pike.git/ src/ modules/ zlibmod/ zlibmod.c > 8c5bb290d9199409e848597d629a27fdab299f0a [Annotate]

/*\ 

||| This file a part of Pike, and is copyright by Fredrik Hubinette 

||| Pike is distributed as GPL (General Public License) 

||| See the files COPYING and DISCLAIMER for more information. 

\*/ 

#include "global.h" 

RCSID("$Id: zlibmod.c,v 1.1 1996/11/16 05:17:15 hubbe Exp $"); 

#include "zlib_machine.h" 

#include "types.h" 

#if !defined(HAVE_LIBZ) && !defined(HAVE_LIBGZ) 

#undef HAVE_ZLIB_H 

#endif 

#ifdef HAVE_ZLIB_H 

#include "interpret.h" 

#include "svalue.h" 

#include "stralloc.h" 

#include "array.h" 

#include "macros.h" 

#include "program.h" 

#include "stralloc.h" 

#include "object.h" 

#include "pike_types.h" 

#include "threads.h" 

#include "dynamic_buffer.h" 

#include <zlib.h> 

struct zipper 

{ 

  struct z_stream_s gz; 

  DEFINE_MUTEX(lock); 

}; 

#define BUF 16384 

#define THIS ((struct zipper *)(fp->current_storage)) 

static void gz_deflate_create(INT32 args) 

{ 

  int level=Z_DEFAULT_COMPRESSION; 

  if(THIS->gz.state) 

  { 

    mt_lock(& this->lock); 

    deflateEnd(&THIS->gz); 

    mt_unlock(& this->lock); 

  } 

  if(args) 

  { 

    if(sp[-args].type != T_INT) 

      error("Bad argument 1 to gz->create()\n"); 

    if(sp[-args].u.integer < Z_NO_COMPRESSION || 

       sp[-args].u.integer > Z_BEST_COMPRESSION) 

    { 

      error("Compression level out of range for gz_deflate->create()\n"); 

    } 

  } 

  THIS->gz.zalloc=Z_NULL; 

  THIS->gz.zfree=Z_NULL; 

  THIS->gz.opaque=THIS; 

  pop_n_elems(args); 

  mt_lock(& THIS->lock); 

  level=deflateInit(&THIS->gz, level); 

  mt_unlock(& THIS->lock); 

  switch(level) 

  { 

  case Z_OK: 

    return; 

  case Z_VERSION_ERROR: 

    error("libz not compatible with zlib.h!!!\n"); 

    break; 

  default: 

    if(THIS->gz.msg) 

      error("Failed to initialize gz_deflate: %s\n",THIS->gz.msg); 

    else 

      error("Failed to initialize gz_deflate\n"); 

  } 

} 

static int do_deflate(dynamic_buffer *buf, 

                      struct zipper *this, 

                      int flush) 

{ 

  int fail=0; 

  THREADS_ALLOW(); 

  mt_lock(& this->lock); 

  if(!this->gz.state) 

  { 

    fail=Z_STREAM_ERROR; 

  }else{ 

    do 

      { 

        char *loc; 

        int ret; 

        loc=low_make_buf_space(BUF,buf); 

        this->gz.next_out=(Bytef *)loc; 

        this->gz.avail_out=BUF; 

        ret=deflate(& this->gz, flush); 

        low_make_buf_space(-this->gz.avail_out,buf); 

        if(ret != Z_OK) 

          { 

            fail=ret; 

            break; 

          } 

      } while(!this->gz.avail_out || flush==Z_FINISH || this->gz.avail_in); 

  } 

  mt_unlock(& this->lock); 

  THREADS_DISALLOW(); 

  return fail; 

} 

static void gz_deflate(INT32 args) 

{ 

  struct pike_string *data; 

  int flush, fail; 

  struct zipper *this=THIS; 

  dynamic_buffer buf; 

  if(!THIS->gz.state) 

    error("gz_deflate not initialized or destructed\n"); 

  initialize_buf(&buf); 

  if(args<1) 

    error("Too few arguments to gz_deflate->deflate()\n"); 

  if(sp[-args].type != T_STRING) 

    error("Bad argument 1 to gz_deflate->deflate()\n"); 

  data=sp[-args].u.string; 

  if(args>1) 

  { 

    if(sp[1-args].type != T_INT) 

      error("Bad argument 2 to gz_deflate->deflate()\n"); 

    flush=sp[1-args].u.integer; 

    switch(flush) 

    { 

    case Z_PARTIAL_FLUSH: 

    case Z_FINISH: 

    case Z_SYNC_FLUSH: 

    case Z_NO_FLUSH: 

      break; 

    defualt: 

      error("Argument 2 to gz_deflate->deflate() out of range.\n"); 

    } 

  }else{ 

    flush=Z_NO_FLUSH; 

  } 

  this->gz.next_in=(Bytef *)data->str; 

  this->gz.avail_in=data->len; 

  fail=do_deflate(&buf,this,flush); 

  pop_n_elems(args); 

  if(fail != Z_OK && fail != Z_STREAM_END) 

  { 

    free(buf.s.str); 

    if(THIS->gz.msg) 

      error("Error in gz_deflate->deflate(): %s\n",THIS->gz.msg); 

    else 

      error("Error in gz_deflate->deflate(): %d\n",fail); 

  } 

  push_string(low_free_buf(&buf)); 

} 

static void init_gz_deflate(struct object *o) 

{ 

  mt_init(& THIS->locked); 

  MEMSET(& THIS->gz, 0, sizeof(THIS->gz)); 

  THIS->gz.zalloc=Z_NULL; 

  THIS->gz.zfree=Z_NULL; 

  THIS->gz.opaque=THIS; 

  deflateInit(& THIS->gz, Z_DEFAULT_COMPRESSION); 

} 

static void exit_gz_deflate(struct object *o) 

{ 

  mt_lock(& THIS->lock); 

  deflateEnd(&THIS->gz); 

  mt_unlock(& THIS->lock); 

} 

/*******************************************************************/ 

static void gz_inflate_create(INT32 args) 

{ 

  int level; 

  if(THIS->gz.state) 

  { 

    mt_lock(this->lock); 

    inflateEnd(&THIS->gz); 

    mt_unlock(this->lock); 

  } 

  THIS->gz.zalloc=Z_NULL; 

  THIS->gz.zfree=Z_NULL; 

  THIS->gz.opaque=THIS; 

  pop_n_elems(args); 

  mt_lock(THIS->lock); 

  level=inflateInit(& THIS->gz); 

  mt_unlock(THIS->lock); 

  switch(level) 

  { 

  case Z_OK: 

    return; 

  case Z_VERSION_ERROR: 

    error("libz not compatible with zlib.h!!!\n"); 

    break; 

  default: 

    if(THIS->gz.msg) 

      error("Failed to initialize gz_inflate: %s\n",THIS->gz.msg); 

    else 

      error("Failed to initialize gz_inflate\n"); 

  } 

} 

static int do_inflate(dynamic_buffer *buf, 

                      struct zipper *this, 

                      int flush) 

{ 

  int fail=0; 

  THREADS_ALLOW(); 

  mt_lock(this->lock); 

  if(!this->gz.state) 

  { 

    fail=Z_STREAM_ERROR; 

  }else{ 

    do 

    { 

      char *loc; 

      int ret; 

      loc=low_make_buf_space(BUF,buf); 

      this->gz.next_out=(Bytef *)loc; 

      this->gz.avail_out=BUF; 

      ret=inflate(& this->gz, flush); 

      low_make_buf_space(-this->gz.avail_out,buf); 

      if(ret != Z_OK) 

        { 

          fail=ret; 

          break; 

        } 

    } while(!this->gz.avail_out || flush==Z_FINISH || this->gz.avail_in); 

  } 

  mt_unlock(this->lock); 

  THREADS_DISALLOW(); 

  return fail; 

} 

static void gz_inflate(INT32 args) 

{ 

  struct pike_string *data; 

  int fail; 

  struct zipper *this=THIS; 

  dynamic_buffer buf; 

  if(!THIS->gz.state) 

    error("gz_inflate not initialized or destructed\n"); 

  initialize_buf(&buf); 

  if(args<1) 

    error("Too few arguments to gz_inflate->inflate()\n"); 

  if(sp[-args].type != T_STRING) 

    error("Bad argument 1 to gz_inflate->inflate()\n"); 

  data=sp[-args].u.string; 

  this->gz.next_in=(Bytef *)data->str; 

  this->gz.avail_in=data->len; 

  fail=do_inflate(&buf,this,Z_PARTIAL_FLUSH); 

  pop_n_elems(args); 

  if(fail != Z_OK && fail != Z_STREAM_END) 

  { 

    free(buf.s.str); 

    if(THIS->gz.msg) 

      error("Error in gz_inflate->inflate(): %s\n",THIS->gz.msg); 

    else 

      error("Error in gz_inflate->inflate(): %d\n",fail); 

  } 

  push_string(low_free_buf(&buf)); 

  if(fail == Z_STREAM_END && !sp[-1].u.string->len) 

  { 

    pop_stack(); 

    push_int(0); 

  } 

} 

static void init_gz_inflate(struct object *o) 

{ 

  mt_init(THIS->locked); 

  MEMSET(& THIS->gz, 0, sizeof(THIS->gz)); 

  THIS->gz.zalloc=Z_NULL; 

  THIS->gz.zfree=Z_NULL; 

  THIS->gz.opaque=0; 

  inflateInit(&THIS->gz); 

  inflateEnd(&THIS->gz); 

} 

static void exit_gz_inflate(struct object *o) 

{ 

  mt_lock(& THIS->lock); 

  inflateEnd(& THIS->gz); 

  mt_unlock(& THIS->lock); 

} 

#endif 

void init_zlibmod_efuns(void) {} 

void exit_zlibmod(void) { } 

void init_zlibmod_programs(void) 

{ 

#ifdef HAVE_ZLIB_H 

  start_new_program(); 

  add_storage(sizeof(struct zipper)); 

  add_function("create",gz_deflate_create,"function(int|void:void)",0); 

  add_function("deflate",gz_deflate,"function(string,int|void:string)",0); 

  add_integer_constant("NO_FLUSH",Z_NO_FLUSH,0); 

  add_integer_constant("PARTIAL_FLUSH",Z_PARTIAL_FLUSH,0); 

  add_integer_constant("SYNC_FLUSH",Z_SYNC_FLUSH,0); 

  add_integer_constant("FINISH",Z_FINISH,0); 

  set_init_callback(init_gz_deflate); 

  set_exit_callback(exit_gz_deflate); 

  end_c_program("/precompiled/gz_deflate"); 

  start_new_program(); 

  add_storage(sizeof(struct zipper)); 

  add_function("create",gz_inflate_create,"function(int|void:void)",0); 

  add_function("inflate",gz_inflate,"function(string:string)",0); 

  add_integer_constant("NO_FLUSH",Z_NO_FLUSH,0); 

  add_integer_constant("PARTIAL_FLUSH",Z_PARTIAL_FLUSH,0); 

  add_integer_constant("SYNC_FLUSH",Z_SYNC_FLUSH,0); 

  add_integer_constant("FINISH",Z_FINISH,0); 

  set_init_callback(init_gz_inflate); 

  set_exit_callback(exit_gz_inflate); 

  end_c_program("/precompiled/gz_inflate"); 

#endif 

}