zlib 1.1.2v1.1.2

1 files changed, 1294 insertions, 0 deletions

diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
new file mode 100644
index 0000000..78a8473
--- /dev/null
+++ b/contrib/minizip/unzip.c
@@ -0,0 +1,1294 @@
+/* unzip.c -- IO on .zip files using zlib 
+   Version 0.15 beta, Mar 19th, 1998,
+
+   Read unzip.h for more info
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "zlib.h"
+#include "unzip.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 */
+
+
+
+#if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \
+                      !defined(CASESENSITIVITYDEFAULT_NO)
+#define CASESENSITIVITYDEFAULT_NO
+#endif
+
+
+#ifndef UNZ_BUFSIZE
+#define UNZ_BUFSIZE (16384)
+#endif
+
+#ifndef UNZ_MAXFILENAMEINZIP
+#define UNZ_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 unz_copyright[] =
+   " unzip 0.15 Copyright 1998 Gilles Vollant ";
+
+/* unz_file_info_interntal contain internal info about a file in zipfile*/
+typedef struct unz_file_info_internal_s
+{
+    uLong offset_curfile;/* relative offset of local header 4 bytes */
+} unz_file_info_internal;
+
+
+/* file_in_zip_read_info_s contain internal information about a file in zipfile,
+    when reading and decompress it */
+typedef struct
+{
+        char  *read_buffer;         /* internal buffer for compressed data */
+        z_stream stream;            /* zLib stream structure for inflate */
+
+        uLong pos_in_zipfile;       /* position in byte on the zipfile, for fseek*/
+        uLong stream_initialised;   /* flag set if stream structure is initialised*/
+
+        uLong offset_local_extrafield;/* offset of the local extra field */
+        uInt  size_local_extrafield;/* size of the local extra field */
+        uLong pos_local_extrafield;   /* position in the local extra field in read*/
+
+        uLong crc32;                /* crc32 of all data uncompressed */
+        uLong crc32_wait;           /* crc32 we must obtain after decompress all */
+        uLong rest_read_compressed; /* number of byte to be decompressed */
+        uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/
+        FILE* file;                 /* io structore of the zipfile */
+        uLong compression_method;   /* compression method (0==store) */
+        uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
+} file_in_zip_read_info_s;
+
+
+/* unz_s contain internal information about the zipfile
+*/
+typedef struct
+{
+        FILE* file;                 /* io structore of the zipfile */
+        unz_global_info gi;       /* public global information */
+        uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
+        uLong num_file;             /* number of the current file in the zipfile*/
+        uLong pos_in_central_dir;   /* pos of the current file in the central dir*/
+        uLong current_file_ok;      /* flag about the usability of the current file*/
+        uLong central_pos;          /* position of the beginning of the central dir*/
+
+        uLong size_central_dir;     /* size of the central directory  */
+        uLong offset_central_dir;   /* offset of start of central directory with
+                                                                   respect to the starting disk number */
+
+        unz_file_info cur_file_info; /* public info about the current file in zip*/
+        unz_file_info_internal cur_file_info_internal; /* private info about it*/
+    file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
+                                            file if we are decompressing it */
+} unz_s;
+
+
+/* ===========================================================================
+     Read a byte from a gz_stream; update next_in and avail_in. Return EOF
+   for end of file.
+   IN assertion: the stream s has been sucessfully opened for reading.
+*/
+
+
+local int unzlocal_getByte(fin,pi)
+        FILE *fin;
+        int *pi;
+{
+    unsigned char c;
+        int err = fread(&c, 1, 1, fin);
+    if (err==1)
+    {
+        *pi = (int)c;
+        return UNZ_OK;
+    }
+    else
+    {
+        if (ferror(fin)) 
+            return UNZ_ERRNO;
+        else
+            return UNZ_EOF;
+    }
+}
+
+
+/* ===========================================================================
+   Reads a long in LSB order from the given gz_stream. Sets 
+*/
+local int unzlocal_getShort (fin,pX)
+        FILE* fin;
+    uLong *pX;
+{
+    uLong x ;
+    int i;
+    int err;
+
+    err = unzlocal_getByte(fin,&i);
+    x = (uLong)i;
+    
+    if (err==UNZ_OK)
+        err = unzlocal_getByte(fin,&i);
+    x += ((uLong)i)<<8;
+   
+    if (err==UNZ_OK)
+        *pX = x;
+    else
+        *pX = 0;
+    return err;
+}
+
+local int unzlocal_getLong (fin,pX)
+        FILE* fin;
+    uLong *pX;
+{
+    uLong x ;
+    int i;
+    int err;
+
+    err = unzlocal_getByte(fin,&i);
+    x = (uLong)i;
+    
+    if (err==UNZ_OK)
+        err = unzlocal_getByte(fin,&i);
+    x += ((uLong)i)<<8;
+
+    if (err==UNZ_OK)
+        err = unzlocal_getByte(fin,&i);
+    x += ((uLong)i)<<16;
+
+    if (err==UNZ_OK)
+        err = unzlocal_getByte(fin,&i);
+    x += ((uLong)i)<<24;
+   
+    if (err==UNZ_OK)
+        *pX = x;
+    else
+        *pX = 0;
+    return err;
+}
+
+
+/* My own strcmpi / strcasecmp */
+local int strcmpcasenosensitive_internal (fileName1,fileName2)
+        const char* fileName1;
+        const char* fileName2;
+{
+        for (;;)
+        {
+                char c1=*(fileName1++);
+                char c2=*(fileName2++);
+                if ((c1>='a') && (c1<='z'))
+                        c1 -= 0x20;
+                if ((c2>='a') && (c2<='z'))
+                        c2 -= 0x20;
+                if (c1=='\0')
+                        return ((c2=='\0') ? 0 : -1);
+                if (c2=='\0')
+                        return 1;
+                if (c1<c2)
+                        return -1;
+                if (c1>c2)
+                        return 1;
+        }
+}
+
+
+#ifdef  CASESENSITIVITYDEFAULT_NO
+#define CASESENSITIVITYDEFAULTVALUE 2
+#else
+#define CASESENSITIVITYDEFAULTVALUE 1
+#endif
+
+#ifndef STRCMPCASENOSENTIVEFUNCTION
+#define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
+#endif
+
+/* 
+   Compare two filename (fileName1,fileName2).
+   If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
+   If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
+                                                                or strcasecmp)
+   If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
+        (like 1 on Unix, 2 on Windows)
+
+*/
+extern int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivity)
+        const char* fileName1;
+        const char* fileName2;
+        int iCaseSensitivity;
+{
+        if (iCaseSensitivity==0)
+                iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
+
+        if (iCaseSensitivity==1)
+                return strcmp(fileName1,fileName2);
+
+        return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
+} 
+
+#define BUFREADCOMMENT (0x400)
+
+/*
+  Locate the Central directory of a zipfile (at the end, just before
+    the global comment)
+*/
+local uLong unzlocal_SearchCentralDir(fin)
+        FILE *fin;
+{
+        unsigned char* buf;
+        uLong uSizeFile;
+        uLong uBackRead;
+        uLong uMaxBack=0xffff; /* maximum size of global comment */
+        uLong uPosFound=0;
+        
+        if (fseek(fin,0,SEEK_END) != 0)
+                return 0;
+
+
+        uSizeFile = ftell( fin );
+        
+        if (uMaxBack>uSizeFile)
+                uMaxBack = uSizeFile;
+
+        buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
+        if (buf==NULL)
+                return 0;
+
+        uBackRead = 4;
+        while (uBackRead<uMaxBack)
+        {
+                uLong uReadSize,uReadPos ;
+                int i;
+                if (uBackRead+BUFREADCOMMENT>uMaxBack) 
+                        uBackRead = uMaxBack;
+                else
+                        uBackRead+=BUFREADCOMMENT;
+                uReadPos = uSizeFile-uBackRead ;
+                
+                uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ? 
+                     (BUFREADCOMMENT+4) : (uSizeFile-uReadPos);
+                if (fseek(fin,uReadPos,SEEK_SET)!=0)
+                        break;
+
+                if (fread(buf,(uInt)uReadSize,1,fin)!=1)
+                        break;
+
+                for (i=0;i<(int)uReadSize-3;i++)
+                        if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && 
+                                ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
+                        {
+                                uPosFound = uReadPos+i;
+                                break;
+                        }
+
+                if (uPosFound!=0)
+                        break;
+        }
+        TRYFREE(buf);
+        return uPosFound;
+}
+
+/*
+  Open a Zip file. path contain the full pathname (by example,
+     on a Windows NT computer "c:\\test\\zlib109.zip" or on an Unix computer
+         "zlib/zlib109.zip".
+         If the zipfile cannot be opened (file don't exist or in not valid), the
+           return value is NULL.
+     Else, the return value is a unzFile Handle, usable with other function
+           of this unzip package.
+*/
+extern unzFile ZEXPORT unzOpen (path)
+        const char *path;
+{
+        unz_s us;
+        unz_s *s;
+        uLong central_pos,uL;
+        FILE * fin ;
+
+        uLong number_disk;          /* number of the current dist, used for 
+                                                                   spaning ZIP, unsupported, always 0*/
+        uLong number_disk_with_CD;  /* number the the disk with central dir, used
+                                                                   for spaning ZIP, unsupported, always 0*/
+        uLong number_entry_CD;      /* total number of entries in
+                                       the central dir 
+                                       (same than number_entry on nospan) */
+
+        int err=UNZ_OK;
+
+    if (unz_copyright[0]!=' ')
+        return NULL;
+
+    fin=fopen(path,"rb");
+        if (fin==NULL)
+                return NULL;
+
+        central_pos = unzlocal_SearchCentralDir(fin);
+        if (central_pos==0)
+                err=UNZ_ERRNO;
+
+        if (fseek(fin,central_pos,SEEK_SET)!=0)
+                err=UNZ_ERRNO;
+
+        /* the signature, already checked */
+        if (unzlocal_getLong(fin,&uL)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        /* number of this disk */
+        if (unzlocal_getShort(fin,&number_disk)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        /* number of the disk with the start of the central directory */
+        if (unzlocal_getShort(fin,&number_disk_with_CD)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        /* total number of entries in the central dir on this disk */
+        if (unzlocal_getShort(fin,&us.gi.number_entry)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        /* total number of entries in the central dir */
+        if (unzlocal_getShort(fin,&number_entry_CD)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if ((number_entry_CD!=us.gi.number_entry) ||
+                (number_disk_with_CD!=0) ||
+                (number_disk!=0))
+                err=UNZ_BADZIPFILE;
+
+        /* size of the central directory */
+        if (unzlocal_getLong(fin,&us.size_central_dir)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        /* offset of start of central directory with respect to the 
+              starting disk number */
+        if (unzlocal_getLong(fin,&us.offset_central_dir)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        /* zipfile comment length */
+        if (unzlocal_getShort(fin,&us.gi.size_comment)!=UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if ((central_pos<us.offset_central_dir+us.size_central_dir) && 
+                (err==UNZ_OK))
+                err=UNZ_BADZIPFILE;
+
+        if (err!=UNZ_OK)
+        {
+                fclose(fin);
+                return NULL;
+        }
+
+        us.file=fin;
+        us.byte_before_the_zipfile = central_pos -
+                                    (us.offset_central_dir+us.size_central_dir);
+        us.central_pos = central_pos;
+    us.pfile_in_zip_read = NULL;
+        
+
+        s=(unz_s*)ALLOC(sizeof(unz_s));
+        *s=us;
+        unzGoToFirstFile((unzFile)s);   
+        return (unzFile)s;      
+}
+
+
+/*
+  Close a ZipFile opened with unzipOpen.
+  If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),
+    these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
+  return UNZ_OK if there is no problem. */
+extern int ZEXPORT unzClose (file)
+        unzFile file;
+{
+        unz_s* s;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+
+    if (s->pfile_in_zip_read!=NULL)
+        unzCloseCurrentFile(file);
+
+        fclose(s->file);
+        TRYFREE(s);
+        return UNZ_OK;
+}
+
+
+/*
+  Write info about the ZipFile in the *pglobal_info structure.
+  No preparation of the structure is needed
+  return UNZ_OK if there is no problem. */
+extern int ZEXPORT unzGetGlobalInfo (file,pglobal_info)
+        unzFile file;
+        unz_global_info *pglobal_info;
+{
+        unz_s* s;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+        *pglobal_info=s->gi;
+        return UNZ_OK;
+}
+
+
+/*
+   Translate date/time from Dos format to tm_unz (readable more easilty)
+*/
+local void unzlocal_DosDateToTmuDate (ulDosDate, ptm)
+    uLong ulDosDate;
+    tm_unz* ptm;
+{
+    uLong uDate;
+    uDate = (uLong)(ulDosDate>>16);
+    ptm->tm_mday = (uInt)(uDate&0x1f) ;
+    ptm->tm_mon =  (uInt)((((uDate)&0x1E0)/0x20)-1) ;
+    ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
+
+    ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
+    ptm->tm_min =  (uInt) ((ulDosDate&0x7E0)/0x20) ;
+    ptm->tm_sec =  (uInt) (2*(ulDosDate&0x1f)) ;
+}
+
+/*
+  Get Info about the current file in the zipfile, with internal only info
+*/
+local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file,
+                                                  unz_file_info *pfile_info,
+                                                  unz_file_info_internal 
+                                                  *pfile_info_internal,
+                                                  char *szFileName,
+                                                                                                  uLong fileNameBufferSize,
+                                                  void *extraField,
+                                                                                                  uLong extraFieldBufferSize,
+                                                  char *szComment,
+                                                                                                  uLong commentBufferSize));
+
+local int unzlocal_GetCurrentFileInfoInternal (file,
+                                              pfile_info,
+                                              pfile_info_internal,
+                                              szFileName, fileNameBufferSize,
+                                              extraField, extraFieldBufferSize,
+                                              szComment,  commentBufferSize)
+        unzFile file;
+        unz_file_info *pfile_info;
+        unz_file_info_internal *pfile_info_internal;
+        char *szFileName;
+        uLong fileNameBufferSize;
+        void *extraField;
+        uLong extraFieldBufferSize;
+        char *szComment;
+        uLong commentBufferSize;
+{
+        unz_s* s;
+        unz_file_info file_info;
+        unz_file_info_internal file_info_internal;
+        int err=UNZ_OK;
+        uLong uMagic;
+        long lSeek=0;
+
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+        if (fseek(s->file,s->pos_in_central_dir+s->byte_before_the_zipfile,SEEK_SET)!=0)
+                err=UNZ_ERRNO;
+
+
+        /* we check the magic */
+        if (err==UNZ_OK)
+                if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK)
+                        err=UNZ_ERRNO;
+                else if (uMagic!=0x02014b50)
+                        err=UNZ_BADZIPFILE;
+
+        if (unzlocal_getShort(s->file,&file_info.version) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.version_needed) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.flag) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.compression_method) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getLong(s->file,&file_info.dosDate) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+    unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
+
+        if (unzlocal_getLong(s->file,&file_info.crc) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getLong(s->file,&file_info.compressed_size) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getLong(s->file,&file_info.uncompressed_size) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.size_filename) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.size_file_extra) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.size_file_comment) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.disk_num_start) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&file_info.internal_fa) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getLong(s->file,&file_info.external_fa) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getLong(s->file,&file_info_internal.offset_curfile) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        lSeek+=file_info.size_filename;
+        if ((err==UNZ_OK) && (szFileName!=NULL))
+        {
+                uLong uSizeRead ;
+                if (file_info.size_filename<fileNameBufferSize)
+                {
+                        *(szFileName+file_info.size_filename)='\0';
+                        uSizeRead = file_info.size_filename;
+                }
+                else
+                        uSizeRead = fileNameBufferSize;
+
+                if ((file_info.size_filename>0) && (fileNameBufferSize>0))
+                        if (fread(szFileName,(uInt)uSizeRead,1,s->file)!=1)
+                                err=UNZ_ERRNO;
+                lSeek -= uSizeRead;
+        }
+
+        
+        if ((err==UNZ_OK) && (extraField!=NULL))
+        {
+                uLong uSizeRead ;
+                if (file_info.size_file_extra<extraFieldBufferSize)
+                        uSizeRead = file_info.size_file_extra;
+                else
+                        uSizeRead = extraFieldBufferSize;
+
+                if (lSeek!=0)
+                        if (fseek(s->file,lSeek,SEEK_CUR)==0)
+                                lSeek=0;
+                        else
+                                err=UNZ_ERRNO;
+                if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
+                        if (fread(extraField,(uInt)uSizeRead,1,s->file)!=1)
+                                err=UNZ_ERRNO;
+                lSeek += file_info.size_file_extra - uSizeRead;
+        }
+        else
+                lSeek+=file_info.size_file_extra; 
+
+        
+        if ((err==UNZ_OK) && (szComment!=NULL))
+        {
+                uLong uSizeRead ;
+                if (file_info.size_file_comment<commentBufferSize)
+                {
+                        *(szComment+file_info.size_file_comment)='\0';
+                        uSizeRead = file_info.size_file_comment;
+                }
+                else
+                        uSizeRead = commentBufferSize;
+
+                if (lSeek!=0)
+                        if (fseek(s->file,lSeek,SEEK_CUR)==0)
+                                lSeek=0;
+                        else
+                                err=UNZ_ERRNO;
+                if ((file_info.size_file_comment>0) && (commentBufferSize>0))
+                        if (fread(szComment,(uInt)uSizeRead,1,s->file)!=1)
+                                err=UNZ_ERRNO;
+                lSeek+=file_info.size_file_comment - uSizeRead;
+        }
+        else
+                lSeek+=file_info.size_file_comment;
+
+        if ((err==UNZ_OK) && (pfile_info!=NULL))
+                *pfile_info=file_info;
+
+        if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
+                *pfile_info_internal=file_info_internal;
+
+        return err;
+}
+
+
+
+/*
+  Write info about the ZipFile in the *pglobal_info structure.
+  No preparation of the structure is needed
+  return UNZ_OK if there is no problem.
+*/
+extern int ZEXPORT unzGetCurrentFileInfo (file,
+                                                  pfile_info,
+                                                  szFileName, fileNameBufferSize,
+                                                  extraField, extraFieldBufferSize,
+                                                  szComment,  commentBufferSize)
+        unzFile file;
+        unz_file_info *pfile_info;
+        char *szFileName;
+        uLong fileNameBufferSize;
+        void *extraField;
+        uLong extraFieldBufferSize;
+        char *szComment;
+        uLong commentBufferSize;
+{
+        return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL,
+                                                                                                szFileName,fileNameBufferSize,
+                                                                                                extraField,extraFieldBufferSize,
+                                                                                                szComment,commentBufferSize);
+}
+
+/*
+  Set the current file of the zipfile to the first file.
+  return UNZ_OK if there is no problem
+*/
+extern int ZEXPORT unzGoToFirstFile (file)
+        unzFile file;
+{
+        int err=UNZ_OK;
+        unz_s* s;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+        s->pos_in_central_dir=s->offset_central_dir;
+        s->num_file=0;
+        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;
+}
+
+
+/*
+  Set the current file of the zipfile to the next file.
+  return UNZ_OK if there is no problem
+  return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
+*/
+extern int ZEXPORT unzGoToNextFile (file)
+        unzFile file;
+{
+        unz_s* s;       
+        int err;
+
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        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)
+                return UNZ_END_OF_LIST_OF_FILE;
+
+        s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
+                        s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
+        s->num_file++;
+        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;
+}
+
+
+/*
+  Try locate the file szFileName in the zipfile.
+  For the iCaseSensitivity signification, see unzipStringFileNameCompare
+
+  return value :
+  UNZ_OK if the file is found. It becomes the current file.
+  UNZ_END_OF_LIST_OF_FILE if the file is not found
+*/
+extern int ZEXPORT unzLocateFile (file, szFileName, iCaseSensitivity)
+        unzFile file;
+        const char *szFileName;
+        int iCaseSensitivity;
+{
+        unz_s* s;       
+        int err;
+
+        
+        uLong num_fileSaved;
+        uLong pos_in_central_dirSaved;
+
+
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+
+    if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)
+        return UNZ_PARAMERROR;
+
+        s=(unz_s*)file;
+        if (!s->current_file_ok)
+                return UNZ_END_OF_LIST_OF_FILE;
+
+        num_fileSaved = s->num_file;
+        pos_in_central_dirSaved = s->pos_in_central_dir;
+
+        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);
+        }
+
+        s->num_file = num_fileSaved ;
+        s->pos_in_central_dir = pos_in_central_dirSaved ;
+        return err;
+}
+
+
+/*
+  Read the local header of the current zipfile
+  Check the coherency of the local header and info in the end of central
+        directory about this file
+  store in *piSizeVar the size of extra info in local header
+        (filename and size of extra field data)
+*/
+local int unzlocal_CheckCurrentFileCoherencyHeader (s,piSizeVar,
+                                                                                                        poffset_local_extrafield,
+                                                                                                        psize_local_extrafield)
+        unz_s* s;
+        uInt* piSizeVar;
+        uLong *poffset_local_extrafield;
+        uInt  *psize_local_extrafield;
+{
+        uLong uMagic,uData,uFlags;
+        uLong size_filename;
+        uLong size_extra_field;
+        int err=UNZ_OK;
+
+        *piSizeVar = 0;
+        *poffset_local_extrafield = 0;
+        *psize_local_extrafield = 0;
+
+        if (fseek(s->file,s->cur_file_info_internal.offset_curfile +
+                                                                s->byte_before_the_zipfile,SEEK_SET)!=0)
+                return UNZ_ERRNO;
+
+
+        if (err==UNZ_OK)
+                if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK)
+                        err=UNZ_ERRNO;
+                else if (uMagic!=0x04034b50)
+                        err=UNZ_BADZIPFILE;
+
+        if (unzlocal_getShort(s->file,&uData) != UNZ_OK)
+                err=UNZ_ERRNO;
+/*
+        else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
+                err=UNZ_BADZIPFILE;
+*/
+        if (unzlocal_getShort(s->file,&uFlags) != UNZ_OK)
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getShort(s->file,&uData) != UNZ_OK)
+                err=UNZ_ERRNO;
+        else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))
+                err=UNZ_BADZIPFILE;
+
+    if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&
+                         (s->cur_file_info.compression_method!=Z_DEFLATED))
+        err=UNZ_BADZIPFILE;
+
+        if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* date/time */
+                err=UNZ_ERRNO;
+
+        if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* crc */
+                err=UNZ_ERRNO;
+        else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) &&
+                                      ((uFlags & 8)==0))
+                err=UNZ_BADZIPFILE;
+
+        if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* size compr */
+                err=UNZ_ERRNO;
+        else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) &&
+                                                          ((uFlags & 8)==0))
+                err=UNZ_BADZIPFILE;
+
+        if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* size uncompr */
+                err=UNZ_ERRNO;
+        else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) && 
+                                                          ((uFlags & 8)==0))
+                err=UNZ_BADZIPFILE;
+
+
+        if (unzlocal_getShort(s->file,&size_filename) != UNZ_OK)
+                err=UNZ_ERRNO;
+        else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))
+                err=UNZ_BADZIPFILE;
+
+        *piSizeVar += (uInt)size_filename;
+
+        if (unzlocal_getShort(s->file,&size_extra_field) != UNZ_OK)
+                err=UNZ_ERRNO;
+        *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +
+                                                                        SIZEZIPLOCALHEADER + size_filename;
+        *psize_local_extrafield = (uInt)size_extra_field;
+
+        *piSizeVar += (uInt)size_extra_field;
+
+        return err;
+}
+                                                                                                
+/*
+  Open for reading data the current file in the zipfile.
+  If there is no error and the file is opened, the return value is UNZ_OK.
+*/
+extern int ZEXPORT unzOpenCurrentFile (file)
+        unzFile file;
+{
+        int err=UNZ_OK;
+        int Store;
+        uInt iSizeVar;
+        unz_s* s;
+        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 */
+
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+        if (!s->current_file_ok)
+                return UNZ_PARAMERROR;
+
+    if (s->pfile_in_zip_read != NULL)
+        unzCloseCurrentFile(file);
+
+        if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar,
+                                &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)
+                return UNZ_BADZIPFILE;
+
+        pfile_in_zip_read_info = (file_in_zip_read_info_s*)
+                                                                            ALLOC(sizeof(file_in_zip_read_info_s));
+        if (pfile_in_zip_read_info==NULL)
+                return UNZ_INTERNALERROR;
+
+        pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);
+        pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
+        pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
+        pfile_in_zip_read_info->pos_local_extrafield=0;
+
+        if (pfile_in_zip_read_info->read_buffer==NULL)
+        {
+                TRYFREE(pfile_in_zip_read_info);
+                return UNZ_INTERNALERROR;
+        }
+
+        pfile_in_zip_read_info->stream_initialised=0;
+        
+        if ((s->cur_file_info.compression_method!=0) &&
+        (s->cur_file_info.compression_method!=Z_DEFLATED))
+                err=UNZ_BADZIPFILE;
+        Store = s->cur_file_info.compression_method==0;
+
+        pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
+        pfile_in_zip_read_info->crc32=0;
+        pfile_in_zip_read_info->compression_method =
+            s->cur_file_info.compression_method;
+        pfile_in_zip_read_info->file=s->file;
+        pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
+
+    pfile_in_zip_read_info->stream.total_out = 0;
+
+        if (!Store)
+        {
+          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; 
+      
+          err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
+          if (err == Z_OK)
+            pfile_in_zip_read_info->stream_initialised=1;
+        /* windowBits is passed < 0 to tell that there is no zlib header.
+         * Note that in this case inflate *requires* an extra "dummy" byte
+         * after the compressed stream in order to complete decompression and
+         * return Z_STREAM_END. 
+         * In unzip, i don't wait absolutely Z_STREAM_END because I known the 
+         * size of both compressed and uncompressed data
+         */
+        }
+        pfile_in_zip_read_info->rest_read_compressed = 
+            s->cur_file_info.compressed_size ;
+        pfile_in_zip_read_info->rest_read_uncompressed = 
+            s->cur_file_info.uncompressed_size ;
+
+        
+        pfile_in_zip_read_info->pos_in_zipfile = 
+            s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + 
+                          iSizeVar;
+        
+        pfile_in_zip_read_info->stream.avail_in = (uInt)0;
+
+
+        s->pfile_in_zip_read = pfile_in_zip_read_info;
+    return UNZ_OK;
+}
+
+
+/*
+  Read bytes from the current file.
+  buf contain buffer where data must be copied
+  len the size of buf.
+
+  return the number of byte copied if somes bytes are copied
+  return 0 if the end of file was reached
+  return <0 with error code if there is an error
+    (UNZ_ERRNO for IO error, or zLib error for uncompress error)
+*/
+extern int ZEXPORT unzReadCurrentFile  (file, buf, len)
+        unzFile file;
+        voidp buf;
+        unsigned len;
+{
+        int err=UNZ_OK;
+        uInt iRead = 0;
+        unz_s* s;
+        file_in_zip_read_info_s* pfile_in_zip_read_info;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+    pfile_in_zip_read_info=s->pfile_in_zip_read;
+
+        if (pfile_in_zip_read_info==NULL)
+                return UNZ_PARAMERROR;
+
+
+        if ((pfile_in_zip_read_info->read_buffer == NULL))
+                return UNZ_END_OF_LIST_OF_FILE;
+        if (len==0)
+                return 0;
+
+        pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
+
+        pfile_in_zip_read_info->stream.avail_out = (uInt)len;
+        
+        if (len>pfile_in_zip_read_info->rest_read_uncompressed)
+                pfile_in_zip_read_info->stream.avail_out = 
+                  (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
+
+        while (pfile_in_zip_read_info->stream.avail_out>0)
+        {
+                if ((pfile_in_zip_read_info->stream.avail_in==0) &&
+            (pfile_in_zip_read_info->rest_read_compressed>0))
+                {
+                        uInt uReadThis = UNZ_BUFSIZE;
+                        if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
+                                uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
+                        if (uReadThis == 0)
+                                return UNZ_EOF;
+                        if (fseek(pfile_in_zip_read_info->file,
+                      pfile_in_zip_read_info->pos_in_zipfile + 
+                         pfile_in_zip_read_info->byte_before_the_zipfile,SEEK_SET)!=0)
+                                return UNZ_ERRNO;
+                        if (fread(pfile_in_zip_read_info->read_buffer,uReadThis,1,
+                         pfile_in_zip_read_info->file)!=1)
+                                return UNZ_ERRNO;
+                        pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
+
+                        pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
+                        
+                        pfile_in_zip_read_info->stream.next_in = 
+                (Bytef*)pfile_in_zip_read_info->read_buffer;
+                        pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
+                }
+
+                if (pfile_in_zip_read_info->compression_method==0)
+                {
+                        uInt uDoCopy,i ;
+                        if (pfile_in_zip_read_info->stream.avail_out < 
+                            pfile_in_zip_read_info->stream.avail_in)
+                                uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
+                        else
+                                uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
+                                
+                        for (i=0;i<uDoCopy;i++)
+                                *(pfile_in_zip_read_info->stream.next_out+i) =
+                        *(pfile_in_zip_read_info->stream.next_in+i);
+                                        
+                        pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,
+                                                                pfile_in_zip_read_info->stream.next_out,
+                                                                uDoCopy);
+                        pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
+                        pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
+                        pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
+                        pfile_in_zip_read_info->stream.next_out += uDoCopy;
+                        pfile_in_zip_read_info->stream.next_in += uDoCopy;
+            pfile_in_zip_read_info->stream.total_out += uDoCopy;
+                        iRead += uDoCopy;
+                }
+                else
+                {
+                        uLong uTotalOutBefore,uTotalOutAfter;
+                        const Bytef *bufBefore;
+                        uLong uOutThis;
+                        int flush=Z_SYNC_FLUSH;
+
+                        uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
+                        bufBefore = pfile_in_zip_read_info->stream.next_out;
+
+                        /*
+                        if ((pfile_in_zip_read_info->rest_read_uncompressed ==
+                                 pfile_in_zip_read_info->stream.avail_out) &&
+                                (pfile_in_zip_read_info->rest_read_compressed == 0))
+                                flush = Z_FINISH;
+                        */
+                        err=inflate(&pfile_in_zip_read_info->stream,flush);
+
+                        uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
+                        uOutThis = uTotalOutAfter-uTotalOutBefore;
+                        
+                        pfile_in_zip_read_info->crc32 = 
+                crc32(pfile_in_zip_read_info->crc32,bufBefore,
+                        (uInt)(uOutThis));
+
+                        pfile_in_zip_read_info->rest_read_uncompressed -=
+                uOutThis;
+
+                        iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
+            
+                        if (err==Z_STREAM_END)
+                                return (iRead==0) ? UNZ_EOF : iRead;
+                        if (err!=Z_OK) 
+                                break;
+                }
+        }
+
+        if (err==Z_OK)
+                return iRead;
+        return err;
+}
+
+
+/*
+  Give the current position in uncompressed data
+*/
+extern z_off_t ZEXPORT unztell (file)
+        unzFile file;
+{
+        unz_s* s;
+        file_in_zip_read_info_s* pfile_in_zip_read_info;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+    pfile_in_zip_read_info=s->pfile_in_zip_read;
+
+        if (pfile_in_zip_read_info==NULL)
+                return UNZ_PARAMERROR;
+
+        return (z_off_t)pfile_in_zip_read_info->stream.total_out;
+}
+
+
+/*
+  return 1 if the end of file was reached, 0 elsewhere 
+*/
+extern int ZEXPORT unzeof (file)
+        unzFile file;
+{
+        unz_s* s;
+        file_in_zip_read_info_s* pfile_in_zip_read_info;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+    pfile_in_zip_read_info=s->pfile_in_zip_read;
+
+        if (pfile_in_zip_read_info==NULL)
+                return UNZ_PARAMERROR;
+        
+        if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
+                return 1;
+        else
+                return 0;
+}
+
+
+
+/*
+  Read extra field from the current file (opened by unzOpenCurrentFile)
+  This is the local-header version of the extra field (sometimes, there is
+    more info in the local-header version than in the central-header)
+
+  if buf==NULL, it return the size of the local extra field that can be read
+
+  if buf!=NULL, len is the size of the buffer, the extra header is copied in
+        buf.
+  the return value is the number of bytes copied in buf, or (if <0) 
+        the error code
+*/
+extern int ZEXPORT unzGetLocalExtrafield (file,buf,len)
+        unzFile file;
+        voidp buf;
+        unsigned len;
+{
+        unz_s* s;
+        file_in_zip_read_info_s* pfile_in_zip_read_info;
+        uInt read_now;
+        uLong size_to_read;
+
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+    pfile_in_zip_read_info=s->pfile_in_zip_read;
+
+        if (pfile_in_zip_read_info==NULL)
+                return UNZ_PARAMERROR;
+
+        size_to_read = (pfile_in_zip_read_info->size_local_extrafield - 
+                                pfile_in_zip_read_info->pos_local_extrafield);
+
+        if (buf==NULL)
+                return (int)size_to_read;
+        
+        if (len>size_to_read)
+                read_now = (uInt)size_to_read;
+        else
+                read_now = (uInt)len ;
+
+        if (read_now==0)
+                return 0;
+        
+        if (fseek(pfile_in_zip_read_info->file,
+              pfile_in_zip_read_info->offset_local_extrafield + 
+                          pfile_in_zip_read_info->pos_local_extrafield,SEEK_SET)!=0)
+                return UNZ_ERRNO;
+
+        if (fread(buf,(uInt)size_to_read,1,pfile_in_zip_read_info->file)!=1)
+                return UNZ_ERRNO;
+
+        return (int)read_now;
+}
+
+/*
+  Close the file in zip opened with unzipOpenCurrentFile
+  Return UNZ_CRCERROR if all the file was read but the CRC is not good
+*/
+extern int ZEXPORT unzCloseCurrentFile (file)
+        unzFile file;
+{
+        int err=UNZ_OK;
+
+        unz_s* s;
+        file_in_zip_read_info_s* pfile_in_zip_read_info;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+    pfile_in_zip_read_info=s->pfile_in_zip_read;
+
+        if (pfile_in_zip_read_info==NULL)
+                return UNZ_PARAMERROR;
+
+
+        if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
+        {
+                if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)
+                        err=UNZ_CRCERROR;
+        }
+
+
+        TRYFREE(pfile_in_zip_read_info->read_buffer);
+        pfile_in_zip_read_info->read_buffer = NULL;
+        if (pfile_in_zip_read_info->stream_initialised)
+                inflateEnd(&pfile_in_zip_read_info->stream);
+
+        pfile_in_zip_read_info->stream_initialised = 0;
+        TRYFREE(pfile_in_zip_read_info);
+
+    s->pfile_in_zip_read=NULL;
+
+        return err;
+}
+
+
+/*
+  Get the global comment string of the ZipFile, in the szComment buffer.
+  uSizeBuf is the size of the szComment buffer.
+  return the number of byte copied or an error code <0
+*/
+extern int ZEXPORT unzGetGlobalComment (file, szComment, uSizeBuf)
+        unzFile file;
+        char *szComment;
+        uLong uSizeBuf;
+{
+        int err=UNZ_OK;
+        unz_s* s;
+        uLong uReadThis ;
+        if (file==NULL)
+                return UNZ_PARAMERROR;
+        s=(unz_s*)file;
+
+        uReadThis = uSizeBuf;
+        if (uReadThis>s->gi.size_comment)
+                uReadThis = s->gi.size_comment;
+
+        if (fseek(s->file,s->central_pos+22,SEEK_SET)!=0)
+                return UNZ_ERRNO;
+
+        if (uReadThis>0)
+    {
+      *szComment='\0';
+          if (fread(szComment,(uInt)uReadThis,1,s->file)!=1)
+                return UNZ_ERRNO;
+    }
+
+        if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
+                *(szComment+s->gi.size_comment)='\0';
+        return (int)uReadThis;
+}