/* $NetBSD: ioapi.c,v 1.1.1.1 2006/01/14 20:10:57 christos Exp $ */ /* ioapi.c -- IO base function header for compress/uncompress .zip files using zlib + zip or unzip API Version 1.01e, February 12th, 2005 Copyright (C) 1998-2005 Gilles Vollant */ #include #include #include #include "zlib.h" #include "ioapi.h" /* 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 voidpf ZCALLBACK fopen_file_func OF(( voidpf opaque, const char* filename, int mode)); uLong ZCALLBACK fread_file_func OF(( voidpf opaque, voidpf stream, void* buf, uLong size)); uLong ZCALLBACK fwrite_file_func OF(( voidpf opaque, voidpf stream, const void* buf, uLong size)); long ZCALLBACK ftell_file_func OF(( voidpf opaque, voidpf stream)); long ZCALLBACK fseek_file_func OF(( voidpf opaque, voidpf stream, uLong offset, int origin)); int ZCALLBACK fclose_file_func OF(( voidpf opaque, voidpf stream)); int ZCALLBACK ferror_file_func OF(( voidpf opaque, voidpf stream)); voidpf ZCALLBACK fopen_file_func (opaque, filename, mode) voidpf opaque; const char* filename; int mode; { FILE* file = NULL; const char* mode_fopen = NULL; if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ) mode_fopen = "rb"; else if (mode & ZLIB_FILEFUNC_MODE_EXISTING) mode_fopen = "r+b"; else if (mode & ZLIB_FILEFUNC_MODE_CREATE) mode_fopen = "wb"; if ((filename!=NULL) && (mode_fopen != NULL)) file = fopen(filename, mode_fopen); return file; } uLong ZCALLBACK fread_file_func (opaque, stream, buf, size) voidpf opaque; voidpf stream; void* buf; uLong size; { uLong ret; ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream); return ret; } uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size) voidpf opaque; voidpf stream; const void* buf; uLong size; { uLong ret; ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream); return ret; } long ZCALLBACK ftell_file_func (opaque, stream) voidpf opaque; voidpf stream; { long ret; ret = ftell((FILE *)stream); return ret; } long ZCALLBACK fseek_file_func (opaque, stream, offset, origin) voidpf opaque; voidpf stream; uLong offset; int origin; { int fseek_origin=0; long ret; switch (origin) { case ZLIB_FILEFUNC_SEEK_CUR : fseek_origin = SEEK_CUR; break; case ZLIB_FILEFUNC_SEEK_END : fseek_origin = SEEK_END; break; case ZLIB_FILEFUNC_SEEK_SET : fseek_origin = SEEK_SET; break; default: return -1; } ret = 0; fseek((FILE *)stream, offset, fseek_origin); return ret; } int ZCALLBACK fclose_file_func (opaque, stream) voidpf opaque; voidpf stream; { int ret; ret = fclose((FILE *)stream); return ret; } int ZCALLBACK ferror_file_func (opaque, stream) voidpf opaque; voidpf stream; { int ret; ret = ferror((FILE *)stream); return ret; } void fill_fopen_filefunc (pzlib_filefunc_def) zlib_filefunc_def* pzlib_filefunc_def; { pzlib_filefunc_def->zopen_file = fopen_file_func; pzlib_filefunc_def->zread_file = fread_file_func; pzlib_filefunc_def->zwrite_file = fwrite_file_func; pzlib_filefunc_def->ztell_file = ftell_file_func; pzlib_filefunc_def->zseek_file = fseek_file_func; pzlib_filefunc_def->zclose_file = fclose_file_func; pzlib_filefunc_def->zerror_file = ferror_file_func; pzlib_filefunc_def->opaque = NULL; }