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c34c1fcbb1
zlib/contrib/minizip/zip.c
Mark Adler c34c1fcbb1 zlib 1.1.2
2011-09-09 23:20:15 -07:00

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/* zip.c -- IO on .zip files using zlib
Version 0.15 beta, Mar 19th, 1998,
Read zip.h for more info
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zlib.h"
#include "zip.h"
#ifdef STDC
# include <stddef.h>
# include <string.h>
# include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
extern int errno;
#else
# include <errno.h>
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#ifndef VERSIONMADEBY
# define VERSIONMADEBY (0x0) /* platform depedent */
#endif
#ifndef Z_BUFSIZE
#define Z_BUFSIZE (16384)
#endif
#ifndef Z_MAXFILENAMEINZIP
#define Z_MAXFILENAMEINZIP (256)
#endif
#ifndef ALLOC
# define ALLOC(size) (malloc(size))
#endif
#ifndef TRYFREE
# define TRYFREE(p) {if (p) free(p);}
#endif
/*
#define SIZECENTRALDIRITEM (0x2e)
#define SIZEZIPLOCALHEADER (0x1e)
*/
/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
#ifndef SEEK_CUR
#define SEEK_CUR 1
#endif
#ifndef SEEK_END
#define SEEK_END 2
#endif
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
const char zip_copyright[] =
" zip 0.15 Copyright 1998 Gilles Vollant ";
#define SIZEDATA_INDATABLOCK (4096-(4*4))
#define LOCALHEADERMAGIC (0x04034b50)
#define CENTRALHEADERMAGIC (0x02014b50)
#define ENDHEADERMAGIC (0x06054b50)
#define FLAG_LOCALHEADER_OFFSET (0x06)
#define CRC_LOCALHEADER_OFFSET (0x0e)
#define SIZECENTRALHEADER (0x2e) /* 46 */
typedef struct linkedlist_datablock_internal_s
{
struct linkedlist_datablock_internal_s* next_datablock;
uLong avail_in_this_block;
uLong filled_in_this_block;
uLong unused; /* for future use and alignement */
unsigned char data[SIZEDATA_INDATABLOCK];
} linkedlist_datablock_internal;
typedef struct linkedlist_data_s
{
linkedlist_datablock_internal* first_block;
linkedlist_datablock_internal* last_block;
} linkedlist_data;
typedef struct
{
z_stream stream; /* zLib stream structure for inflate */
int stream_initialised; /* 1 is stream is initialised */
uInt pos_in_buffered_data; /* last written byte in buffered_data */
uLong pos_local_header; /* offset of the local header of the file
currenty writing */
char* central_header; /* central header data for the current file */
uLong size_centralheader; /* size of the central header for cur file */
uLong flag; /* flag of the file currently writing */
int method; /* compression method of file currenty wr.*/
Byte buffered_data[Z_BUFSIZE];/* buffer contain compressed data to be writ*/
uLong dosDate;
uLong crc32;
} curfile_info;
typedef struct
{
FILE * filezip;
linkedlist_data central_dir;/* datablock with central dir in construction*/
int in_opened_file_inzip; /* 1 if a file in the zip is currently writ.*/
curfile_info ci; /* info on the file curretly writing */
uLong begin_pos; /* position of the beginning of the zipfile */
uLong number_entry;
} zip_internal;
local linkedlist_datablock_internal* allocate_new_datablock()
{
linkedlist_datablock_internal* ldi;
ldi = (linkedlist_datablock_internal*)
ALLOC(sizeof(linkedlist_datablock_internal));
if (ldi!=NULL)
{
ldi->next_datablock = NULL ;
ldi->filled_in_this_block = 0 ;
ldi->avail_in_this_block = SIZEDATA_INDATABLOCK ;
}
return ldi;
}
local void free_datablock(ldi)
linkedlist_datablock_internal* ldi;
{
while (ldi!=NULL)
{
linkedlist_datablock_internal* ldinext = ldi->next_datablock;
TRYFREE(ldi);
ldi = ldinext;
}
}
local void init_linkedlist(ll)
linkedlist_data* ll;
{
ll->first_block = ll->last_block = NULL;
}
local void free_linkedlist(ll)
linkedlist_data* ll;
{
free_datablock(ll->first_block);
ll->first_block = ll->last_block = NULL;
}
local int add_data_in_datablock(ll,buf,len)
linkedlist_data* ll;
const void* buf;
uLong len;
{
linkedlist_datablock_internal* ldi;
const unsigned char* from_copy;
if (ll==NULL)
return ZIP_INTERNALERROR;
if (ll->last_block == NULL)
{
ll->first_block = ll->last_block = allocate_new_datablock();
if (ll->first_block == NULL)
return ZIP_INTERNALERROR;
}
ldi = ll->last_block;
from_copy = (unsigned char*)buf;
while (len>0)
{
uInt copy_this;
uInt i;
unsigned char* to_copy;
if (ldi->avail_in_this_block==0)
{
ldi->next_datablock = allocate_new_datablock();
if (ldi->next_datablock == NULL)
return ZIP_INTERNALERROR;
ldi = ldi->next_datablock ;
ll->last_block = ldi;
}
if (ldi->avail_in_this_block < len)
copy_this = (uInt)ldi->avail_in_this_block;
else
copy_this = (uInt)len;
to_copy = &(ldi->data[ldi->filled_in_this_block]);
for (i=0;i<copy_this;i++)
*(to_copy+i)=*(from_copy+i);
ldi->filled_in_this_block += copy_this;
ldi->avail_in_this_block -= copy_this;
from_copy += copy_this ;
len -= copy_this;
}
return ZIP_OK;
}
local int write_datablock(fout,ll)
FILE * fout;
linkedlist_data* ll;
{
linkedlist_datablock_internal* ldi;
ldi = ll->first_block;
while (ldi!=NULL)
{
if (ldi->filled_in_this_block > 0)
if (fwrite(ldi->data,(uInt)ldi->filled_in_this_block,1,fout)!=1)
return ZIP_ERRNO;
ldi = ldi->next_datablock;
}
return ZIP_OK;
}
/****************************************************************************/
/* ===========================================================================
Outputs a long in LSB order to the given file
nbByte == 1, 2 or 4 (byte, short or long)
*/
local int ziplocal_putValue (file, x, nbByte)
FILE *file;
uLong x;
int nbByte;
{
unsigned char buf[4];
int n;
for (n = 0; n < nbByte; n++) {
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
if (fwrite(buf,nbByte,1,file)!=1)
return ZIP_ERRNO;
else
return ZIP_OK;
}
local void ziplocal_putValue_inmemory (dest, x, nbByte)
void* dest;
uLong x;
int nbByte;
{
unsigned char* buf=(unsigned char*)dest;
int n;
for (n = 0; n < nbByte; n++) {
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
}
/****************************************************************************/
local uLong ziplocal_TmzDateToDosDate(ptm,dosDate)
tm_zip* ptm;
uLong dosDate;
{
uLong year = (uLong)ptm->tm_year;
if (year>1980)
year-=1980;
else if (year>80)
year-=80;
return
(uLong) (((ptm->tm_mday) + (32 * (ptm->tm_mon+1)) + (512 * year)) << 16) |
((ptm->tm_sec/2) + (32* ptm->tm_min) + (2048 * (uLong)ptm->tm_hour));
}
/****************************************************************************/
extern zipFile ZEXPORT zipOpen (pathname, append)
const char *pathname;
int append;
{
zip_internal ziinit;
zip_internal* zi;
ziinit.filezip = fopen(pathname,(append == 0) ? "wb" : "ab");
if (ziinit.filezip == NULL)
return NULL;
ziinit.begin_pos = ftell(ziinit.filezip);
ziinit.in_opened_file_inzip = 0;
ziinit.ci.stream_initialised = 0;
ziinit.number_entry = 0;
init_linkedlist(&(ziinit.central_dir));
zi = (zip_internal*)ALLOC(sizeof(zip_internal));
if (zi==NULL)
{
fclose(ziinit.filezip);
return NULL;
}
*zi = ziinit;
return (zipFile)zi;
}
extern int ZEXPORT zipOpenNewFileInZip (file, filename, zipfi,
extrafield_local, size_extrafield_local,
extrafield_global, size_extrafield_global,
comment, method, level)
zipFile file;
const char* filename;
const zip_fileinfo* zipfi;
const void* extrafield_local;
uInt size_extrafield_local;
const void* extrafield_global;
uInt size_extrafield_global;
const char* comment;
int method;
int level;
{
zip_internal* zi;
uInt size_filename;
uInt size_comment;
uInt i;
int err = ZIP_OK;
if (file == NULL)
return ZIP_PARAMERROR;
if ((method!=0) && (method!=Z_DEFLATED))
return ZIP_PARAMERROR;
zi = (zip_internal*)file;
if (zi->in_opened_file_inzip == 1)
{
err = zipCloseFileInZip (file);
if (err != ZIP_OK)
return err;
}
if (filename==NULL)
filename="-";
if (comment==NULL)
size_comment = 0;
else
size_comment = strlen(comment);
size_filename = strlen(filename);
if (zipfi == NULL)
zi->ci.dosDate = 0;
else
{
if (zipfi->dosDate != 0)
zi->ci.dosDate = zipfi->dosDate;
else zi->ci.dosDate = ziplocal_TmzDateToDosDate(&zipfi->tmz_date,zipfi->dosDate);
}
zi->ci.flag = 0;
if ((level==8) || (level==9))
zi->ci.flag |= 2;
if ((level==2))
zi->ci.flag |= 4;
if ((level==1))
zi->ci.flag |= 6;
zi->ci.crc32 = 0;
zi->ci.method = method;
zi->ci.stream_initialised = 0;
zi->ci.pos_in_buffered_data = 0;
zi->ci.pos_local_header = ftell(zi->filezip);
zi->ci.size_centralheader = SIZECENTRALHEADER + size_filename +
size_extrafield_global + size_comment;
zi->ci.central_header = (char*)ALLOC(zi->ci.size_centralheader);
ziplocal_putValue_inmemory(zi->ci.central_header,CENTRALHEADERMAGIC,4);
/* version info */
ziplocal_putValue_inmemory(zi->ci.central_header+4,VERSIONMADEBY,2);
ziplocal_putValue_inmemory(zi->ci.central_header+6,20,2);
ziplocal_putValue_inmemory(zi->ci.central_header+8,zi->ci.flag,2);
ziplocal_putValue_inmemory(zi->ci.central_header+10,zi->ci.method,2);
ziplocal_putValue_inmemory(zi->ci.central_header+12,zi->ci.dosDate,4);
ziplocal_putValue_inmemory(zi->ci.central_header+16,0,4); /*crc*/
ziplocal_putValue_inmemory(zi->ci.central_header+20,0,4); /*compr size*/
ziplocal_putValue_inmemory(zi->ci.central_header+24,0,4); /*uncompr size*/
ziplocal_putValue_inmemory(zi->ci.central_header+28,size_filename,2);
ziplocal_putValue_inmemory(zi->ci.central_header+30,size_extrafield_global,2);
ziplocal_putValue_inmemory(zi->ci.central_header+32,size_comment,2);
ziplocal_putValue_inmemory(zi->ci.central_header+34,0,2); /*disk nm start*/
if (zipfi==NULL)
ziplocal_putValue_inmemory(zi->ci.central_header+36,0,2);
else
ziplocal_putValue_inmemory(zi->ci.central_header+36,zipfi->internal_fa,2);
if (zipfi==NULL)
ziplocal_putValue_inmemory(zi->ci.central_header+38,0,4);
else
ziplocal_putValue_inmemory(zi->ci.central_header+38,zipfi->external_fa,4);
ziplocal_putValue_inmemory(zi->ci.central_header+42,zi->ci.pos_local_header,4);
for (i=0;i<size_filename;i++)
*(zi->ci.central_header+SIZECENTRALHEADER+i) = *(filename+i);
for (i=0;i<size_extrafield_global;i++)
*(zi->ci.central_header+SIZECENTRALHEADER+size_filename+i) =
*(((const char*)extrafield_global)+i);
for (i=0;i<size_comment;i++)
*(zi->ci.central_header+SIZECENTRALHEADER+size_filename+
size_extrafield_global+i) = *(filename+i);
if (zi->ci.central_header == NULL)
return ZIP_INTERNALERROR;
/* write the local header */
err = ziplocal_putValue(zi->filezip,LOCALHEADERMAGIC,4);
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,20,2);/* version needed to extract */
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,zi->ci.flag,2);
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,zi->ci.method,2);
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,zi->ci.dosDate,4);
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,0,4); /* crc 32, unknown */
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,0,4); /* compressed size, unknown */
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,0,4); /* uncompressed size, unknown */
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,(uLong)size_filename,2);
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,(uLong)size_extrafield_local,2);
if ((err==ZIP_OK) && (size_filename>0))
if (fwrite(filename,(uInt)size_filename,1,zi->filezip)!=1)
err = ZIP_ERRNO;
if ((err==ZIP_OK) && (size_extrafield_local>0))
if (fwrite(extrafield_local,(uInt)size_extrafield_local,1,zi->filezip)
!=1)
err = ZIP_ERRNO;
zi->ci.stream.avail_in = (uInt)0;
zi->ci.stream.avail_out = (uInt)Z_BUFSIZE;
zi->ci.stream.next_out = zi->ci.buffered_data;
zi->ci.stream.total_in = 0;
zi->ci.stream.total_out = 0;
if ((err==ZIP_OK) && (zi->ci.method == Z_DEFLATED))
{
zi->ci.stream.zalloc = (alloc_func)0;
zi->ci.stream.zfree = (free_func)0;
zi->ci.stream.opaque = (voidpf)0;
err = deflateInit2(&zi->ci.stream, level,
Z_DEFLATED, -MAX_WBITS, /*DEF_MEM_LEVEL*/8, 0);
if (err==Z_OK)
zi->ci.stream_initialised = 1;
}
if (err==Z_OK)
zi->in_opened_file_inzip = 1;
return err;
}
extern int ZEXPORT zipWriteInFileInZip (file, buf, len)
zipFile file;
const voidp buf;
unsigned len;
{
zip_internal* zi;
int err=ZIP_OK;
if (file == NULL)
return ZIP_PARAMERROR;
zi = (zip_internal*)file;
if (zi->in_opened_file_inzip == 0)
return ZIP_PARAMERROR;
zi->ci.stream.next_in = buf;
zi->ci.stream.avail_in = len;
zi->ci.crc32 = crc32(zi->ci.crc32,buf,len);
while ((err==ZIP_OK) && (zi->ci.stream.avail_in>0))
{
if (zi->ci.stream.avail_out == 0)
{
if (fwrite(zi->ci.buffered_data,(uInt)zi->ci.pos_in_buffered_data,1,zi->filezip)
!=1)
err = ZIP_ERRNO;
zi->ci.pos_in_buffered_data = 0;
zi->ci.stream.avail_out = (uInt)Z_BUFSIZE;
zi->ci.stream.next_out = zi->ci.buffered_data;
}
if (zi->ci.method == Z_DEFLATED)
{
uLong uTotalOutBefore = zi->ci.stream.total_out;
err=deflate(&zi->ci.stream, Z_NO_FLUSH);
zi->ci.pos_in_buffered_data += zi->ci.stream.total_out - uTotalOutBefore ;
}
else
{
uInt copy_this,i;
if (zi->ci.stream.avail_in < zi->ci.stream.avail_out)
copy_this = zi->ci.stream.avail_in;
else
copy_this = zi->ci.stream.avail_out;
for (i=0;i<copy_this;i++)
*(((char*)zi->ci.stream.next_out)+i) =
*(((const char*)zi->ci.stream.next_in)+i);
{
zi->ci.stream.avail_in -= copy_this;
zi->ci.stream.avail_out-= copy_this;
zi->ci.stream.next_in+= copy_this;
zi->ci.stream.next_out+= copy_this;
zi->ci.stream.total_in+= copy_this;
zi->ci.stream.total_out+= copy_this;
zi->ci.pos_in_buffered_data += copy_this;
}
}
}
return 0;
}
extern int ZEXPORT zipCloseFileInZip (file)
zipFile file;
{
zip_internal* zi;
int err=ZIP_OK;
if (file == NULL)
return ZIP_PARAMERROR;
zi = (zip_internal*)file;
if (zi->in_opened_file_inzip == 0)
return ZIP_PARAMERROR;
zi->ci.stream.avail_in = 0;
if (zi->ci.method == Z_DEFLATED)
while (err==ZIP_OK)
{
uLong uTotalOutBefore;
if (zi->ci.stream.avail_out == 0)
{
if (fwrite(zi->ci.buffered_data,(uInt)zi->ci.pos_in_buffered_data,1,zi->filezip)
!=1)
err = ZIP_ERRNO;
zi->ci.pos_in_buffered_data = 0;
zi->ci.stream.avail_out = (uInt)Z_BUFSIZE;
zi->ci.stream.next_out = zi->ci.buffered_data;
}
uTotalOutBefore = zi->ci.stream.total_out;
err=deflate(&zi->ci.stream, Z_FINISH);
zi->ci.pos_in_buffered_data += zi->ci.stream.total_out - uTotalOutBefore ;
}
if (err==Z_STREAM_END)
err=ZIP_OK; /* this is normal */
if ((zi->ci.pos_in_buffered_data>0) && (err==ZIP_OK))
if (fwrite(zi->ci.buffered_data,(uInt)zi->ci.pos_in_buffered_data,1,zi->filezip)
!=1)
err = ZIP_ERRNO;
if ((zi->ci.method == Z_DEFLATED) && (err==ZIP_OK))
{
err=deflateEnd(&zi->ci.stream);
zi->ci.stream_initialised = 0;
}
ziplocal_putValue_inmemory(zi->ci.central_header+16,zi->ci.crc32,4); /*crc*/
ziplocal_putValue_inmemory(zi->ci.central_header+20,
zi->ci.stream.total_out,4); /*compr size*/
ziplocal_putValue_inmemory(zi->ci.central_header+24,
zi->ci.stream.total_in,4); /*uncompr size*/
if (err==ZIP_OK)
err = add_data_in_datablock(&zi->central_dir,zi->ci.central_header,
(uLong)zi->ci.size_centralheader);
free(zi->ci.central_header);
if (err==ZIP_OK)
{
long cur_pos_inzip = ftell(zi->filezip);
if (fseek(zi->filezip,
zi->ci.pos_local_header + 14,SEEK_SET)!=0)
err = ZIP_ERRNO;
if (err==ZIP_OK)
err = ziplocal_putValue(zi->filezip,zi->ci.crc32,4); /* crc 32, unknown */
if (err==ZIP_OK) /* compressed size, unknown */
err = ziplocal_putValue(zi->filezip,zi->ci.stream.total_out,4);
if (err==ZIP_OK) /* uncompressed size, unknown */
err = ziplocal_putValue(zi->filezip,zi->ci.stream.total_in,4);
if (fseek(zi->filezip,
cur_pos_inzip,SEEK_SET)!=0)
err = ZIP_ERRNO;
}
zi->number_entry ++;
zi->in_opened_file_inzip = 0;
return err;
}
extern int ZEXPORT zipClose (file, global_comment)
zipFile file;
const char* global_comment;
{
zip_internal* zi;
int err = 0;
uLong size_centraldir = 0;
uLong centraldir_pos_inzip ;
uInt size_global_comment;
if (file == NULL)
return ZIP_PARAMERROR;
zi = (zip_internal*)file;
if (zi->in_opened_file_inzip == 1)
{
err = zipCloseFileInZip (file);
}
if (global_comment==NULL)
size_global_comment = 0;
else
size_global_comment = strlen(global_comment);
centraldir_pos_inzip = ftell(zi->filezip);
if (err==ZIP_OK)
{
linkedlist_datablock_internal* ldi = zi->central_dir.first_block ;
while (ldi!=NULL)
{
if ((err==ZIP_OK) && (ldi->filled_in_this_block>0))
if (fwrite(ldi->data,(uInt)ldi->filled_in_this_block,
1,zi->filezip) !=1 )
err = ZIP_ERRNO;
size_centraldir += ldi->filled_in_this_block;
ldi = ldi->next_datablock;
}
}
free_datablock(zi->central_dir.first_block);
if (err==ZIP_OK) /* Magic End */
err = ziplocal_putValue(zi->filezip,ENDHEADERMAGIC,4);
if (err==ZIP_OK) /* number of this disk */
err = ziplocal_putValue(zi->filezip,0,2);
if (err==ZIP_OK) /* number of the disk with the start of the central directory */
err = ziplocal_putValue(zi->filezip,0,2);
if (err==ZIP_OK) /* total number of entries in the central dir on this disk */
err = ziplocal_putValue(zi->filezip,zi->number_entry,2);
if (err==ZIP_OK) /* total number of entries in the central dir */
err = ziplocal_putValue(zi->filezip,zi->number_entry,2);
if (err==ZIP_OK) /* size of the central directory */
err = ziplocal_putValue(zi->filezip,size_centraldir,4);
if (err==ZIP_OK) /* offset of start of central directory with respect to the
starting disk number */
err = ziplocal_putValue(zi->filezip,centraldir_pos_inzip ,4);
if (err==ZIP_OK) /* zipfile comment length */
err = ziplocal_putValue(zi->filezip,(uLong)size_global_comment,2);
if ((err==ZIP_OK) && (size_global_comment>0))
if (fwrite(global_comment,(uInt)size_global_comment,1,zi->filezip) !=1 )
err = ZIP_ERRNO;
fclose(zi->filezip);
TRYFREE(zi);
return err;
}
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