pike.git/lib/master.pike.in:b440ab1e0f04324c639a48adc3a721e61ca23d0f

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4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 // -*- Pike -*- // // Master Control Program for Pike. // // 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. // // $Id: master.pike.in,v 1.333 2004/02/08 16:03:13 grubba Exp $ #pike __REAL_VERSION__ // Some programs destroys character pairs beginning with the currency // symbol when running in chinese locale. #if "¤/" != "\244/" #error "master.pike.in is corrupted." #endif // --- Some configurable parameters #define PIKE_AUTORELOAD #define GETCWD_CACHE #define FILE_STAT_CACHE // This define is searched and replaced by bin/install.pike. #undef PIKE_MODULE_RELOC #ifndef PIKE_WARNINGS #define PIKE_WARNINGS 1 #endif /* PIKE_WARNINGS */ // --- Global constants and variables // Used by describe_backtrace() et al. #if !defined(BT_MAX_STRING_LEN) || (BT_MAX_STRING_LEN <= 0) #undef BT_MAX_STRING_LEN #define BT_MAX_STRING_LEN 200 #endif /* !defined(BT_MAX_STRING_LEN) || (BT_MAX_STRING_LEN <= 0) */ constant bt_max_string_len = BT_MAX_STRING_LEN; //! @decl constant bt_max_string_len = 200 //! This constant contains the maximum length of a function entry in a //! backtrace. Defaults to 200 if no BT_MAX_STRING_LEN define has been //! given. // Enables the out of date warning in low_findprog(). #ifndef OUT_OF_DATE_WARNING #define OUT_OF_DATE_WARNING 1 #endif /* OUT_OF_DATE_WARNING */ constant out_of_date_warning = OUT_OF_DATE_WARNING; #if defined(__NT__) || defined(__amigaos__) #define PATH_SEPARATOR ";" #else #define PATH_SEPARATOR ":" #endif #ifdef __amigaos__ #define UPDIR "/" #else #define UPDIR "../" #endif //! @decl constant out_of_date_warning = 1 //! Should Pike complain about out of date compiled files. //! 1 means yes and 0 means no. Controlled by the OUT_OF_DATE_WARNING //! define. //! If not zero compilation warnings will be written out on stderr. int want_warnings = PIKE_WARNINGS; //! int compat_major=-1; //! int compat_minor=-1; // --- Functions begin here. // Have to access some stuff without going through the resolver. private constant Builtin = _static_modules.Builtin; private constant Files = _static_modules.___files; #define Stat Files.Stat #define capitalize(X) (upper_case((X)[..0])+(X)[1..]) #define write(X ...) (Files()->_stdout->write(X)) #define trim_all_whites(X) (Builtin()->string_trim_all_whites (X)) #ifdef RESOLV_DEBUG #if constant (thread_local) static object resolv_msg_depth = thread_local(); // NOTE: May be used before __INIT has completed. #define GET_RESOLV_MSG_DEPTH (resolv_msg_depth && resolv_msg_depth->get()) #define INC_RESOLV_MSG_DEPTH() (resolv_msg_depth && resolv_msg_depth->set (resolv_msg_depth->get() + 1)) #define DEC_RESOLV_MSG_DEPTH() (resolv_msg_depth && resolv_msg_depth->set (resolv_msg_depth->get() - 1)) #else static int resolv_msg_depth; #define GET_RESOLV_MSG_DEPTH resolv_msg_depth #define INC_RESOLV_MSG_DEPTH() (++resolv_msg_depth) #define DEC_RESOLV_MSG_DEPTH() (--resolv_msg_depth) #endif void resolv_debug (string fmt, mixed... args) { string pad = " " * GET_RESOLV_MSG_DEPTH; if (sizeof (args)) fmt = sprintf (fmt, @args); if (fmt[-1] == '\n') fmt = pad + replace (fmt[..sizeof (fmt) - 2], "\n", "\n" + pad) + "\n"; else fmt = pad + replace (fmt, "\n", "\n" + pad); werror (fmt); } #else // !RESOLV_DEBUG #define INC_RESOLV_MSG_DEPTH() 0 #define DEC_RESOLV_MSG_DEPTH() 0 #define resolv_debug(X...) do {} while (0) #endif // !RESOLV_DEBUG //! @appears error //! Throws an error. A more readable version of the code //! @expr{throw( ({ sprintf(f, @@args), backtrace() }) )@}. void error(string f, mixed ... args) { array b = backtrace(); if (sizeof(args)) f = sprintf(f, @args); throw( ({ f, b[..sizeof(b)-2] }) ); } // FIXME: Should the pikeroot-things be private? #ifdef PIKE_FAKEROOT object o; string fakeroot(string s) { string tmp1=combine_path_with_cwd(s); #ifdef PIKE_FAKEROOT_OMIT foreach(PIKE_FAKEROOT_OMIT/PATH_SEPARATOR, string x) if(glob(x,tmp1)) return s; #endif return PIKE_FAKEROOT+tmp1; } #else #define fakeroot(X) X #endif // PIKE_FAKEROOT #ifdef PIKE_MODULE_RELOC string relocate_module(string s) { if(s == "/${PIKE_MODULE_PATH}" || has_prefix (s, "/${PIKE_MODULE_PATH}/")) { string tmp = s[21..]; foreach(pike_module_path, string path) { string s2 = fakeroot(sizeof(tmp)? combine_path(path, tmp) : path); if(master_file_stat(s2)) return s2; } } return fakeroot(s); } string unrelocate_module(string s) { if(s == "/${PIKE_MODULE_PATH}" || has_prefix (s, "/${PIKE_MODULE_PATH}/")) return s; foreach(pike_module_path, string path) if(s == path) return "/${PIKE_MODULE_PATH}"; else { path = combine_path(path, ""); if(has_prefix (s, path)) return "/${PIKE_MODULE_PATH}/"+s[sizeof(path)..]; } /* This is necessary to find compat modules... */ foreach(pike_module_path, string path) { path = combine_path(path, UPDIR, ""); if(has_prefix (s, path)) return "/${PIKE_MODULE_PATH}/"+UPDIR+s[sizeof(path)..]; } return s; } #ifdef fakeroot #undef fakeroot #endif #define fakeroot relocate_module #endif // PIKE_MODULE_RELOC //! @appears is_absolute_path //! Check if a path @[p] is fully qualified (ie not relative). //! //! @returns //! Returns 1 if the path is absolute, 0 otherwise. int is_absolute_path(string p) { #ifdef __amigaos__ #define IS_ABSOLUTE_PATH(X) (search((X),":")>0) return IS_ABSOLUTE_PATH(p); #else #ifdef __NT__ p=replace(p,"\\","/"); if(sscanf(p,"%[a-zA-Z]:%*c",string s)==2 && sizeof(s)==1) return 1; #define IS_ABSOLUTE_PATH is_absolute_path #else #define IS_ABSOLUTE_PATH(X) has_prefix((X),"/") #endif return has_prefix(p,"/"); #endif } #ifdef __NT__ #define EXPLODE_PATH(X) (replace((X),"\\","/")/"/") #else #define EXPLODE_PATH(X) ((X)/"/") #endif //! @appears explode_path //! Split a path @[p] into its components. //! //! This function divides a path into its components. This might seem like //! it could be done by dividing the string on <tt>"/"</tt>, but that will //! not work on some operating systems. To turn the components back into //! a path again, use @[combine_path()]. //! array(string) explode_path(string p) { #ifdef __amigaos__ int colon = search(reverse(p), ":"); if(colon >= 0) return ({ p[..sizeof(p)-colon-1] }) + explode_path(p[sizeof(p)-colon..]); array(string) r = p/"/"; return replace(r[..sizeof(r)-2], "", "/")+r[sizeof(r)-1..]; #else array(string) r = EXPLODE_PATH(p); if(r[0] == "" && sizeof(p)) r[0] = "/"; return r; #endif } //! @appears dirname //! Returns all but the last segment of a path. Some example inputs and //! outputs: //! //! @xml{<matrix> //! <r><c><b>Expression</b></c><c><b>Value</b></c></r> //! <r><c>dirname("/a/b")</c><c>"/a"</c></r> //! <r><c>dirname("/a/")</c><c>"/a"</c></r> //! <r><c>dirname("/a")</c><c>"/"</c></r> //! <r><c>dirname("/")</c><c>"/"</c></r> //! <r><c>dirname("")</c><c>""</c></r> //! </matrix>@} //! //! @seealso //! @[basename()], @[explode_path()] string dirname(string x) { if(x=="") return ""; #ifdef __amigaos__ array(string) tmp=x/":"; array(string) tmp2=tmp[-1]/"/"; tmp[-1]=tmp2[..sizeof(tmp2)-2]*"/"; if(sizeof(tmp2) >= 2 && tmp2[-2]=="") tmp[-1]+="/"; return tmp*":"; #else array(string) tmp=EXPLODE_PATH(x); if(x[0]=='/' && sizeof(tmp)<3) return "/"; return tmp[..sizeof(tmp)-2]*"/"; #endif } //! @appears basename //! Returns the last segment of a path. //! //! @seealso //! @[dirname()], @[explode_path()] string basename(string x) { #ifdef __amigaos__ return ((x/":")[-1]/"/")[-1]; #define BASENAME(X) ((((X)/":")[-1]/"/")[-1]) #else array(string) tmp=EXPLODE_PATH(x); return tmp[-1]; #define BASENAME(X) (EXPLODE_PATH(X)[-1]) #endif } #ifdef PIKE_AUTORELOAD int autoreload_on; int newest; #define AUTORELOAD_CHECK_FILE(X) \ if(autoreload_on) if(Stat s=master_file_stat(X)) if(s->mtime>newest) newest=[int]s->mtime; #define AUTORELOAD_BEGIN() \ int ___newest=newest; \ newest=0 #define AUTORELOAD_FINISH(VAR, CACHE, FILE) \ if(autoreload_on) { \ mixed val = CACHE[FILE]; \ if(!zero_type (val) && val != no_value && newest <= load_time[FILE]) { \ VAR = val; \ } \ } \ load_time[FILE]=time(); \ if(___newest > newest) newest=___newest; mapping(string:int) load_time=([]); #else #define AUTORELOAD_CHECK_FILE(X) #define AUTORELOAD_BEGIN() #define AUTORELOAD_FINISH(VAR,CACHE,FILE) #endif // PIKE_AUTORELOAD //! @appears compile_string //! Compile the Pike code in the string @[source] into a program. //! If @[filename] is not specified, it will default to @expr{"-"@}. //! //! Functionally equal to @expr{@[compile](@[cpp](@[source], @[filename]))@}. //! //! @seealso //! @[compile()], @[cpp()], @[compile_file()] //! program compile_string(string source, void|string filename, object|void handler, void|program p, void|object o) { return compile(cpp(source, filename||"-", 1, handler, compat_major, compat_minor), handler, compat_major, compat_minor, p, o); } //! string master_read_file(string file) { object o=Files()->Fd(); if( ([function(string, string : int)]o->open)(fakeroot(file),"r") ) return ([function(void : string)]o->read)(); return 0; } #ifdef GETCWD_CACHE static string current_path; int cd(string s) { current_path=0; return predef::cd(s); } string getcwd() { return current_path || (current_path=predef::getcwd()); } #endif // GETCWD_CACHE string combine_path_with_cwd(string ... paths) { return combine_path(IS_ABSOLUTE_PATH(paths[0])?"":getcwd(),@paths); } #ifdef FILE_STAT_CACHE #define FILE_STAT_CACHE_TIME 20 int invalidate_time; mapping(string:multiset(string)) dir_cache = ([]); Stat master_file_stat(string x) { string dir = combine_path_with_cwd(x); string file = BASENAME(dir); dir = dirname(dir); if(time() > invalidate_time) { dir_cache = ([]); invalidate_time = time()+FILE_STAT_CACHE_TIME; } multiset(string) d = dir_cache[dir]; if( zero_type(d) ) { array(string) tmp = get_dir(dir); if(tmp) { #ifdef __NT__ tmp = map(tmp, lower_case); #endif d = dir_cache[dir] = aggregate_multiset(@tmp); } else dir_cache[dir]=0; } #ifdef __NT__ file = lower_case(file); #endif if(d && !d[file]) return 0; return predef::file_stat(x); } #else #define master_file_stat file_stat #endif // FILE_STAT_CACHE //! Mapping containing the environment variables. //! //! The mapping currently has the following structure: //! @mapping //! @member array(string) index //! Note that the index is @[lower_case()]'d on NT. //! @array //! @elem string varname //! Variable name with case intact. //! @elem string value //! Variable value. //! @endarray //! @endmapping //! //! @note //! This mapping should not be accessed directly; use @[getenv()] //! and @[putenv()] instead. //! //! @note //! This mapping is not compatible with @[Process.create_process()]; //! use the mapping returned from calling @[getenv()] without arguments //! instead. mapping(string:array(string)) environment=([]); //! @decl string getenv(string varname) //! @decl mapping(string:string) getenv() //! @appears getenv //! //! When called with no arguments, a mapping with all current environment //! variables will be returned. Destructive opreations on the mapping //! will not affect the internal environment representation. //! //! If the @[varname] argument has been given, the value of the environment //! variable with the name @[varname] will be returned. If no such //! environment variable exists, @expr{0@} (zero) will be returned. //! //! On NT the environment variable name is case insensitive. //! string|mapping(string:string) getenv(string|void s) { if(!s) return [mapping(string:string)]aggregate_mapping( @(values(environment)*({}) ) ); #ifdef __NT__ s = lower_case(s); #endif return environment[s] && environment[s][1]; } //! @appears compile_file //! Compile the Pike code contained in the file @[filename] into a program. //! //! This function will compile the file @[filename] to a Pike program that can //! later be instantiated. It is the same as doing //! @expr{@[compile_string](@[Stdio.read_file](@[filename]), @[filename])@}. //! //! @seealso //! @[compile()], @[compile_string()], @[cpp()] //! program compile_file(string filename, object|void handler, void|program p, void|object o) { AUTORELOAD_CHECK_FILE(filename); return compile(cpp(master_read_file(filename), filename, 1, handler, compat_major, compat_minor), handler, compat_major, compat_minor, p, o); } #if 0 variant mapping(string:string) getenv() { return environment + ([]); } variant string getenv(string s) { return environment[s]; } function(:mapping(string:string))|function(string:string) getenv(s) { if(!s) return environment + ([]); return environment[s]; } // mapping(string:string) getenv() | string getenv(string s) { if(!s) return environment + ([]); return environment[s]; } #endif /* 0 */ //! @appears putenv //! Sets the environment variable @[varname] to @[value]. //! //! On NT the environment variable name is case insensitive. //! //! @seealso //! @[getenv()] //! void putenv(string varname, string value) { string index = varname; #ifdef __NT__ index = lower_case(varname); if (environment[index] && environment[index][0]) varname = environment[index][0]; #endif environment[index] = ({ varname, value }); } //! @appears normalize_path //! Replaces "\" with "/" if runing on MS Windows. It is //! adviced to use @[System.normalize_path] instead. string normalize_path( string path ) { #ifndef __NT__ return path; #else return replace(path,"\\","/"); #endif } //! Mapping containing the cache of currently compiled files. //! //! This mapping currently has the following structure: //! @mapping //! @member program filename //! @endmapping //! The filename path seperator is / on both NT and UNIX. //! //! @note //! As a special case the current master program is available //! under the name @expr{"/master"@}. mapping(string:program|NoValue) programs=(["/master":this_program]); mapping (program:object|NoValue) objects=([ this_program : this, object_program(_static_modules): _static_modules ]); mapping(string:object|NoValue) fc=([]); // Note: It's assumed that the mappings above never decrease in size // except in *_reverse_lookup(). no_value is used for entries that // should be considered removed. constant no_value = (<>); constant NoValue = typeof (no_value); // The reverse mapping for objects isn't only for speed; search() // doesn't work reliably there since it calls `==. static mapping(program:string) rev_programs = ([]); static mapping(object:program) rev_objects = ([]); static mapping(mixed:string) rev_fc = ([]); string programs_reverse_lookup (program prog) //! Returns the path for @[prog] in @[programs], if it got any. { // When running with trace, this function can get called // before __INIT has completed. if (!rev_programs) return UNDEFINED; if (sizeof (rev_programs) < sizeof (programs)) { foreach (programs; string path; program|NoValue prog) if (prog == no_value) m_delete (programs, path); else rev_programs[prog] = path; } return rev_programs[prog]; } program objects_reverse_lookup (object obj) //! Returns the program for @[obj] in @[objects], if it got any. { if (sizeof (rev_objects) < sizeof (objects)) { foreach (objects; program prog; object|NoValue obj) if (obj == no_value) m_delete (objects, obj); else rev_objects[obj] = prog; } return rev_objects[obj]; } string fc_reverse_lookup (object obj) //! Returns the path for @[obj] in @[fc], if it got any. { if (sizeof (rev_fc) < sizeof (fc)) { foreach (fc; string path; mixed obj) if (obj == no_value) m_delete (fc, obj); else rev_fc[obj] = path; } return rev_fc[obj]; } array(string) query_precompiled_names(string fname) { // Filenames of potential precompiled files in priority order. #ifdef PRECOMPILED_SEARCH_MORE // Search for precompiled files in all module directories, not just // in the one where the source file is. This is useful when running // pike directly from the build directory. fname = fakeroot (fname); // FIXME: Not sure if this works correctly with the fakeroot and // module relocation stuff. foreach (pike_module_path, string path) if (has_prefix (fname, path)) return map (pike_module_path, `+, "/", fname[sizeof (path)..], ".o"); #endif return ({ fname + ".o" }); } static class CompileCallbackError (string error_message, array error_backtrace) { constant is_generic_error = 1; constant is_compile_callback_error = 1; } static void compile_cb_error (string msg, mixed ... args) // Use this to throw errors that should be converted to plain compile // error messages, without backtraces being reported by // compile_exception. { if (sizeof (args)) msg = sprintf (msg, @args); array bt = backtrace(); bt = bt[..sizeof (bt) - 2]; throw (CompileCallbackError (msg, bt)); } static void compile_cb_rethrow (object|array err) // Use this to rethrow errors that should be converted to plain // compile error messages, without backtraces being reported by // compile_exception. { array bt; if (array|object e = catch (bt = get_backtrace (err))) handle_error (e); throw (CompileCallbackError (describe_error (err), bt)); } static void call_compile_warning (object handler, string file, string msg, mixed ... args) { if (sizeof (args)) msg = sprintf (msg, @args); msg = trim_all_whites (msg); if (handler && handler->compile_warning) handler->compile_warning (file, 0, msg); else compile_warning (file, 0, msg); } #if constant(_static_modules.Builtin.mutex) #define THREADED Builtin.mutex compilation_mutex = Builtin()->mutex(); #endif static program low_findprog(string pname, string ext, object|void handler, void|int mkobj) { program ret; Stat s; string fname=pname+ext; resolv_debug("low_findprog(%O, %O, %O, %O)\n", pname, ext, handler, mkobj); #ifdef THREADED object key; // FIXME: The catch is needed, since we might be called in // a context when threads are disabled. // (compile() disables threads). mixed err = catch { key=compilation_mutex->lock(2); }; if (err) { werror( "low_findprog: Caught spurious error:\n" "%s\n", describe_backtrace(err) ); } #endif #ifdef PIKE_MODULE_RELOC fname = unrelocate_module(fname); #endif #ifdef PIKE_AUTORELOAD if(!autoreload_on || load_time[fname]>=time()) #endif { if(!zero_type (ret=programs[fname]) && ret != no_value) { resolv_debug ("low_findprog %s: returning cached (no autoreload)\n", fname); return ret; } } #ifdef __NT__ // Ugly kluge to work better with cygwin32 "/X:/" paths. if(getenv("OSTYPE")=="cygwin32") { string tmp=fname[..1]; if((tmp=="//" || tmp=="\\\\") && (fname[3]=='/' || fname[3]=='\\')) { if(!master_file_stat(fname)) { fname=fname[2..2]+":"+fname[3..]; } } } #endif if( (s=master_file_stat(fakeroot(fname))) && s->isreg ) { AUTORELOAD_BEGIN(); #ifdef PIKE_AUTORELOAD if (load_time[fname] > s->mtime) if (!zero_type (ret=programs[fname]) && ret != no_value) { resolv_debug ("low_findprog %s: returning cached (autoreload)\n", fname); return ret; } #endif switch(ext) { case "": case ".pike": foreach(query_precompiled_names(fname), string oname) { if(Stat s2=master_file_stat(fakeroot(oname))) { if(s2->isreg && s2->mtime >= s->mtime) { mixed err=catch { AUTORELOAD_CHECK_FILE(oname); resolv_debug ("low_findprog %s: decoding dumped\n", fname); INC_RESOLV_MSG_DEPTH(); ret = decode_value(master_read_file(oname), (handler && handler->get_codec || get_codec)(fname, mkobj)); DEC_RESOLV_MSG_DEPTH(); resolv_debug ("low_findprog %s: dump decode ok\n", fname); return programs[fname] = ret; }; DEC_RESOLV_MSG_DEPTH(); resolv_debug ("low_findprog %s: dump decode failed\n", fname); programs[fname] = no_value; call_compile_warning (handler, oname, "Decode failed: " + describe_error(err)); } else if (out_of_date_warning) { call_compile_warning (handler, oname, "Compiled file is out of date"); } } } resolv_debug ("low_findprog %s: compiling, mkobj: %O\n", fname, mkobj); INC_RESOLV_MSG_DEPTH(); programs[fname]=ret=__empty_program(0, fname); AUTORELOAD_CHECK_FILE (fname); string src; if (array|object err = catch (src = master_read_file (fname))) { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("low_findprog %s: failed to read file\n", fname); objects[ret] = no_value; ret=programs[fname]=0; // Negative cache. compile_cb_rethrow (err); } if ( mixed e=catch { ret=compile_string(src, fname, handler, ret, mkobj? (objects[ret]=__null_program()) : 0); } ) { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("low_findprog %s: compilation failed\n", fname); objects[ret] = no_value; ret=programs[fname]=0; // Negative cache. throw(e); } DEC_RESOLV_MSG_DEPTH(); resolv_debug ("low_findprog %s: compilation ok\n", fname); break; #if constant(load_module) case ".so": if (fname == "") { werror( "low_findprog(\"%s\", \"%s\") => load_module(\"\")\n" "%s\n", pname, ext, describe_backtrace(backtrace()) ); } if (array|object err = catch (ret = load_module(fakeroot(fname)))) { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("low_findprog %s: failed to load binary\n", fname); objects[ret] = no_value; ret=programs[fname]=0; // Negative cache. compile_cb_rethrow (err); } resolv_debug ("low_findprog %s: loaded binary\n", fname); #endif /* load_module */ } AUTORELOAD_FINISH(ret,programs,fname); resolv_debug("low_findprog %s: returning %O\n", fname, ret); return programs[fname]=ret; } resolv_debug ("low_findprog %s: file not found\n", fname); return 0; } // // This function is called by the compiler when a delayed compilation // error occurs in the given program. It should remove all references // to the program so that it can be freed. // void unregister(program p) { if(string fname=search(programs,p)) { resolv_debug("unregister %s\n", fname); programs[fname] = no_value; fname = dirname (fname); object n; if ( fname!="" && objectp (n = fc[fname]) ) if (n->is_resolv_dirnode || n->is_resolv_joinnode) n->delete_value (p); } if (objectp (objects[p])) objects[p] = no_value; foreach (fc; string name; mixed mod) if (objectp(mod) && object_program(mod) == p) fc[name] = no_value; } static program findprog(string pname, string ext, object|void handler, void|int mkobj) { switch(ext) { case ".pike": case ".so": return low_findprog(pname,ext,handler, mkobj); default: pname+=ext; return low_findprog(pname,"", handler, mkobj) || low_findprog(pname,".pike", handler, mkobj) || low_findprog(pname,".so", handler, mkobj); } } program low_cast_to_program(string pname, string current_file, object|void handler, void|int mkobj) { string ext; string nname; // werror("low_cast_to_program(%O, %O, %O, %O)\n", // pname, current_file, handler, mkobj); if(sscanf(reverse(BASENAME(pname)),"%s.%s",ext, nname)) { ext="."+reverse(ext); pname=pname[..sizeof(pname)-sizeof(ext)-1]; } else { ext=""; } if(IS_ABSOLUTE_PATH(pname)) { program|NoValue prog = programs[pname]; if (programp (prog)) return prog; pname=combine_path("",pname); return findprog(pname,ext,handler,mkobj); } else { string cwd; if(current_file) { cwd=dirname(current_file); } else { cwd=getcwd(); } if(program ret=findprog(combine_path(cwd,pname),ext,handler,mkobj)) return ret; foreach(pike_program_path, string path) if(program ret=findprog(combine_path(path,pname),ext,handler,mkobj)) return ret; return 0; } } //! This function is called when the driver wants to cast a string //! to a program, this might be because of an explicit cast, an inherit //! or a implict cast. In the future it might receive more arguments, //! to aid the master finding the right program. program cast_to_program(string pname, string current_file, object|void handler) { resolv_debug ("cast_to_program(%O, %O)\n", pname, current_file); INC_RESOLV_MSG_DEPTH(); program ret = low_cast_to_program(pname, current_file, handler); DEC_RESOLV_MSG_DEPTH(); resolv_debug ("cast_to_program(%O, %O) => %O\n", pname, current_file, ret); if (programp (ret)) return ret; error("Cast %O to program failed%s.\n", pname, (current_file && current_file!="-") ? sprintf(" in %O",current_file) : ""); } //! This function is called when an error occurs that is not caught //! with catch(). void handle_error(array|object trace) { if(mixed x=catch { werror(describe_backtrace(trace)); }) { // One reason for this might be too little stack space, which // easily can occur for "out of stack" errors. It should help to // tune up the STACK_MARGIN values in interpret.c then. werror("Error in handle_error in master object:\n"); if(catch { catch { if (catch { string msg = [string]x[0]; array bt = [array]x[1]; werror("%s%O\n", msg, bt); }) { werror("%O\n", x); } }; werror("Original error:\n" "%O\n", trace); }) { werror("sprintf() failed to write error.\n"); } } } /* This array contains the names of the functions * that a replacing master-object may want to override. */ constant master_efuns = ({ "error", "basename", "dirname", "is_absolute_path", "explode_path", "compile_string", "compile_file", "add_include_path", "remove_include_path", "add_module_path", "remove_module_path", "add_program_path", "remove_program_path", "describe_backtrace", "describe_error", "get_backtrace", "normalize_path", "getenv", "putenv", #ifdef GETCWD_CACHE "cd", "getcwd", #endif }); string include_prefix; //! @decl int strlen(string|multiset|array|mapping|object thing) //! @appears strlen //! Alias for @[sizeof]. //! @deprecated sizeof //! @decl int write(string fmt, mixed ... args) //! @appears write //! Writes a string on stdout. Works just like @[Stdio.File.write] //! on @[Stdio.stdout]. /* Note that create is called before add_precompiled_program */ static void create() { foreach(master_efuns, string e) if (this[e]) add_constant(e, this[e]); else error("Function %O is missing from master.pike.\n", e); add_constant("strlen", sizeof); add_constant("write", Files()->_stdout->write); #define CO(X) add_constant(#X,Builtin.__backend->X) CO(call_out); CO(_do_call_outs); CO(find_call_out); CO(remove_call_out); CO(call_out_info); #if "¤share_prefix¤"[0]!='¤' // add path for architecture-independant files add_include_path("¤share_prefix¤/include"); add_module_path("¤share_prefix¤/modules"); #endif #if "¤lib_prefix¤"[0]!='¤' // add path for architecture-dependant files add_include_path("¤lib_prefix¤/include"); add_module_path("¤lib_prefix¤/modules"); #endif #if "¤include_prefix¤"[0]!='¤' include_prefix = "¤include_prefix¤"; #endif system_module_path=pike_module_path; } //! This function is called whenever a inherit is called for. //! It is supposed to return the program to inherit. //! The first argument is the argument given to inherit, and the second //! is the file name of the program currently compiling. Note that the //! file name can be changed with #line, or set by compile_string, so //! it can not be 100% trusted to be a filename. //! previous_object(), can be virtually anything in this function, as it //! is called from the compiler. program handle_inherit(string pname, string current_file, object|void handler) { resolv_debug ("handle_inherit(%O, %O)\n", pname, current_file); INC_RESOLV_MSG_DEPTH(); program ret = cast_to_program(pname, current_file, handler); DEC_RESOLV_MSG_DEPTH(); resolv_debug ("handle_inherit(%O, %O) => %O\n", pname, current_file, ret); return ret; } object low_cast_to_object(string oname, string current_file, object|void current_handler) { program p; object o; p = low_cast_to_program(oname, current_file, current_handler, 1); if(!p) return 0; // NB: p might be a function in a fake_object... if(!objectp (o=objects[p])) o=objects[p]=p(); return o; } //! This function is called when the drivers wants to cast a string //! to an object because of an implict or explicit cast. This function //! may also receive more arguments in the future. object cast_to_object(string oname, string current_file, object|void current_handler) { resolv_debug ("cast_to_object(%O, %O)\n", oname, current_file); INC_RESOLV_MSG_DEPTH(); object o = low_cast_to_object(oname, current_file, current_handler); DEC_RESOLV_MSG_DEPTH(); resolv_debug ("cast_to_object(%O, %O) => %O\n", oname, current_file, o); if (objectp (o)) return o; error("Cast %O to object failed%s.\n", oname, (current_file && current_file!="-") ? sprintf(" in %O",current_file) : ""); } // Marker used for negative caching in module caches. // FIXME: Won't this cause problems when inheriting "/master"? static class ZERO_TYPE {}; //! Module node representing a single directory. //! //! @seealso //! @[joinnode] class dirnode { string dirname; object|void compilation_handler; constant is_resolv_dirnode = 1; // objectp() is intentionally not used on the module object, to // allow a module to deny its own existence with `!. mixed module; mapping(string:mixed) cache=([]); mapping(string:array(string)) file_paths = ([]); #ifdef __NT__ #define FIX_CASE(X) lower_case(X) #else #define FIX_CASE(X) (X) #endif /* __NT__ */ static string base_from_filename(string fname) { string low_name = FIX_CASE(fname); if (has_prefix(low_name, ".#")) return 0; if (has_suffix(low_name, ".pike") || has_suffix(low_name, ".pmod")) { return fname[..sizeof(fname)-6]; } if (has_suffix(low_name, ".so")) { return fname[..sizeof(fname)-4]; } return 0; } static int prio_from_filename(string fname) { fname = FIX_CASE(fname); if (has_suffix(fname, ".pmod")) return 3; if (has_suffix(fname, ".so")) return 2; if (has_suffix(fname, ".pike")) return 1; // FIXME: Warn here? return 0; } static void create(string d, object|void h) { resolv_debug ("dirnode(%O,%O) created\n",d,h); dirname=d; compilation_handler=h; fc[dirname]=this; if(has_suffix(FIX_CASE(dirname),".pmod")) { fc[dirname[..sizeof(dirname)-6]]=this; } array(string) files = sort(get_dir(d)||({})); if (!sizeof(d)) return; array(string) bases = map(files, base_from_filename); files = filter(files, bases); bases = filter(bases, bases); resolv_debug("dirnode(%O,%O) got %d files.\n", d, h, sizeof(bases)); if (!sizeof(files)) return; foreach(files; int no; string fname) { fname = combine_path(dirname, fname); string base = bases[no]; if (base == "module") { // We need a module_checker. module = module_checker(); } array(string) paths = file_paths[base]; if (!paths) { // New entry. file_paths[base] = ({ fname }); continue; } // Multiple files. Order according to prio_from_filename(). // Insert sort. Worst case is 3 filenames. int prio = prio_from_filename(fname); int index; foreach(paths; index; string other_fname) { if (prio_from_filename(other_fname) <= prio) break; } file_paths[base] = paths[..index-1] + ({ fname }) + paths[index..]; } } class module_checker { int `!() { resolv_debug ("dirnode(%O)->module_checker()->`!()\n",dirname); INC_RESOLV_MSG_DEPTH(); if (mixed err = catch { // Look up module. if (module = cache["module"] || low_ind("module", 1)) { /* This allows for `[] to have side effects first time * it is called. (Specifically, the Calendar module uses * this). */ cache=([]); _cache_full=0; } DEC_RESOLV_MSG_DEPTH(); resolv_debug("dirnode(%O)->module_checker()->`!() => %s\n", dirname, !module ? "doesn't exist" : "exists"); return !module; }) { //werror ("findmodule error: " + describe_backtrace (err)); // findmodule() failed. This can occur due to circularities // between encode_value()'ed programs. // The error will then typically be: // "Cannot call functions in unfinished objects." // Pretend not to exist for now... DEC_RESOLV_MSG_DEPTH(); resolv_debug("dirnode(%O)->module_checker()->`!() => failure, doesn't exist\n", dirname); return 1; } } mixed `[](string index) { resolv_debug ("dirnode(%O)->module_checker()[%O] => %O\n", dirname, index, module && module[index]); return module && module[index]; } array(string) _indices() { if(module) return indices(module); } array _values() { if(module) return values(module); } } static mixed low_ind(string index, int(0..1)|void set_module) { array(string) paths; if (!(paths = file_paths[index])) { DEC_RESOLV_MSG_DEPTH(); resolv_debug("dirnode(%O)->ind(%O) => no file match\n", dirname, index); return UNDEFINED; } foreach(paths, string fname) { resolv_debug("dirnode(%O)->ind(%O) Trying file %O...\n", dirname, index, fname); Stat stat = master_file_stat(fakeroot(fname)); if (!stat) { resolv_debug("dirnode(%O)->ind(%O) file %O disappeared!\n", dirname, index, fname); continue; } if (has_suffix(fname, ".pmod")) { if (stat->isdir) { resolv_debug("dirnode(%O)->ind(%O) => found subdirectory %O\n", dirname, index, fname); return dirnode(fname, compilation_handler); } resolv_debug("dirnode(%O)->ind(%O) casting (object)%O\n", dirname, index, fname); // FIXME: cast_to_program() and cast_to_object() // have lots of overhead to guess the proper // filename. This overhead isn't needed in // our cases, so we could make do with // low_findprog() and the caches. mixed ret; if (objectp(ret = low_cast_to_object(fname, 0, compilation_handler))) { // This assignment is needed for eg the Calendar module. if (set_module) module = ret; if(mixed tmp=ret->_module_value) ret=tmp; DEC_RESOLV_MSG_DEPTH(); resolv_debug("dirnode(%O)->ind(%O) => found submodule %O:%O\n", dirname, index, fname, ret); return ret; } } else { resolv_debug("dirnode(%O)->ind(%O) casting (program)%O\n", dirname, index, fname); program ret; if (ret = low_cast_to_program(fname, 0, compilation_handler)) { DEC_RESOLV_MSG_DEPTH(); resolv_debug("dirnode(%O)->ind(%O) => found subprogram %O:%O\n", dirname, index, fname, ret); return ret; } } resolv_debug("dirnode(%O)->ind(%O) => failure for file %O\n", dirname, index, fname); } resolv_debug("dirnode(%O)->ind(%O) => UNDEFINED\n", dirname, index); return UNDEFINED; } static mixed ind(string index) { resolv_debug ("dirnode(%O)->ind(%O)\n", dirname, index); INC_RESOLV_MSG_DEPTH(); if (_cache_full) { DEC_RESOLV_MSG_DEPTH(); resolv_debug("dirnode(%O)->ind(%O) => cache_full %O\n", dirname, index, cache[index]); return cache[index]; } if(module) { mixed o; // _describe(module); if(!zero_type(o=module[index])) { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("dirnode(%O)->ind(%O) => found %O\n", dirname, index, o); return o; } resolv_debug ("dirnode(%O)->ind(%O) => not found in module\n", dirname, index); } else resolv_debug ("dirnode(%O)->ind(%O) => no module\n", dirname, index); return low_ind(index); } mixed `[](string index) { mixed ret; #ifdef MODULE_TRACE werror("%*nDirnode(%O) cache[%O] ?????\n", sizeof(backtrace()),dirname,index); #endif if(!zero_type(ret=cache[index])) { #ifdef MODULE_TRACE werror("%*nDirnode(%O) cache[%O] => %O%s\n", sizeof(backtrace()),dirname,index, ret, (ret != ZERO_TYPE)?"":" (zero_type)"); #endif if (ret != ZERO_TYPE) return ret; #ifdef MODULE_TRACE werror("%*nDirnode(%O) ZERO_TYPE!\n", sizeof(backtrace()),dirname); #endif return UNDEFINED; } ret=ind(index); // We might have gotten placeholder objects in the first pass // which must not be cached to the second. if(ret == predef::__placeholder_object) { #ifdef MODULE_TRACE werror("%*nDirnode(%O) PLACE_HOLDER.\n", sizeof(backtrace()),dirname); #endif return ret; } cache[index] = zero_type(ret) ? ZERO_TYPE : ret; return ret; } mixed safe_index(string index) { mixed err; if (err = catch { return `[](index); }) { call_compile_warning (compilation_handler, dirname+"."+fname, "Compilation failed: " + describe_error(err)); } return UNDEFINED; } static int(0..1) _cache_full; void fill_cache() { #if 0 werror(describe_backtrace(({ sprintf("Filling cache in dirnode %O\n", dirname), backtrace() }))); #endif if (_cache_full) { return; } // NOTE: We rely on side effects in `[]() and safe_index() // to fill the cache. // Why shouldn't thrown errors be propagated here? /mast if (module) { map(indices(module), safe_index); } map(indices(file_paths), safe_index); _cache_full = 1; } static array(string) _indices() { fill_cache(); // Note: Cannot index cache at all here to filter out the // ZERO_TYPE values since that can change the order in the // mapping, and _indices() has to return the elements in the same // order as a nearby _values() call. return filter (indices (cache), map (values (cache), `!=, ZERO_TYPE)); } static array(mixed) _values() { fill_cache(); return values(cache) - ({ZERO_TYPE}); } void delete_value (mixed val) { if (string name = search (cache, val)) { m_delete (cache, name); _cache_full = 0; } } static int(0..) _sizeof() { return sizeof(_values()); } static string _sprintf(int as) { return as=='O' && sprintf("master()->dirnode(%O)",dirname); } } //! Module node holding possibly multiple directories, //! and optionally falling back to another level. //! //! @seealso //! @[dirnode] class joinnode { constant is_resolv_joinnode = 1; array(object|mapping) joined_modules; mapping(string:mixed) cache=([]); object compilation_handler; // NOTE: Uses the empty mapping as the default fallback // for simplified code. joinnode|mapping(mixed:int(0..0)) fallback_module = ([]); string _sprintf(int as) { return as=='O' && sprintf("master()->joinnode(%O)",joined_modules); } static void create(array(object|mapping) _joined_modules, object|void _compilation_handler, joinnode|void _fallback_module) { joined_modules = _joined_modules; compilation_handler = _compilation_handler; fallback_module = _fallback_module || ([]); resolv_debug ("joinnode(%O) created\n", joined_modules); } void add_path(string path) { path = combine_path(getcwd(), path); dirnode node = fc[path] || (fc[path] = dirnode(path, compilation_handler)); if (sizeof(joined_modules) && joined_modules[0] == node) return; joined_modules = ({ node }) + (joined_modules - ({ node })); // FIXME: Propagate! } void rem_path(string path) { path = combine_path(getcwd(), path); joined_modules = filter(joined_modules, lambda(dirnode node) { return !objectp(node) || !node->is_resolv_dirnode || (node->dirname != path); }); // FIXME: What about the cache? // FIXME: Propagate! } static mixed ind(string index) { resolv_debug ("joinnode(%O)->ind(%O)\n", joined_modules, index); INC_RESOLV_MSG_DEPTH(); array(mixed) res = ({}); foreach(joined_modules, object|mapping o) { mixed ret; if (!zero_type(ret = o[index])) { if (objectp(ret) && (ret->is_resolv_dirnode || ret->is_resolv_joinnode)) { // Only join directorynodes (or joinnodes). res += ({ ret }); } else { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("joinnode(%O)->ind(%O) => found %O\n", joined_modules, index, ret); return (ret); } } } if (sizeof(res)) { DEC_RESOLV_MSG_DEPTH(); resolv_debug("joinnode(%O)->ind(%O) => new joinnode, fallback: %O\n", joined_modules, index, fallback_module[index]); return joinnode(res, compilation_handler, fallback_module[index]); } DEC_RESOLV_MSG_DEPTH(); resolv_debug ("joinnode(%O)->ind(%O) => not found. Trying fallback %O\n", joined_modules, index, fallback_module); return fallback_module[index]; } mixed `[](string index) { mixed ret; if (!zero_type(ret = cache[index])) { if (ret != ZERO_TYPE) { return ret; } return UNDEFINED; } ret = ind(index); // We might have gotten placeholder objects in the first pass // which must not be cached to the second. if(ret == predef::__placeholder_object) return ret; if (zero_type(ret)) { cache[index] = ZERO_TYPE; } else { cache[index] = ret; } return ret; } static int _cache_full; void fill_cache() { #if 0 werror(describe_backtrace(({ "Filling cache in joinnode\n", backtrace() }))); #endif if (_cache_full) { return; } foreach(joined_modules, object|mapping|program o) { foreach(indices(o), string index) { if (zero_type(cache[index])) { `[](index); } } } foreach(indices(fallback_module), string index) { `[](index); } _cache_full = 1; } array(string) _indices() { fill_cache(); // Note: Cannot index cache at all here to filter out the // ZERO_TYPE values since that can change the order in the // mapping, and _indices() has to return the elements in the same // order as a nearby _values() call. return filter (indices (cache), map (values (cache), `!=, ZERO_TYPE)); } array(mixed) _values() { fill_cache(); return values(cache) - ({ZERO_TYPE}); } void delete_value (mixed val) { if (string name = search (cache, val)) m_delete (cache, name); for (int i = 0; i < sizeof (joined_modules); i++) { object|mapping|program o = joined_modules[i]; if (o == val) { joined_modules = joined_modules[..i - 1] + joined_modules[i + 1..]; i--; } else if (objectp (o) && (o->is_resolv_dirnode || o->is_resolv_joinnode)) o->delete_value (val); else if (string name = mappingp (o) && search (o, val)) m_delete (o, name); } } int `== (mixed other) { return objectp (other) && other->is_resolv_joinnode && equal (mkmultiset (joined_modules), mkmultiset (other->joined_modules)); } array(object) _encode() { return joined_modules; } void _decode (array(object) joined_modules) { this_program::joined_modules = joined_modules; } }; joinnode handle_import(string path, string|void current_file, object|void current_handler) { #ifdef __amigaos__ if(path == ".") path = ""; #endif if(current_file) { path = combine_path_with_cwd(dirname(current_file), path); } else { path = combine_path_with_cwd(path); } // FIXME: Need caching!!! #if 0 // FIXME: This caching strategy could be improved, // since it ignores module_nodes from the // ordinary module tree. if (module_node_cache[current_handler]) { if (module_node_cache[current_handler][path]) { return module_node_cache[current_handler][path]; } } else { module_node_cache[current_handler] = ([]); } module_node node = module_node_cache[current_handler][path] = module_node("import::"+path, 0, current_handler); #endif /* 0 */ joinnode node = joinnode(({}), current_handler); #ifdef PIKE_MODULE_RELOC // If we have PIKE_MODULE_RELOC enabled, // we might need to map to multiple directories. if(path == "/${PIKE_MODULE_PATH}" || has_prefix(path, "/${PIKE_MODULE_PATH}/")) { string tmp = path[21..]; foreach(pike_module_path, string prefix) { node->add_path(sizeof(tmp)? combine_path(prefix, tmp) : prefix); } } else #endif /* PIKE_MODULE_RELOC */ node->add_path(path); return node; } // Probably not used anymore. program|object findmodule(string fullname, object|void handler) { program|object o; resolv_debug ("findmodule(%O)\n", fullname); if(!zero_type(o=fc[fullname]) && o != no_value) { if (objectp(o) || programp(o) || o != 0) { resolv_debug ("findmodule(%O) => found %O (cached)\n", fullname, o); return o; } resolv_debug ("findmodule(%O) => not found (cached)\n", fullname); return UNDEFINED; } if(Stat stat=master_file_stat(fakeroot(fullname+".pmod"))) { if(stat->isdir) { resolv_debug ("findmodule(%O) => new dirnode\n", fullname); return fc[fullname] = dirnode(fullname+".pmod", handler); } } INC_RESOLV_MSG_DEPTH(); if(objectp (o = low_cast_to_object(fullname+".pmod", "/.", handler))) { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("findmodule(%O) => got object %O\n", fullname, o); return fc[fullname]=o; } #if constant(load_module) if(master_file_stat(fakeroot(fullname+".so"))) { o = fc[fullname] = low_cast_to_object(fullname, "/.", handler); DEC_RESOLV_MSG_DEPTH(); resolv_debug ("findmodule(%O) => got .so object %O\n", fullname, o); return o; } #endif if (programp (o = low_cast_to_program(fullname, "/.", handler))) { DEC_RESOLV_MSG_DEPTH(); resolv_debug ("findmodule(%O) => got .pike program %O\n", fullname, o); return fc[fullname] = o; } DEC_RESOLV_MSG_DEPTH(); resolv_debug ("findmodule(%O) => not found\n", fullname); return fc[fullname] = 0; } #if 0 mixed handle_import(string what, string|void current_file, object|void handler) { string path; if(current_file) { path = combine_path_with_cwd(dirname(current_file), what); } else { path = combine_path_with_cwd(what); } #if 0 // If we can't cache the dirnode when we got a handler, then // findmodule has to be broken too. Good caching is necessary for // module dumping. /mast if (handler) { resolv_debug ("handle_import(%O, %O, %O) => new dirnode with handler\n", what, current_file, handler); return dirnode(path, handler); } #endif if(objectp (fc[path])) { resolv_debug ("handle_import(%O, %O) => found %O (cached)\n", what, current_file, fc[path]); return fc[path]; } resolv_debug ("handle_import(%O, %O) => new dirnode\n", what, current_file); #ifdef PIKE_MODULE_RELOC // If we have PIKE_MODULE_RELOC enabled, // we might need to map to a join node. // FIXME: Ought to use the non-relocate_module() fakeroot(). if(path == "/${PIKE_MODULE_PATH}" || has_prefix(path, "/${PIKE_MODULE_PATH}/")) { string tmp = path[21..]; array(dirnode) dirnodes = ({}); foreach(pike_module_path, string prefix) { string s2 = fakeroot(sizeof(tmp)? combine_path(prefix, tmp) : prefix); if(master_file_stat(s2)) dirnodes += ({ dirnode(s2, handler) }); } resolv_debug("handle_import(%O, %O) => Found %d dirnodes\n", what, current_file, sizeof(dirnodes)); if (sizeof(dirnodes) > 1) return fc[path] = joinnode(dirnodes); if (sizeof(dirnodes)) return fc[path] = dirnodes[0]; return UNDEFINED; } #endif /* PIKE_MODULE_RELOC */ return fc[path] = dirnode(fakeroot(path), handler); } #endif /* 0 */ multiset no_resolv = (<>); //! class CompatResolver { //! Actual resolver joinnode root_module = joinnode(({predef::_static_modules})); //! Lookup from handler module to corresponding root_module. mapping(object:joinnode) handler_root_modules = ([]); //! The pike system module path, not including any set by the user. array(string) system_module_path=({}); //! The complete module search path array(string) pike_module_path=({}); //! The complete include search path array(string) pike_include_path=({}); //! The complete program search path array(string) pike_program_path=({}); mapping(string:string) predefines = master()->initial_predefines; string ver; //! If we fail to resolv, try the fallback. //! //! Typical configuration: //! @pre{0.6->7.0->7.2->7.4->master@} CompatResolver fallback_resolver; //! The CompatResolver is initialized with a value that can be //! casted into a "%d.%d" string, e.g. a version object. //! //! It can also optionally be initialized with a fallback resolver. static void create(mixed version, CompatResolver|void fallback_resolver) { resolv_debug("CompatResolver(%O, %O)\n", version, fallback_resolver); ver=(string)version; #if 0 if (version) { root_module->symbol = ver + "::"; } #endif if (CompatResolver::fallback_resolver = fallback_resolver) { root_module->fallback_module = fallback_resolver->root_module; } predefines = initial_predefines; } //! Add a directory to search for include files. //! //! This is the same as the command line option @tt{-I@}. //! //! @note //! Note that the added directory will only be searched when using //! < > to quote the included file. //! //! @seealso //! @[remove_include_path()] //! void add_include_path(string tmp) { tmp=normalize_path(combine_path_with_cwd(tmp)); pike_include_path-=({tmp}); pike_include_path=({tmp})+pike_include_path; } //! Remove a directory to search for include files. //! //! This function performs the reverse operation of @[add_include_path()]. //! //! @seealso //! @[add_include_path()] //! void remove_include_path(string tmp) { tmp=normalize_path(combine_path_with_cwd(tmp)); pike_include_path-=({tmp}); } //! Add a directory to search for modules. //! //! This is the same as the command line option @tt{-M@}. //! //! @seealso //! @[remove_module_path()] //! void add_module_path(string tmp) { tmp=normalize_path(combine_path_with_cwd(tmp)); root_module->add_path(tmp); pike_module_path = ({ tmp }) + (pike_module_path - ({ tmp })); } //! Remove a directory to search for modules. //! //! This function performs the reverse operation of @[add_module_path()]. //! //! @seealso //! @[add_module_path()] //! void remove_module_path(string tmp) { tmp=normalize_path(combine_path_with_cwd(tmp)); root_module->rem_path(tmp); pike_module_path -= ({ tmp }); } //! Add a directory to search for programs. //! //! This is the same as the command line option @tt{-P@}. //! //! @seealso //! @[remove_program_path()] //! void add_program_path(string tmp) { tmp=normalize_path(combine_path_with_cwd(tmp)); pike_program_path-=({tmp}); pike_program_path=({tmp})+pike_program_path; } //! Remove a directory to search for programs. //! //! This function performs the reverse operation of @[add_program_path()]. //! //! @seealso //! @[add_program_path()] //! void remove_program_path(string tmp) { tmp=normalize_path(combine_path_with_cwd(tmp)); pike_program_path-=({tmp}); } //! Add a define (without arguments) which will be implicitly //! defined in @[cpp] calls. void add_predefine (string name, string value) { predefines[name] = value; } //! Remove a define from the set that are implicitly defined in //! @[cpp] calls. void remove_predefine (string name) { m_delete (predefines, name); } //! Returns a mapping with the current predefines. mapping get_predefines() { return predefines; } //! mapping get_default_module() { /* This is an ugly kluge to avoid an infinite recursion. * The infinite recursion occurs because this function is * called for every file when the compat_major/minor is set. * This kluge could cause problems with threads if the * compiler was threaded. -Hubbe */ int saved_compat_minor=compat_minor; int saved_compat_major=compat_major; compat_minor=-1; compat_major=-1; mixed x; mixed err =catch { if(resolv("__default") && (x=resolv("__default.all_constants"))) x=x(); }; compat_major=saved_compat_major; compat_minor=saved_compat_minor; if(err) throw(err); return x; } // _static_modules -- default for global:: // current_handler->get_default_module()->_static_modules joinnode get_root_module(object|void current_handler) { if (!root_module) { error("get_root_module(%O): No default root module!\n", current_handler); } if (!current_handler) return root_module; joinnode node = handler_root_modules[current_handler]; if (node) return node; // Check for _static_modules. mixed static_modules = _static_modules; if (current_handler->get_default_module) { mapping(string:mixed) default_module = current_handler->get_default_module(); if (default_module) { static_modules = default_module["_static_modules"] || ([]); } } node = joinnode(({ static_modules, // Copy relevant stuff from the root module. @filter(root_module->joined_modules, lambda(mixed x) { return objectp(x) && x->is_resolv_dirnode; }) }), current_handler, root_module->fallback_module); // FIXME: Is this needed? // Kluge to get _static_modules to work at top level. node->cache->_static_modules = static_modules; return node; } //! mixed resolv_base(string identifier, string|void current_file, object|void current_handler) { // werror("Resolv_base(%O)\n",identifier); return get_root_module(current_handler)[identifier]; } //! Same as @[resolv], but throws an error instead of returning //! @[UNDEFINED] if the resolv failed. mixed resolv_or_error(string identifier, string|void current_file, void|object current_handler) { mixed res = resolv(identifier, current_file, current_handler); if(zero_type(res)) error("Could not resolv %s.\n", identifier); return res; } //! mixed resolv(string identifier, string|void current_file, object|void current_handler) { resolv_debug("resolv(%O, %O)\n",identifier, current_file); INC_RESOLV_MSG_DEPTH(); // FIXME: Support having the cache in the handler? if( no_resolv[ identifier ] ) { DEC_RESOLV_MSG_DEPTH(); resolv_debug("resolv(%O, %O) => excluded\n",identifier, current_file); return UNDEFINED; } if (current_file && !stringp(current_file)) { error( "resolv(%O, %O, %O): current_file is not a string!\n", identifier, current_file, current_handler, backtrace() ); } array(string) tmp=identifier/"."; mixed ret = resolv_base(tmp[0], current_file, current_handler); foreach(tmp[1..],string index) { if (zero_type(ret)) break; ret = ret[index]; } DEC_RESOLV_MSG_DEPTH(); #ifdef RESOLV_DEBUG if (zero_type (ret)) resolv_debug("resolv(%O, %O) => not found\n",identifier, current_file); else resolv_debug("resolv(%O, %O) => found %O\n",identifier, current_file, ret); #endif /* RESOLV_DEBUG */ return ret; } //! This function is called whenever an #include directive is encountered //! it receives the argument for #include and should return the file name //! of the file to include string handle_include(string f, string current_file, int local_include) { if(local_include) { if(IS_ABSOLUTE_PATH(f)) return combine_path(f); return combine_path_with_cwd(dirname(current_file), f); } else { foreach(pike_include_path, string path) { path=combine_path(path,f); if(master_file_stat(fakeroot(path))) return path; } if (fallback_resolver) { return fallback_resolver->handle_include(f, current_file, local_include); } } // Failed. return 0; } //! string read_include(string f) { AUTORELOAD_CHECK_FILE(f); if (array|object err = catch { return master_read_file (f); }) compile_cb_rethrow (err); } string _sprintf(int t) { return t=='O' && sprintf("CompatResolver(%O)",ver); } } inherit CompatResolver; //! class Pike06Resolver { inherit CompatResolver; //! In Pike 0.6 the current directory was implicitly searched. mixed resolv_base(string identifier, string|void current_file, object|void current_handler) { if (current_file) { joinnode node = handle_import(".", current_file, current_handler); return node[identifier] || ::resolv_base(identifier, current_file, current_handler); } return ::resolv_base(identifier, current_file, current_handler); } } //! These are useful if you want to start other Pike processes //! with the same options as this one was started with. string _pike_file_name; string _master_file_name; // Gets set to 1 if we're in async-mode (script->main() returned <0) private int(0..1) _async=0; //! Returns 1 if we´re in async-mode, e.g. if the main method has //! returned a negative number. int(0..1) asyncp() { return _async; } #if constant(thread_create) // this must be done in __init if someone inherits the master static object _backend_thread=this_thread(); //! The backend_thread() function is useful to determine if you are //! the backend thread - important when doing async/sync protocols. //! This method is only available if thread_create is present. object backend_thread() { return _backend_thread; } #endif mapping(string:string) initial_predefines = ([]); //! This function is called when all the driver is done with all setup //! of modules, efuns, tables etc. etc. and is ready to start executing //! _real_ programs. It receives the arguments not meant for the driver //! and an array containing the environment variables on the same form as //! a C program receives them. void _main(array(string) orig_argv, array(string) env) { array(string) argv=copy_value(orig_argv); int debug,trace,run_tool; object tmp; string postparseaction=0; predefines = initial_predefines = Builtin()->_take_over_initial_predefines(); _pike_file_name = orig_argv[0]; #if constant(thread_create) _backend_thread = this_thread(); #endif foreach(env, string a) if( sscanf(a, "%s=%s", a, string b)==2 ) { #ifdef __NT__ if(a=="") { sscanf(b, "%s=%s", a, b); a="="+a; } #endif putenv(a, b); } else werror("Broken environment var %s\n",a); void _error(string a, mixed ... b) { werror(a, @b); exit(1); }; #ifndef NOT_INSTALLED { array parts = (getenv("PIKE_INCLUDE_PATH")||"")/PATH_SEPARATOR-({""}); int i = sizeof(parts); while(i) add_include_path(parts[--i]); parts = (getenv("PIKE_PROGRAM_PATH")||"")/PATH_SEPARATOR-({""}); i = sizeof(parts); while(i) add_program_path(parts[--i]); parts = (getenv("PIKE_MODULE_PATH")||"")/PATH_SEPARATOR-({""}); i = sizeof(parts); while(i) add_module_path(parts[--i]); } #endif // Some configure scripts depends on this format. string format_paths() { return ("master.pike...: " + (_master_file_name || __FILE__) + "\n" "Module path...: " + pike_module_path*"\n" " " + "\n" "Include path..: " + pike_include_path*"\n" " " + "\n" "Program path..: " + pike_program_path*"\n" " " + "\n"); }; mixed main_resolv(string ... syms) { mixed v = resolv(syms[0]); foreach(syms[1..], string sym) if(v) v = v[sym]; if(!v) _error("Could not resolv %s. (Perhaps the installed pike tree has been moved.)\n", syms*"."); return v; }; if(sizeof(argv)>1 && sizeof(argv[1]) && argv[1][0]=='-') { array q; tmp = main_resolv( "Getopt" ); int NO_ARG = tmp->NO_ARG; int MAY_HAVE_ARG = tmp->MAY_HAVE_ARG; int HAS_ARG = tmp->HAS_ARG; q=tmp->find_all_options(argv,({ ({"compat_version", HAS_ARG, ({"-V", "--compat"}), 0, 0}), ({"version", NO_ARG, ({"-v", "--version"}), 0, 0}), ({"dumpversion", NO_ARG, ({"--dumpversion"}), 0, 0}), ({"help", MAY_HAVE_ARG, ({"-h", "--help"}), 0, 0}), ({"features", NO_ARG, ({"--features"}), 0, 0}), ({"info", NO_ARG, ({"--info"}), 0, 0}), ({"execute", HAS_ARG, ({"-e", "--execute"}), 0, 0}), ({"debug_without", HAS_ARG, ({"--debug-without"}), 0, 0}), ({"preprocess", HAS_ARG, ({"-E", "--preprocess"}), 0, 0}), ({"modpath", HAS_ARG, ({"-M", "--module-path"}), 0, 0}), ({"ipath", HAS_ARG, ({"-I", "--include-path"}), 0, 0}), ({"ppath", HAS_ARG, ({"-P", "--program-path"}), 0, 0}), ({"showpaths", NO_ARG, ({"--show-paths"}), 0, 0}), ({"warnings", NO_ARG, ({"-w", "--warnings"}), 0, 0}), ({"nowarnings", NO_ARG, ({"-W", "--woff", "--no-warnings"}), 0, 0}), ({"autoreload", NO_ARG, ({"--autoreload"}), 0, 0}), ({"master", HAS_ARG, ({"-m"}), 0, 0}), ({"compiler_trace", NO_ARG, ({"--compiler-trace"}), 0, 0}), ({"assembler_debug",MAY_HAVE_ARG, ({"--assembler-debug"}), 0, 0}), ({"optimizer_debug",MAY_HAVE_ARG, ({"--optimizer-debug"}), 0, 0}), ({"debug", MAY_HAVE_ARG, ({"--debug"}), 0, 1}), ({"trace", MAY_HAVE_ARG, ({"--trace"}), 0, 1}), ({"ignore", MAY_HAVE_ARG, ({"-Dqdatplr"}), 0, 1}), ({"ignore", HAS_ARG, ({"-s"}), 0, 0}), ({"run_tool", NO_ARG, ({"-x"}), 0, 0}), }), 1); /* Parse -M and -I backwards */ for(int i=sizeof(q)-1; i>=0; i--) { switch(q[i][0]) { case "compat_version": sscanf(q[i][1],"%d.%d",compat_major,compat_minor); break; #ifdef PIKE_AUTORELOAD case "autoreload": autoreload_on++; break; #endif case "debug_without": // FIXME: Disable loading of dumped modules? foreach( q[i][1]/",", string feature ) { switch( feature ) { case "ttf": no_resolv[ "_Image_TTF" ] = 1; break; case "zlib": no_resolv[ "Gz" ] = 1; break; case "unisys": no_resolv[ "_Image_GIF" ] = 1; no_resolv[ "_Image_TIFF" ] = 1; break; case "threads": // not really 100% correct, but good enough for most things. no_resolv[ "Thread" ] = 1; add_constant( "thread_create" ); break; default: no_resolv[ feature ] = 1; break; } } break; case "debug": debug+=(int)q[i][1]; break; #if constant(_compiler_trace) case "compiler_trace": _compiler_trace(1); break; #endif /* constant(_compiler_trace) */ #if constant(_assembler_debug) case "assembler_debug": _assembler_debug((int)q[i][1]); break; #endif /* constant(_assembler_debug) */ #if constant(_optimizer_debug) case "optimizer_debug": _optimizer_debug((int)q[i][1]); break; #endif /* constant(_optimizer_debug) */ case "trace": trace+=(int)q[i][1]; break; case "modpath": add_module_path(q[i][1]); break; case "ipath": add_include_path(q[i][1]); break; case "ppath": add_program_path(q[i][1]); break; case "warnings": want_warnings++; break; case "nowarnings": want_warnings--; break; case "master": _master_file_name = q[i][1]; break; case "run_tool": run_tool = 1; break; } } foreach(q, array opts) { switch(opts[0]) { case "dumpversion": write("%d.%d.%d\n", __REAL_MAJOR__, __REAL_MINOR__, __REAL_BUILD__); exit(0); case "version": werror(version() + " Copyright © 1994-2004 Linköping University\n" "Pike comes with ABSOLUTELY NO WARRANTY; This is free software and you are\n" "welcome to redistribute it under certain conditions; Read the files\n" "COPYING and COPYRIGHT in the Pike distribution for more details.\n"); exit(0); case "help": werror( main_resolv("Tools","MasterHelp")->do_help(opts[1]) ); exit(0); case "features": postparseaction="features"; break; case "info": postparseaction="info"; break; case "showpaths": werror(format_paths()); exit(0); case "execute": #ifdef __AUTO_BIGNUM__ main_resolv( "Gmp", "bignum" ); #endif /* __AUTO_BIGNUM__ */ random_seed((time() ^ (getpid()<<8))); argv = tmp->get_args(argv,1); program prog; if(Version(compat_major,compat_minor) <= Version(7,4)) prog = compile_string( "mixed create(int argc, array(string) argv,array(string) env){"+ opts[1]+";}"); else prog = compile_string( "#define NOT(X) !(X)\n" "#define CHAR(X) 'X'\n" "mixed run(int argc, array(string) argv," "mapping(string:string) env){"+ opts[1]+";}"); #if constant(_debug) if(debug) _debug(debug); #endif if(trace) trace = predef::trace(trace); mixed ret; mixed err = catch { // One reason for this catch is to get a new call to // eval_instruction in interpret.c so that the debug and // trace levels set above take effect in the bytecode // evaluator. if(Version(compat_major,compat_minor) <= Version(7,4)) prog (sizeof(argv),argv,env); else ret = prog()->run(sizeof(argv),argv,getenv()); }; predef::trace(trace); if (err) { handle_error (err); ret = 10; } if(stringp(ret)) { write(ret); if(ret[-1]!='\n') write("\n"); } if(!intp(ret) || ret<0) ret=0; exit(ret); case "preprocess": #ifdef __AUTO_BIGNUM__ main_resolv( "Gmp", "bignum" ); #endif /* __AUTO_BIGNUM__ */ write(cpp(master_read_file(opts[1]),opts[1])); exit(0); } } argv = tmp->get_args(argv,1); } switch (postparseaction) { case "features": write( main_resolv( "Tools", "Install", "features" )()*"\n"+"\n" ); exit(0); case "info": write("Software......Pike\n" "Version......."+version()+"\n" "WWW...........http://pike.ida.liu.se/\n" "\n" "pike binary..."+_pike_file_name+"\n"+ format_paths() + "\n" "Features......"+ main_resolv( "Tools","Install","features" )()*"\n "+ "\n"); exit(0); } #ifdef __AUTO_BIGNUM__ main_resolv( "Gmp", "bignum" ); #endif /* __AUTO_BIGNUM__ */ random_seed(time() ^ (getpid()<<8)); if(sizeof(argv)==1) { if(run_tool) { werror("Pike -x specificed without tool name.\n" "Available tools:\n"); mapping t = ([]); int i; object ts = main_resolv( "Tools", "Standalone" ); foreach (indices(ts), string s) { mixed val = ts[s]; if (programp (val)) { object o = val(); if(!o->main) continue; t[s] = o->description || ""; i = max(i, sizeof(s)); } } foreach(sort(indices(t)), string s) werror(" %-"+i+"s %s\n", s, t[s]); exit(1); } main_resolv( "Tools", "Hilfe" )->StdinHilfe(); exit(0); } else argv=argv[1..]; program prog; if(run_tool) { mixed err = catch { prog=main_resolv( "Tools", "Standalone", argv[0] ); }; if (err) _error( "Pike: Failed to load tool %s:\n" "%s\n", argv[0], stringp(err[0])?err[0]:describe_backtrace(err) ); argv[0] = search(programs, prog) || argv[0]; } else { argv[0]=combine_path_with_cwd(argv[0]); mixed err = catch { prog=(program)argv[0]; }; if (err) _error( "Pike: Failed to compile script:\n" "%s\n", stringp(err[0])?err[0]:describe_backtrace(err) ); } if(!prog) _error("Pike: Couldn't find script to execute\n(%O)\n", argv[0]); #if constant(_debug) if(debug) _debug(debug); #endif if(trace) trace = predef::trace(trace); mixed ret; mixed err = catch { // The main reason for this catch is actually to get a new call // to eval_instruction in interpret.c so that the debug and // trace levels set above take effect in the bytecode evaluator. object script; if(Version(compat_major,compat_minor) <= Version(7,4)) { script=prog(); } else { script=prog(argv); } if(!script->main) _error("Error: %s has no main().\n", argv[0]); ret=script->main(sizeof(argv),argv,env); }; // Disable traceing. trace = predef::trace(trace); if (err) { handle_error (err); ret = 10; } if(!intp(ret)) { werror("Error: Non-integer value %O returned from main.\n", ret); exit(10); } if(ret >=0) exit([int]ret); _async=1; // Reenable tracing. trace = predef::trace(trace); while(1) { mixed err=catch { while(1) Builtin.__backend(3600.0); }; master()->handle_error(err); } } #if constant(thread_local) object inhibit_compile_errors = thread_local(); void set_inhibit_compile_errors(mixed f) { inhibit_compile_errors->set(f); } mixed get_inhibit_compile_errors() { return inhibit_compile_errors->get(); } #else /* !constant(thread_local) */ mixed inhibit_compile_errors; void set_inhibit_compile_errors(mixed f) { inhibit_compile_errors=f; } mixed get_inhibit_compile_errors() { return inhibit_compile_errors; } #endif /* constant(thread_local) */ static private function(string:string) _trim_file_name_cb=0; string trim_file_name(string s) { #ifdef PIKE_MODULE_RELOC s = relocate_module(s); #endif if(getenv("LONG_PIKE_ERRORS")) return s; if(getenv("SHORT_PIKE_ERRORS")) return BASENAME(s); if (_trim_file_name_cb) return _trim_file_name_cb(s); /* getcwd() can fail, but since this is called from handle_error(), * we don't want to fail, so we don't care about that. */ catch { string cwd=getcwd(); if (sizeof(cwd) && (cwd[-1] != '/')) { cwd += "/"; } if(has_prefix (s, cwd)) return s[sizeof(cwd)..]; }; return s; } function(string:string) set_trim_file_name_callback(function(string:string) s) { function(string:string) f=_trim_file_name_cb; _trim_file_name_cb=s; return f; } //! This function is called whenever a compile error occurs. @[line] //! is zero for errors that aren't associated with any specific line. //! @[err] is not newline terminated. void compile_error(string file,int line,string err) { mixed val; if(! (val = get_inhibit_compile_errors() )) { werror( "%s:%s:%s\n",trim_file_name(file), line?(string)line:"-",err ); } else if(objectp(val) || programp(val) || functionp(val)) { if (objectp(val) && val->compile_error) { val->compile_error(file, line, err); } else { val(file, line, err); } } } //! This function is called whenever a compile warning occurs. @[line] //! is zero for warnings that aren't associated with any specific //! line. @[err] is not newline terminated. void compile_warning(string file,int line,string err) { mixed val; if(!(val = get_inhibit_compile_errors() )) { if(want_warnings) werror( "%s:%s: Warning: %s\n",trim_file_name(file), line?(string)line:"-",err ); } else if (objectp(val) && val->compile_warning) { ([function(string,int,string:void)]([object]val) ->compile_warning)(file, line, err); } } //! This function is called when an exception is catched during //! compilation. Its message is also reported to @[compile_error] if //! this function returns zero. int compile_exception (array|object trace) { if (objectp (trace) && ( ([object]trace)->is_cpp_error || ([object]trace)->is_compilation_error)) // Errors thrown directly by cpp() and compile() are normally not // interesting; they've already been reported to compile_error. return 1; if (objectp (trace) && ([object] trace)->is_compile_callback_error) // Errors thrown by a compile callback that we should report as a // normal compile error, so let the caller do just that. return 0; if (mixed val = get_inhibit_compile_errors()) { if (objectp(val) && ([object]val)->compile_exception) return ([function(object:int)]([object]val) ->compile_exception)([object]trace); } else { handle_error (trace); return 1; } return 0; } //! Called for every runtime warning. The first argument identifies //! where the warning comes from, the second identifies the specific //! message, and the rest depends on that. See code below for currently //! implemented warnings. void runtime_warning (string where, string what, mixed... args) { if (want_warnings) switch (where + "." + what) { case "gc.bad_cycle": // args[0] is an array containing the objects in the cycle // which aren't destructed and have destroy() functions. #if 0 // Ignore this warning for now since we do not yet have a weak // modifier, so it can't be avoided in a reasonable way. werror ("GC warning: Garbing cycle where destroy() will be called " "in arbitrary order:\n%{ %s\n%}", sprintf("%O", args[0][*])); #endif break; default: werror ("%s warning: %s %O\n", capitalize (where), what, args); } } static object _charset_mod; //! This function is called by cpp() when it wants to do //! character code conversion. string decode_charset(string data, string charset) { if (!_charset_mod) { object mod = [object]resolv("Locale"); _charset_mod = [object](mod && mod["Charset"]); if (!_charset_mod) compile_cb_error ("Cannot handle charset - no Locale.Charset module found."); } if (mixed err = catch { object decoder = ([function(string:object)]_charset_mod->decoder)(charset); return ([function(void:string)]([function(string:object)]decoder-> feed)(data)->drain)(); }) compile_cb_rethrow (err); } class Describer { int clipped=0; int canclip=0; mapping(mixed:int|string) ident = ([]); int identcount = 0; void identify_parts (mixed stuff) { // Use an array as stack here instead of recursing directly; we // might be pressed for stack space if the backtrace being // described is a stack overflow. array identify_stack = ({stuff}); while (sizeof (identify_stack)) { stuff = identify_stack[-1]; identify_stack = identify_stack[..sizeof (identify_stack) - 2]; if (objectp (stuff) || functionp (stuff) || programp (stuff)) ident[stuff]++; else if (arrayp (stuff)) { if (!ident[stuff]++) identify_stack += stuff; } else if (multisetp (stuff)) { if (!ident[stuff]++) identify_stack += indices([multiset]stuff); } else if (mappingp (stuff)) { if (!ident[stuff]++) identify_stack += indices([mapping]stuff) + values([mapping]stuff); } } } string describe_string (string m, int maxlen) { canclip++; if(sizeof(m) < maxlen) { string t = sprintf("%O", m); if (sizeof(t) < (maxlen + 2)) return t; t = 0; } clipped++; if(maxlen>10) return sprintf("%O+[%d]",m[..maxlen-5],sizeof(m)-(maxlen-5)); return "string["+sizeof(m)+"]"; } string describe_array (array m, int maxlen) { if(!sizeof(m)) return "({})"; else { if(maxlen<5) { clipped++; return "array["+sizeof(m)+"]"; } else { canclip++; return "({" + describe_comma_list(m,maxlen-2) +"})"; } } } string describe_mapping (mapping m, int maxlen) { if(!sizeof(m)) return "([])"; else return "mapping["+sizeof(m)+"]"; } string describe_multiset (multiset m, int maxlen) { if(!sizeof(m)) return "(<>)"; else return "multiset["+sizeof(m)+"]"; } string describe (mixed m, int maxlen) { catch { if (stringp (ident[m])) return [string]ident[m]; else if (intp (ident[m]) && ident[m] > 1) ident[m] = "@" + identcount++; }; string res; if (catch (res=sprintf("%t",m))) res = "object"; // Object with a broken _sprintf(), probably. switch(res) { case "int": case "float": return (string)m; case "string": return describe_string ([string]m, maxlen); case "array": res = describe_array ([array]m, maxlen); break; case "mapping": res = describe_mapping ([mapping]m, maxlen); break; case "multiset": res = describe_multiset ([multiset]m, maxlen); break; case "function": if (string tmp=describe_function([function]m)) res = tmp; break; case "program": if(string tmp=describe_program([program]m)) res = tmp; break; default: /* object or type. */ if (catch { if(string tmp=sprintf("%O", m)) res = tmp; }) { // Extra paranoia case. res = sprintf("Instance of %O", _typeof(m)); } break; } if (stringp(ident[m])) return ident[m] + "=" + res; return res; } string describe_comma_list(array x, int maxlen) { string ret=""; if(!sizeof(x)) return ""; if(maxlen<0) return ",,,"+sizeof(x); int clip=min(maxlen/2,sizeof(x)); int len=maxlen; int done=0; while(1) { array(string) z=allocate(clip); array(int) isclipped=allocate(clip); array(int) clippable=allocate(clip); for(int e=0;e<clip;e++) { clipped=0; canclip=0; z[e]=describe(x[e],len); isclipped[e]=clipped; clippable[e]=canclip; } while(1) { string ret = z[..clip-1]*","; if(done || sizeof(ret)<=maxlen+1) { int tmp=sizeof(x)-clip-1; clipped=`+(0,@isclipped); if(tmp>=0) { clipped++; ret+=",,,"+tmp; } canclip++; return ret; } int last_newlen=len; int newlen; int clipsuggest; while(1) { int smallsize=0; int num_large=0; clipsuggest=0; for(int e=0;e<clip;e++) { if((sizeof(z[e])>=last_newlen || isclipped[e]) && clippable[e]) num_large++; else smallsize+=sizeof(z[e]); if(num_large * 15 + smallsize < maxlen) clipsuggest=e+1; } newlen=num_large ? (maxlen-smallsize)/num_large : 0; if(newlen<8 || newlen >= last_newlen) break; last_newlen=newlen; } if(newlen < 8 && clip) { clip-= (clip/4) || 1; if(clip > clipsuggest) clip=clipsuggest; }else{ len=newlen; done++; break; } } } return ret; } } string program_path_to_name ( string path, void|string module_prefix, void|string module_suffix, void|string object_suffix ) //! Converts a module path on the form @expr{"Foo.pmod/Bar.pmod"@} or //! @expr{"/path/to/pike/lib/modules/Foo.pmod/Bar.pmod"@} to a module //! identifier on the form @expr{"Foo.Bar"@}. //! //! If @[module_prefix] or @[module_suffix] are given, they are //! prepended and appended, respectively, to the returned string if //! it's a module file (i.e. ends with @expr{".pmod"@} or //! @expr{".so"@}). If @[object_suffix] is given, it's appended to the //! returned string if it's an object file (i.e. ends with //! @expr{".pike"@}). { array(string) sort_paths_by_length(array(string) paths) { sort(map(paths, sizeof), paths); return reverse(paths); }; if (path == "/master") return "master" + (object_suffix || ""); foreach(sort_paths_by_length(map(pike_module_path - ({""}), lambda(string s) { if (s[-1] == '/') return s; return s+"/"; })), string prefix) { if (has_prefix(path, prefix)) { path = path[sizeof(prefix)..]; break; } } #if 0 // This seems broken. Why should the current directory or the // setting of SHORT_PIKE_ERRORS etc affect the module identifiers? // /mast path = trim_file_name(path); #endif string modname = replace(path, ".pmod/", "."); if(search(modname, "/")<0) path=modname; if (has_suffix(path, ".module.pmod")) { return (module_prefix || "") + path[..sizeof(path)-13] + (module_suffix || ""); } if (has_suffix(path, ".pmod")) { return (module_prefix || "") + path[..sizeof(path)-6] + (module_suffix || ""); } if (has_suffix(path, ".so")) { return (module_prefix || "") + path[..sizeof(path)-4] + (module_suffix || ""); } if (has_suffix(path, ".pike")) { return path[..sizeof(path)-6] + (object_suffix || ""); } return path + (object_suffix || ""); } //! Describe the path to the module @[mod]. //! //! @param mod //! If @[mod] is a program, attempt to describe the path //! to a clone of @[mod]. //! //! @param ret_obj //! If an instance of @[mod] is found, it will be returned //! by changing element @expr{0@} of @[ret_obj]. //! //! @returns //! The a description of the path. //! //! @note //! The returned description will end with a proper indexing method //! currently either @expr{"."@} or @expr{"->"@}. string describe_module(object|program mod, array(object)|void ret_obj) { // Note: mod might be a bignum object; objectp won't work right for // our purposes. object_program returns zero for non-objects, so we // use it instead. program parent_fun = object_program(mod); if (parent_fun) { if (ret_obj) ret_obj[0] = mod; } else if (programp (mod)) { parent_fun = mod; // When running with debug we might be called before __INIT, so // we have to check if objects exists before we use it. if (objects && objectp (mod = objects[parent_fun]) && ret_obj) ret_obj[0] = mod; } else return ""; // efun if (mod) { catch { string res = sprintf("%O", mod); if (res != "object" && res != "") return (objectp (objects[parent_fun]) && programs["/master"] != parent_fun? res+".":res+"->"); }; } if (!object_program(parent_fun)) { // We might be a top-level entity. if (string path = programs_reverse_lookup (parent_fun)) return program_path_to_name(path, "", ".", "()->"); } // Begin by describing our parent. array(object) parent_obj = ({ 0 }); string res = describe_module(function_object(parent_fun)|| function_program(parent_fun)|| object_program(parent_fun), parent_obj); // werror("So far: %O parent_obj:%O\n", res, parent_obj); object|program parent = object_program (parent_obj[0]) ? parent_obj[0] : object_program(parent_fun); if (mod && (object_program (parent) || parent)) { // Object identified. catch { // Check if we're an object in parent. int i = search(values(parent), mod); if (i >= 0) { return res + [string]indices(parent)[i] + "."; } }; } // We're cloned from something in parent. if (string fun_name = function_name(parent_fun)) { return res + fun_name + "()->"; } // No such luck. // Try identifying a clone of ourselves. if (!mod && (object_program (parent) || parent)) { catch { // Check if there's a clone of parent_fun in parent_obj. int i; array(mixed) val = values(parent); array(string) ind = [array(string)]indices(parent); for (i=0; i < sizeof(val); i++) { if (object_program(val[i]) && object_program(val[i]) == parent_fun) { return res + ind[i] + "."; } } }; } // We're really out of luck here... return res + (describe_program(parent_fun)||"unknown_program") + "()->"; } //! string describe_object(object o) { string s; if(zero_type (o)) return 0; // Destructed. if (o == _static_modules) return "_static_modules"; program|function(mixed...:void|object) parent_fun = object_program(o); /* Constant object? */ catch { object|program parent_obj = (function_object(parent_fun) || function_program(parent_fun)); if (objectp (parent_obj) || parent_obj) { /* Check if we have a constant object. */ object tmp = objects[parent_obj]; if (objectp (tmp)) parent_obj = tmp; /* Try finding ourselves in parent_obj. */ int i = search(values(parent_obj), o); if (i >= 0) { s = [string]indices(parent_obj)[i]; return describe_module(parent_obj) + s; } } }; if(objectp (objects[parent_fun])) if ((s = programs_reverse_lookup (parent_fun)) && (s=program_path_to_name(s, "", "", "()"))) return s; /* Try identifying the program. */ if(( s=describe_program(parent_fun) )) return s+"()"; return 0; } //! string describe_program(program|function p) { string s; if(!p) return 0; if (p == object_program (_static_modules)) return "object_program(_static_modules)"; if(programp(p) && (s = programs_reverse_lookup ([program] p)) && (s=program_path_to_name(s, "object_program(", ")", ""))) return s; if(object|program tmp=(function_object(p) || function_program(p))) { if(s = function_name(p)) { return describe_module(tmp) + s; } } if(s=Builtin()->program_defined(p)) return BASENAME(s); return 0; } //! string describe_function (function f) { if (!f) return 0; string name; if(string s = programs_reverse_lookup (f)) { if(has_suffix(s, ".pmod")) name = BASENAME(s[..sizeof(s)-6]); else name = trim_file_name(s); } else if (catch (name = function_name (f))) name = "function"; object o = function_object([function(mixed...:void|mixed)]f); if(object_program (o)) { // Check if it's an object in a way that // (hopefully) doesn't call any functions // in it (neither `== nor `!). string s; if (!catch (s = sprintf("%O",o)) && s != "object") return s+"->"+name; } return name; } /* It is possible that this should be a real efun, * it is currently used by handle_error to convert a backtrace to a * readable message. */ //! @appears describe_backtrace //! Return a readable message that describes where the backtrace //! @[trace] was made (by @[backtrace]). //! //! It may also be an error object or array (typically caught by a //! @[catch]), in which case the error message also is included in the //! description. //! //! @seealso //! @[backtrace()], @[describe_error()], @[catch()], @[throw()] //! string describe_backtrace(array|object trace, void|int linewidth) { int e; string ret; int backtrace_len=((int)getenv("PIKE_BACKTRACE_LEN")) || bt_max_string_len; if(!linewidth) { linewidth=99999; catch { linewidth=[int]Files()->_stdin->tcgetattr()->columns; }; if(linewidth<10) linewidth=99999; } // Note: Partial code duplication in describe_error and get_backtrace. if (objectp(trace) && ([object]trace)->is_generic_error) { object err_obj = [object] trace; if (mixed err = catch { if (functionp (err_obj->message)) ret = err_obj->message(); else if (zero_type (ret = err_obj->error_message)) // For compatibility with error objects trying to behave // like arrays. ret = err_obj[0]; if (!ret) ret = ""; else if (!stringp (ret)) ret = sprintf ("<Message in %O is %t, expected string>\n", err_obj, ret); if (functionp (err_obj->backtrace)) trace = err_obj->backtrace(); else if (zero_type (trace = err_obj->error_backtrace)) // For compatibility with error objects trying to behave // like arrays. trace = err_obj[1]; if (!trace) return ret + "<No backtrace>\n"; else if (!arrayp (trace)) return sprintf ("%s<Backtrace in %O is %t, expected array>\n", ret, err_obj, trace); }) return sprintf ("<Failed to index backtrace object %O: %s>\n", err_obj, trim_all_whites (describe_error (err))); } else if (arrayp(trace)) { if (sizeof([array]trace)==2 && stringp(ret = ([array]trace)[0])) { trace = ([array] trace)[1]; if(!trace) return ret + "<No backtrace>\n"; else if (!arrayp (trace)) return sprintf ("%s<Backtrace in error array is %t, expected array>\n", ret, trace); } } else return sprintf ("<Invalid backtrace/error container: %O>\n", trace); { Describer desc = Describer(); array trace = [array]trace; int end = 0; if( (sizeof(trace)>1) && arrayp(trace[0]) && (sizeof([array]trace[0]) > 2) && (([array]trace[0])[2] == _main)) end = 1; mapping(string:int) prev_pos = ([]); array(string) frames = ({}); int loop_start = 0, loop_next, loops; for(e = sizeof(trace)-1; e>=end; e--) { mixed tmp; string row; if (array err=[array]catch { tmp = trace[e]; if(stringp(tmp)) { row=[string]tmp; } else if(arrayp(tmp)) { if(sprintf("%t",tmp)=="object") { // tmp is backtrace_frame desc->identify_parts( tmp->args ); } else desc->identify_parts( tmp ); array tmp = [array]tmp; string pos; if(sizeof(tmp)>=2 && stringp(tmp[0])) { if (intp(tmp[1])) { pos=trim_file_name([string]tmp[0])+":"+(string)tmp[1]; } else { pos = sprintf("%s:Bad line %t", trim_file_name([string]tmp[0]), tmp[1]); } }else{ string desc="Unknown program"; if(sizeof(tmp)>=3 && functionp(tmp[2])) { catch { if(mixed tmp=function_object([function(mixed...: void|mixed)]tmp[2])) if(tmp=object_program(tmp)) if(tmp=describe_program([program]tmp)) desc=[string]tmp; }; } pos=desc; } string data; if(sizeof(tmp)>=3) { if(functionp(tmp[2])) { data = describe_function ([function]tmp[2]); } else if (stringp(tmp[2])) { data = [string]tmp[2]; } else data ="unknown function"; data+="("+ desc->describe_comma_list(tmp[3..], backtrace_len)+ ")"; if(sizeof(pos)+sizeof(data) < linewidth-4) { row=sprintf("%s: %s",pos,data); }else{ row=sprintf("%s:\n%s",pos,sprintf(" %*-/s",linewidth-6,data)); } } else { row = pos; } } else { if (tmp) { if (catch (row = sprintf("%O", tmp))) row = describe_program(object_program(tmp)) + " with broken _sprintf()"; } else { row = "Destructed object"; } } }) { row = sprintf("Error indexing backtrace line %d: %s (%O)!", e, err[0], err[1]); } int dup_frame; if (!zero_type(dup_frame = prev_pos[row])) { dup_frame -= sizeof(frames); if (!loop_start) { loop_start = dup_frame; loop_next = dup_frame + 1; loops = 0; continue; } else { int new_loop = 0; if (!loop_next) loop_next = loop_start, new_loop = 1; if (dup_frame == loop_next++) { loops += new_loop; continue; } } } prev_pos[row] = sizeof(frames); if (loop_start) { array(string) tail; if (!loop_next) tail = ({}), loops++; else tail = frames[loop_start + sizeof(frames) .. loop_next - 1 + sizeof(frames)]; if (loops) frames += ({sprintf ("... last %d frames above repeated %d times ...\n", -loop_start, loops)}); frames += tail; prev_pos = ([]); loop_start = 0; } frames += ({row + "\n"}); } if (loop_start) { // Want tail to contain a full loop rather than being empty; it // looks odd when the repeat message ends the backtrace. array(string) tail = frames[loop_start + sizeof(frames) .. loop_next - 1 + sizeof(frames)]; if (loops) frames += ({sprintf("... last %d frames above repeated %d times ...\n", -loop_start, loops)}); frames += tail; } ret += frames * ""; } return ret; } //! @appears describe_error //! //! Return the error message from an error object or array (typically //! caught by a @[catch]). //! //! If an error message couldn't be obtained, a fallback message //! describing the failure is returned. No errors due to incorrectness //! in @[err] are thrown. //! //! @seealso //! @[describe_backtrace()], @[get_backtrace] //! string describe_error (object|array err) { mixed msg; // Note: Partial code duplication in describe_backtrace and get_backtrace. if (objectp(err) && ([object]err)->is_generic_error) { object err_obj = [object] err; if (mixed err = catch { if (functionp (err_obj->message)) msg = err_obj->message(); else if (zero_type (msg = err_obj->error_message)) // For compatibility with error objects trying to behave // like arrays. msg = err_obj[0]; if (stringp (msg)) return msg; else if (!msg) return "<No error message>\n"; else return sprintf ("<Message in %O is %t, expected string>\n", err_obj, msg); }) return sprintf ("<Failed to index error object %O: %s>\n", err_obj, trim_all_whites (describe_error (err))); } else if (arrayp(err) && sizeof([array]err)==2 && (!(msg = ([array]err)[0]) || stringp (msg))) return [string] msg || "<No error message>\n"; else return sprintf ("<Invalid error container: %O>\n", err); } //! @appears get_backtrace //! //! Return the backtrace array from an error object or array //! (typically caught by a @[catch]), or zero if there is none. Errors //! are thrown on if there are problems retrieving the backtrace. //! //! @seealso //! @[describe_backtrace()], @[describe_error()] //! array get_backtrace (object|array err) { array bt; // Note: Partial code duplication in describe_backtrace and describe_error. if (objectp(err) && ([object]err)->is_generic_error) { object err_obj = [object] err; if (functionp (err_obj->backtrace)) bt = err_obj->backtrace(); else if (zero_type (bt = err_obj->error_backtrace)) // For compatibility with error objects trying to behave like // arrays. bt = err_obj[1]; if (bt && !arrayp (bt)) error ("Backtrace in %O is %t, expected array.\n", err_obj, bt); } else if (arrayp(err) && sizeof([array]err)==2 && (!(bt = ([array]err)[1]) || arrayp (bt))) {} else if (err) error ("Invalid error container: %O\n", err); return bt; } #ifdef ENCODE_DEBUG # define ENC_MSG(X...) do werror (X); while (0) # define ENC_RETURN(val) do { \ mixed _v__ = (val); \ werror (" returned %s\n", \ zero_type (_v__) ? "UNDEFINED" : \ sprintf ("%O", _v__)); \ return _v__; \ } while (0) #else # define ENC_MSG(X...) do {} while (0) # define ENC_RETURN(val) do return (val); while (0) #endif #ifdef DECODE_DEBUG # define DEC_MSG(X...) do werror (X); while (0) # define DEC_RETURN(val) do { \ mixed _v__ = (val); \ werror (" returned %s\n", \ zero_type (_v__) ? "UNDEFINED" : \ sprintf ("%O", _v__)); \ return _v__; \ } while (0) #else # define DEC_MSG(X...) do {} while (0) # define DEC_RETURN(val) do return (val); while (0) #endif class Encoder //! Codec for use with @[encode_value]. It understands all the //! standard references to builtin functions and pike modules. //! //! The format of the produced identifiers are documented here to //! allow extension of this class: //! //! The produced names are either strings or arrays. The string //! variant specifies the thing to look up according to the first //! character: //! //! 'c' Look up in all_constants(). //! 's' Look up in _static_modules. //! 'r' Look up with resolv(). //! 'p' Look up in programs. //! 'o' Look up in programs, then look up the result in objects. //! 'f' Look up in fc. //! //! In the array format, the first element is a string as above and //! the rest specify a series of things to do with the result: //! //! A string Look up this string in the result. //! 'm' Get module object in dirnode. //! 'p' Do object_program(result). //! //! All lowercase letters and the symbols ':', '/' and '.' are //! reserved for internal use in both cases where characters are used //! above. { mixed encoded; static mapping(mixed:string) rev_constants = ([]); static mapping(mixed:string) rev_static_modules = ([]); static array find_index (object|program parent, mixed child, array(object) module_object) { array id; find_id: { array inds = indices (parent), vals = values (parent); int i = search (vals, child); if (i >= 0 && parent[inds[i]] == child) { id = ({inds[i]}); ENC_MSG (" found as parent value with index %O\n", id[0]); } else { // Try again with the programs of the objects in parent, since // it's common that only objects and not their programs are // accessible in modules. foreach (vals; i; mixed val) if (objectp (val) && child == object_program (val) && val == parent[inds[i]]) { if (module_object) { module_object[0] = val; id = ({inds[i]}); } else id = ({inds[i], 'p'}); ENC_MSG (" found as program of parent value object %O with index %O\n", val, id[0]); break find_id; } error ("Cannot find %O in %O.\n", child, parent); } } if (!stringp (id[0])) error ("Got nonstring index %O for %O in %O.\n", id[0], child, parent); return id; } static string|array compare_resolved (string name, mixed what, mixed resolved, array(object) module_object) { array append; compare: { if (resolved == what) { ENC_MSG (" compare_resolved: %O is %O\n", what, resolved); break compare; } if (objectp (resolved)) { if (object_program (resolved) == what) { ENC_MSG (" compare_resolved: %O is program of %O\n", what, resolved); append = ({'p'}); break compare; } if (resolved->is_resolv_dirnode) if (resolved->module == what) { ENC_MSG (" compare_resolved: %O is dirnode module of %O\n", what, resolved); append = ({'m'}); resolved = resolved->module; break compare; } else if (object_program (resolved->module) == what) { ENC_MSG (" compare_resolved: %O is program of dirnode module of %O\n", what, resolved); append = ({'m', 'p'}); break compare; } else ENC_MSG (" compare_resolved: %O is different from dirnode module %O\n", what, resolved->module); #if 0 // This is only safe if the joinnode modules don't conflict, // and we don't know that. if (resolved->is_resolv_joinnode) { ENC_MSG (" compare_resolved: searching for %O in joinnode %O\n", what, resolved); foreach (resolved->joined_modules, mixed part) if (string|array name = compare_resolved (name, what, part, module_object)) { if (module_object) module_object[0] = resolved; return name; } } #endif } ENC_MSG (" compare_resolved: %O is different from %O\n", what, resolved); return 0; } name = "r" + name; string|array res = has_value (name, ".") ? name / "." : name; if (append) if (module_object) { // The caller is going to do subindexing. In both the 'p' and // 'm' cases it's better to do that from the original // object/dirnode, so just drop the suffixes. module_object[0] = resolved; return res; } else return (arrayp (res) ? res : ({res})) + append; else return res; } string|array nameof (mixed what, void|array(object) module_object) //! When @[module_object] is set and the name would end with an //! @expr{object_program@} step (i.e. @expr{'p'@}), then drop that //! step so that the name corresponds to the object instead. //! @expr{@[module_object][0]@} will receive the found object. { ENC_MSG ("nameof (%t %O)\n", what, what); if (what == encoded) { ENC_MSG (" got the thing to encode - encoding recursively\n"); return UNDEFINED; } if (string id = rev_constants[what]) ENC_RETURN (id); if (string id = rev_static_modules[what]) ENC_RETURN (id); if (objectp (what)) { if (what->is_resolv_dirnode) { ENC_MSG (" is a dirnode\n"); string name = program_path_to_name (what->dirname); if (string|array ref = compare_resolved (name, what, resolv (name), module_object)) ENC_RETURN (ref); } else if (what->is_resolv_joinnode) { ENC_MSG (" is a joinnode\n"); object modules = Builtin.array_iterator (what->joined_modules); object|mapping value; check_dirnode: if (modules && objectp (value = modules->value()) && value->is_resolv_dirnode) { string name = program_path_to_name (value->dirname); modules += 1; foreach (modules;; value) if (!objectp (value) || !value->is_resolv_dirnode || program_path_to_name (value->dirname) != name) break check_dirnode; ENC_MSG (" joinnode has consistent name %O\n", name); if (string|array ref = compare_resolved (name, what, resolv (name), module_object)) ENC_RETURN (ref); } } program prog; if ((prog = objects_reverse_lookup (what))) ENC_MSG (" found program in objects: %O\n", prog); #if 0 else if ((prog = object_program (what))) ENC_MSG (" got program of object: %O\n", prog); #endif if (prog) { if (prog == encoded) ENC_RETURN ("o"); if (string path = programs_reverse_lookup (prog)) { ENC_MSG (" found path in programs: %O\n", path); string name = program_path_to_name (path); if (string|array ref = compare_resolved (name, what->_module_value || what, resolv (name), module_object)) ENC_RETURN (ref); else { ENC_MSG (" Warning: Failed to resolve; encoding path\n"); #ifdef PIKE_MODULE_RELOC ENC_RETURN ("o" + unrelocate_module (path)); #else ENC_RETURN ("o" + path); #endif } } } if (string path = fc_reverse_lookup (what)) { ENC_MSG (" found path in fc: %O\n", path); string name = program_path_to_name (path); if (string|array ref = compare_resolved (name, what, resolv (name), module_object)) ENC_RETURN (ref); else { ENC_MSG (" Warning: Failed to resolve; encoding path\n"); #ifdef PIKE_MODULE_RELOC ENC_RETURN ("f" + unrelocate_module (path)); #else ENC_RETURN ("f" + path); #endif } } if (what->_encode) { ENC_MSG (" object got _encode function - encoding recursively\n"); return UNDEFINED; } if (function|program prog = object_program (what)) { ENC_MSG (" got program of object: %O\n", prog); if (object|program parent = function_object (prog) || function_program (prog)) { ENC_MSG (" got parent of program: %O\n", parent); // We're going to subindex the parent so we ask for the // module object and not the program. That since we'll // always be able to do a better job if we base the indexing // on objects. array parent_object = ({0}); string|array parent_name = nameof (parent, parent_object); if (!parent_name) { ENC_MSG (" inside the thing to encode - encoding recursively\n"); return UNDEFINED; } else { if (objectp (parent_object[0])) parent = parent_object[0]; array id = find_index (parent, what, module_object); if (equal (id, ({"_module_value"}))) ENC_RETURN (parent_name); else ENC_RETURN ((arrayp (parent_name) ? parent_name : ({parent_name})) + id); } } } error ("Failed to find name of unencodable object %O.\n", what); } if (programp (what) || functionp (what)) { if (string path = programs_reverse_lookup (what)) { ENC_MSG (" found path in programs: %O\n", path); string name = program_path_to_name (path); if (string|array ref = compare_resolved (name, what, resolv (name), module_object)) ENC_RETURN (ref); else { ENC_MSG (" Warning: Failed to resolve; encoding path\n"); #ifdef PIKE_MODULE_RELOC ENC_RETURN ("p" + unrelocate_module (path)); #else ENC_RETURN ("p" + path); #endif } } if (object|program parent = function_object (what) || function_program (what)) { ENC_MSG (" got parent: %O\n", parent); if (!objectp (parent)) { object parent_obj = objects[parent]; if (objectp (parent_obj)) { ENC_MSG (" found object for parent program in objects: %O\n", parent_obj); parent = parent_obj; } } array parent_object = ({0}); string|array parent_name = nameof (parent, parent_object); if (!parent_name) { ENC_MSG (" inside the thing to encode - encoding recursively\n"); return UNDEFINED; } else { if (objectp (parent_object[0])) parent = parent_object[0]; if (parent["_module_value"] == what && objects_reverse_lookup (parent)) { ENC_MSG (" found as _module_value of parent module\n"); ENC_RETURN (parent_name); } else { string|array id = function_name (what); if (stringp (id) && parent[id] == what) { ENC_MSG (" found function name in parent: %O\n", id); id = ({id}); } else id = find_index (parent, what, module_object); if (equal (id, ({"_module_value"}))) ENC_RETURN (parent_name); else ENC_RETURN ((arrayp (parent_name) ? parent_name : ({parent_name})) + id); } } } error ("Failed to find name of %t %O.\n", what, what); } // FIXME: Should have a reverse mapping of constants in modules; // it can potentially be large mappings and stuff that we encode // here. They can go stale too. ENC_MSG (" encoding recursively\n"); return ([])[0]; } mixed encode_object(object x) { DEC_MSG ("encode_object (%O)\n", x); if(!x->_encode) error ("Cannot encode object %O without _encode function.\n", x); DEC_RETURN (([function]x->_encode)()); } static void create (void|mixed encoded) //! Creates an encoder instance. If @[encoded] is specified, it's //! encoded instead of being reverse resolved to a name. That's //! necessary to encode programs. { this_program::encoded = encoded; foreach (all_constants(); string var; mixed val) rev_constants[val] = "c" + var; rev_static_modules = mkmapping (values (_static_modules), map (indices (_static_modules), lambda (string name) {return "s" + name;})); #if 0 // This looks flawed; when the decoder looks it up, it'll get the // module and not its program. /mast foreach (rev_static_modules; mixed module; string name) { if (objectp(module)) { program p = object_program(module); if (!rev_static_modules[p]) { // Some people inherit modules... rev_static_modules[p] = "s" + name; } } } #endif } } class Decoder (void|string fname, void|int mkobj) //! Codec for use with @[decode_value]. This is the decoder //! corresponding to @[Encoder]. See that one for more details. { static int unregistered = 1; object __register_new_program(program p) { DEC_MSG ("__register_new_program (%O)\n", p); if(unregistered && fname) { unregistered = 0; resolv_debug("register %s\n", fname); programs[fname]=p; if (mkobj) DEC_RETURN (objectp (objects[p]) ? objects[p] : (objects[p]=__null_program())); } DEC_RETURN (0); } static mixed thingof (string|array what) { mixed res; array sublist; if (arrayp (what)) sublist = what, what = sublist[0]; switch (what[0]) { case 'c': if (zero_type (res = all_constants()[what[1..]])) error ("Cannot find global constant %O.\n", what[1..]); break; case 's': if (zero_type (res = _static_modules[what[1..]])) error ("Cannot find %O in _static_modules.\n", what[1..]); break; case 'r': if (zero_type (res = resolv (what[1..]))) error ("Cannot resolve %O.\n", what[1..]); break; case 'p': if (!(res = low_cast_to_program (what[1..], fname, this))) error ("Cannot find program for %O.\n", what[1..]); break; case 'o': if (!objectp (res = low_cast_to_object (what[1..], fname, this))) error ("Cannot find object for %O.\n", what[1..]); break; case 'f': if (!objectp (res = findmodule (what[1..], this))) error ("Cannot find module for %O.\n", what[1..]); break; } DEC_MSG (" got %O\n", res); if (sublist) { mixed subres = res; for (int i = 1; i < sizeof (sublist); i++) { mixed op = sublist[i]; if (stringp (op)) { if (!programp (subres) && !objectp (subres) && !mappingp (subres)) error ("Cannot subindex %O%{[%O]%} since it's a %t.\n", res, sublist[1..i-1], subres); if (zero_type (subres = subres[op])) error ("Cannot find %O in %O%{[%O]%}.\n", op, res, sublist[1..i-1]); DEC_MSG (" indexed with %O: %O\n", op, subres); } else switch (op) { case 'm': if (objectp (subres) && subres->is_resolv_joinnode) { dirnode found; foreach (subres->joined_modules, object|mapping part) if (objectp (part) && part->is_resolv_dirnode && part->module) { if (found) error ("There are ambiguous module objects in %O.\n", subres); else found = part; } if (found) subres = found; } if (objectp (subres) && subres->is_resolv_dirnode) { if (subres->module) { subres = subres->module; DEC_MSG (" got dirnode module %O\n", subres); } else error ("Cannot find module object in dirnode %O.\n", subres); } else error ("Cannot get module object in thing that isn't " "a dirnode or unambiguous joinnode: %O\n", subres); break; case 'p': subres = object_program (subres); DEC_MSG (" got object_program %O\n", subres); break; default: error ("Unknown sublist operation %O in %O\n", op, what); } } res = subres; } return res; } object objectof (string|array what) { DEC_MSG ("objectof (%O)\n", what); if (!what) { // This is necessary for compatibility with 7.2 encoded values: // If an object was fed to encode_value there and there was no // codec then a zero would be encoded silently since the failed // call to nameof was ignored. decode_value would likewise // silently ignore the failed call objectof(0) and a zero would // be decoded. Now we supply a fairly capable codec which is // used by default and we therefore get these objectof(0) calls // here. So if we throw an error we can't decode values which // 7.2 would encode and decode without a codec (albeit partly // incorrectly). So just print a sulky warning and continue.. :P werror ("Warning: Decoded broken object identifier to zero.\n"); DEC_RETURN (0); } DEC_RETURN ([object] thingof (what)); } function functionof (string|array what) { DEC_MSG ("functionof (%O)\n", what); DEC_RETURN ([function] thingof (what)); } program programof (string|array what) { DEC_MSG ("programof (%O)\n", what); DEC_RETURN ([program] thingof (what)); } void decode_object(object o, mixed data) { DEC_MSG ("decode_object (object(%O), %O)\n", object_program (o), data); if(!o->_decode) error ("Cannot decode object(%O) without _decode function.\n", object_program (o)); ([function(mixed:void)]o->_decode)(data); } } mapping(string:Codec) codecs = set_weak_flag(([]),1); Codec get_codec(string|void fname, int|void mkobj) { string key = fname + "\0" + mkobj; if (codecs[key]) return codecs[key]; return codecs[key] = Decoder(fname, mkobj); } class Codec //! @[Encoder] and @[Decoder] rolled into one. This is for mainly //! compatibility; there's typically no use combining encoding and //! decoding into the same object. { inherit Encoder; inherit Decoder; static void create (void|mixed encoded) //! The optional argument is the thing to encode; it's passed on to //! @[Encoder]. { Encoder::create (encoded); } } // The master acts as the default codec. inherit Codec; //! Contains version information about a Pike version. class Version { //! The major and minor parts of the version. int major; int minor; //! @decl void create(int major, int minor) //! Set the version in the object. static void create(int maj, int min) { if(maj==-1) maj = __REAL_MAJOR__; if(min==-1) min = __REAL_MINOR__; major = maj; minor = min; } #define CMP(X) ((major - ([object]X)->major) || (minor - ([object]X)->minor)) //! Methods define so that version objects //! can be compared and ordered. int `<(mixed v) { return objectp(v) && CMP(v) < 0; } int `>(mixed v) { return objectp(v) && CMP(v) > 0; } int `==(mixed v) { return objectp(v) && CMP(v)== 0; } int _hash() { return major * 4711 + minor ; } string _sprintf(int t) { switch(t) { case 's': return sprintf("%d.%d",major,minor); case 'O': return sprintf("%O(%s)", this_program, this); } } //! The version object can be casted into a string. mixed cast(string type) { switch(type) { case "string": return sprintf("%d.%d",major,minor); } } } //! Version information about the current Pike version. Version currentversion=Version(__MAJOR__,__MINOR__); mapping(Version:CompatResolver) compat_handler_cache = set_weak_flag( ([]), 1); CompatResolver get_compilation_handler(int major, int minor) { Version v=Version(major,minor); if(v > currentversion) { /* do we want to make an error if major.minor > __MAJOR__.__MINOR ? */ return 0; } CompatResolver ret; if(!zero_type(ret=compat_handler_cache[v])) return ret; array(string) files; array(Version) available=({}); #if "¤share_prefix¤"[0]!='¤' if (!(files = get_dir("¤share_prefix¤"))) { werror ("Error listing directory %O: %s\n", "¤share_prefix¤", strerror (errno())); files = ({}); } foreach(files, string ver) { if(sscanf(ver,"%d.%d",int maj, int min)) { Version x=Version(maj, min) ; if(x >= v) available|=({ x }); } } #endif #if "¤lib_prefix¤"[0]!='¤' if (!(files = get_dir("¤lib_prefix¤"))) { werror ("Error listing directory %O: %s\n", "¤lib_prefix¤", strerror (errno())); files = ({}); } foreach(files, string ver) { if(sscanf(ver,"%d.%d",int maj, int min)) { Version x=Version(maj, min) ; if(x >= v) available|=({ x }); } } #endif sort(available); #ifndef RESOLVER_HACK /* We need to define RESOLVER_HACK when we add * version-specific stuff in the CompatResolver. * As long as all the compatibility is done in the * module dierctories, RESOLVER_HACK can be undefined */ /* No compat needed */ if(!sizeof(available)) { compat_handler_cache[v]=0; return 0; } /* Same as available[0] */ if(ret=compat_handler_cache[available[0]]) return compat_handler_cache[v]=ret; #endif // The root resolver is this object. ret = this; foreach(reverse(available), Version tmp) { CompatResolver compat_handler = compat_handler_cache[tmp]; if (!compat_handler) { // Create a new compat handler, that // falls back to the successor version. if (tmp <= Version(0, 6)) { compat_handler = Pike06Resolver(tmp, ret); } else { compat_handler = CompatResolver(tmp, ret); } string base; #if "¤lib_prefix¤"[0]!='¤' base=combine_path("¤lib_prefix¤",sprintf("%s",tmp)); compat_handler->add_module_path(combine_path(base,"modules")); compat_handler->add_include_path(combine_path(base,"include")); #endif #if "¤share_prefix¤"[0]!='¤' base=combine_path("¤share_prefix¤",sprintf("%s",tmp)); compat_handler->add_module_path(combine_path(base,"modules")); compat_handler->add_include_path(combine_path(base,"include")); #endif #ifndef RESOLVER_HACK ret = compat_handler_cache[tmp] = compat_handler; #endif } } // Note: May duplicate the assignment above. compat_handler_cache[v] = ret; return ret; } string _sprintf(int t) { switch(t) { case 't': return "master"; case 'O': return "master()"; } }

pike.git/ lib/ master.pike.in > b440ab1e0f04324c639a48adc3a721e61ca23d0f [Annotate]