/* unzip.c -- IO for uncompress .zip files using zlib
- Version 0.21 with encryption, March 10th, 2003
+ Version 1.01d, September 22th, 2004
- Copyright (C) 1998-2003 Gilles Vollant
+ Copyright (C) 1998-2004 Gilles Vollant
Read unzip.h for more info
*/
/* compile with -Dlocal if your debugger can't find static symbols */
-
-#if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \
- !defined(CASESENSITIVITYDEFAULT_NO)
-#define CASESENSITIVITYDEFAULT_NO
+#ifndef CASESENSITIVITYDEFAULT_NO
+# if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)
+# define CASESENSITIVITYDEFAULT_NO
+# endif
#endif
const char unz_copyright[] =
- " unzip 0.21 Copyright 1998-2003 Gilles Vollant - http://www.winimage.com/zLibDll";
+ " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
/* unz_file_info_interntal contain internal info about a file in zipfile*/
typedef struct unz_file_info_internal_s
file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
file if we are decompressing it */
int encrypted;
- #ifndef NOUNCRPYT
+# ifndef NOUNCRYPT
unsigned long keys[3]; /* keys defining the pseudo-random sequence */
const unsigned long* pcrc_32_tab;
- #endif
+# endif
} unz_s;
-#ifndef NOUNCRPYT
+#ifndef NOUNCRYPT
#include "crypt.h"
#endif
s=(unz_s*)file;
if (!s->current_file_ok)
return UNZ_END_OF_LIST_OF_FILE;
- if (s->num_file+1==s->gi.number_entry)
+ if (s->gi.number_entry != 0xffff) /* 2^16 files overflow hack */
+ if (s->num_file+1==s->gi.number_entry)
return UNZ_END_OF_LIST_OF_FILE;
s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
unz_s* s;
int err;
-
+ /* We remember the 'current' position in the file so that we can jump
+ * back there if we fail.
+ */
+ unz_file_info cur_file_infoSaved;
+ unz_file_info_internal cur_file_info_internalSaved;
uLong num_fileSaved;
uLong pos_in_central_dirSaved;
if (!s->current_file_ok)
return UNZ_END_OF_LIST_OF_FILE;
+ /* Save the current state */
num_fileSaved = s->num_file;
pos_in_central_dirSaved = s->pos_in_central_dir;
+ cur_file_infoSaved = s->cur_file_info;
+ cur_file_info_internalSaved = s->cur_file_info_internal;
err = unzGoToFirstFile(file);
while (err == UNZ_OK)
{
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
- unzGetCurrentFileInfo(file,NULL,
- szCurrentFileName,sizeof(szCurrentFileName)-1,
- NULL,0,NULL,0);
- if (unzStringFileNameCompare(szCurrentFileName,
- szFileName,iCaseSensitivity)==0)
- return UNZ_OK;
- err = unzGoToNextFile(file);
+ err = unzGetCurrentFileInfo(file,NULL,
+ szCurrentFileName,sizeof(szCurrentFileName)-1,
+ NULL,0,NULL,0);
+ if (err == UNZ_OK)
+ {
+ if (unzStringFileNameCompare(szCurrentFileName,
+ szFileName,iCaseSensitivity)==0)
+ return UNZ_OK;
+ err = unzGoToNextFile(file);
+ }
}
+ /* We failed, so restore the state of the 'current file' to where we
+ * were.
+ */
s->num_file = num_fileSaved ;
s->pos_in_central_dir = pos_in_central_dirSaved ;
+ s->cur_file_info = cur_file_infoSaved;
+ s->cur_file_info_internal = cur_file_info_internalSaved;
return err;
}
file_in_zip_read_info_s* pfile_in_zip_read_info;
uLong offset_local_extrafield; /* offset of the local extra field */
uInt size_local_extrafield; /* size of the local extra field */
- #ifndef NOUNCRPYT
+# ifndef NOUNCRYPT
char source[12];
- #else
+# else
if (password != NULL)
return UNZ_PARAMERROR;
- #endif
+# endif
if (file==NULL)
return UNZ_PARAMERROR;
pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
pfile_in_zip_read_info->stream.zfree = (free_func)0;
pfile_in_zip_read_info->stream.opaque = (voidpf)0;
+ pfile_in_zip_read_info->stream.next_in = (voidpf)0;
+ pfile_in_zip_read_info->stream.avail_in = 0;
err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
if (err == Z_OK)
s->pfile_in_zip_read = pfile_in_zip_read_info;
- #ifndef NOUNCRPYT
+# ifndef NOUNCRYPT
if (password != NULL)
{
int i;
s->pfile_in_zip_read->pos_in_zipfile+=12;
s->encrypted=1;
}
- #endif
+# endif
return UNZ_OK;
pfile_in_zip_read_info->stream.avail_out = (uInt)len;
- if (len>pfile_in_zip_read_info->rest_read_uncompressed)
+ if ((len>pfile_in_zip_read_info->rest_read_uncompressed) &&
+ (!(pfile_in_zip_read_info->raw)))
pfile_in_zip_read_info->stream.avail_out =
- (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
+ (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
+
+ if ((len>pfile_in_zip_read_info->rest_read_compressed+
+ pfile_in_zip_read_info->stream.avail_in) &&
+ (pfile_in_zip_read_info->raw))
+ pfile_in_zip_read_info->stream.avail_out =
+ (uInt)pfile_in_zip_read_info->rest_read_compressed+
+ pfile_in_zip_read_info->stream.avail_in;
while (pfile_in_zip_read_info->stream.avail_out>0)
{
return UNZ_ERRNO;
- #ifndef NOUNCRPYT
+# ifndef NOUNCRYPT
if(s->encrypted)
{
uInt i;
zdecode(s->keys,s->pcrc_32_tab,
pfile_in_zip_read_info->read_buffer[i]);
}
- #endif
+# endif
pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
*/
err=inflate(&pfile_in_zip_read_info->stream,flush);
+ if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
+ err = Z_DATA_ERROR;
+
uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
uOutThis = uTotalOutAfter-uTotalOutBefore;
if (ZREAD(pfile_in_zip_read_info->z_filefunc,
pfile_in_zip_read_info->filestream,
- buf,size_to_read)!=size_to_read)
+ buf,read_now)!=read_now)
return UNZ_ERRNO;
return (int)read_now;
*(szComment+s->gi.size_comment)='\0';
return (int)uReadThis;
}
+
+/* Additions by RX '2004 */
+extern uLong ZEXPORT unzGetOffset (file)
+ unzFile file;
+{
+ unz_s* s;
+
+ if (file==NULL)
+ return UNZ_PARAMERROR;
+ s=(unz_s*)file;
+ if (!s->current_file_ok)
+ return 0;
+ if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff)
+ if (s->num_file==s->gi.number_entry)
+ return 0;
+ return s->pos_in_central_dir;
+}
+
+extern int ZEXPORT unzSetOffset (file, pos)
+ unzFile file;
+ uLong pos;
+{
+ unz_s* s;
+ int err;
+
+ if (file==NULL)
+ return UNZ_PARAMERROR;
+ s=(unz_s*)file;
+
+ s->pos_in_central_dir = pos;
+ s->num_file = s->gi.number_entry; /* hack */
+ err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
+ &s->cur_file_info_internal,
+ NULL,0,NULL,0,NULL,0);
+ s->current_file_ok = (err == UNZ_OK);
+ return err;
+}
projects / zlib.git / blobdiff