file = low_get_line(Pike_fp->pc, Pike_fp->context->prog, &lineno, NULL))) { push_string(file); }else{ push_int(0); } /* FIXME: Ought to allow compile_handler to override. */ APPLY_MASTER("cast_to_object",2); return; } case T_FUNCTION: if (SUBTYPEOF(Pike_sp[-1]) == FUNCTION_BUILTIN) { Pike_error("Cannot cast builtin functions to object.\n"); } else if (Pike_sp[-1].u.object->prog == pike_trampoline_program) { ref_push_object(((struct pike_trampoline *) (Pike_sp[-1].u.object->storage))-> frame->current_object); stack_pop_keep_top(); } else { SET_SVAL_TYPE(Pike_sp[-1], T_OBJECT); SET_SVAL_SUBTYPE(Pike_sp[-1], 0); } break; default: Pike_error("Cannot cast %s to object.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } break; case T_PROGRAM: switch(TYPEOF(Pike_sp[-1])) { case T_STRING: { struct pike_string *file; INT_TYPE lineno; if(Pike_fp->pc && (file = low_get_line(Pike_fp->pc, Pike_fp->context->prog, &lineno, NULL))) { push_string(file); }else{ push_int(0); } /* FIXME: Ought to allow compile_handler to override. */ APPLY_MASTER("cast_to_program",2); return; } case T_FUNCTION: { struct program *p=program_from_function(Pike_sp-1); if(p) { add_ref(p); pop_stack(); push_program(p); }else{ pop_stack(); push_int(0); } } return; case PIKE_T_TYPE: { struct pike_type *t = Pike_sp[-1].u.type; struct program *p = program_from_type(t); pop_stack(); if (p) { ref_push_program(p); } else { push_int(0); } return; } default: Pike_error("Cannot cast %s to a program.\n", get_name_of_type(TYPEOF(Pike_sp[-1]))); } } } if(run_time_type != TYPEOF(Pike_sp[-1])) { switch(TYPEOF(Pike_sp[-1])) { case T_OBJECT: if(Pike_sp[-1].u.object->prog) { struct object *o = Pike_sp[-1].u.object; int f = FIND_LFUN(o->prog->inherits[SUBTYPEOF(Pike_sp[-1])].prog, LFUN__IS_TYPE); if( f != -1) { push_static_text(get_name_of_type(run_time_type)); apply_low(o, f, 1); f=!UNSAFE_IS_ZERO(Pike_sp-1); pop_stack(); if(f) goto emulated_type_ok; } } break; case T_FUNCTION: /* Check that the function actually is a program. */ if ((run_time_type == T_PROGRAM) && program_from_function(Pike_sp-1)) { return; /* No need for further post-processing. */ } break; } Pike_error("Cast failed, wanted %s, got %s\n", get_name_of_type(run_time_type), get_name_of_type(TYPEOF(Pike_sp[-1]))); } emulated_type_ok: if (!type) return; switch(run_time_type) { case T_ARRAY: { struct pike_type *itype; INT32 run_time_itype; push_type_value(itype = index_type(type, int_type_string, 0)); run_time_itype = compile_type_to_runtime_type(itype); if(run_time_itype != T_MIXED) { struct array *a; struct array *tmp=Pike_sp[-2].u.array; DECLARE_CYCLIC(); if((a=(struct array *)BEGIN_CYCLIC(tmp,0))) { ref_push_array(a); }else{ INT32 e; TYPE_FIELD types = 0; #ifdef PIKE_DEBUG struct svalue *save_sp=Pike_sp+1; #endif push_array(a=allocate_array(tmp->size)); SET_CYCLIC_RET(a); for(e=0;e<a->size;e++) { push_svalue(tmp->item+e); o_cast(itype, run_time_itype); stack_pop_to_no_free (ITEM(a) + e); types |= 1 << TYPEOF(ITEM(a)[e]); } a->type_field = types; #ifdef PIKE_DEBUG if(save_sp!=Pike_sp) Pike_fatal("o_cast left stack droppings.\n"); #endif } END_CYCLIC(); assign_svalue(Pike_sp-3,Pike_sp-1); pop_stack(); } pop_stack(); } break; case T_MULTISET: { struct pike_type *itype; INT32 run_time_itype; push_type_value(itype = key_type(type, 0)); run_time_itype = compile_type_to_runtime_type(itype); if(run_time_itype != T_MIXED) { struct multiset *m; struct multiset *tmp=Pike_sp[-2].u.multiset; DECLARE_CYCLIC(); if((m=(struct multiset *)BEGIN_CYCLIC(tmp,0))) { ref_push_multiset(m); }else{ #ifdef PIKE_DEBUG struct svalue *save_sp=Pike_sp+1; #endif ptrdiff_t nodepos; push_multiset (m = allocate_multiset (multiset_sizeof (tmp), multiset_get_flags (tmp), multiset_get_cmp_less (tmp))); SET_CYCLIC_RET(m); if ((nodepos = multiset_first (tmp)) >= 0) { ONERROR uwp; SET_ONERROR (uwp, do_sub_msnode_ref, tmp); do { push_multiset_index (tmp, nodepos); o_cast(itype, run_time_itype); multiset_insert (m, Pike_sp - 1); pop_stack(); } while ((nodepos = multiset_next (tmp, nodepos)) >= 0); UNSET_ONERROR (uwp); sub_msnode_ref (tmp); } #ifdef PIKE_DEBUG if(save_sp!=Pike_sp) Pike_fatal("o_cast left stack droppings.\n"); #endif } END_CYCLIC(); assign_svalue(Pike_sp-3,Pike_sp-1); pop_stack(); } pop_stack(); } break; case T_MAPPING: { struct pike_type *itype, *vtype; INT32 run_time_itype; INT32 run_time_vtype; push_type_value(itype = key_type(type, 0)); run_time_itype = compile_type_to_runtime_type(itype); push_type_value(vtype = index_type(type, mixed_type_string, 0)); run_time_vtype = compile_type_to_runtime_type(vtype); if(run_time_itype != T_MIXED || run_time_vtype != T_MIXED) { struct mapping *m; struct mapping *tmp=Pike_sp[-3].u.mapping; DECLARE_CYCLIC(); if((m=(struct mapping *)BEGIN_CYCLIC(tmp,0))) { ref_push_mapping(m); }else{ INT32 e; struct keypair *k; struct mapping_data *md; #ifdef PIKE_DEBUG struct svalue *save_sp=Pike_sp+1; #endif push_mapping(m=allocate_mapping(m_sizeof(tmp))); SET_CYCLIC_RET(m); md = tmp->data; NEW_MAPPING_LOOP(md) { push_svalue(& k->ind); o_cast(itype, run_time_itype); push_svalue(& k->val); o_cast(vtype, run_time_vtype); mapping_insert(m,Pike_sp-2,Pike_sp-1); pop_n_elems(2); } #ifdef PIKE_DEBUG if(save_sp!=Pike_sp) Pike_fatal("o_cast left stack droppings.\n"); #endif } END_CYCLIC(); assign_svalue(Pike_sp-4,Pike_sp-1); pop_stack(); } pop_n_elems(2); } } } PMOD_EXPORT void f_cast(void) { #ifdef PIKE_DEBUG struct svalue *save_sp=Pike_sp; if(TYPEOF(Pike_sp[-2]) != T_TYPE) Pike_fatal("Cast expression destroyed stack or left droppings! (Type:%d)\n", TYPEOF(Pike_sp[-2])); #endif o_cast(Pike_sp[-2].u.type, compile_type_to_runtime_type(Pike_sp[-2].u.type)); #ifdef PIKE_DEBUG if(save_sp != Pike_sp) Pike_fatal("Internal error: o_cast() left droppings on stack.\n"); #endif free_svalue(Pike_sp-2); Pike_sp[-2]=Pike_sp[-1]; Pike_sp--; dmalloc_touch_svalue(Pike_sp); } /*! @decl mixed __cast(mixed val, string|type type_name) *! *! Cast @[val] to the type indicated by @[type_name]. *! *! @seealso *! @[lfun::cast()] */ static void f___cast(INT32 args) { DECLARE_CYCLIC(); if (args != 2) { SIMPLE_WRONG_NUM_ARGS_ERROR("__cast", 2); } if (BEGIN_CYCLIC(Pike_sp[-1].u.refs, Pike_sp[2].u.refs)) { END_CYCLIC(); pop_n_elems(args); push_undefined(); return; } SET_CYCLIC_RET(1); if (TYPEOF(Pike_sp[-1]) == PIKE_T_STRING) { struct pike_string *type_name = Pike_sp[-1].u.string; if ((type_name->len >= 3) && (type_name->size_shift == eightbit)) { /* Recognized primary types: * * array * float * function * int * mapping * multiset * object * program * string */ switch(type_name->str[0]) { case 'a': if (type_name == literal_array_string) { pop_stack(); ref_push_type_value(array_type_string); } break; case 'f': if (type_name == literal_float_string) { pop_stack(); ref_push_type_value(float_type_string); } break; case 'i': if (type_name == literal_int_string) { pop_stack(); ref_push_type_value(int_type_string); } break; case 'm': if (type_name == literal_mapping_string) { pop_stack(); ref_push_type_value(mapping_type_string); } if (type_name == literal_multiset_string) { pop_stack(); ref_push_type_value(multiset_type_string); } break; case 'o': if (type_name == literal_object_string) { pop_stack(); ref_push_type_value(object_type_string); } break; case 'p': if (type_name == literal_program_string) { pop_stack(); ref_push_type_value(program_type_string); } break; case 's': if (type_name == literal_string_string) { pop_stack(); ref_push_type_value(string_type_string); } break; } } } if (TYPEOF(Pike_sp[-1]) != PIKE_T_TYPE) { END_CYCLIC(); bad_arg_error("__cast", args, 2, "string|type", Pike_sp - 2, "Expected type or type name.\n"); } stack_swap(); f_cast(); END_CYCLIC(); } /* Returns 1 if s is a valid in the type type. */ int low_check_soft_cast(struct svalue *s, struct pike_type *type) { loop: switch(type->type) { case T_MIXED: return 1; case T_ZERO: switch(TYPEOF(*s)) { case PIKE_T_INT: return !s->u.integer; case PIKE_T_FUNCTION: if (SUBTYPEOF(*s) == FUNCTION_BUILTIN) return 0; /* FALLTHRU */ case PIKE_T_OBJECT: return !s->u.object->prog; } return 0; case T_ASSIGN: case PIKE_T_NAME: type = type->cdr; goto loop; case PIKE_T_ATTRIBUTE: { int ret; if (!low_check_soft_cast(s, type->cdr)) return 0; push_svalue(s); ref_push_string((struct pike_string *)type->car); SAFE_MAYBE_APPLY_MASTER("handle_attribute", 2); ret = !SAFE_IS_ZERO(Pike_sp-1) || IS_UNDEFINED(Pike_sp-1); pop_stack(); return ret; } case T_AND: if (!low_check_soft_cast(s, type->car)) return 0; type = type->cdr; goto loop; case T_OR: if (low_check_soft_cast(s, type->car)) return 1; type = type->cdr; goto loop; case T_NOT: return !low_check_soft_cast(s, type->car); } if ((TYPEOF(*s) == PIKE_T_INT) && !s->u.integer) return 1; if (TYPEOF(*s) == type->type) { switch(type->type) { case PIKE_T_INT: if (((((INT32)CAR_TO_INT(type)) != MIN_INT32) && (s->u.integer < (INT32)CAR_TO_INT(type))) || ((((INT32)CDR_TO_INT(type)) != MAX_INT32) && (s->u.integer > (INT32)CDR_TO_INT(type)))) { return 0; } return 1; case PIKE_T_FLOAT: return 1; case PIKE_T_STRING: if ((8<<s->u.string->size_shift) > CAR_TO_INT(type)) { return 0; } return 1; case PIKE_T_OBJECT: { struct program *p; /* Common cases. */ if (!type->cdr) return 1; if (s->u.object->prog->id == CDR_TO_INT(type)) return 1; p = id_to_program(CDR_TO_INT(type)); if (!p) return 1; return implements(s->u.object->prog, p); } case PIKE_T_PROGRAM: { struct program *p; /* Common cases. */ if (!type->car->cdr) return 1; if (s->u.program->id == CDR_TO_INT(type->car)) return 1; p = id_to_program(CDR_TO_INT(type->car)); if (!p) return 1; return implements(s->u.program, p); } case PIKE_T_ARRAY: { struct array *a = s->u.array; int i; for (i = a->size; i--;) { if (!low_check_soft_cast(a->item + i, type->car)) return 0; } } break; case PIKE_T_MULTISET: /* FIXME: Add code here. */ break; case PIKE_T_MAPPING: /* FIXME: Add code here. */ break; case PIKE_T_FUNCTION: /* FIXME: Add code here. */ break; case PIKE_T_TYPE: /* FIXME: Add code here. */ break; } return 1; } if (TYPEOF(*s) == PIKE_T_OBJECT) { int lfun; if (!s->u.object->prog) return 0; if (type->type == PIKE_T_FUNCTION) { if ((lfun = FIND_LFUN(s->u.object->prog, LFUN_CALL)) != -1) { /* FIXME: Add code here. */ return 1; } } if ((lfun = FIND_LFUN(s->u.object->prog, LFUN__IS_TYPE)) != -1) { int ret; push_static_text(get_name_of_type(type->type)); apply_low(s->u.object, lfun, 1); ret = !UNSAFE_IS_ZERO(Pike_sp-1); pop_stack(); return ret; } return 0; } if ((TYPEOF(*s) == PIKE_T_FUNCTION) && (type->type == PIKE_T_PROGRAM)) { /* FIXME: Add code here. */ return 1; } if ((TYPEOF(*s) == PIKE_T_FUNCTION) && (type->type == T_MANY)) { /* FIXME: Add code here. */ return 1; } return 0; } void o_check_soft_cast(struct svalue *s, struct pike_type *type) { if (!low_check_soft_cast(s, type)) { /* Note: get_type_from_svalue() doesn't return a fully specified type * for array, mapping and multiset, so we perform a more lenient * check for them. */ struct pike_type *sval_type = get_type_of_svalue(s); struct pike_string *t1; struct string_builder s; char *fname = "__soft-cast"; ONERROR tmp0; ONERROR tmp1; init_string_builder(&s, 0); SET_ONERROR(tmp0, free_string_builder, &s); string_builder_explain_nonmatching_types(&s, type, sval_type); if (Pike_fp->current_program) { /* Look up the function-name */ struct pike_string *name = ID_FROM_INT(Pike_fp->current_program, Pike_fp->fun)->name; if ((!name->size_shift) && (name->len < 100)) fname = name->str; } t1 = describe_type(type); SET_ONERROR(tmp1, do_free_string, t1); free_type(sval_type); bad_arg_error(NULL, -1, 1, t1->str, Pike_sp-1, "%s(): Soft cast failed.\n%S", fname, s.s); UNREACHABLE(CALL_AND_UNSET_ONERROR(tmp1)); UNREACHABLE(CALL_AND_UNSET_ONERROR(tmp0)); } } #define COMPARISON(ID,NAME,FUN) \ PMOD_EXPORT void ID(INT32 args) \ { \ int i; \ switch(args) \ { \ case 0: case 1: \ SIMPLE_WRONG_NUM_ARGS_ERROR(NAME, 2); \ case 2: \ i=FUN (Pike_sp-2,Pike_sp-1); \ pop_n_elems(2); \ push_int(i); \ break; \ default: \ for(i=1;i<args;i++) \ if(! ( FUN (Pike_sp-args+i-1, Pike_sp-args+i))) \ break; \ pop_n_elems(args); \ push_int(i==args); \ } \ } /*! @decl int(0..1) `!=(mixed arg1, mixed arg2, mixed ... extras) *! *! Inequality test. *! *! Every expression with the @expr{!=@} operator becomes a call to *! this function, i.e. @expr{a!=b@} is the same as *! @expr{predef::`!=(a,b)@}. *! *! This is the inverse of @[`==()]; see that function for further *! details. *! *! @returns *! Returns @expr{1@} if the test is successful, @expr{0@} *! otherwise. *! *! @seealso *! @[`==()] */ PMOD_EXPORT void f_ne(INT32 args) { f_eq(args); /* f_eq and friends always returns 1 or 0. */ Pike_sp[-1].u.integer = !Pike_sp[-1].u.integer; } /*! @decl int(0..1) `==(mixed arg1, mixed arg2, mixed ... extras) *! *! Equality test. *! *! Every expression with the @expr{==@} operator becomes a call to *! this function, i.e. @expr{a==b@} is the same as *! @expr{predef::`==(a,b)@}. *! *! If more than two arguments are given, each argument is compared *! with the following one as described below, and the test is *! successful iff all comparisons are successful. *! *! If the first argument is an object with an @[lfun::`==()], that *! function is called with the second as argument, unless the *! second argument is the same as the first argument. The test is *! successful iff its result is nonzero (according to @[`!]). *! *! Otherwise, if the second argument is an object with an *! @[lfun::`==()], that function is called with the first as *! argument, and the test is successful iff its result is nonzero *! (according to @[`!]). *! *! Otherwise, if the arguments are of different types, the test is *! unsuccessful. Function pointers to programs are automatically *! converted to program pointers if necessary, though. *! *! Otherwise the test depends on the type of the arguments: *! @mixed *! @type int *! Successful iff the two integers are numerically equal. *! @type float *! Successful iff the two floats are numerically equal and *! not NaN. *! @type string *! Successful iff the two strings are identical, character for *! character. (Since all strings are kept unique, this is *! actually a test whether the arguments point to the same *! string, and it therefore run in constant time.) *! @type array|mapping|multiset|object|function|program|type *! Successful iff the two arguments point to the same instance. *! @endmixed *! *! @returns *! Returns @expr{1@} if the test is successful, @expr{0@} *! otherwise. *! *! @note *! Floats and integers are not automatically converted to test *! against each other, so e.g. @expr{0==0.0@} is false. *! *! @note *! Programs are not automatically converted to types to be compared *! type-wise. *! *! @seealso *! @[`!()], @[`!=()] */ COMPARISON(f_eq,"`==", is_eq) /*! @decl int(0..1) `<(mixed arg1, mixed arg2, mixed ... extras) *! *! Less than test. *! *! Every expression with the @expr{<@} operator becomes a call to *! this function, i.e. @expr{a<b@} is the same as *! @expr{predef::`<(a,b)@}. *! *! @returns *! Returns @expr{1@} if the test is successful, @expr{0@} *! otherwise. *! *! @seealso *! @[`<=()], @[`>()], @[`>=()] */ COMPARISON(f_lt,"`<" , is_lt) /*! @decl int(0..1) `<=(mixed arg1, mixed arg2, mixed ... extras) *! *! Less than or equal test. *! *! Every expression with the @expr{<=@} operator becomes a call to *! this function, i.e. @expr{a<=b@} is the same as *! @expr{predef::`<=(a,b)@}. *! *! @returns *! Returns @expr{1@} if the test is successful, @expr{0@} *! otherwise. *! *! @note *! For total orders, e.g. integers, this is the inverse of @[`>()]. *! *! @seealso *! @[`<()], @[`>()], @[`>=()] */ COMPARISON(f_le,"`<=",is_le) /*! @decl int(0..1) `>(mixed arg1, mixed arg2, mixed ... extras) *! *! Greater than test. *! *! Every expression with the @expr{>@} operator becomes a call to *! this function, i.e. @expr{a>b@} is the same as *! @expr{predef::`>(a,b)@}. *! *! @returns *! Returns @expr{1@} if the arguments are strictly decreasing, and *! @expr{0@} (zero) otherwise. *! *! @seealso *! @[`<()], @[`<=()], @[`>=()] */ COMPARISON(f_gt,"`>" , is_gt) /*! @decl int(0..1) `>=(mixed arg1, mixed arg2, mixed ... extras) *! *! Greater than or equal test. *! *! Every expression with the @expr{>=@} operator becomes a call to *! this function, i.e. @expr{a>=b@} is the same as *! @expr{predef::`>=(a,b)@}. *! *! @returns *! Returns @expr{1@} if the test is successful, @expr{0@} *! otherwise. *! *! @note *! For total orders, e.g. integers, this is the inverse of @[`<()]. *! *! @seealso *! @[`<=()], @[`>()], @[`<()] */ COMPARISON(f_ge,"`>=",is_ge) /* Helper function for calling ``-operators. * * Assumes o is at Pike_sp[e - args]. * * i is the resolved lfun to call. * * Returns the number of remaining elements on the stack. */ PMOD_EXPORT INT32 low_rop(struct object *o, int i, INT32 e, INT32 args) { if (e == args-1) { /* The object is the last argument. */ ONERROR err; Pike_sp--; SET_ONERROR(err, do_free_object, o); apply_low(o, i, e); CALL_AND_UNSET_ONERROR(err); return args - e; } else { /* Rotate the stack, so that the @[e] first elements come last. */ struct svalue *tmp; if (e*2 < args) { tmp = xalloc(e*sizeof(struct svalue)); memcpy(tmp, Pike_sp-args, e*sizeof(struct svalue)); memmove(Pike_sp-args, (Pike_sp-args)+e, (args-e)*sizeof(struct svalue)); memcpy(Pike_sp-e, tmp, e*sizeof(struct svalue)); } else { tmp = xalloc((args-e)*sizeof(struct svalue)); memcpy(tmp, (Pike_sp-args)+e, (args-e)*sizeof(struct svalue)); memmove(Pike_sp-e, Pike_sp-args, e*sizeof(struct svalue)); memcpy(Pike_sp-args, tmp, (args-e)*sizeof(struct svalue)); } free(tmp); /* Now the stack is: * * -args object with the lfun. * ... * ... other arguments * ... * -e first argument. * ... * -1 last argument before the object. */ #ifdef PIKE_DEBUG if (TYPEOF(Pike_sp[-args]) != T_OBJECT || Pike_sp[-args].u.object != o || !o->prog) { Pike_fatal("low_rop() Lost track of object.\n"); } #endif /* PIKE_DEBUG */ apply_low(o, i, e); args -= e; /* Replace the object with the result. */ assign_svalue(Pike_sp-(args+1), Pike_sp-1); pop_stack(); return args; } } static void add_strings(INT32 args) { struct pike_string *r; PCHARP buf; ptrdiff_t tmp; int max_shift=0; ptrdiff_t size=0,e; int num=0; for(e=-args;e<0;e++) { if(Pike_sp[e].u.string->len != 0) num++; size += Pike_sp[e].u.string->len; if(Pike_sp[e].u.string->size_shift > max_shift) max_shift=Pike_sp[e].u.string->size_shift; } /* All strings are empty. */ if(num == 0) { pop_n_elems(args-1); return; } /* Only one string has length. */ if(num == 1) { for(e=-args;e<0;e++) { if( Pike_sp[e].u.string->len ) { if( e != -args ) { r = Pike_sp[e].u.string; Pike_sp[e].u.string = Pike_sp[-args].u.string; Pike_sp[-args].u.string = r; } } } pop_n_elems(args-1); return; } tmp=Pike_sp[-args].u.string->len; r=new_realloc_shared_string(Pike_sp[-args].u.string,size,max_shift); mark_free_svalue (Pike_sp - args); buf=MKPCHARP_STR_OFF(r,tmp); for(e=-args+1;e<0;e++) { if( Pike_sp[e].u.string->len ) { update_flags_for_add( r, Pike_sp[e].u.string ); pike_string_cpy(buf,Pike_sp[e].u.string); INC_PCHARP(buf,Pike_sp[e].u.string->len); } free_string(Pike_sp[e].u.string); } Pike_sp -= args-1; SET_SVAL(Pike_sp[-1], T_STRING, 0, string, low_end_shared_string(r)); } static int pair_add() { if(TYPEOF(Pike_sp[-1]) == PIKE_T_OBJECT || TYPEOF(Pike_sp[-2]) == PIKE_T_OBJECT) { if(TYPEOF(Pike_sp[-2]) == PIKE_T_OBJECT && /* Note: pairwise add always has an extra reference! */ Pike_sp[-2].u.object->refs == 2 && call_lhs_lfun(LFUN_ADD_EQ,2)) return 1; /* optimized version of +. */ if(call_lfun(LFUN_ADD, LFUN_RADD)) return !IS_UNDEFINED(Pike_sp-1); } if (TYPEOF(Pike_sp[-2]) != TYPEOF(Pike_sp[-1])) { if(IS_UNDEFINED(Pike_sp-2)) { stack_swap(); pop_stack(); return 1; } if(IS_UNDEFINED(Pike_sp-1)) { pop_stack(); return 1; } /* string + X && X + string -> string */ if( TYPEOF(Pike_sp[-2]) == PIKE_T_STRING ) o_cast_to_string(); else if( TYPEOF(Pike_sp[-1]) == PIKE_T_STRING ) { stack_swap(); o_cast_to_string(); stack_swap(); } else if( TYPEOF(Pike_sp[-2]) == PIKE_T_FLOAT ) { if( TYPEOF(Pike_sp[-1]) == PIKE_T_INT ) { Pike_sp[-1].u.float_number = Pike_sp[-1].u.integer; TYPEOF(Pike_sp[-1]) = PIKE_T_FLOAT; } } else if( TYPEOF(Pike_sp[-1]) == PIKE_T_FLOAT ) { if( TYPEOF(Pike_sp[-2]) == PIKE_T_INT ) { Pike_sp[-2].u.float_number = Pike_sp[-2].u.integer; TYPEOF(Pike_sp[-2]) = PIKE_T_FLOAT; } } if (TYPEOF(Pike_sp[-2]) != TYPEOF(Pike_sp[-1])) return 0; } /* types now identical. */ switch(TYPEOF(Pike_sp[-1])) { /* Note: these cases mainly tend to happen when there is an object in the argument list. otherwise pairwise addition is not done using this code. */ case PIKE_T_INT: { INT_TYPE res; if (DO_INT_TYPE_ADD_OVERFLOW(Pike_sp[-2].u.integer, Pike_sp[-1].u.integer, &res)) { convert_svalue_to_bignum(Pike_sp-2); if (LIKELY(call_lfun(LFUN_ADD,LFUN_RADD))) { return 1; } Pike_fatal("Failed to call `+() in bignum.\n"); } Pike_sp[-2].u.integer = res; Pike_sp--; } return 1; case PIKE_T_FLOAT: Pike_sp[-2].u.float_number += Pike_sp[-1].u.float_number; Pike_sp--; return 1; case PIKE_T_STRING: Pike_sp[-2].u.string = add_and_free_shared_strings(Pike_sp[-2].u.string, Pike_sp[-1].u.string); Pike_sp--; return 1; case PIKE_T_ARRAY: push_array( add_arrays(Pike_sp-2,2) ); stack_swap(); pop_stack(); stack_swap(); pop_stack(); return 1; case PIKE_T_MAPPING: push_mapping( add_mappings(Pike_sp-2,2) ); stack_swap(); pop_stack(); stack_swap(); pop_stack(); return 1; case PIKE_T_MULTISET: push_multiset( add_multisets(Pike_sp-2,2) ); stack_swap(); pop_stack(); stack_swap(); pop_stack(); return 1; case PIKE_T_OBJECT: return call_lfun(LFUN_ADD,LFUN_RADD); } return 0; } /*! @decl mixed `+(mixed arg) *! @decl mixed `+(object arg, mixed ... more) *! @decl int `+(int arg, int ... more) *! @decl float `+(float|int arg, float|int ... more) *! @decl string `+(string|float|int arg, string|float|int ... more) *! @decl array `+(array arg, array ... more) *! @decl mapping `+(mapping arg, mapping ... more) *! @decl multiset `+(multiset arg, multiset ... more) *! *! Addition/concatenation. *! *! Every expression with the @expr{+@} operator becomes a call to *! this function, i.e. @expr{a+b@} is the same as *! @expr{predef::`+(a,b)@}. Longer @expr{+@} expressions are *! normally optimized to one call, so e.g. @expr{a+b+c@} becomes *! @expr{predef::`+(a,b,c)@}. *! *! @returns *! If there's a single argument, that argument is returned. *! *! If @[arg] is an object with only one reference and an *! @[lfun::`+=()], that function is called with the rest of the *! arguments, and its result is returned. *! *! Otherwise, if @[arg] is an object with an @[lfun::`+()], that *! function is called with the rest of the arguments, and its *! result is returned. *! *! Otherwise, if any of the other arguments is an object that has *! an @[lfun::``+()], the first such function is called with the *! arguments leading up to it, and @[`+()] is then called *! recursively with the result and the rest of the arguments. *! *! Otherwise, if @[arg] is @[UNDEFINED] and the other arguments are *! either arrays, mappings or multisets, the first argument is *! ignored and the remaining are added together as described below. *! This is useful primarily when appending to mapping values since *! @expr{m[x] += ({foo})@} will work even if @expr{m[x]@} doesn't *! exist yet. *! *! Otherwise the result depends on the argument types: *! @mixed *! @type int|float *! The result is the sum of all the arguments. It's a float if *! any argument is a float. *! @type string|int|float *! If any argument is a string, all will be converted to *! strings and concatenated in order to form the result. *! @type array *! The array arguments are concatened in order to form the *! result. *! @type mapping *! The result is like @[arg] but extended with the entries from *! the other arguments. If the same index (according to *! @[hash_value] and @[`==]) occur in several arguments, the *! value from the last one is used. *! @type multiset *! The result is like @[arg] but extended with the entries from *! the other arguments. Subsequences with orderwise equal *! indices (i.e. where @[`<] returns false) are concatenated *! into the result in argument order. *! @endmixed *! The function is not destructive on the arguments - the result is *! always a new instance. *! *! @note *! In Pike 7.0 and earlier the addition order was unspecified. *! *! The treatment of @[UNDEFINED] was new *! in Pike 7.0. *! *! @seealso *! @[`-()], @[lfun::`+()], @[lfun::``+()] */ PMOD_EXPORT void f_add(INT32 args) { INT_TYPE e; TYPE_FIELD types=0; if(!args) SIMPLE_WRONG_NUM_ARGS_ERROR("`+", 1); if (args == 1) return; for(e=-args;e<0;e++) types |= 1<<TYPEOF(Pike_sp[e]); switch(types) { default: pairwise_add: { struct svalue *s=Pike_sp-args; push_svalue(s); for(e=1;e<args;e++) { push_svalue(s+e); if(!pair_add()) { Pike_error("Addition on unsupported types: %s + %s\nm", get_name_of_type(TYPEOF(*(s+e))), get_name_of_type(TYPEOF(*s))); } } assign_svalue(s,Pike_sp-1); pop_n_elems(Pike_sp-s-1); return; } case BIT_STRING: add_strings(args); return; case BIT_STRING | BIT_INT: case BIT_STRING | BIT_FLOAT: case BIT_STRING | BIT_FLOAT | BIT_INT: if ((TYPEOF(Pike_sp[-args]) != T_STRING) && (TYPEOF(Pike_sp[1-args]) != T_STRING)) { /* Note: Could easily use pairwise add until at first string. */ goto pairwise_add; } for(e=-args;e<0;e++) { if( TYPEOF(Pike_sp[e]) != PIKE_T_STRING ) { *Pike_sp = Pike_sp[e]; Pike_sp++; o_cast_to_string(); /* free:s old Pike_sp[e] */ Pike_sp[e-1] = Pike_sp[-1]; Pike_sp--; } } add_strings(args); return; case BIT_INT: { INT_TYPE size = Pike_sp[-args].u.integer; for(e = -args+1; e < 0; e++) { if (DO_INT_TYPE_ADD_OVERFLOW(size, Pike_sp[e].u.integer, &size)) { convert_svalue_to_bignum(Pike_sp-args); f_add(args); return; } } Pike_sp-=args; push_int(size); break; } case BIT_FLOAT: { FLOAT_ARG_TYPE res = Pike_sp[-args].u.float_number; for(e=args-1; e>0; e-- ) res += Pike_sp[-e].u.float_number; Pike_sp -= args-1; Pike_sp[-1].u.float_number = res; } break; case BIT_FLOAT|BIT_INT: { FLOAT_ARG_TYPE res = 0.0; int i; for(i=0; i<args; i++) if (TYPEOF(Pike_sp[i-args]) == T_FLOAT) res += Pike_sp[i-args].u.float_number; else res += (FLOAT_ARG_TYPE)Pike_sp[i-args].u.integer; Pike_sp-=args; push_float(res); return; } #define ADD(TYPE, ADD_FUNC, PUSH_FUNC) do { \ struct TYPE *x = ADD_FUNC (Pike_sp - args, args); \ pop_n_elems (args); \ PUSH_FUNC (x); \ return; \ } while (0) #define REMOVE_UNDEFINED(TYPE) \ do { \ int to = -args, i=-args; \ for(; i<0; i++) \ { \ if(TYPEOF(Pike_sp[i]) == PIKE_T_INT) \ { \ if(!IS_UNDEFINED(Pike_sp+i)) \ SIMPLE_ARG_TYPE_ERROR("`+", args+i, #TYPE); \ } \ else if(to!=i) \ Pike_sp[to++] = Pike_sp[i]; \ else to++; \ } \ for(i=to; i<0; i++) \ TYPEOF(Pike_sp[i])=PIKE_T_INT; \ Pike_sp += to; \ args += to; \ } while(0); case BIT_ARRAY|BIT_INT: REMOVE_UNDEFINED (array); /* Fallthrough */ case BIT_ARRAY: ADD (array, add_arrays, push_array); break; case BIT_MAPPING|BIT_INT: REMOVE_UNDEFINED (mapping); /* Fallthrough */ case BIT_MAPPING: ADD (mapping, add_mappings, push_mapping); break; case BIT_MULTISET|BIT_INT: REMOVE_UNDEFINED (multiset); /* Fallthrough */ case BIT_MULTISET: ADD (multiset, add_multisets, push_multiset); break; #undef REMOVE_UNDEFINED #undef ADD } } static int generate_sum(node *n) { struct compilation *c = THIS_COMPILATION; node **first_arg, **second_arg, **third_arg; switch(count_args(CDR(n))) { case 0: return 0; case 1: do_docode(CDR(n),0); return 1; case 2: first_arg=my_get_arg(&_CDR(n), 0); second_arg=my_get_arg(&_CDR(n), 1); do_docode(CDR(n),DO_NOT_COPY_TOPLEVEL); if(first_arg[0]->type == float_type_string && second_arg[0]->type == float_type_string) { emit0(F_ADD_FLOATS); } else if(first_arg[0]->type && second_arg[0]->type && pike_types_le(first_arg[0]->type, int_type_string, 0, 0) && pike_types_le(second_arg[0]->type, int_type_string, 0, 0)) { emit0(F_ADD_INTS); } else { emit0(F_ADD); } modify_stack_depth(-1); return 1; case 3: first_arg = my_get_arg(&_CDR(n), 0); second_arg = my_get_arg(&_CDR(n), 1); third_arg = my_get_arg(&_CDR(n), 2); if(first_arg[0]->type == float_type_string && second_arg[0]->type == float_type_string) { do_docode(*first_arg, 0); do_docode(*second_arg, 0); emit0(F_ADD_FLOATS); modify_stack_depth(-1); if (third_arg[0]->type == float_type_string) { do_docode(*third_arg, 0); emit0(F_ADD_FLOATS); modify_stack_depth(-1); return 1; } } else if(first_arg[0]->type && second_arg[0]->type && pike_types_le(first_arg[0]->type, int_type_string, 0, 0) && pike_types_le(second_arg[0]->type, int_type_string, 0, 0)) { do_docode(*first_arg, 0); do_docode(*second_arg, 0); emit0(F_ADD_INTS); modify_stack_depth(-1); if (third_arg[0]->type && pike_types_le(third_arg[0]->type, int_type_string, 0, 0)) { do_docode(*third_arg, 0); emit0(F_ADD_INTS); modify_stack_depth(-1); return 1; } } else { return 0; } do_docode(*third_arg, 0); emit0(F_ADD); modify_stack_depth(-1); return 1; default: return 0; } } static node *optimize_eq(node *n) { node **first_arg, **second_arg, *ret; if(count_args(CDR(n))==2) { first_arg=my_get_arg(&_CDR(n), 0); second_arg=my_get_arg(&_CDR(n), 1); #ifdef PIKE_DEBUG if(!first_arg || !second_arg) Pike_fatal("Couldn't find argument!\n"); #endif if (((*second_arg)->token == F_CONSTANT) && (TYPEOF((*second_arg)->u.sval) == T_STRING) && ((*first_arg)->token == F_RANGE)) { node *low = CADR (*first_arg), *high = CDDR (*first_arg); INT_TYPE c; if ((low->token == F_RANGE_OPEN || (low->token == F_RANGE_FROM_BEG && (CAR (low)->token == F_CONSTANT) && (TYPEOF(CAR (low)->u.sval) == T_INT) && (!(CAR (low)->u.sval.u.integer)))) && (high->token == F_RANGE_OPEN || (high->token == F_RANGE_FROM_BEG && (CAR (high)->token == F_CONSTANT) && (TYPEOF(CAR (high)->u.sval) == T_INT) && (c = CAR (high)->u.sval.u.integer, 1)))) { /* str[..c] == "foo" or str[0..c] == "foo" or * str[..] == "foo" or str[0..] == "foo" */ if (high->token == F_RANGE_OPEN || (*second_arg)->u.sval.u.string->len <= c) { /* str[..4] == "foo" * ==> * str == "foo" */ /* FIXME: Warn? */ ADD_NODE_REF2(CAR(*first_arg), ADD_NODE_REF2(*second_arg, ret = mkopernode("`==", CAR(*first_arg), *second_arg); )); return ret; } else if ((*second_arg)->u.sval.u.string->len == c+1) { /* str[..2] == "foo" * ==> * has_prefix(str, "foo"); */ ADD_NODE_REF2(CAR(*first_arg), ADD_NODE_REF2(*second_arg, ret = mkopernode("has_prefix", CAR(*first_arg), *second_arg); )); return ret; } else { /* str[..1] == "foo" * ==> * (str, 0) */ /* FIXME: Warn? */ ADD_NODE_REF2(CAR(*first_arg), ret = mknode(F_COMMA_EXPR, CAR(*first_arg), mkintnode(0)); ); return ret; } } } } return 0; } static node *optimize_not(node *n) { node **first_arg, **more_args; if(count_args(CDR(n))==1) { first_arg=my_get_arg(&_CDR(n), 0); #ifdef PIKE_DEBUG if(!first_arg) Pike_fatal("Couldn't find argument!\n"); #endif if(node_is_true(*first_arg)) return mkintnode(0); if(node_is_false(*first_arg)) return mkintnode(1); #define TMP_OPT(X,Y) do { \ if((more_args=is_call_to(*first_arg, X))) \ { \ node *tmp=*more_args; \ if(count_args(*more_args) > 2) return 0; \ ADD_NODE_REF(*more_args); \ return mkopernode(Y,tmp,0); \ } } while(0) TMP_OPT(f_eq, "`!="); TMP_OPT(f_ne, "`=="); #if 0 /* The following only work on total orders. We can't assume that. */ TMP_OPT(f_lt, "`>="); TMP_OPT(f_gt, "`<="); TMP_OPT(f_le, "`>"); TMP_OPT(f_ge, "`<"); #endif #undef TMP_OPT if((more_args = is_call_to(*first_arg, f_search)) && (count_args(*more_args) == 2)) { node *search_args = *more_args; if ((search_args->token == F_ARG_LIST) && CAR(search_args) && pike_types_le(CAR(search_args)->type, string_type_string, 0, 0) && CDR(search_args) && pike_types_le(CDR(search_args)->type, string_type_string, 0, 0)) { /* !search(string a, string b) => has_prefix(a, b) */ ADD_NODE_REF(*more_args); return mkefuncallnode("has_prefix", search_args); } } } return 0; } static node *may_have_side_effects(node *n) { node **arg; int argno; for (argno = 0; (arg = my_get_arg(&_CDR(n), argno)); argno++) { if (((*arg)->type != zero_type_string) && match_types(object_type_string, (*arg)->type)) { n->node_info |= OPT_SIDE_EFFECT; n->tree_info |= OPT_SIDE_EFFECT; return NULL; } } return NULL; } static node *optimize_binary(node *n) { node **first_arg, **second_arg, *ret; int args; if((args = count_args(CDR(n)))==2) { first_arg=my_get_arg(&_CDR(n), 0); second_arg=my_get_arg(&_CDR(n), 1); #ifdef PIKE_DEBUG if(!first_arg || !second_arg) Pike_fatal("Couldn't find argument!\n"); #endif if((*second_arg)->type == (*first_arg)->type && compile_type_to_runtime_type((*second_arg)->type) != T_MIXED) { if((*first_arg)->token == F_APPLY && CAR(*first_arg)->token == F_CONSTANT && is_eq(& CAR(*first_arg)->u.sval, & CAR(n)->u.sval)) { /* binop(binop(@a_args), b) ==> binop(@a_args, b) */ ADD_NODE_REF2(CAR(n), ADD_NODE_REF2(CDR(*first_arg), ADD_NODE_REF2(*second_arg, ret = mknode(F_APPLY, CAR(n), mknode(F_ARG_LIST, CDR(*first_arg), *second_arg)) ))); return ret; } if((*second_arg)->token == F_APPLY && CAR(*second_arg)->token == F_CONSTANT && is_eq(& CAR(*second_arg)->u.sval, & CAR(n)->u.sval)) { /* binop(a, binop(@b_args)) ==> binop(a, @b_args) */ ADD_NODE_REF2(CAR(n), ADD_NODE_REF2(*first_arg, ADD_NODE_REF2(CDR(*second_arg), ret = mknode(F_APPLY, CAR(n), mknode(F_ARG_LIST, *first_arg, CDR(*second_arg))) ))); return ret; } } } #if 0 /* Does not work for multiplication. */ /* Strengthen the string type. */ if (n->type && (n->type->type == T_STRING) && CAR_TO_INT(n->type) == 32 && (args > 0)) { int str_width = 6; /* Width generated in int and float conversions. */ while (args--) { struct pike_type *t; node **arg = my_get_arg(&_CDR(n), args); if (!arg || !(t = (*arg)->type)) continue; if (t->type == T_STRING) { int w = CAR_TO_INT(t); if (w > str_width) str_width = w; } } if (str_width != 32) { type_stack_mark(); push_int_type(0, (1<<str_width)-1); push_unlimited_array_type(T_STRING); free_type(n->type); n->type = pop_unfinished_type(); } } #endif /* 0 */ return 0; } static int generate_comparison(node *n) { if(count_args(CDR(n))==2) { struct compilation *c = THIS_COMPILATION; if(do_docode(CDR(n),DO_NOT_COPY) != 2) Pike_fatal("Count args was wrong in generate_comparison.\n"); if(CAR(n)->u.sval.u.efun->function == f_eq) emit0(F_EQ); else if(CAR(n)->u.sval.u.efun->function == f_ne) emit0(F_NE); else if(CAR(n)->u.sval.u.efun->function == f_lt) emit0(F_LT); else if(CAR(n)->u.sval.u.efun->function == f_le) emit0(F_LE); else if(CAR(n)->u.sval.u.efun->function == f_gt) emit0(F_GT); else if(CAR(n)->u.sval.u.efun->function == f_ge) emit0(F_GE); else Pike_fatal("Couldn't generate comparison!\n" "efun->function: %p\n" "f_eq: %p\n" "f_ne: %p\n" "f_lt: %p\n" "f_le: %p\n" "f_gt: %p\n" "f_ge: %p\n", CAR(n)->u.sval.u.efun->function, f_eq, f_ne, f_lt, f_le, f_gt, f_ge); modify_stack_depth(-1); return 1; } return 0; } static int float_promote(void) { if(TYPEOF(Pike_sp[-2]) == T_INT && TYPEOF(Pike_sp[-1]) == T_FLOAT) { SET_SVAL(Pike_sp[-2], T_FLOAT, 0, float_number, (FLOAT_TYPE)Pike_sp[-2].u.integer); return 1; } else if(TYPEOF(Pike_sp[-1]) == T_INT && TYPEOF(Pike_sp[-2]) == T_FLOAT) { SET_SVAL(Pike_sp[-1], T_FLOAT, 0, float_number, (FLOAT_TYPE)Pike_sp[-1].u.integer); return 1; } if(is_bignum_object_in_svalue(Pike_sp-2) && TYPEOF(Pike_sp[-1]) == T_FLOAT) { stack_swap(); ref_push_type_value(float_type_string); stack_swap(); f_cast(); stack_swap(); return 1; } else if(is_bignum_object_in_svalue(Pike_sp-1) && TYPEOF(Pike_sp[-2]) == T_FLOAT) { ref_push_type_value(float_type_string); stack_swap(); f_cast(); return 1; } return 0; } static int has_lfun(enum LFUN lfun, int arg) { struct program *p; if(TYPEOF(Pike_sp[-arg]) == T_OBJECT && (p = Pike_sp[-arg].u.object->prog)) return FIND_LFUN(p->inherits[SUBTYPEOF(Pike_sp[-arg])].prog, lfun); return -1; } static int call_lhs_lfun( enum LFUN lfun, int arg ) { int i = has_lfun(lfun,arg); if(i != -1) { apply_low(Pike_sp[-arg].u.object, i, arg-1); return 1; } return 0; } static int call_lfun(enum LFUN left, enum LFUN right) { struct object *o; struct program *p; int i; if(TYPEOF(Pike_sp[-2]) == T_OBJECT && (p = (o = Pike_sp[-2].u.object)->prog) && (i = FIND_LFUN(p->inherits[SUBTYPEOF(Pike_sp[-2])].prog, left)) != -1) { apply_low(o, i, 1); free_svalue(Pike_sp-2); Pike_sp[-2]=Pike_sp[-1]; Pike_sp--; dmalloc_touch_svalue(Pike_sp); return 1; } if(TYPEOF(Pike_sp[-1]) == T_OBJECT && (p = (o = Pike_sp[-1].u.object)->prog) && (i = FIND_LFUN(p->inherits[SUBTYPEOF(Pike_sp[-1])].prog, right)) != -1) { push_svalue(Pike_sp-2); apply_low(o, i, 1); free_svalue(Pike_sp-3); Pike_sp[-3]=Pike_sp[-1]; Pike_sp--; dmalloc_touch_svalue(Pike_sp); pop_stack(); return 1; } return 0; } struct mapping *merge_mapping_array_ordered(struct mapping *a, struct array *b, INT32 op); struct mapping *merge_mapping_array_unordered(struct mapping *a, struct array *b, INT32 op); PMOD_EXPORT void o_subtract(void) { if (TYPEOF(Pike_sp[-2]) != TYPEOF(Pike_sp[-1]) && !float_promote()) { if(call_lfun(LFUN_SUBTRACT, LFUN_RSUBTRACT)) return; if (TYPEOF(Pike_sp[-2]) == T_MAPPING) switch (TYPEOF(Pike_sp[-1])) { case T_ARRAY: { struct mapping *m; m=merge_mapping_array_unordered(Pike_sp[-2].u.mapping, Pike_sp[-1].u.array, PIKE_ARRAY_OP_SUB); pop_n_elems(2); push_mapping(m); return; } case T_MULTISET: { struct mapping *m; int got_cmp_less = !!multiset_get_cmp_less (Pike_sp[-1].u.multiset); struct array *ind = multiset_indices (Pike_sp[-1].u.multiset); pop_stack(); push_array (ind); if (got_cmp_less) m=merge_mapping_array_unordered(Pike_sp[-2].u.mapping, Pike_sp[-1].u.array, PIKE_ARRAY_OP_SUB); else m=merge_mapping_array_ordered(Pike_sp[-2].u.mapping, Pike_sp[-1].u.array, PIKE_ARRAY_OP_SUB); pop_n_elems(2); push_mapping(m); return; } } bad_arg_error("`-", 2, 2, get_name_of_type(TYPEOF(Pike_sp[-2])), Pike_sp-1, "Subtract on different types.\n"); } switch(TYPEOF(Pike_sp[-2])) { case T_OBJECT: if(!call_lfun(LFUN_SUBTRACT, LFUN_RSUBTRACT)) PIKE_ERROR("`-", "Subtract on objects without `- operator.\n", Pike_sp, 2); return; case T_ARRAY: { struct array *a; check_array_for_destruct(Pike_sp[-2].u.array); check_array_for_destruct(Pike_sp[-1].u.array); a = subtract_arrays(Pike_sp[-2].u.array, Pike_sp[-1].u.array); pop_n_elems(2); push_array(a); return; } case T_MAPPING: { struct mapping *m; m=merge_mappings(Pike_sp[-2].u.mapping, Pike_sp[-1].u.mapping,PIKE_ARRAY_OP_SUB); pop_n_elems(2); push_mapping(m); return; } case T_MULTISET: { struct multiset *l; l=merge_multisets(Pike_sp[-2].u.multiset, Pike_sp[-1].u.multiset, PIKE_ARRAY_OP_SUB); pop_n_elems(2); push_multiset(l); return; } case T_FLOAT: Pike_sp--; Pike_sp[-1].u.float_number -= Pike_sp[0].u.float_number; return; case T_INT: if(INT_TYPE_SUB_OVERFLOW(Pike_sp[-2].u.integer, Pike_sp[-1].u.integer)) { convert_stack_top_to_bignum(); if (LIKELY(call_lfun(LFUN_SUBTRACT, LFUN_RSUBTRACT))) { return; } Pike_fatal("Failed to call `-() in bignum.\n"); } Pike_sp--; SET_SVAL(Pike_sp[-1], PIKE_T_INT, NUMBER_NUMBER, integer, Pike_sp[-1].u.integer - Pike_sp[0].u.integer); return; case T_STRING: { struct pike_string *s,*ret; s=make_shared_string(""); ret=string_replace(Pike_sp[-2].u.string,Pike_sp[-1].u.string,s); free_string(Pike_sp[-2].u.string); free_string(Pike_sp[-1].u.string); free_string(s); Pike_sp[-2].u.string=ret; Pike_sp--; return; } case T_TYPE: { struct pike_type *t = type_binop(PT_BINOP_MINUS, Pike_sp[-2].u.type, Pike_sp[-1].u.type, 0, 0, 0); pop_n_elems(2); if (t) { push_type_value(t); } else { push_undefined(); } return; } default: { int args = 2; SIMPLE_ARG_TYPE_ERROR("`-", 1, "int|float|string|mapping|multiset|array|object"); } } } /*! @decl mixed `-(mixed arg1) *! @decl mixed `-(mixed arg1, mixed arg2, mixed ... extras) *! @decl mixed `-(object arg1, mixed arg2) *! @decl mixed `-(mixed arg1, object arg2) *! @decl int `-(int arg1, int arg2) *! @decl float `-(float arg1, int|float arg2) *! @decl float `-(int|float arg1, float arg2) *! @decl string `-(string arg1, string arg2) *! @decl array `-(array arg1, array arg2) *! @decl mapping `-(mapping arg1, array arg2) *! @decl mapping `-(mapping arg1, mapping arg2) *! @decl mapping `-(mapping arg1, multiset arg2) *! @decl multiset `-(multiset arg1, multiset arg2) *! *! Negation/subtraction/set difference. *! *! Every expression with the @expr{-@} operator becomes a call to *! this function, i.e. @expr{-a@} is the same as *! @expr{predef::`-(a)@} and @expr{a-b@} is the same as *! @expr{predef::`-(a,b)@}. Longer @expr{-@} expressions are *! normally optimized to one call, so e.g. @expr{a-b-c@} becomes *! @expr{predef::`-(a,b,c)@}. *! *! @returns *! If there's a single argument, that argument is returned negated. *! If @[arg1] is an object with an @[lfun::`-()], that function is *! called without arguments, and its result is returned. *! *! If there are more than two arguments the result is: *! @expr{`-(`-(@[arg1], @[arg2]), @@@[extras])@}. *! *! Otherwise, if @[arg1] is an object with an @[lfun::`-()], that *! function is called with @[arg2] as argument, and its result is *! returned. *! *! Otherwise, if @[arg2] is an object with an @[lfun::``-()], that *! function is called with @[arg1] as argument, and its result is *! returned. *! *! Otherwise the result depends on the argument types: *! @mixed arg1 *! @type int|float *! The result is @expr{@[arg1] - @[arg2]@}, and is a float if *! either @[arg1] or @[arg2] is a float. *! @type string *! The result is @[arg1] with all nonoverlapping occurrences of *! the substring @[arg2] removed. In cases with two overlapping *! occurrences, the leftmost is removed. *! @type array|mapping|multiset *! The result is like @[arg1] but without the elements/indices *! that match any in @[arg2] (according to @[`>], @[`<], @[`==] *! and, in the case of mappings, @[hash_value]). *! @endmixed *! The function is not destructive on the arguments - the result is *! always a new instance. *! *! @note *! In Pike 7.0 and earlier the subtraction order was unspecified. *! *! @note *! If this operator is used with arrays or multisets containing objects *! which implement @[lfun::`==()] but @b{not@} @[lfun::`>()] and *! @[lfun::`<()], the result will be undefined. *! *! @seealso *! @[`+()] */ PMOD_EXPORT void f_minus(INT32 args) { switch(args) { case 0: SIMPLE_WRONG_NUM_ARGS_ERROR("`-", 1); case 1: o_negate(); break; case 2: o_subtract(); break; default: { INT32 e; TYPE_FIELD types = 0; struct svalue *s=Pike_sp-args; for(e=-args;e<0;e++) types |= 1<<TYPEOF(Pike_sp[e]); if ((types | BIT_INT | BIT_FLOAT) == (BIT_INT | BIT_FLOAT)) { INT32 carry = 0; if (types == BIT_INT) { f_add(args-1); o_subtract(); break; } /* Take advantage of the precision control in f_add(). */ for(e = 1; e < args; e++) { if (TYPEOF(s[e]) == PIKE_T_INT) { INT_TYPE val = s[e].u.integer; if (val >= -0x7fffffff) { s[e].u.integer = -val; } else { /* Protect against negative overflow. */ s[e].u.integer = ~val; carry++; } } else { s[e].u.float_number = -s[e].u.float_number; } } if (carry) { push_int(carry); args++; } f_add(args); break; } push_svalue(s); for(e=1;e<args;e++) { push_svalue(s+e); o_subtract(); } assign_svalue(s,Pike_sp-1); pop_n_elems(Pike_sp-s-1); } } } static int generate_minus(node *n) { struct compilation *c = THIS_COMPILATION; switch(count_args(CDR(n))) { case 1: do_docode(CDR(n),DO_NOT_COPY); emit0(F_NEGATE); return 1; case 2: do_docode(CDR(n),DO_NOT_COPY_TOPLEVEL); emit0(F_SUBTRACT); modify_stack_depth(-1); return 1; } return 0; } PMOD_EXPORT void o_and(void) { if(UNLIKELY(TYPEOF(Pike_sp[-1]) != TYPEOF(Pike_sp[-2]))) { if(call_lfun(LFUN_AND, LFUN_RAND)) return; else if (((TYPEOF(Pike_sp[-1]) == T_TYPE) || (TYPEOF(Pike_sp[-1]) == T_PROGRAM) || (TYPEOF(Pike_sp[-1]) == T_FUNCTION)) && ((TYPEOF(Pike_sp[-2]) == T_TYPE) || (TYPEOF(Pike_sp[-2]) == T_PROGRAM) || (TYPEOF(Pike_sp[-2]) == T_FUNCTION))) { if (TYPEOF(Pike_sp[-2]) != T_TYPE) { struct program *p = program_from_svalue(Pike_sp - 2); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`&", 1, "type"); } type_stack_mark(); push_object_type(0, p->id); free_svalue(Pike_sp - 2); SET_SVAL(Pike_sp[-2], T_TYPE, 0, type, pop_unfinished_type()); } if (TYPEOF(Pike_sp[-1]) != T_TYPE) { struct program *p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`&", 2, "type"); } type_stack_mark(); push_object_type(0, p->id); free_svalue(Pike_sp - 1); SET_SVAL(Pike_sp[-1], T_TYPE, 0, type, pop_unfinished_type()); } } else if (TYPEOF(Pike_sp[-2]) == T_MAPPING) switch (TYPEOF(Pike_sp[-1])) { case T_ARRAY: { struct mapping *m; m=merge_mapping_array_unordered(Pike_sp[-2].u.mapping, Pike_sp[-1].u.array, PIKE_ARRAY_OP_AND); pop_n_elems(2); push_mapping(m); return; } case T_MULTISET: { struct mapping *m; int got_cmp_less = !!multiset_get_cmp_less (Pike_sp[-1].u.multiset); struct array *ind = multiset_indices (Pike_sp[-1].u.multiset); pop_stack(); push_array (ind); if (got_cmp_less) m=merge_mapping_array_unordered(Pike_sp[-2].u.mapping, Pike_sp[-1].u.array, PIKE_ARRAY_OP_AND); else m=merge_mapping_array_ordered(Pike_sp[-2].u.mapping, Pike_sp[-1].u.array, PIKE_ARRAY_OP_AND); pop_n_elems(2); push_mapping(m); return; } default: { int args = 2; SIMPLE_ARG_TYPE_ERROR("`&", 2, "mapping"); } } else { int args = 2; SIMPLE_ARG_TYPE_ERROR("`&", 2, get_name_of_type(TYPEOF(Pike_sp[-2]))); } } switch(TYPEOF(Pike_sp[-2])) { case T_OBJECT: if(!call_lfun(LFUN_AND,LFUN_RAND)) PIKE_ERROR("`&", "Bitwise and on objects without `& operator.\n", Pike_sp, 2); return; case T_INT: Pike_sp--; SET_SVAL(Pike_sp[-1], PIKE_T_INT, NUMBER_NUMBER, integer, Pike_sp[-1].u.integer & Pike_sp[0].u.integer); return; case T_MAPPING: { struct mapping *m; m=merge_mappings(Pike_sp[-2].u.mapping, Pike_sp[-1].u.mapping, PIKE_ARRAY_OP_AND); pop_n_elems(2); push_mapping(m); return; } case T_MULTISET: { struct multiset *l; l=merge_multisets(Pike_sp[-2].u.multiset, Pike_sp[-1].u.multiset, PIKE_ARRAY_OP_AND); pop_n_elems(2); push_multiset(l); return; } case T_ARRAY: { struct array *a; a=and_arrays(Pike_sp[-2].u.array, Pike_sp[-1].u.array); pop_n_elems(2); push_array(a); return; } case T_TYPE: { struct pike_type *t; t = intersect_types(Pike_sp[-2].u.type, Pike_sp[-1].u.type, 0, 0, 0); pop_n_elems(2); push_type_value(t); return; } case T_FUNCTION: case T_PROGRAM: { struct program *p; struct pike_type *a; struct pike_type *b; struct pike_type *t; p = program_from_svalue(Pike_sp - 2); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`&", 1, "type"); } type_stack_mark(); push_object_type(0, p->id); a = pop_unfinished_type(); p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`&", 2, "type"); } type_stack_mark(); push_object_type(0, p->id); b = pop_unfinished_type(); t = and_pike_types(a, b); pop_n_elems(2); push_type_value(t); free_type(a); free_type(b); return; } #define STRING_BITOP(OP,STROP) \ case T_STRING: \ { \ struct pike_string *s; \ ptrdiff_t len, i; \ \ len = Pike_sp[-2].u.string->len; \ if (len != Pike_sp[-1].u.string->len) \ PIKE_ERROR("`" #OP, "Bitwise "STROP \ " on strings of different lengths.\n", Pike_sp, 2); \ if(!Pike_sp[-2].u.string->size_shift && !Pike_sp[-1].u.string->size_shift) \ { \ s = begin_shared_string(len); \ for (i=0; i<len; i++) \ s->str[i] = Pike_sp[-2].u.string->str[i] OP Pike_sp[-1].u.string->str[i]; \ }else{ \ s = begin_wide_shared_string(len, \ MAXIMUM(Pike_sp[-2].u.string->size_shift, \ Pike_sp[-1].u.string->size_shift)); \ for (i=0; i<len; i++) \ low_set_index(s,i,index_shared_string(Pike_sp[-2].u.string,i) OP \ index_shared_string(Pike_sp[-1].u.string,i)); \ } \ pop_n_elems(2); \ push_string(end_shared_string(s)); \ return; \ } STRING_BITOP(&,"AND") default: PIKE_ERROR("`&", "Bitwise AND on illegal type.\n", Pike_sp, 2); } } /* This function is used to speed up or/xor/and on * arrays multisets and mappings. This is done by * calling the operator for each pair of arguments * first, then recursively doing the same on the * results until only one value remains. */ static void r_speedup(INT32 args, void (*func)(void)) { struct svalue tmp; ONERROR err; switch(args) { case 3: func(); /* FALLTHRU */ case 2: func(); /* FALLTHRU */ case 1: return; default: r_speedup((args+1)>>1,func); dmalloc_touch_svalue(Pike_sp-1); tmp=*--Pike_sp; SET_ONERROR(err,do_free_svalue,&tmp); r_speedup(args>>1,func); UNSET_ONERROR(err); Pike_sp++[0]=tmp; func(); } } static void speedup(INT32 args, void (*func)(void)) { switch(TYPEOF(Pike_sp[-args])) { /* Binary balanced tree method for types where * a op b may or may not be equal to b op a */ case T_ARRAY: case T_MAPPING: r_speedup(args,func); return; default: while(--args > 0) func(); } } /*! @decl mixed `&(mixed arg1) *! @decl mixed `&(mixed arg1, mixed arg2, mixed ... extras) *! @decl mixed `&(object arg1, mixed arg2) *! @decl mixed `&(mixed arg1, object arg2) *! @decl int `&(int arg1, int arg2) *! @decl string `&(string arg1, string arg2) *! @decl array `&(array arg1, array arg2) *! @decl mapping `&(mapping arg1, mapping arg2) *! @decl mapping `&(mapping arg1, array arg2) *! @decl mapping `&(mapping arg1, multiset arg2) *! @decl multiset `&(multiset arg1, multiset arg2) *! @decl type `&(type|program arg1, type|program arg2) *! *! Bitwise and/intersection. *! *! Every expression with the @expr{&@} operator becomes a call to *! this function, i.e. @expr{a&b@} is the same as *! @expr{predef::`&(a,b)@}. *! *! @returns *! If there's a single argument, that argument is returned. *! *! If there are more than two arguments the result is: *! @expr{`&(`&(@[arg1], @[arg2]), @@@[extras])@}. *! *! Otherwise, if @[arg1] is an object with an @[lfun::`&()], that *! function is called with @[arg2] as argument, and its result is *! returned. *! *! Otherwise, if @[arg2] is an object with an @[lfun::``&()], that *! function is called with @[arg1] as argument, and its result is *! returned. *! *! Otherwise the result depends on the argument types: *! @mixed arg1 *! @type int *! Bitwise and of @[arg1] and @[arg2]. *! @type string *! The result is a string where each character is the bitwise *! and of the characters in the same position in @[arg1] and *! @[arg2]. The arguments must be strings of the same length. *! @type array|mapping|multiset *! The result is like @[arg1] but only with the *! elements/indices that match any in @[arg2] (according to *! @[`>], @[`<], @[`==] and, in the case of mappings, *! @[hash_value]). *! @type type|program *! Type intersection of @[arg1] and @[arg2]. *! @endmixed *! The function is not destructive on the arguments - the result is *! always a new instance. *! *! @note *! If this operator is used with arrays or multisets containing objects *! which implement @[lfun::`==()] but @b{not@} @[lfun::`>()] and *! @[lfun::`<()], the result will be undefined. *! *! @seealso *! @[`|()], @[lfun::`&()], @[lfun::``&()] */ PMOD_EXPORT void f_and(INT32 args) { switch(args) { case 0: SIMPLE_WRONG_NUM_ARGS_ERROR("`&", 1); case 1: return; case 2: o_and(); return; default: speedup(args, o_and); } } static int generate_and(node *n) { struct compilation *c = THIS_COMPILATION; switch(count_args(CDR(n))) { case 1: do_docode(CDR(n),0); return 1; case 2: do_docode(CDR(n),0); emit0(F_AND); modify_stack_depth(-1); return 1; default: return 0; } } PMOD_EXPORT void o_or(void) { if(TYPEOF(Pike_sp[-1]) != TYPEOF(Pike_sp[-2])) { if(call_lfun(LFUN_OR, LFUN_ROR)) { return; } else if (((TYPEOF(Pike_sp[-1]) == T_TYPE) || (TYPEOF(Pike_sp[-1]) == T_PROGRAM) || (TYPEOF(Pike_sp[-1]) == T_FUNCTION)) && ((TYPEOF(Pike_sp[-2]) == T_TYPE) || (TYPEOF(Pike_sp[-2]) == T_PROGRAM) || (TYPEOF(Pike_sp[-2]) == T_FUNCTION))) { if (TYPEOF(Pike_sp[-2]) != T_TYPE) { struct program *p = program_from_svalue(Pike_sp - 2); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`|", 1, "type"); } type_stack_mark(); push_object_type(0, p->id); free_svalue(Pike_sp - 2); SET_SVAL(Pike_sp[-2], T_TYPE, 0, type, pop_unfinished_type()); } if (TYPEOF(Pike_sp[-1]) != T_TYPE) { struct program *p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`|", 2, "type"); } type_stack_mark(); push_object_type(0, p->id); free_svalue(Pike_sp - 1); SET_SVAL(Pike_sp[-1], T_TYPE, 0, type, pop_unfinished_type()); } } else { int args = 2; if ((TYPEOF(Pike_sp[-1]) == PIKE_T_INT) && (SUBTYPEOF(Pike_sp[-1]) == NUMBER_UNDEFINED)) { if (TYPEOF(Pike_sp[-2]) == PIKE_T_MULTISET) { struct multiset *l = copy_multiset(Pike_sp[-2].u.multiset); pop_stack(); pop_stack(); push_multiset(l); return; } } else if ((TYPEOF(Pike_sp[-2]) == PIKE_T_INT) && (SUBTYPEOF(Pike_sp[-2]) == NUMBER_UNDEFINED)) { if (TYPEOF(Pike_sp[-1]) == PIKE_T_MULTISET) { struct multiset *l = copy_multiset(Pike_sp[-1].u.multiset); pop_stack(); pop_stack(); push_multiset(l); return; } } SIMPLE_ARG_TYPE_ERROR("`|", 2, get_name_of_type(TYPEOF(Pike_sp[-2]))); } } switch(TYPEOF(Pike_sp[-2])) { case T_OBJECT: if(!call_lfun(LFUN_OR,LFUN_ROR)) PIKE_ERROR("`|", "Bitwise or on objects without `| operator.\n", Pike_sp, 2); return; case T_INT: Pike_sp--; SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, Pike_sp[-1].u.integer | Pike_sp[0].u.integer); return; case T_MAPPING: { struct mapping *m; m=merge_mappings(Pike_sp[-2].u.mapping, Pike_sp[-1].u.mapping, PIKE_ARRAY_OP_OR); pop_n_elems(2); push_mapping(m); return; } case T_MULTISET: { struct multiset *l; l=merge_multisets(Pike_sp[-2].u.multiset, Pike_sp[-1].u.multiset, PIKE_ARRAY_OP_OR_LEFT); pop_n_elems(2); push_multiset(l); return; } case T_ARRAY: { if (Pike_sp[-1].u.array->size == 1) { /* Common case (typically the |= operator). */ int i = array_search(Pike_sp[-2].u.array, Pike_sp[-1].u.array->item, 0); if (i == -1) { f_add(2); } else { pop_stack(); } } else if ((Pike_sp[-2].u.array == Pike_sp[-1].u.array) && (Pike_sp[-1].u.array->refs == 2)) { /* Not common, but easy to detect... */ pop_stack(); } else { struct array *a; a=merge_array_with_order(Pike_sp[-2].u.array, Pike_sp[-1].u.array, PIKE_ARRAY_OP_OR_LEFT); pop_n_elems(2); push_array(a); } return; } case T_TYPE: { struct pike_type *t; t = or_pike_types(Pike_sp[-2].u.type, Pike_sp[-1].u.type, 0); pop_n_elems(2); push_type_value(t); return; } case T_FUNCTION: case T_PROGRAM: { struct program *p; struct pike_type *a; struct pike_type *b; struct pike_type *t; p = program_from_svalue(Pike_sp - 2); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`|", 1, "type"); } type_stack_mark(); push_object_type(0, p->id); a = pop_unfinished_type(); p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`|", 2, "type"); } type_stack_mark(); push_object_type(0, p->id); b = pop_unfinished_type(); t = or_pike_types(a, b, 0); pop_n_elems(2); push_type_value(t); free_type(a); free_type(b); return; } STRING_BITOP(|,"OR") default: PIKE_ERROR("`|", "Bitwise OR on illegal type.\n", Pike_sp, 2); } } /*! @decl mixed `|(mixed arg1) *! @decl mixed `|(mixed arg1, mixed arg2, mixed ... extras) *! @decl mixed `|(object arg1, mixed arg2) *! @decl mixed `|(mixed arg1, object arg2) *! @decl int `|(int arg1, int arg2) *! @decl string `|(string arg1, string arg2) *! @decl array `|(array arg1, array arg2) *! @decl mapping `|(mapping arg1, mapping arg2) *! @decl multiset `|(multiset arg1, multiset arg2) *! @decl type `|(program|type arg1, program|type arg2) *! *! Bitwise or/union. *! *! Every expression with the @expr{|@} operator becomes a call to *! this function, i.e. @expr{a|b@} is the same as *! @expr{predef::`|(a,b)@}. *! *! @returns *! If there's a single argument, that argument is returned. *! *! If there are more than two arguments, the result is: *! @expr{`|(`|(@[arg1], @[arg2]), @@@[extras])@}. *! *! Otherwise, if @[arg1] is an object with an @[lfun::`|()], that *! function is called with @[arg2] as argument, and its result is *! returned. *! *! Otherwise, if @[arg2] is an object with an @[lfun::``|()], that *! function is called with @[arg1] as argument, and its result is *! returned. *! *! Otherwise the result depends on the argument types: *! @mixed arg1 *! @type int *! Bitwise or of @[arg1] and @[arg2]. *! @type zero *! @[UNDEFINED] may be or:ed with multisets, behaving as if *! it was an empty multiset. *! @type string *! The result is a string where each character is the bitwise *! or of the characters in the same position in @[arg1] and *! @[arg2]. The arguments must be strings of the same length. *! @type array *! The result is an array with the elements in @[arg1] *! concatenated with those in @[arg2] that doesn't occur in *! @[arg1] (according to @[`>], @[`<], @[`==]). The order *! between the elements that come from the same argument is kept. *! *! Every element in @[arg1] is only matched once against an *! element in @[arg2], so if @[arg2] contains several elements *! that are equal to each other and are more than their *! counterparts in @[arg1], the rightmost remaining elements in *! @[arg2] are kept. *! @type mapping *! The result is like @[arg1] but extended with the entries *! from @[arg2]. If the same index (according to @[hash_value] *! and @[`==]) occur in both, the value from @[arg2] is used. *! @type multiset *! The result is like @[arg1] but extended with the entries in *! @[arg2] that don't already occur in @[arg1] (according to *! @[`>], @[`<] and @[`==]). Subsequences with orderwise equal *! entries (i.e. where @[`<] returns false) are handled just *! like the array case above. *! @type type|program *! Type union of @[arg1] and @[arg2]. *! @endmixed *! The function is not destructive on the arguments - the result is *! always a new instance. *! *! @note *! If this operator is used with arrays or multisets containing objects *! which implement @[lfun::`==()] but @b{not@} @[lfun::`>()] and *! @[lfun::`<()], the result will be undefined. *! *! The treatment of @[UNDEFINED] with multisets was new in Pike 8.1. *! *! @seealso *! @[`&()], @[lfun::`|()], @[lfun::``|()] */ PMOD_EXPORT void f_or(INT32 args) { switch(args) { case 0: SIMPLE_WRONG_NUM_ARGS_ERROR("`|", 1); case 1: return; case 2: o_or(); return; default: speedup(args, o_or); } } static int generate_or(node *n) { struct compilation *c = THIS_COMPILATION; switch(count_args(CDR(n))) { case 1: do_docode(CDR(n),0); return 1; case 2: do_docode(CDR(n),0); emit0(F_OR); modify_stack_depth(-1); return 1; default: return 0; } } PMOD_EXPORT void o_xor(void) { if(TYPEOF(Pike_sp[-1]) != TYPEOF(Pike_sp[-2])) { if(call_lfun(LFUN_XOR, LFUN_RXOR)) { return; } else if (((TYPEOF(Pike_sp[-1]) == T_TYPE) || (TYPEOF(Pike_sp[-1]) == T_PROGRAM) || (TYPEOF(Pike_sp[-1]) == T_FUNCTION)) && ((TYPEOF(Pike_sp[-2]) == T_TYPE) || (TYPEOF(Pike_sp[-2]) == T_PROGRAM) || (TYPEOF(Pike_sp[-2]) == T_FUNCTION))) { if (TYPEOF(Pike_sp[-2]) != T_TYPE) { struct program *p = program_from_svalue(Pike_sp - 2); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`^", 1, "type"); } type_stack_mark(); push_object_type(0, p->id); free_svalue(Pike_sp - 2); SET_SVAL(Pike_sp[-2], T_TYPE, 0, type, pop_unfinished_type()); } if (TYPEOF(Pike_sp[-1]) != T_TYPE) { struct program *p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`^", 2, "type"); } type_stack_mark(); push_object_type(0, p->id); free_svalue(Pike_sp - 1); SET_SVAL(Pike_sp[-1], T_TYPE, 0, type, pop_unfinished_type()); } } else { int args = 2; SIMPLE_ARG_TYPE_ERROR("`^", 2, get_name_of_type(TYPEOF(Pike_sp[-2]))); } } switch(TYPEOF(Pike_sp[-2])) { case T_OBJECT: if(!call_lfun(LFUN_XOR,LFUN_RXOR)) PIKE_ERROR("`^", "Bitwise xor on objects without `^ operator.\n", Pike_sp, 2); return; case T_INT: Pike_sp--; SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, Pike_sp[-1].u.integer ^ Pike_sp[0].u.integer); return; case T_MAPPING: { struct mapping *m; m=merge_mappings(Pike_sp[-2].u.mapping, Pike_sp[-1].u.mapping, PIKE_ARRAY_OP_XOR); pop_n_elems(2); push_mapping(m); return; } case T_MULTISET: { struct multiset *l; l=merge_multisets(Pike_sp[-2].u.multiset, Pike_sp[-1].u.multiset, PIKE_ARRAY_OP_XOR); pop_n_elems(2); push_multiset(l); return; } case T_ARRAY: { struct array *a; a=merge_array_with_order(Pike_sp[-2].u.array, Pike_sp[-1].u.array, PIKE_ARRAY_OP_XOR); pop_n_elems(2); push_array(a); return; } case T_FUNCTION: case T_PROGRAM: { struct program *p; p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; SIMPLE_ARG_TYPE_ERROR("`^", 2, "type"); } type_stack_mark(); push_object_type(0, p->id); pop_stack(); push_type_value(pop_unfinished_type()); stack_swap(); p = program_from_svalue(Pike_sp - 1); if (!p) { int args = 2; stack_swap(); SIMPLE_ARG_TYPE_ERROR("`^", 1, "type"); } type_stack_mark(); push_object_type(0, p->id); pop_stack(); push_type_value(pop_unfinished_type()); } /* FALLTHRU */ case T_TYPE: { /* a ^ b == (a&~b)|(~a&b) */ struct pike_type *a; struct pike_type *b; copy_pike_type(a, Pike_sp[-2].u.type); copy_pike_type(b, Pike_sp[-1].u.type); o_compl(); /* ~b */ o_and(); /* a&~b */ push_type_value(a); o_compl(); /* ~a */ push_type_value(b); o_and(); /* ~a&b */ o_or(); /* (a&~b)|(~a&b) */ return; } STRING_BITOP(^,"XOR") default: PIKE_ERROR("`^", "Bitwise XOR on illegal type.\n", Pike_sp, 2); } } /*! @decl mixed `^(mixed arg1) *! @decl mixed `^(mixed arg1, mixed arg2, mixed ... extras) *! @decl mixed `^(object arg1, mixed arg2) *! @decl mixed `^(mixed arg1, object arg2) *! @decl int `^(int arg1, int arg2) *! @decl string `^(string arg1, string arg2) *! @decl array `^(array arg1, array arg2) *! @decl mapping `^(mapping arg1, mapping arg2) *! @decl multiset `^(multiset arg1, multiset arg2) *! @decl type `^(program|type arg1, program|type arg2) *! *! Exclusive or. *! *! Every expression with the @expr{^@} operator becomes a call to *! this function, i.e. @expr{a^b@} is the same as *! @expr{predef::`^(a,b)@}. *! *! @returns *! If there's a single argument, that argument is returned. *! *! If there are more than two arguments, the result is: *! @expr{`^(`^(@[arg1], @[arg2]), @@@[extras])@}. *! *! Otherwise, if @[arg1] is an object with an @[lfun::`^()], that *! function is called with @[arg2] as argument, and its result is *! returned. *! *! Otherwise, if @[arg2] is an object with an @[lfun::``^()], that *! function is called with @[arg1] as argument, and its result is *! returned. *! *! Otherwise the result depends on the argument types: *! @mixed arg1 *! @type int *! Bitwise exclusive or of @[arg1] and @[arg2]. *! @type string *! The result is a string where each character is the bitwise *! exclusive or of the characters in the same position in *! @[arg1] and @[arg2]. The arguments must be strings of the *! same length. *! @type array *! The result is an array with the elements in @[arg1] that *! doesn't occur in @[arg2] concatenated with those in @[arg2] *! that doesn't occur in @[arg1] (according to @[`>], @[`<] and *! @[`==]). The order between the elements that come from the *! same argument is kept. *! *! Every element is only matched once against an element in the *! other array, so if one contains several elements that are *! equal to each other and are more than their counterparts in *! the other array, the rightmost remaining elements are kept. *! @type mapping *! The result is like @[arg1] but with the entries from @[arg1] *! and @[arg2] whose indices are different between them *! (according to @[hash_value] and @[`==]). *! @type multiset *! The result is like @[arg1] but with the entries from @[arg1] *! and @[arg2] that are different between them (according to *! @[`>], @[`<] and @[`==]). Subsequences with orderwise equal *! entries (i.e. where @[`<] returns false) are handled just *! like the array case above. *! @type type|program *! The result is a type computed like this: *! @expr{(@[arg1]&~@[arg2])|(~@[arg1]&@[arg2])@}. *! @endmixed *! The function is not destructive on the arguments - the result is *! always a new instance. *! *! @note *! If this operator is used with arrays or multisets containing objects *! which implement @[lfun::`==()] but @b{not@} @[lfun::`>()] and *! @[lfun::`<()], the result will be undefined. *! *! @seealso *! @[`&()], @[`|()], @[lfun::`^()], @[lfun::``^()] */ PMOD_EXPORT void f_xor(INT32 args) { switch(args) { case 0: SIMPLE_WRONG_NUM_ARGS_ERROR("`^", 1); case 1: return; case 2: o_xor(); return; default: speedup(args, o_xor); } } static int generate_xor(node *n) { struct compilation *c = THIS_COMPILATION; switch(count_args(CDR(n))) { case 1: do_docode(CDR(n),0); return 1; case 2: do_docode(CDR(n),0); emit0(F_XOR); modify_stack_depth(-1); return 1; default: return 0; } } PMOD_EXPORT void o_lsh(void) { int args = 2; if ((TYPEOF(Pike_sp[-2]) == T_OBJECT) || (TYPEOF(Pike_sp[-1]) == T_OBJECT)) goto call_lfun; if ((TYPEOF(Pike_sp[-1]) != T_INT) || (Pike_sp[-1].u.integer < 0)) { SIMPLE_ARG_TYPE_ERROR("`<<", 2, "int(0..)|object"); } switch(TYPEOF(Pike_sp[-2])) { case T_INT: if (!INT_TYPE_LSH_OVERFLOW(Pike_sp[-2].u.integer, Pike_sp[-1].u.integer)) break; convert_stack_top_to_bignum(); /* FALLTHRU */ case T_OBJECT: call_lfun: if(call_lfun(LFUN_LSH, LFUN_RLSH)) return; if(TYPEOF(Pike_sp[-2]) != T_INT) SIMPLE_ARG_TYPE_ERROR("`<<", 1, "int|float|object"); SIMPLE_ARG_TYPE_ERROR("`<<", 2, "int(0..)|object"); break; case T_FLOAT: Pike_sp--; Pike_sp[-1].u.float_number = ldexp(Pike_sp[-1].u.float_number, Pike_sp->u.integer); return; default: SIMPLE_ARG_TYPE_ERROR("`<<", 1, "int|float|object"); break; } Pike_sp--; SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, Pike_sp[-1].u.integer << Pike_sp->u.integer); } /*! @decl int `<<(int arg1, int(0..) arg2) *! @decl mixed `<<(object arg1, int(0..)|object arg2) *! @decl mixed `<<(int arg1, object arg2) *! @decl mixed `<<(float arg1, int(0..) arg2) *! *! Left shift. *! *! Every expression with the @expr{<<@} operator becomes a call to *! this function, i.e. @expr{a<<b@} is the same as *! @expr{predef::`<<(a,b)@}. *! *! If @[arg1] is an object that implements @[lfun::`<<()], that *! function will be called with @[arg2] as the single argument. *! *! If @[arg2] is an object that implements @[lfun::``<<()], that *! function will be called with @[arg1] as the single argument. *! *! If @[arg1] is a float and @[arg2] is a non-negative integer, *! @[arg1] will be multiplied by @expr{1<<@[arg2]@}. *! *! Otherwise @[arg1] will be shifted @[arg2] bits left. *! *! @seealso *! @[`>>()] */ PMOD_EXPORT void f_lsh(INT32 args) { if(args != 2) SIMPLE_WRONG_NUM_ARGS_ERROR("`<<", 2); o_lsh(); } static int generate_lsh(node *n) { struct compilation *c = THIS_COMPILATION; if(count_args(CDR(n))==2) { do_docode(CDR(n),DO_NOT_COPY_TOPLEVEL); emit0(F_LSH); modify_stack_depth(-1); return 1; } return 0; } PMOD_EXPORT void o_rsh(void) { int args = 2; if ((TYPEOF(Pike_sp[-2]) == T_OBJECT) || (TYPEOF(Pike_sp[-1]) == T_OBJECT)) { if(call_lfun(LFUN_RSH, LFUN_RRSH)) return; if(TYPEOF(Pike_sp[-2]) != T_INT) SIMPLE_ARG_TYPE_ERROR("`>>", 1, "int|object"); SIMPLE_ARG_TYPE_ERROR("`>>", 2, "int(0..)|object"); } if ((TYPEOF(Pike_sp[-1]) != T_INT) || (Pike_sp[-1].u.integer < 0)) { SIMPLE_ARG_TYPE_ERROR("`>>", 2, "int(0..)|object"); } Pike_sp--; switch(TYPEOF(Pike_sp[-1])) { case T_INT: if( INT_TYPE_RSH_OVERFLOW(Pike_sp[-1].u.integer, Pike_sp->u.integer) ) { if (Pike_sp[-1].u.integer < 0) { SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, -1); } else { SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, 0); } return; } break; case T_FLOAT: Pike_sp[-1].u.float_number = ldexp(Pike_sp[-1].u.float_number, -Pike_sp->u.integer); return; default: SIMPLE_ARG_TYPE_ERROR("`>>", 1, "int|float|object"); break; } SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, Pike_sp[-1].u.integer >> Pike_sp->u.integer); } /*! @decl int `>>(int arg1, int(0..) arg2) *! @decl mixed `>>(object arg1, int(0..)|object arg2) *! @decl mixed `>>(int arg1, object arg2) *! @decl float `>>(float arg1, int(0..) arg2) *! *! Right shift. *! *! Every expression with the @expr{>>@} operator becomes a call to *! this function, i.e. @expr{a>>b@} is the same as *! @expr{predef::`>>(a,b)@}. *! *! If @[arg1] is an object that implements @[lfun::`>>()], that *! function will be called with @[arg2] as the single argument. *! *! If @[arg2] is an object that implements @[lfun::``>>()], that *! function will be called with @[arg1] as the single argument. *! *! If @[arg1] is a float and @[arg2] is a non-negative integer, *! @[arg1] will be divided by @expr{1<<@[arg2]@}. *! *! Otherwise @[arg1] will be shifted @[arg2] bits right. *! *! @seealso *! @[`<<()] */ PMOD_EXPORT void f_rsh(INT32 args) { if(args != 2) SIMPLE_WRONG_NUM_ARGS_ERROR("`>>", 2); o_rsh(); } static int generate_rsh(node *n) { if(count_args(CDR(n))==2) { struct compilation *c = THIS_COMPILATION; do_docode(CDR(n),DO_NOT_COPY); emit0(F_RSH); modify_stack_depth(-1); return 1; } return 0; } #define TWO_TYPES(X,Y) (((X)<<8)|(Y)) PMOD_EXPORT void o_multiply(void) { int args = 2; switch(TWO_TYPES(TYPEOF(Pike_sp[-2]), TYPEOF(Pike_sp[-1]))) { case TWO_TYPES(T_ARRAY, T_INT): { struct array *ret; struct svalue *pos; INT32 e; if(Pike_sp[-1].u.integer < 0) SIMPLE_ARG_TYPE_ERROR("`*", 2, "int(0..)"); ret=allocate_array(Pike_sp[-2].u.array->size * Pike_sp[-1].u.integer); pos=ret->item; for(e=0;e<Pike_sp[-1].u.integer;e++,pos+=Pike_sp[-2].u.array->size) assign_svalues_no_free(pos, Pike_sp[-2].u.array->item, Pike_sp[-2].u.array->size, Pike_sp[-2].u.array->type_field); ret->type_field=Pike_sp[-2].u.array->type_field; pop_n_elems(2); push_array(ret); return; } case TWO_TYPES(T_ARRAY, T_FLOAT): { struct array *src; struct array *ret; struct svalue *pos; ptrdiff_t asize, delta; if(Pike_sp[-1].u.float_number < 0) SIMPLE_ARG_TYPE_ERROR("`*", 2, "float(0..)"); src = Pike_sp[-2].u.array; delta = src->size; asize = (ptrdiff_t)floor(delta * Pike_sp[-1].u.float_number + 0.5); ret = allocate_array(asize); pos = ret->item; if (asize > delta) { ret->type_field = src->type_field; assign_svalues_no_free(pos, src->item, delta, src->type_field); pos += delta; asize -= delta; while (asize > delta) { assign_svalues_no_free(pos, ret->item, delta, ret->type_field); pos += delta; asize -= delta; delta <<= 1; } if (asize) { assign_svalues_no_free(pos, ret->item, asize, ret->type_field); } } else if (asize) { ret->type_field = assign_svalues_no_free(pos, src->item, asize, src->type_field); } pop_n_elems(2); push_array(ret); return; } case TWO_TYPES(T_STRING, T_FLOAT): { struct pike_string *src; struct pike_string *ret; char *pos; ptrdiff_t len, delta; if(Pike_sp[-1].u.float_number < 0) SIMPLE_ARG_TYPE_ERROR("`*", 2, "float(0..)"); src = Pike_sp[-2].u.string; len = (ptrdiff_t)floor(src->len * Pike_sp[-1].u.float_number + 0.5); ret = begin_wide_shared_string(len, src->size_shift); len <<= src->size_shift; delta = src->len << src->size_shift; pos = ret->str; if (len > delta) { memcpy(pos, src->str, delta); pos += delta; len -= delta; while (len > delta) { memcpy(pos, ret->str, delta); pos += delta; len -= delta; delta <<= 1; } if (len) { memcpy(pos, ret->str, len); } } else if (len) { memcpy(pos, src->str, len); } pop_n_elems(2); push_string(low_end_shared_string(ret)); return; } case TWO_TYPES(T_STRING, T_INT): { struct pike_string *ret; char *pos; INT_TYPE e; ptrdiff_t len; if(Pike_sp[-1].u.integer < 0) SIMPLE_ARG_TYPE_ERROR("`*", 2, "int(0..)"); ret=begin_wide_shared_string(Pike_sp[-2].u.string->len * Pike_sp[-1].u.integer, Pike_sp[-2].u.string->size_shift); pos=ret->str; len=Pike_sp[-2].u.string->len << Pike_sp[-2].u.string->size_shift; for(e=0;e<Pike_sp[-1].u.integer;e++,pos+=len) memcpy(pos,Pike_sp[-2].u.string->str,len); pop_n_elems(2); push_string(low_end_shared_string(ret)); return; } case TWO_TYPES(T_ARRAY,T_STRING): { struct pike_string *ret; ret=implode(Pike_sp[-2].u.array,Pike_sp[-1].u.string); free_string(Pike_sp[-1].u.string); free_array(Pike_sp[-2].u.array); SET_SVAL(Pike_sp[-2], T_STRING, 0, string, ret); Pike_sp--; return; } case TWO_TYPES(T_ARRAY,T_ARRAY): { struct array *ret; ret=implode_array(Pike_sp[-2].u.array, Pike_sp[-1].u.array); pop_n_elems(2); push_array(ret); return; } case TWO_TYPES(T_FLOAT,T_FLOAT): Pike_sp--; Pike_sp[-1].u.float_number *= Pike_sp[0].u.float_number; return; case TWO_TYPES(T_FLOAT,T_INT): Pike_sp--; Pike_sp[-1].u.float_number *= (FLOAT_TYPE)Pike_sp[0].u.integer; return; case TWO_TYPES(T_INT,T_FLOAT): Pike_sp--; Pike_sp[-1].u.float_number= (FLOAT_TYPE) Pike_sp[-1].u.integer * Pike_sp[0].u.float_number; SET_SVAL_TYPE(Pike_sp[-1], T_FLOAT); return; case TWO_TYPES(T_INT,T_INT): { INT_TYPE res; if (DO_INT_TYPE_MUL_OVERFLOW(Pike_sp[-2].u.integer, Pike_sp[-1].u.integer, &res)) { convert_stack_top_to_bignum(); goto do_lfun_multiply; } Pike_sp--; SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, res); return; } default: do_lfun_multiply: if(!call_lfun(LFUN_MULTIPLY, LFUN_RMULTIPLY)) PIKE_ERROR("`*", "Multiplication on objects without `* operator.\n", Pike_sp, 2); return; } } /*! @decl object|int|float `**(object|int|float arg1, object|int|float arg2) *! *! Exponentiation. Raise arg1 to the power of arg2. *! */ PMOD_EXPORT void f_exponent(INT32 args) { FLOAT_ARG_TYPE a, b; if(args != 2 ) SIMPLE_WRONG_NUM_ARGS_ERROR("`**",2); switch( TWO_TYPES(TYPEOF(Pike_sp[-2]), TYPEOF(Pike_sp[-1])) ) { case TWO_TYPES(T_FLOAT,T_FLOAT): a = Pike_sp[-2].u.float_number; b = Pike_sp[-1].u.float_number; goto res_is_powf; case TWO_TYPES(T_FLOAT,T_INT): a = Pike_sp[-2].u.float_number; b = (FLOAT_ARG_TYPE)Pike_sp[-1].u.integer; goto res_is_powf; case TWO_TYPES(T_INT,T_FLOAT): a = (FLOAT_ARG_TYPE)Pike_sp[-2].u.integer; b = (FLOAT_ARG_TYPE)Pike_sp[-1].u.float_number; res_is_powf: { Pike_sp-=2; #if SIZEOF_FLOAT_TYPE > SIZEOF_DOUBLE push_float( powl( a, b ) ); #else push_float( pow( a, b ) ); #endif return; } default: stack_swap(); convert_stack_top_to_bignum(); stack_swap(); /* FALLTHRU *//* again (this is the slow path).. */ case TWO_TYPES(T_OBJECT,T_INT): case TWO_TYPES(T_OBJECT,T_FLOAT): case TWO_TYPES(T_OBJECT,T_OBJECT): case TWO_TYPES(T_INT,T_OBJECT): case TWO_TYPES(T_FLOAT,T_OBJECT): if( !call_lfun( LFUN_POW, LFUN_RPOW ) ) { if( TYPEOF(Pike_sp[-2]) != PIKE_T_OBJECT ) { stack_swap(); convert_stack_top_to_bignum(); stack_swap(); if( call_lfun( LFUN_POW, LFUN_RPOW ) ) return; } Pike_error("Illegal argument 1 to `** (object missing implementation of `**).\n"); } return; } } /*! @decl mixed `*(mixed arg1) *! @decl mixed `*(object arg1, mixed arg2, mixed ... extras) *! @decl mixed `*(mixed arg1, object arg2) *! @decl array `*(array arg1, int arg2) *! @decl array `*(array arg1, float arg2) *! @decl string `*(string arg1, int arg2) *! @decl string `*(string arg1, float arg2) *! @decl string `*(array(string) arg1, string arg2) *! @decl array `*(array(array) arg1, array arg2) *! @decl float `*(float arg1, int|float arg2) *! @decl float `*(int arg1, float arg2) *! @decl int `*(int arg1, int arg2) *! @decl mixed `*(mixed arg1, mixed arg2, mixed ... extras) *! *! Multiplication/repetition/implosion. *! *! Every expression with the @expr{*@} operator becomes a call to *! this function, i.e. @expr{a*b@} is the same as *! @expr{predef::`*(a,b)@}. Longer @expr{*@} expressions are *! normally optimized to one call, so e.g. @expr{a*b*c@} becomes *! @expr{predef::`*(a,b,c)@}. *! *! @returns *! If there's a single argument, that argument will be returned. *! *! If the first argument is an object that implements @[lfun::`*()], *! that function will be called with the rest of the arguments. *! *! If there are more than two arguments, the result will be *! @expr{`*(`*(@[arg1], @[arg2]), @@@[extras])@}. *! *! If @[arg2] is an object that implements @[lfun::``*()], that *! function will be called with @[arg1] as the single argument. *! *! Otherwise the result will be as follows: *! @mixed arg1 *! @type array *! @mixed arg2 *! @type int|float *! The result will be @[arg1] concatenated @[arg2] times. *! @type string|array *! The result will be the elements of @[arg1] concatenated with *! @[arg2] interspersed. *! @endmixed *! @type string *! The result will be @[arg1] concatenated @[arg2] times. *! @type int|float *! The result will be @expr{@[arg1] * @[arg2]@}, and will be a *! float if either @[arg1] or @[arg2] is a float. *! @endmixed *! *! @note *! In Pike 7.0 and earlier the multiplication order was unspecified. *! *! @seealso *! @[`+()], @[`-()], @[`/()], @[lfun::`*()], @[lfun::``*()] */ PMOD_EXPORT void f_multiply(INT32 args) { switch(args) { case 0: SIMPLE_WRONG_NUM_ARGS_ERROR("`*", 1); case 1: return; case 2: o_multiply(); return; default: { INT32 i = -args, j = -1; /* Reverse the arguments */ while(i < j) { struct svalue tmp = Pike_sp[i]; Pike_sp[i++] = Pike_sp[j]; Pike_sp[j--] = tmp; } while(--args > 0) { /* Restore the order, and multiply */ stack_swap(); o_multiply(); } } } } static int generate_multiply(node *n) { struct compilation *c = THIS_COMPILATION; switch(count_args(CDR(n))) { case 1: do_docode(CDR(n),0); return 1; case 2: do_docode(CDR(n),0); emit0(F_MULTIPLY); modify_stack_depth(-1); return 1; default: return 0; } } PMOD_EXPORT void o_divide(void) { if(TYPEOF(Pike_sp[-2]) != TYPEOF(Pike_sp[-1]) && !float_promote()) { if(call_lfun(LFUN_DIVIDE, LFUN_RDIVIDE)) return; switch(TWO_TYPES(TYPEOF(Pike_sp[-2]), TYPEOF(Pike_sp[-1]))) { case TWO_TYPES(T_STRING,T_INT): { struct array *a; INT_TYPE len; ptrdiff_t size,e,pos=0; len=Pike_sp[-1].u.integer; if(!len) OP_DIVISION_BY_ZERO_ERROR("`/"); if(len<0) { len=-len; size=Pike_sp[-2].u.string->len / len; pos+=Pike_sp[-2].u.string->len % len; }else{ size=Pike_sp[-2].u.string->len / len; } a=allocate_array(size); for(e=0;e<size;e++) { SET_SVAL(a->item[e], T_STRING, 0, string, string_slice(Pike_sp[-2].u.string, pos,len)); pos+=len; } a->type_field=BIT_STRING; pop_n_elems(2); push_array(a); return; } case TWO_TYPES(T_STRING,T_FLOAT): { struct array *a; ptrdiff_t size, pos, last, e; FLOAT_ARG_TYPE len; len=Pike_sp[-1].u.float_number; if(len==0.0) OP_DIVISION_BY_ZERO_ERROR("`/"); if(len<0) { len=-len; size=(ptrdiff_t)ceil( ((double)Pike_sp[-2].u.string->len) / len); a=allocate_array(size); for(last=Pike_sp[-2].u.string->len,e=0;e<size-1;e++) { pos=Pike_sp[-2].u.string->len - (ptrdiff_t)((e+1)*len+0.5); SET_SVAL(a->item[size-1-e], T_STRING, 0, string, string_slice(Pike_sp[-2].u.string, pos, last-pos)); last=pos; } pos=0; SET_SVAL(a->item[0], T_STRING, 0, string, string_slice(Pike_sp[-2].u.string, pos, last-pos)); }else{ size=(ptrdiff_t)ceil( ((double)Pike_sp[-2].u.string->len) / len); a=allocate_array(size); for(last=0,e=0;e<size-1;e++) { pos = (ptrdiff_t)((e+1)*len+0.5); SET_SVAL(a->item[e], T_STRING, 0, string, string_slice(Pike_sp[-2].u.string, last, pos-last)); last=pos; } pos=Pike_sp[-2].u.string->len; SET_SVAL(a->item[e], T_STRING, 0, string, string_slice(Pike_sp[-2].u.string, last, pos-last)); } a->type_field=BIT_STRING; pop_n_elems(2); push_array(a); return; } case TWO_TYPES(T_ARRAY, T_INT): { struct array *a; ptrdiff_t size,e,pos; INT_TYPE len=Pike_sp[-1].u.integer; if(!len) OP_DIVISION_BY_ZERO_ERROR("`/"); if (!Pike_sp[-2].u.array->size) { pop_n_elems (2); ref_push_array (&empty_array); return; } if(len<0) { len = -len; pos = Pike_sp[-2].u.array->size % len; }else{ pos = 0; } size = Pike_sp[-2].u.array->size / len; a=allocate_array(size); for(e=0;e<size;e++) { SET_SVAL(a->item[e], T_ARRAY, 0, array, friendly_slice_array(Pike_sp[-2].u.array, pos, pos+len)); pos+=len; } a->type_field=BIT_ARRAY; pop_n_elems(2); push_array(a); return; } case TWO_TYPES(T_ARRAY,T_FLOAT): { struct array *a; ptrdiff_t last,pos,e,size; FLOAT_ARG_TYPE len; len=Pike_sp[-1].u.float_number; if(len==0.0) OP_DIVISION_BY_ZERO_ERROR("`/"); if (!Pike_sp[-2].u.array->size) { pop_n_elems (2); ref_push_array (&empty_array); return; } if(len<0) { len=-len; size = (ptrdiff_t)ceil( ((double)Pike_sp[-2].u.array->size) / len); a=allocate_array(size); for(last=Pike_sp[-2].u.array->size,e=0;e<size-1;e++) { pos=Pike_sp[-2].u.array->size - (ptrdiff_t)((e+1)*len+0.5); SET_SVAL(a->item[size-1-e], T_ARRAY, 0, array, friendly_slice_array(Pike_sp[-2].u.array, pos, last)); last=pos; } SET_SVAL(a->item[0], T_ARRAY, 0, array, slice_array(Pike_sp[-2].u.array, 0, last)); }else{ size = (ptrdiff_t)ceil( ((double)Pike_sp[-2].u.array->size) / len); a=allocate_array(size); for(last=0,e=0;e<size-1;e++) { pos = (ptrdiff_t)((e+1)*len+0.5); SET_SVAL(a->item[e], T_ARRAY, 0, array, friendly_slice_array(Pike_sp[-2].u.array, last, pos)); last=pos; } SET_SVAL(a->item[e], T_ARRAY, 0, array, slice_array(Pike_sp[-2].u.array, last, Pike_sp[-2].u.array->size)); } a->type_field=BIT_ARRAY; pop_n_elems(2); push_array(a); return; } } PIKE_ERROR("`/", "Division on different types.\n", Pike_sp, 2); } switch(TYPEOF(Pike_sp[-2])) { case T_OBJECT: if(!call_lfun(LFUN_DIVIDE,LFUN_RDIVIDE)) PIKE_ERROR("`/", "Division on objects without `/ operator.\n", Pike_sp, 2); return; case T_STRING: { struct array *ret; ret=explode(Pike_sp[-2].u.string,Pike_sp[-1].u.string); free_string(Pike_sp[-2].u.string); free_string(Pike_sp[-1].u.string); SET_SVAL(Pike_sp[-2], T_ARRAY, 0, array, ret); Pike_sp--; return; } case T_ARRAY: { struct array *ret=explode_array(Pike_sp[-2].u.array, Pike_sp[-1].u.array); pop_n_elems(2); push_array(ret); return; } case T_FLOAT: if(Pike_sp[-1].u.float_number == 0.0) OP_DIVISION_BY_ZERO_ERROR("`/"); Pike_sp--; Pike_sp[-1].u.float_number /= Pike_sp[0].u.float_number; return; case T_INT: { INT_TYPE tmp; if (Pike_sp[-1].u.integer == 0) OP_DIVISION_BY_ZERO_ERROR("`/"); if(INT_TYPE_DIV_OVERFLOW(Pike_sp[-2].u.integer, Pike_sp[-1].u.integer)) { stack_swap(); convert_stack_top_to_bignum(); stack_swap(); if (LIKELY(call_lfun(LFUN_DIVIDE,LFUN_RDIVIDE))) { return; } Pike_fatal("Failed to call `/() in bignum.\n"); } else tmp = Pike_sp[-2].u.integer/Pike_sp[-1].u.integer; Pike_sp--; /* What is this trying to solve? /Noring */ /* It fixes rounding towards negative infinity. /mast */ if((Pike_sp[-1].u.integer<0) != (Pike_sp[0].u.integer<0)) if(tmp*Pike_sp[0].u.integer!=Pike_sp[-1].u.integer) tmp--; SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, tmp); return; } default: PIKE_ERROR("`/", "Bad argument 1.\n", Pike_sp, 2); } } /*! @decl mixed `/(object arg1, mixed arg2) *! @decl mixed `/(mixed arg1, object arg2) *! @decl array(string) `/(string arg1, int arg2) *! @decl array(string) `/(string arg1, float arg2) *! @decl array(array) `/(array arg1, int arg2) *! @decl array(array) `/(array arg1, float arg2) *! @decl array(string) `/(string arg1, string arg2) *! @decl array(array) `/(array arg1, array arg2) *! @decl float `/(float arg1, int|float arg2) *! @decl float `/(int arg1, float arg2) *! @decl int `/(int arg1, int arg2) *! @decl mixed `/(mixed arg1, mixed arg2, mixed ... extras) *! *! Division/split. *! *! Every expression with the @expr{/@} operator becomes a call to *! this function, i.e. @expr{a/b@} is the same as *! @expr{predef::`/(a,b)@}. *! *! @returns *! If there are more than two arguments, the result will be *! @expr{`/(`/(@[arg1], @[arg2]), @@@[extras])@}. *! *! If @[arg1] is an object that implements @[lfun::`/()], that *! function will be called with @[arg2] as the single argument. *! *! If @[arg2] is an object that implements @[lfun::``/()], that *! function will be called with @[arg1] as the single argument. *! *! Otherwise the result will be as follows: *! @mixed arg1 *! @type string *! @mixed arg2 *! @type int|float *! The result will be and array of @[arg1] split in segments *! of length @[arg2]. If @[arg2] is negative the splitting *! will start from the end of @[arg1]. *! @type string *! The result will be an array of @[arg1] split at each *! occurrence of @[arg2]. Note that the segments that *! matched against @[arg2] will not be in the result. *! @endmixed *! @type array *! @mixed arg2 *! @type int|float *! The result will be and array of @[arg1] split in segments *! of length @[arg2]. If @[arg2] is negative the splitting *! will start from the end of @[arg1]. *! @type array *! The result will be an array of @[arg1] split at each *! occurrence of @[arg2]. Note that the elements that *! matched against @[arg2] will not be in the result. *! @endmixed *! @type float|int *! The result will be @expr{@[arg1] / @[arg2]@}. If both arguments *! are int, the result will be truncated to an int. Otherwise the *! result will be a float. *! @endmixed *! @note *! Unlike in some languages, the function f(x) = x/n (x and n integers) *! behaves in a well-defined way and is always rounded down. When you *! increase x, f(x) will increase with one for each n:th increment. For *! all x, (x + n) / n = x/n + 1; crossing *! zero is not special. This also means that / and % are compatible, so *! that a = b*(a/b) + a%b for all a and b. *! @seealso *! @[`%] */ PMOD_EXPORT void f_divide(INT32 args) { switch(args) { case 0: case 1: SIMPLE_WRONG_NUM_ARGS_ERROR("`/", 2); case 2: o_divide(); break; default: { INT32 e; struct svalue *s=Pike_sp-args; push_svalue(s); for(e=1;e<args;e++) { push_svalue(s+e); o_divide(); } assign_svalue(s,Pike_sp-1); pop_n_elems(Pike_sp-s-1); } } } static int generate_divide(node *n) { if(count_args(CDR(n))==2) { struct compilation *c = THIS_COMPILATION; do_docode(CDR(n),DO_NOT_COPY_TOPLEVEL); emit0(F_DIVIDE); modify_stack_depth(-1); return 1; } return 0; } PMOD_EXPORT void o_mod(void) { if(TYPEOF(Pike_sp[-2]) != TYPEOF(Pike_sp[-1]) && !float_promote()) { do_lfun_modulo: if(call_lfun(LFUN_MOD, LFUN_RMOD)) return; switch(TWO_TYPES(TYPEOF(Pike_sp[-2]), TYPEOF(Pike_sp[-1]))) { case TWO_TYPES(T_STRING,T_INT): { struct pike_string *s=Pike_sp[-2].u.string; ptrdiff_t tmp,base; if(!Pike_sp[-1].u.integer) OP_MODULO_BY_ZERO_ERROR("`%"); if(Pike_sp[-1].u.integer<0) { tmp=s->len % -Pike_sp[-1].u.integer; base=0; }else{ tmp=s->len % Pike_sp[-1].u.integer; base=s->len - tmp; } s=string_slice(s, base, tmp); pop_n_elems(2); push_string(s); return; } case TWO_TYPES(T_ARRAY,T_INT): { struct array *a=Pike_sp[-2].u.array; ptrdiff_t tmp,base; if(!Pike_sp[-1].u.integer) OP_MODULO_BY_ZERO_ERROR("`%"); if(Pike_sp[-1].u.integer<0) { tmp=a->size % -Pike_sp[-1].u.integer; base=0; }else{ tmp=a->size % Pike_sp[-1].u.integer; base=a->size - tmp; } a=slice_array(a,base,base+tmp); pop_n_elems(2); push_array(a); return; } } PIKE_ERROR("`%", "Modulo on different types.\n", Pike_sp, 2); } switch(TYPEOF(Pike_sp[-2])) { case T_OBJECT: if(!call_lfun(LFUN_MOD,LFUN_RMOD)) PIKE_ERROR("`%", "Modulo on objects without `% operator.\n", Pike_sp, 2); return; case T_FLOAT: { FLOAT_TYPE foo; if(Pike_sp[-1].u.float_number == 0.0) OP_MODULO_BY_ZERO_ERROR("`%"); Pike_sp--; foo = (FLOAT_TYPE)(Pike_sp[-1].u.float_number / Pike_sp[0].u.float_number); foo = (FLOAT_TYPE)(Pike_sp[-1].u.float_number - Pike_sp[0].u.float_number * floor(foo)); Pike_sp[-1].u.float_number=foo; return; } case T_INT: { int of = 0; INT_TYPE a = Pike_sp[-2].u.integer, b = Pike_sp[-1].u.integer; INT_TYPE res; if (b == 0) OP_MODULO_BY_ZERO_ERROR("`%"); if(a>=0) { if(b>=0) { res = a % b; }else{ /* res = ((a+~b)%-b)-~b */ of = DO_INT_TYPE_ADD_OVERFLOW(a, ~b, &res) || DO_INT_TYPE_MOD_OVERFLOW(res, b, &res) || DO_INT_TYPE_SUB_OVERFLOW(res, ~b, &res); } }else{ if(b>=0) { /* res = b+~((~a) % b) */ of = DO_INT_TYPE_MOD_OVERFLOW(~a, b, &res) || DO_INT_TYPE_ADD_OVERFLOW(b, ~res, &res); }else{ /* a % b and a % -b are equivalent, if overflow does not * happen * res = -(-a % -b) = a % b; */ of = DO_INT_TYPE_MOD_OVERFLOW(a, b, &res); } } if (of) { stack_swap(); convert_stack_top_to_bignum(); stack_swap(); goto do_lfun_modulo; } Pike_sp--; SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, res); return; } default: PIKE_ERROR("`%", "Bad argument 1.\n", Pike_sp, 2); } } /*! @decl mixed `%(object arg1, mixed arg2) *! @decl mixed `%(mixed arg1, object arg2) *! @decl string `%(string arg1, int arg2) *! @decl array `%(array arg1, int arg2) *! @decl float `%(float arg1, float|int arg2) *! @decl float `%(int arg1, float arg2) *! @decl int `%(int arg1, int arg2) *! *! Modulo. *! *! Every expression with the @expr{%@} operator becomes a call to *! this function, i.e. @expr{a%b@} is the same as *! @expr{predef::`%(a,b)@}. *! *! @returns *! If @[arg1] is an object that implements @[lfun::`%()] then *! that function will be called with @[arg2] as the single argument. *! *! If @[arg2] is an object that implements @[lfun::``%()] then *! that function will be called with @[arg2] as the single argument. *! *! Otherwise the result will be as follows: *! @mixed arg1 *! @type string|array *! If @[arg2] is positive, the result will be the last *! @expr{`%(@[sizeof](@[arg1]), @[arg2])@} elements of @[arg1]. *! If @[arg2] is negative, the result will be the first *! @expr{`%(@[sizeof](@[arg1]), -@[arg2])@} elements of @[arg1]. *! @type int|float *! The result will be *! @expr{@[arg1] - @[arg2]*@[floor](@[arg1]/@[arg2])@}. *! The result will be a float if either @[arg1] or @[arg2] is *! a float, and an int otherwise. *! @endmixed *! *! For numbers, this means that *! @ol *! @item *! @expr{a % b@} always has the same sign as @expr{b@} *! (typically @expr{b@} is positive; *! array size, rsa modulo, etc, and @expr{a@} varies a *! lot more than @expr{b@}). *! @item *! The function @expr{f(x) = x % n@} behaves in a sane way; *! as @expr{x@} increases, @expr{f(x)@} cycles through the *! values @expr{0,1, ..., n-1, 0, ...@}. Nothing *! strange happens when you cross zero. *! @item *! The @expr{%@} operator implements the binary "mod" operation, *! as defined by Donald Knuth (see the Art of Computer Programming, *! 1.2.4). It should be noted that Pike treats %-by-0 as an error *! rather than returning 0, though. *! @item *! @expr{/@} and @expr{%@} are compatible, so that *! @expr{a == b*@[floor](a/b) + a%b@} for all @expr{a@} and @expr{b@}. *! @endol *! @seealso *! @[`/], @[floor()] */ PMOD_EXPORT void f_mod(INT32 args) { if(args != 2) SIMPLE_WRONG_NUM_ARGS_ERROR("`%", 2); o_mod(); } static int generate_mod(node *n) { if(count_args(CDR(n))==2) { struct compilation *c = THIS_COMPILATION; do_docode(CDR(n),DO_NOT_COPY_TOPLEVEL); emit0(F_MOD); modify_stack_depth(-1); return 1; } return 0; } PMOD_EXPORT void o_not(void) { switch(TYPEOF(Pike_sp[-1])) { case T_INT: SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, !Pike_sp[-1].u.integer); break; case T_FUNCTION: case T_OBJECT: if(UNSAFE_IS_ZERO(Pike_sp-1)) { pop_stack(); push_int(1); }else{ pop_stack(); push_int(0); } break; default: free_svalue(Pike_sp-1); SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, 0); } } /*! @decl int(0..1) `!(object|function arg) *! @decl int(1..1) `!(int(0..0) arg) *! @decl int(0..0) `!(mixed arg) *! *! Logical not. *! *! Every expression with the @expr{!@} operator becomes a call to *! this function, i.e. @expr{!a@} is the same as *! @expr{predef::`!(a)@}. *! *! It's also used when necessary to test truth on objects, i.e. in *! a statement @expr{if (o) ...@} where @expr{o@} is an object, the *! test becomes the equivalent of @expr{!!o@} so that any *! @[lfun::`!()] the object might have gets called. *! *! @returns *! If @[arg] is an object that implements @[lfun::`!()], that function *! will be called. *! *! If @[arg] is @expr{0@} (zero), a destructed object, or a function in a *! destructed object, @expr{1@} will be returned. *! *! Otherwise @expr{0@} (zero) will be returned. *! *! @note *! No float is considered false, not even @expr{0.0@}. *! *! @seealso *! @[`==()], @[`!=()], @[lfun::`!()] */ PMOD_EXPORT void f_not(INT32 args) { if(args != 1) SIMPLE_WRONG_NUM_ARGS_ERROR("`!", 1); o_not(); } static int generate_not(node *n) { if(count_args(CDR(n))==1) { struct compilation *c = THIS_COMPILATION; do_docode(CDR(n),DO_NOT_COPY); emit0(F_NOT); return 1; } return 0; } PMOD_EXPORT void o_compl(void) { switch(TYPEOF(Pike_sp[-1])) { case T_OBJECT: if(!call_lhs_lfun(LFUN_COMPL,1)) PIKE_ERROR("`~", "Complement on object without `~ operator.\n", Pike_sp, 1); stack_pop_keep_top(); break; case T_INT: SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, ~Pike_sp[-1].u.integer); break; case T_FLOAT: Pike_sp[-1].u.float_number = (FLOAT_TYPE) -1.0 - Pike_sp[-1].u.float_number; break; case T_TYPE: type_stack_mark(); if (Pike_sp[-1].u.type->type == T_NOT) { push_finished_type(Pike_sp[-1].u.type->car); } else { push_finished_type(Pike_sp[-1].u.type); push_type(T_NOT); } pop_stack(); push_type_value(pop_unfinished_type()); break; case T_FUNCTION: case T_PROGRAM: { /* !object(p) */ struct program *p = program_from_svalue(Pike_sp - 1); if (!p) { PIKE_ERROR("`~", "Bad argument.\n", Pike_sp, 1); } type_stack_mark(); push_object_type(0, p->id); push_type(T_NOT); pop_stack(); push_type_value(pop_unfinished_type()); } break; case T_STRING: { struct pike_string *s; ptrdiff_t len, i; if(Pike_sp[-1].u.string->size_shift) { bad_arg_error("`~", 1, 1, "string(0)", Pike_sp-1, "Expected 8-bit string.\n"); } len = Pike_sp[-1].u.string->len; s = begin_shared_string(len); for (i=0; i<len; i++) s->str[i] = ~ Pike_sp[-1].u.string->str[i]; pop_n_elems(1); push_string(end_shared_string(s)); break; } default: PIKE_ERROR("`~", "Bad argument.\n", Pike_sp, 1); } } /*! @decl mixed `~(object arg) *! @decl int `~(int arg) *! @decl float `~(float arg) *! @decl type `~(type|program arg) *! @decl string `~(string arg) *! *! Complement/inversion. *! *! Every expression with the @expr{~@} operator becomes a call to *! this function, i.e. @expr{~a@} is the same as *! @expr{predef::`~(a)@}. *! *! @returns *! The result will be as follows: *! @mixed arg *! @type object *! If @[arg] implements @[lfun::`~()], that function will be called. *! @type int *! The bitwise inverse of @[arg] will be returned. *! @type float *! The result will be @expr{-1.0 - @[arg]@}. *! @type type|program *! The type inverse of @[arg] will be returned. *! @type string *! If @[arg] only contains characters in the range 0 - 255 (8-bit), *! a string containing the corresponding 8-bit inverses will be *! returned. *! @endmixed *! *! @seealso *! @[`!()], @[lfun::`~()] */ PMOD_EXPORT void f_compl(INT32 args) { if(args != 1) SIMPLE_WRONG_NUM_ARGS_ERROR("`~", 1); o_compl(); } static int generate_compl(node *n) { if(count_args(CDR(n))==1) { struct compilation *c = THIS_COMPILATION; do_docode(CDR(n),DO_NOT_COPY); emit0(F_COMPL); return 1; } return 0; } PMOD_EXPORT void o_negate(void) { switch(TYPEOF(Pike_sp[-1])) { case T_OBJECT: do_lfun_negate: if(!call_lhs_lfun(LFUN_SUBTRACT,1)) PIKE_ERROR("`-", "Negate on object without `- operator.\n", Pike_sp, 1); stack_pop_keep_top(); break; case T_FLOAT: Pike_sp[-1].u.float_number=-Pike_sp[-1].u.float_number; return; case T_INT: if(INT_TYPE_NEG_OVERFLOW(Pike_sp[-1].u.integer)) { convert_stack_top_to_bignum(); goto do_lfun_negate; } SET_SVAL(Pike_sp[-1], T_INT, NUMBER_NUMBER, integer, -Pike_sp[-1].u.integer); return; case T_TYPE: o_compl(); return; default: PIKE_ERROR("`-", "Bad argument to unary minus.\n", Pike_sp, 1); } } static void string_or_array_range (int bound_types, struct svalue *ind, INT_TYPE low, INT_TYPE high) /* ind is modified to point to the range. low and high are INT_TYPE to * avoid truncation problems when they come from int svalues. */ { INT32 from, to, len; /* to and len are not inclusive. */ if (TYPEOF(*ind) == T_STRING) len = ind->u.string->len; else { #ifdef PIKE_DEBUG if (!ind || TYPEOF(*ind) != T_ARRAY) Pike_fatal ("Invalid ind svalue.\n"); #endif len = ind->u.array->size; } if (bound_types & RANGE_LOW_OPEN) from = 0; else { if (bound_types & RANGE_LOW_FROM_END) { if (low >= len) from = 0; else if (low < 0) from = len; else from = len - 1 - low; } else { if (low < 0) from = 0; else if (low > len) from = len; else from = low; } } if (bound_types & RANGE_HIGH_OPEN) to = len; else { if (bound_types & RANGE_HIGH_FROM_END) { if (high > len - from) to = from; else if (high <= 0) to = len; else to = len - high; } else { if (high < from) to = from; else if (high >= len) to = len; else to = high + 1; } } if (TYPEOF(*ind) == T_STRING) { struct pike_string *s; if (from == 0 && to == len) return; s=string_slice(ind->u.string, from, to-from); free_string(ind->u.string); ind->u.string=s; } else { struct array *a; a = slice_array(ind->u.array, from, to); free_array(ind->u.array); ind->u.array=a; } } static int call_old_range_lfun (int bound_types, struct object *o, struct svalue *low, struct svalue *high) /* Returns nonzero on errors to let the caller format the appropriate * messages to throw. o is assumed to be undestructed on entry. One * ref each is consumed to low and high when they're in use. */ { struct svalue end_pos; ONERROR uwp; int f; if ((f = FIND_LFUN (o->prog, LFUN_INDEX)) == -1) return 1; /* FIXME: Check if the `[] lfun accepts at least two arguments. */ /* o[a..b] => o->`[] (a, b) * o[a..<b] => o->`[] (a, o->_sizeof()-1-b) * o[a..] => o->`[] (a, Pike.NATIVE_MAX) * o[<a..b] => o->`[] (o->_sizeof()-1-a, b) * o[<a..<b] => o->`[] (o->_sizeof()-1-a, o->_sizeof()-1-b) * o[<a..] => o->`[] (o->_sizeof()-1-a, Pike.NATIVE_MAX) * o[..b] => o->`[] (0, b) * o[..<b] => o->`[] (0, o->_sizeof()-1-b) * o[..] => o->`[] (0, Pike.NATIVE_MAX) */ if (bound_types & (RANGE_LOW_FROM_END|RANGE_HIGH_FROM_END)) { int f2 = FIND_LFUN (o->prog, LFUN__SIZEOF); if (f2 == -1) return 2; apply_low (o, f2, 0); push_int (1); o_subtract(); move_svalue (&end_pos, --Pike_sp); SET_ONERROR (uwp, do_free_svalue, &end_pos); } switch (bound_types & (RANGE_LOW_FROM_BEG|RANGE_LOW_FROM_END|RANGE_LOW_OPEN)) { case RANGE_LOW_FROM_BEG: move_svalue (Pike_sp++, low); mark_free_svalue (low); break; case RANGE_LOW_OPEN: push_int (0); break; default: push_svalue (&end_pos); move_svalue (Pike_sp++, low); mark_free_svalue (low); o_subtract(); break; } switch (bound_types & (RANGE_HIGH_FROM_BEG|RANGE_HIGH_FROM_END|RANGE_HIGH_OPEN)) { case RANGE_HIGH_FROM_BEG: move_svalue (Pike_sp++, high); mark_free_svalue (high); break; case RANGE_HIGH_OPEN: push_int (MAX_INT_TYPE); break; default: push_svalue (&end_pos); move_svalue (Pike_sp++, high); mark_free_svalue (high); o_subtract(); break; } if (bound_types & (RANGE_LOW_FROM_END|RANGE_HIGH_FROM_END)) { UNSET_ONERROR (uwp); free_svalue (&end_pos); /* Anything might have happened during the calls to * LFUN__SIZEOF and o_subtract above. */ if (!o->prog) return 3; } apply_low (o, f, 2); return 0; } static const char *range_func_name (int bound_types) { /* Since the number of arguments on the stack depend on bound_types * we have to make some effort to make it show in the backtrace. */ switch (bound_types) { case RANGE_LOW_FROM_BEG|RANGE_HIGH_FROM_BEG: return "arg1[arg2..arg3]"; case RANGE_LOW_FROM_BEG|RANGE_HIGH_FROM_END: return "arg1[arg2..<arg3]"; case RANGE_LOW_FROM_BEG|RANGE_HIGH_OPEN: return "arg1[arg2..]"; case RANGE_LOW_FROM_END|RANGE_HIGH_FROM_BEG: return "arg1[<arg2..arg3]"; case RANGE_LOW_FROM_END|RANGE_HIGH_FROM_END: return "arg1[<arg2..<arg3]"; case RANGE_LOW_FROM_END|RANGE_HIGH_OPEN: return "arg1[<arg2..]"; case RANGE_LOW_OPEN|RANGE_HIGH_FROM_BEG: return "arg1[..arg2]"; case RANGE_LOW_OPEN|RANGE_HIGH_FROM_END: return "arg1[..<arg2]"; case RANGE_LOW_OPEN|RANGE_HIGH_OPEN: return "arg1[..]"; #ifdef PIKE_DEBUG default: Pike_fatal ("Unexpected bound_types.\n"); #endif } UNREACHABLE(return "Unexpected bound_types"); } PMOD_EXPORT void o_range2 (int bound_types) /* This takes between one and three args depending on whether * RANGE_LOW_OPEN and/or RANGE_HIGH_OPEN is set in bound_types. */ { struct svalue *ind, *low, *high; high = bound_types & RANGE_HIGH_OPEN ? Pike_sp : Pike_sp - 1; low = bound_types & RANGE_LOW_OPEN ? high : high - 1; ind = low - 1; switch (TYPEOF(*ind)) { case T_OBJECT: { struct object *o = ind->u.object; int f; if (!o->prog) bad_arg_error (range_func_name (bound_types), Pike_sp - ind, 1, "object", ind, "Cannot call `[..] in destructed object.\n"); if ((f = FIND_LFUN(o->prog->inherits[SUBTYPEOF(*ind)].prog, LFUN_RANGE)) != -1) { struct svalue h; if (!(bound_types & RANGE_HIGH_OPEN)) { move_svalue (&h, high); Pike_sp = high; } if (bound_types & RANGE_LOW_FROM_BEG) push_int (INDEX_FROM_BEG); else if (bound_types & RANGE_LOW_OPEN) { push_int (0); push_int (OPEN_BOUND); } else push_int (INDEX_FROM_END); if (bound_types & RANGE_HIGH_FROM_BEG) { move_svalue (Pike_sp++, &h); push_int (INDEX_FROM_BEG); } else if (bound_types & RANGE_HIGH_OPEN) { push_int (0); push_int (OPEN_BOUND); } else { move_svalue (Pike_sp++, &h); push_int (INDEX_FROM_END); } apply_low (o, f, 4); stack_pop_keep_top(); } else switch (call_old_range_lfun (bound_types, o, low, high)) { case 1: bad_arg_error (range_func_name (bound_types), Pike_sp - ind, 1, "object", ind, "Object got neither `[..] nor `[].\n"); break; case 2: bad_arg_error (range_func_name (bound_types), Pike_sp - ind, 1, "object", ind, "Object got no `[..] and there is no _sizeof to " "translate the from-the-end index to use `[].\n"); break; case 3: bad_arg_error (range_func_name (bound_types), 3, 1, "object", ind, "Cannot call `[..] in destructed object.\n"); break; default: free_svalue (ind); move_svalue (ind, Pike_sp - 1); /* low and high have lost their refs in call_old_range_lfun. */ Pike_sp = ind + 1; break; } break; } case T_STRING: case T_ARRAY: { INT_TYPE l=0, h=0; if (!(bound_types & RANGE_LOW_OPEN)) { if (TYPEOF(*low) != T_INT) bad_arg_error (range_func_name (bound_types), Pike_sp - ind, 2, "int", low, "Bad lower bound. Expected int, got %s.\n", get_name_of_type (TYPEOF(*low))); l = low->u.integer; } if (!(bound_types & RANGE_HIGH_OPEN)) { if (TYPEOF(*high) != T_INT) bad_arg_error (range_func_name (bound_types), Pike_sp - ind, high - ind + 1, "int", high, "Bad upper bound. Expected int, got %s.\n", get_name_of_type (TYPEOF(*high))); h = high->u.integer; } /* Can pop off the bounds without fuzz since they're simple integers. */ Pike_sp = ind + 1; string_or_array_range (bound_types, ind, l, h); break; } default: bad_arg_error (range_func_name (bound_types), Pike_sp - ind, 1, "string|array|object", ind, "Cannot use [..] on a %s. Expected string, array or object.\n", get_name_of_type (TYPEOF(*ind))); } } /*! @decl mixed `[..](object arg, mixed start, int start_type, mixed end, int end_type) *! @decl string `[..](string arg, int start, int start_type, int end, int end_type) *! @decl array `[..](array arg, int start, int start_type, int end, int end_type) *! *! Extracts a subrange. *! *! This is the function form of expressions with the @expr{[..]@} *! operator. @[arg] is the thing from which the subrange is to be *! extracted. @[start] is the lower bound of the subrange and *! @[end] the upper bound. *! *! @[start_type] and @[end_type] specifies how the @[start] and *! @[end] indices, respectively, are to be interpreted. The types *! are either @[Pike.INDEX_FROM_BEG], @[Pike.INDEX_FROM_END] or *! @[Pike.OPEN_BOUND]. In the last case, the index value is *! insignificant. *! *! The relation between @expr{[..]@} expressions and this function *! is therefore as follows: *! *! @code *! a[i..j] <=> `[..] (a, i, Pike.INDEX_FROM_BEG, j, Pike.INDEX_FROM_BEG) *! a[i..<j] <=> `[..] (a, i, Pike.INDEX_FROM_BEG, j, Pike.INDEX_FROM_END) *! a[i..] <=> `[..] (a, i, Pike.INDEX_FROM_BEG, 0, Pike.OPEN_BOUND) *! a[<i..j] <=> `[..] (a, i, Pike.INDEX_FROM_END, j, Pike.INDEX_FROM_BEG) *! a[<i..<j] <=> `[..] (a, i, Pike.INDEX_FROM_END, j, Pike.INDEX_FROM_END) *! a[<i..] <=> `[..] (a, i, Pike.INDEX_FROM_END, 0, Pike.OPEN_BOUND) *! a[..j] <=> `[..] (a, 0, Pike.OPEN_BOUND, j, Pike.INDEX_FROM_BEG) *! a[..<j] <=> `[..] (a, 0, Pike.OPEN_BOUND, j, Pike.INDEX_FROM_END) *! a[..] <=> `[..] (a, 0, Pike.OPEN_BOUND, 0, Pike.OPEN_BOUND) *! @endcode *! *! The subrange is specified as follows by the two bounds: *! *! @ul *! @item *! If the lower bound refers to an index before the lowest *! allowable (typically zero) then it's taken as an open bound *! which starts at the first index (without any error). *! *! @item *! Correspondingly, if the upper bound refers to an index past *! the last allowable then it's taken as an open bound which *! ends at the last index (without any error). *! *! @item *! If the lower bound is less than or equal to the upper bound, *! then the subrange is the inclusive range between them, i.e. *! from and including the element at the lower bound and up to *! and including the element at the upper bound. *! *! @item *! If the lower bound is greater than the upper bound then the *! result is an empty subrange (without any error). *! @endul *! *! @returns *! The returned value depends on the type of @[arg]: *! *! @mixed arg *! @type string *! A string with the characters in the range is returned. *! *! @type array *! An array with the elements in the range is returned. *! *! @type object *! If the object implements @[lfun::`[..]], that function is *! called with the four remaining arguments. *! *! As a compatibility measure, if the object does not implement *! @[lfun::`[..]] but @[lfun::`[]] then the latter is called *! with the bounds transformed to normal from-the-beginning *! indices in array-like fashion: *! *! @dl *! @item @expr{`[..] (a, i, Pike.INDEX_FROM_BEG, j, Pike.INDEX_FROM_BEG)@} *! Calls @expr{a->`[] (i, j)@} *! @item @expr{`[..] (a, i, Pike.INDEX_FROM_BEG, j, Pike.INDEX_FROM_END)@} *! Calls @expr{a->`[] (i, a->_sizeof()-1-j)@} *! @item @expr{`[..] (a, i, Pike.INDEX_FROM_BEG, 0, Pike.OPEN_BOUND)@} *! Calls @expr{a->`[] (i, @[Int.NATIVE_MAX])@} *! @item @expr{`[..] (a, i, Pike.INDEX_FROM_END, j, Pike.INDEX_FROM_BEG)@} *! Calls @expr{a->`[] (a->_sizeof()-1-i, j)@} *! @item @expr{`[..] (a, i, Pike.INDEX_FROM_END, j, Pike.INDEX_FROM_END)@} *! Calls @expr{a->`[] (a->_sizeof()-1-i, a->_sizeof()-1-j)@}, *! except that @expr{a->_sizeof()@} is called only once. *! @item @expr{`[..] (a, i, Pike.INDEX_FROM_END, 0, Pike.OPEN_BOUND)@} *! Calls @expr{a->`[] (a->_sizeof()-1-i, @[Int.NATIVE_MAX])@} *! @item @expr{`[..] (a, 0, Pike.OPEN_BOUND, j, Pike.INDEX_FROM_BEG)@} *! Calls @expr{a->`[] (0, j)@} *! @item @expr{`[..] (a, 0, Pike.OPEN_BOUND, j, Pike.INDEX_FROM_END)@} *! Calls @expr{a->`[] (0, a->_sizeof()-1-j)@} *! @item @expr{`[..] (a, 0, Pike.OPEN_BOUND, 0, Pike.OPEN_BOUND)@} *! Calls @expr{a->`[] (0, @[Int.NATIVE_MAX])@} *! @enddl *! *! Note that @[Int.NATIVE_MAX] might be replaced with an even *! larger integer in the future. *! @endmixed *! *! @seealso *! @[lfun::`[..]], @[`[]] */ PMOD_EXPORT void f_range(INT32 args) { struct svalue *ind; if (args != 5) SIMPLE_WRONG_NUM_ARGS_ERROR ("predef::`[..]", 5); ind = Pike_sp - 5; #define CALC_BOUND_TYPES(bound_types) do { \ if (TYPEOF(ind[2]) != T_INT) \ SIMPLE_ARG_TYPE_ERROR ("predef::`[..]", 3, "int"); \ switch (ind[2].u.integer) { \ case INDEX_FROM_BEG: bound_types = RANGE_LOW_FROM_BEG; break; \ case INDEX_FROM_END: bound_types = RANGE_LOW_FROM_END; break; \ case OPEN_BOUND: bound_types = RANGE_LOW_OPEN; break; \ default: \ SIMPLE_ARG_ERROR ("predef::`[..]", 3, "Unrecognized bound type."); \ } \ \ if (TYPEOF(ind[4]) != T_INT) \ SIMPLE_ARG_TYPE_ERROR ("predef::`[..]", 5, "int"); \ switch (ind[4].u.integer) { \ case INDEX_FROM_BEG: bound_types |= RANGE_HIGH_FROM_BEG; break; \ case INDEX_FROM_END: bound_types |= RANGE_HIGH_FROM_END; break; \ case OPEN_BOUND: bound_types |= RANGE_HIGH_OPEN; break; \ default: \ SIMPLE_ARG_ERROR ("predef::`[..]", 5, "Unrecognized bound type."); \ } \ } while (0) switch (TYPEOF(*ind)) { case T_OBJECT: { struct object *o = ind->u.object; int f; if (!o->prog) SIMPLE_ARG_ERROR ("predef::`[..]", 1, "Cannot call `[..] in destructed object.\n"); if ((f = FIND_LFUN(o->prog->inherits[SUBTYPEOF(*ind)].prog, LFUN_RANGE)) != -1) { apply_low (o, f, 4); stack_pop_keep_top(); } else { int bound_types; CALC_BOUND_TYPES (bound_types); switch (call_old_range_lfun (bound_types, o, ind + 1, ind + 3)) { case 1: SIMPLE_ARG_ERROR ("predef::`[..]", 1, "Object got neither `[..] nor `[].\n"); break; case 2: SIMPLE_ARG_ERROR ("predef::`[..]", 1, "Object got no `[..] and there is no _sizeof to " "translate the from-the-end index to use `[].\n"); break; case 3: SIMPLE_ARG_ERROR ("predef::`[..]", 1, "Cannot call `[..] in destructed object.\n"); break; default: free_svalue (ind); move_svalue (ind, Pike_sp - 1); /* The bound types are simple integers and the bounds * themselves have lost their refs in call_old_range_lfun. */ Pike_sp = ind + 1; break; } } break; } case T_STRING: case T_ARRAY: { INT_TYPE l=0, h=0; int bound_types; CALC_BOUND_TYPES (bound_types); if (!(bound_types & RANGE_LOW_OPEN)) { if (TYPEOF(ind[1]) != T_INT) SIMPLE_ARG_TYPE_ERROR ("predef::`[..]", 2, "int"); l = ind[1].u.integer; } if (!(bound_types & RANGE_HIGH_OPEN)) { if (TYPEOF(ind[3]) != T_INT) SIMPLE_ARG_TYPE_ERROR ("predef::`[..]", 4, "int"); h = ind[3].u.integer; } pop_n_elems (4); string_or_array_range (bound_types, ind, l, h); break; } default: SIMPLE_ARG_TYPE_ERROR ("predef::`[..]", 1, "string|array|object"); } } /*! @decl mixed `[](object arg, mixed index) *! @decl mixed `[](object arg, string index) *! @decl function `[](int arg, string index) *! @decl int `[](string arg, int index) *! @decl mixed `[](array arg, int index) *! @decl mixed `[](array arg, mixed index) *! @decl mixed `[](mapping arg, mixed index) *! @decl int(0..1) `[](multiset arg, mixed index) *! @decl mixed `[](program arg, string index) *! @decl mixed `[](object arg, mixed start, mixed end) *! @decl string `[](string arg, int start, int end) *! @decl array `[](array arg, int start, int end) *! *! Indexing. *! *! This is the function form of expressions with the @expr{[]@} *! operator, i.e. @expr{a[i]@} is the same as *! @expr{predef::`[](a,i)@}. *! *! @returns *! If @[arg] is an object that implements @[lfun::`[]()], that *! function is called with the @[index] argument. *! *! Otherwise, the action depends on the type of @[arg]: *! *! @mixed arg *! @type object *! The non-protected (i.e. public) symbol named @[index] is *! looked up in @[arg]. *! *! @type int *! The bignum function named @[index] is looked up in @[arg]. *! The bignum functions are the same as those in the @[Gmp.mpz] *! class. *! *! @type string *! The character at index @[index] in @[arg] is returned as an *! integer. The first character in the string is at index<

pike.git/ src/ operators.c > 9f42db355d147927f235bf42299344c619e3ced7 [Annotate]