sl@0: /* Portions Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0: 
sl@0: /* gzio.c -- IO on .gz files
sl@0:  * Copyright (C) 1995-2005 Jean-loup Gailly.
sl@0:  * For conditions of distribution and use, see copyright notice in zlib.h
sl@0:  *
sl@0:  * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
sl@0:  */
sl@0: 
sl@0: /* @(#) $Id$ */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include "libzgzio.h"	/* libzgzio.h must be included BEFORE zutil.h, as its header guard is used in zutil.h */
sl@0: #include "zutil.h"
sl@0: 
sl@0: #ifdef NO_DEFLATE       /* for compatibility with old definition */
sl@0: #  define NO_GZCOMPRESS
sl@0: #endif
sl@0: 
sl@0: #ifndef NO_DUMMY_DECL
sl@0: struct internal_state {int dummy;}; /* for buggy compilers */
sl@0: #endif
sl@0: 
sl@0: #ifndef Z_BUFSIZE
sl@0: #  ifdef MAXSEG_64K
sl@0: #    define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */
sl@0: #  else
sl@0: #    define Z_BUFSIZE 16384
sl@0: #  endif
sl@0: #endif
sl@0: #ifndef Z_PRINTF_BUFSIZE
sl@0: #  define Z_PRINTF_BUFSIZE 4096
sl@0: #endif
sl@0: 
sl@0: #ifdef __MVS__
sl@0: #  pragma map (fdopen , "\174\174FDOPEN")
sl@0:    FILE *fdopen(int, const char *);
sl@0: #endif
sl@0: 
sl@0: #ifndef STDC
sl@0: extern voidp  malloc OF((uInt size));
sl@0: extern void   free   OF((voidpf ptr));
sl@0: #endif
sl@0: 
sl@0: #define ALLOC(size) malloc(size)
sl@0: #define TRYFREE(p) {if (p) free(p);}
sl@0: 
sl@0: static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
sl@0: 
sl@0: /* gzip flag byte */
sl@0: #define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
sl@0: #define HEAD_CRC     0x02 /* bit 1 set: header CRC present */
sl@0: #define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
sl@0: #define ORIG_NAME    0x08 /* bit 3 set: original file name present */
sl@0: #define COMMENT      0x10 /* bit 4 set: file comment present */
sl@0: #define RESERVED     0xE0 /* bits 5..7: reserved */
sl@0: 
sl@0: typedef struct gz_stream {
sl@0:     z_stream stream;
sl@0:     int      z_err;   /* error code for last stream operation */
sl@0:     int      z_eof;   /* set if end of input file */
sl@0:     FILE     *file;   /* .gz file */
sl@0:     Byte     *inbuf;  /* input buffer */
sl@0:     Byte     *outbuf; /* output buffer */
sl@0:     uLong    crc;     /* crc32 of uncompressed data */
sl@0:     char     *msg;    /* error message */
sl@0:     char     *path;   /* path name for debugging only */
sl@0:     int      transparent; /* 1 if input file is not a .gz file */
sl@0:     char     mode;    /* 'w' or 'r' */
sl@0:     z_off_t  start;   /* start of compressed data in file (header skipped) */
sl@0:     z_off_t  in;      /* bytes into deflate or inflate */
sl@0:     z_off_t  out;     /* bytes out of deflate or inflate */
sl@0:     int      back;    /* one character push-back */
sl@0:     int      last;    /* true if push-back is last character */
sl@0: } gz_stream;
sl@0: 
sl@0: #ifdef SYMBIAN_EZLIB_DEVICE
sl@0: /* This array is a copy of the one originally defined in zutil.cpp.  It is
sl@0:    required here as zutil.cpp is now compiled seperately in libzcore.dll */
sl@0: const char * const z_errmsg[10] = {
sl@0: 		"need dictionary",     /* Z_NEED_DICT       2  */
sl@0: 		"stream end",          /* Z_STREAM_END      1  */
sl@0: 		"",                    /* Z_OK              0  */
sl@0: 		"file error",          /* Z_ERRNO         (-1) */
sl@0: 		"stream error",        /* Z_STREAM_ERROR  (-2) */
sl@0: 		"data error",          /* Z_DATA_ERROR    (-3) */
sl@0: 		"insufficient memory", /* Z_MEM_ERROR     (-4) */
sl@0: 		"buffer error",        /* Z_BUF_ERROR     (-5) */
sl@0: 		"incompatible version",/* Z_VERSION_ERROR (-6) */
sl@0: ""};
sl@0: #endif /* SYMBIAN_EZLIB_DEVICE */
sl@0: 
sl@0: local gzFile gz_open      OF((const char *path, const char *mode, int  fd));
sl@0: local int do_flush        OF((gzFile file, int flush));
sl@0: local int    get_byte     OF((gz_stream *s));
sl@0: local void   check_header OF((gz_stream *s));
sl@0: local int    destroy      OF((gz_stream *s));
sl@0: local void   putLong      OF((FILE *file, uLong x));
sl@0: local uLong  getLong      OF((gz_stream *s));
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Opens a gzip (.gz) file for reading or writing. The mode parameter
sl@0:    is as in fopen ("rb" or "wb"). The file is given either by file descriptor
sl@0:    or path name (if fd == -1).
sl@0:    gz_open returns NULL if the file could not be opened or if there was
sl@0:    insufficient memory to allocate the (de)compression state; errno
sl@0:    can be checked to distinguish the two cases (if errno is zero, the
sl@0:    zlib error is Z_MEM_ERROR).
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: local gzFile gz_open (const char * path,const char *  mode, int fd)
sl@0: #else
sl@0: local gzFile gz_open (path, mode, fd)
sl@0:     const char *path;
sl@0:     const char *mode;
sl@0:     int  fd;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: 
sl@0: {
sl@0:     int err;
sl@0:     int level = Z_DEFAULT_COMPRESSION; /* compression level */
sl@0:     int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */
sl@0:     char *p = (char*)mode;
sl@0:     gz_stream *s;
sl@0:     char fmode[80]; /* copy of mode, without the compression level */
sl@0:     char *m = fmode;
sl@0: 
sl@0:     if (!path || !mode) return Z_NULL;
sl@0: 
sl@0:     s = (gz_stream *)ALLOC(sizeof(gz_stream));
sl@0:     if (!s) return Z_NULL;
sl@0: 
sl@0:     s->stream.zalloc = (alloc_func)0;
sl@0:     s->stream.zfree = (free_func)0;
sl@0:     s->stream.opaque = (voidpf)0;
sl@0:     s->stream.next_in = s->inbuf = Z_NULL;
sl@0:     s->stream.next_out = s->outbuf = Z_NULL;
sl@0:     s->stream.avail_in = s->stream.avail_out = 0;
sl@0:     s->file = NULL;
sl@0:     s->z_err = Z_OK;
sl@0:     s->z_eof = 0;
sl@0:     s->in = 0;
sl@0:     s->out = 0;
sl@0:     s->back = EOF;
sl@0:     s->crc = crc32_r(0L, Z_NULL, 0);
sl@0:     s->msg = NULL;
sl@0:     s->transparent = 0;
sl@0: 
sl@0:     s->path = (char*)ALLOC(strlen(path)+1);
sl@0:     if (s->path == NULL) {
sl@0:         return destroy(s), (gzFile)Z_NULL;
sl@0:     }
sl@0:     strcpy(s->path, path); /* do this early for debugging */
sl@0: 
sl@0:     s->mode = '\0';
sl@0:     do {
sl@0:         if (*p == 'r') s->mode = 'r';
sl@0:         if (*p == 'w' || *p == 'a') s->mode = 'w';
sl@0:         if (*p >= '0' && *p <= '9') {
sl@0:             level = *p - '0';
sl@0:         } else if (*p == 'f') {
sl@0:           strategy = Z_FILTERED;
sl@0:         } else if (*p == 'h') {
sl@0:           strategy = Z_HUFFMAN_ONLY;
sl@0:         } else if (*p == 'R') {
sl@0:           strategy = Z_RLE;
sl@0:         } else {
sl@0:             *m++ = *p; /* copy the mode */
sl@0:         }
sl@0:     } while (*p++ && m != fmode + sizeof(fmode));
sl@0:     if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
sl@0: 
sl@0:     if (s->mode == 'w') {
sl@0: #ifdef NO_GZCOMPRESS
sl@0:         err = Z_STREAM_ERROR;
sl@0: #else
sl@0:         err = deflateInit2_r(&(s->stream), level,
sl@0:                            Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy);
sl@0:         /* windowBits is passed < 0 to suppress zlib header */
sl@0: 
sl@0:         s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
sl@0: #endif
sl@0:         if (err != Z_OK || s->outbuf == Z_NULL) {
sl@0:             return destroy(s), (gzFile)Z_NULL;
sl@0:         }
sl@0:     } else {
sl@0:         s->stream.next_in  = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE);
sl@0: 
sl@0:         err = inflateInit2_r(&(s->stream), -MAX_WBITS);
sl@0:         /* windowBits is passed < 0 to tell that there is no zlib header.
sl@0:          * Note that in this case inflate *requires* an extra "dummy" byte
sl@0:          * after the compressed stream in order to complete decompression and
sl@0:          * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are
sl@0:          * present after the compressed stream.
sl@0:          */
sl@0:         if (err != Z_OK || s->inbuf == Z_NULL) {
sl@0:             return destroy(s), (gzFile)Z_NULL;
sl@0:         }
sl@0:     }
sl@0:     s->stream.avail_out = Z_BUFSIZE;
sl@0: 	//coverity[cleanup_stack]
sl@0: 	//This code is derived from open source and hence does not use cleanup stack 
sl@0:     errno = 0;
sl@0:     s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode);
sl@0: 
sl@0:     if (s->file == NULL) {
sl@0:         return destroy(s), (gzFile)Z_NULL;
sl@0:     }
sl@0:     if (s->mode == 'w') {
sl@0:         /* Write a very simple .gz header:
sl@0:          */
sl@0:         fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
sl@0:              Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
sl@0:         s->start = 10L;
sl@0:         /* We use 10L instead of ftell(s->file) to because ftell causes an
sl@0:          * fflush on some systems. This version of the library doesn't use
sl@0:          * start anyway in write mode, so this initialization is not
sl@0:          * necessary.
sl@0:          */
sl@0:     } else {
sl@0: 		//coverity[cleanup_stack]
sl@0: 		//This code is derived from open source and hence does not use cleanup stack
sl@0:         check_header(s); /* skip the .gz header */
sl@0:         s->start = ftell(s->file) - s->stream.avail_in;
sl@0:     }
sl@0: 
sl@0:     return (gzFile)s;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:      Opens a gzip (.gz) file for reading or writing.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: gzFile gzopen_r (const char * path, const char * mode)
sl@0: #else
sl@0: gzFile ZEXPORT gzopen (path, mode)
sl@0:     const char *path;
sl@0:     const char *mode;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: 
sl@0: {
sl@0:     return gz_open (path, mode, -1);
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Associate a gzFile with the file descriptor fd. fd is not dup'ed here
sl@0:    to mimic the behavio(u)r of fdopen.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: gzFile gzdopen_r (int fd, const char *  mode)
sl@0: #else
sl@0: gzFile ZEXPORT gzdopen (fd, mode)
sl@0:     int fd;
sl@0:     const char *mode;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     char name[46];      /* allow for up to 128-bit integers */
sl@0: 
sl@0:     if (fd < 0) return (gzFile)Z_NULL;
sl@0:     sprintf(name, "<fd:%d>", fd); /* for debugging */
sl@0: 
sl@0:     return gz_open (name, mode, fd);
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:  * Update the compression level and strategy
sl@0:  */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzsetparams_r (gzFile file,int  level,int  strategy)	
sl@0: #else
sl@0: int ZEXPORT gzsetparams (file, level, strategy)
sl@0:     gzFile file;
sl@0:     int level;
sl@0:     int strategy;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: 
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
sl@0: 
sl@0:     /* Make room to allow flushing */
sl@0:     if (s->stream.avail_out == 0) {
sl@0: 
sl@0:         s->stream.next_out = s->outbuf;
sl@0:         if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
sl@0:             s->z_err = Z_ERRNO;
sl@0:         }
sl@0:         s->stream.avail_out = Z_BUFSIZE;
sl@0:     }
sl@0: 
sl@0:     return deflateParams_r (&(s->stream), level, strategy);
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Read a byte from a gz_stream; update next_in and avail_in. Return EOF
sl@0:    for end of file.
sl@0:    IN assertion: the stream s has been sucessfully opened for reading.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: local int get_byte (gz_stream *s)
sl@0: #else
sl@0: local int get_byte(s)
sl@0:     gz_stream *s;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     if (s->z_eof) return EOF;
sl@0:     if (s->stream.avail_in == 0) {
sl@0:         errno = 0;
sl@0:         s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
sl@0:         if (s->stream.avail_in == 0) {
sl@0:             s->z_eof = 1;
sl@0:             if (ferror(s->file)) s->z_err = Z_ERRNO;
sl@0:             return EOF;
sl@0:         }
sl@0:         s->stream.next_in = s->inbuf;
sl@0:     }
sl@0:     s->stream.avail_in--;
sl@0:     return *(s->stream.next_in)++;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:     Check the gzip header of a gz_stream opened for reading. Set the stream
sl@0:     mode to transparent if the gzip magic header is not present; set s->err
sl@0:     to Z_DATA_ERROR if the magic header is present but the rest of the header
sl@0:     is incorrect.
sl@0:     IN assertion: the stream s has already been created sucessfully;
sl@0:     s->stream.avail_in is zero for the first time, but may be non-zero
sl@0:     for concatenated .gz files.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: local void check_header (gz_stream * s)
sl@0: #else
sl@0: local void check_header(s)
sl@0:     gz_stream *s;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     int method; /* method byte */
sl@0:     int flags;  /* flags byte */
sl@0:     uInt len;
sl@0:     int c;
sl@0: 
sl@0:     /* Assure two bytes in the buffer so we can peek ahead -- handle case
sl@0:        where first byte of header is at the end of the buffer after the last
sl@0:        gzip segment */
sl@0:     len = s->stream.avail_in;
sl@0:     if (len < 2) {
sl@0:         if (len) s->inbuf[0] = s->stream.next_in[0];
sl@0:         errno = 0;
sl@0:         len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
sl@0:         if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
sl@0:         s->stream.avail_in += len;
sl@0:         s->stream.next_in = s->inbuf;
sl@0:         if (s->stream.avail_in < 2) {
sl@0:             s->transparent = s->stream.avail_in;
sl@0:             return;
sl@0:         }
sl@0:     }
sl@0: 
sl@0:     /* Peek ahead to check the gzip magic header */
sl@0:     if (s->stream.next_in[0] != gz_magic[0] ||
sl@0:         s->stream.next_in[1] != gz_magic[1]) {
sl@0:         s->transparent = 1;
sl@0:         return;
sl@0:     }
sl@0:     s->stream.avail_in -= 2;
sl@0:     s->stream.next_in += 2;
sl@0: 
sl@0:     /* Check the rest of the gzip header */
sl@0:     method = get_byte(s);
sl@0:     flags = get_byte(s);
sl@0:     if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
sl@0:         s->z_err = Z_DATA_ERROR;
sl@0:         return;
sl@0:     }
sl@0: 
sl@0:     /* Discard time, xflags and OS code: */
sl@0:     for (len = 0; len < 6; len++) (void)get_byte(s);
sl@0: 
sl@0:     if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
sl@0:         len  =  (uInt)get_byte(s);
sl@0:         len += ((uInt)get_byte(s))<<8;
sl@0:         /* len is garbage if EOF but the loop below will quit anyway */
sl@0:         while (len-- != 0 && get_byte(s) != EOF) ;
sl@0:     }
sl@0:     if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
sl@0:         while ((c = get_byte(s)) != 0 && c != EOF) ;
sl@0:     }
sl@0:     if ((flags & COMMENT) != 0) {   /* skip the .gz file comment */
sl@0:         while ((c = get_byte(s)) != 0 && c != EOF) ;
sl@0:     }
sl@0:     if ((flags & HEAD_CRC) != 0) {  /* skip the header crc */
sl@0:         for (len = 0; len < 2; len++) (void)get_byte(s);
sl@0:     }
sl@0:     s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
sl@0: }
sl@0: 
sl@0:  /* ===========================================================================
sl@0:     Cleanup then free the given gz_stream. Return a zlib error code.
sl@0:     Try freeing in the reverse order of allocations.
sl@0:  */
sl@0: #ifdef __SYMBIAN32__ 
sl@0: local int destroy (gz_stream * s)
sl@0: #else
sl@0: local int destroy (s)
sl@0:     gz_stream *s;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     int err = Z_OK;
sl@0: 
sl@0:     if (!s) return Z_STREAM_ERROR;
sl@0: 
sl@0:     TRYFREE(s->msg);
sl@0: 
sl@0:     if (s->stream.state != NULL) {
sl@0:         if (s->mode == 'w') {
sl@0: #ifdef NO_GZCOMPRESS
sl@0:             err = Z_STREAM_ERROR;
sl@0: #else
sl@0:             err = deflateEnd_r(&(s->stream));
sl@0: #endif
sl@0:         } else if (s->mode == 'r') {
sl@0:             err = inflateEnd_r(&(s->stream));
sl@0:         }
sl@0:     }
sl@0:     if (s->file != NULL && fclose(s->file)) {
sl@0: #ifdef ESPIPE
sl@0:         if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
sl@0: #endif
sl@0:             err = Z_ERRNO;
sl@0:     }
sl@0:     if (s->z_err < 0) err = s->z_err;
sl@0: 
sl@0:     TRYFREE(s->inbuf);
sl@0:     TRYFREE(s->outbuf);
sl@0:     TRYFREE(s->path);
sl@0:     TRYFREE(s);
sl@0:     return err;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Reads the given number of uncompressed bytes from the compressed file.
sl@0:    gzread returns the number of bytes actually read (0 for end of file).
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzread_r (gzFile file,voidp  buf,unsigned  len)
sl@0: #else
sl@0: int ZEXPORT gzread (file, buf, len)
sl@0:     gzFile file;
sl@0:     voidp buf;
sl@0:     unsigned len;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0:     Bytef *start = (Bytef*)buf; /* starting point for crc computation */
sl@0:     Byte  *next_out; /* == stream.next_out but not forced far (for MSDOS) */
sl@0: 
sl@0:     if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
sl@0: 
sl@0:     if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
sl@0:     if (s->z_err == Z_STREAM_END) return 0;  /* EOF */
sl@0: 
sl@0:     next_out = (Byte*)buf;
sl@0:     s->stream.next_out = (Bytef*)buf;
sl@0:     s->stream.avail_out = len;
sl@0: 
sl@0:     if (s->stream.avail_out && s->back != EOF) {
sl@0:         *next_out++ = s->back;
sl@0:         s->stream.next_out++;
sl@0:         s->stream.avail_out--;
sl@0:         s->back = EOF;
sl@0:         s->out++;
sl@0:         start++;
sl@0:         if (s->last) {
sl@0:             s->z_err = Z_STREAM_END;
sl@0:             return 1;
sl@0:         }
sl@0:     }
sl@0: 
sl@0:     while (s->stream.avail_out != 0) {
sl@0: 
sl@0:         if (s->transparent) {
sl@0:             /* Copy first the lookahead bytes: */
sl@0:             uInt n = s->stream.avail_in;
sl@0:             if (n > s->stream.avail_out) n = s->stream.avail_out;
sl@0:             if (n > 0) {
sl@0:                 zmemcpy(s->stream.next_out, s->stream.next_in, n);
sl@0:                 next_out += n;
sl@0:                 s->stream.next_out = next_out;
sl@0:                 s->stream.next_in   += n;
sl@0:                 s->stream.avail_out -= n;
sl@0:                 s->stream.avail_in  -= n;
sl@0:             }
sl@0:             if (s->stream.avail_out > 0) {
sl@0:                 s->stream.avail_out -=
sl@0:                     (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
sl@0:             }
sl@0:             len -= s->stream.avail_out;
sl@0:             s->in  += len;
sl@0:             s->out += len;
sl@0:             if (len == 0) s->z_eof = 1;
sl@0:             return (int)len;
sl@0:         }
sl@0:         if (s->stream.avail_in == 0 && !s->z_eof) {
sl@0: 
sl@0:             errno = 0;
sl@0:             s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
sl@0:             if (s->stream.avail_in == 0) {
sl@0:                 s->z_eof = 1;
sl@0:                 if (ferror(s->file)) {
sl@0:                     s->z_err = Z_ERRNO;
sl@0:                     break;
sl@0:                 }
sl@0:             }
sl@0:             s->stream.next_in = s->inbuf;
sl@0:         }
sl@0:         s->in += s->stream.avail_in;
sl@0:         s->out += s->stream.avail_out;
sl@0:         s->z_err = inflate_r(&(s->stream), Z_NO_FLUSH);
sl@0:         s->in -= s->stream.avail_in;
sl@0:         s->out -= s->stream.avail_out;
sl@0: 
sl@0:         if (s->z_err == Z_STREAM_END) {
sl@0:             /* Check CRC and original size */
sl@0:             s->crc = crc32_r(s->crc, start, (uInt)(s->stream.next_out - start));
sl@0:             start = s->stream.next_out;
sl@0: 
sl@0:             if (getLong(s) != s->crc) {
sl@0:                 s->z_err = Z_DATA_ERROR;
sl@0:             } else {
sl@0:                 (void)getLong(s);
sl@0:                 /* The uncompressed length returned by above getlong() may be
sl@0:                  * different from s->out in case of concatenated .gz files.
sl@0:                  * Check for such files:
sl@0:                  */
sl@0:                 check_header(s);
sl@0:                 if (s->z_err == Z_OK) {
sl@0:                     inflateReset_r(&(s->stream));
sl@0:                     s->crc = crc32_r(0L, Z_NULL, 0);
sl@0:                 }
sl@0:             }
sl@0:         }
sl@0:         if (s->z_err != Z_OK || s->z_eof) break;
sl@0:     }
sl@0:     s->crc = crc32_r(s->crc, start, (uInt)(s->stream.next_out - start));
sl@0: 
sl@0:     if (len == s->stream.avail_out &&
sl@0:         (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
sl@0:         return -1;
sl@0:     return (int)(len - s->stream.avail_out);
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Reads one byte from the compressed file. gzgetc returns this byte
sl@0:    or -1 in case of end of file or error.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzgetc_r (gzFile file)
sl@0: #else
sl@0: int ZEXPORT gzgetc(file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: 
sl@0: {
sl@0:     unsigned char c;
sl@0: 
sl@0:     return gzread_r(file, &c, 1) == 1 ? c : -1;
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Push one byte back onto the stream.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzungetc_r (int c,gzFile file)
sl@0: #else
sl@0: int ZEXPORT gzungetc(c, file)
sl@0:     int c;
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF;
sl@0:     s->back = c;
sl@0:     s->out--;
sl@0:     s->last = (s->z_err == Z_STREAM_END);
sl@0:     if (s->last) s->z_err = Z_OK;
sl@0:     s->z_eof = 0;
sl@0:     return c;
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Reads bytes from the compressed file until len-1 characters are
sl@0:    read, or a newline character is read and transferred to buf, or an
sl@0:    end-of-file condition is encountered.  The string is then terminated
sl@0:    with a null character.
sl@0:    gzgets returns buf, or Z_NULL in case of error.
sl@0: 
sl@0:    The current implementation is not optimized at all.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: char * gzgets_r (gzFile file, char * buf, int len)
sl@0: #else
sl@0: char * ZEXPORT gzgets(file, buf, len)
sl@0:     gzFile file;
sl@0:     char *buf;
sl@0:     int len;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     char *b = buf;
sl@0:     if (buf == Z_NULL || len <= 0) return Z_NULL;
sl@0: 
sl@0:     while (--len > 0 && gzread_r(file, buf, 1) == 1 && *buf++ != '\n') ;
sl@0:     *buf = '\0';
sl@0:     return b == buf && len > 0 ? Z_NULL : b;
sl@0: }
sl@0: 
sl@0: 
sl@0: #ifndef NO_GZCOMPRESS
sl@0: /* ===========================================================================
sl@0:    Writes the given number of uncompressed bytes into the compressed file.
sl@0:    gzwrite returns the number of bytes actually written (0 in case of error).
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzwrite_r (gzFile file,voidpc  buf,unsigned len)	
sl@0: #else
sl@0: int ZEXPORT gzwrite (file, buf, len)
sl@0:     gzFile file;
sl@0:     voidpc buf;
sl@0:     unsigned len;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
sl@0: 
sl@0:     s->stream.next_in = (Bytef*)buf;
sl@0:     s->stream.avail_in = len;
sl@0: 
sl@0:     while (s->stream.avail_in != 0) {
sl@0: 
sl@0:         if (s->stream.avail_out == 0) {
sl@0: 
sl@0:             s->stream.next_out = s->outbuf;
sl@0:             if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
sl@0:                 s->z_err = Z_ERRNO;
sl@0:                 break;
sl@0:             }
sl@0:             s->stream.avail_out = Z_BUFSIZE;
sl@0:         }
sl@0:         s->in += s->stream.avail_in;
sl@0:         s->out += s->stream.avail_out;
sl@0:         s->z_err = deflate_r(&(s->stream), Z_NO_FLUSH);
sl@0:         s->in -= s->stream.avail_in;
sl@0:         s->out -= s->stream.avail_out;
sl@0:         if (s->z_err != Z_OK) break;
sl@0:     }
sl@0:     s->crc = crc32_r(s->crc, (const Bytef *)buf, len);
sl@0: 
sl@0:     return (int)(len - s->stream.avail_in);
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Converts, formats, and writes the args to the compressed file under
sl@0:    control of the format string, as in fprintf. gzprintf returns the number of
sl@0:    uncompressed bytes actually written (0 in case of error).
sl@0: */
sl@0: #ifdef STDC
sl@0: #include <stdarg.h>
sl@0: 
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzprintf_r (gzFile file, const char *format, va_list va)
sl@0: #else
sl@0: int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     int len;
sl@0: 	int ret;
sl@0:     
sl@0: #ifndef SYMBIAN_EZLIB_DEVICE
sl@0: 	char buf[Z_PRINTF_BUFSIZE];
sl@0:     buf[sizeof(buf) - 1] = 0;
sl@0: #else
sl@0: 	char *buf = (char*)0;
sl@0:     buf = (char*) ALLOC(Z_PRINTF_BUFSIZE * sizeof(char));
sl@0:     if(!buf)
sl@0:     	return 0;
sl@0:     buf[Z_PRINTF_BUFSIZE - 1] = 0;
sl@0: #endif /* SYMBIAN_EZLIB_DEVICE */
sl@0:     
sl@0: #ifdef NO_vsnprintf
sl@0: #  ifdef HAS_vsprintf_void
sl@0:     (void)vsprintf(buf, format, va);
sl@0:     va_end(va);
sl@0: #    ifndef SYMBIAN_EZLIB_DEVICE
sl@0:        for (len = 0; len < sizeof(buf); len++)
sl@0: #	 else
sl@0: 	   for (len = 0; len < Z_PRINTF_BUFSIZE; len++)
sl@0: #	 endif /* SYMBIAN_EZLIB_DEVICE */
sl@0:         if (buf[len] == 0) break;
sl@0: #  else
sl@0:     len = vsprintf(buf, format, va);
sl@0:     va_end(va);
sl@0: #  endif
sl@0: #else
sl@0: #  ifdef HAS_vsnprintf_void
sl@0: #    ifndef SYMBIAN_EZLIB_DEVICE
sl@0:        (void)vsnprintf(buf, sizeof(buf), format, va);
sl@0: #    else 
sl@0: 	   (void)vsnprintf(buf, Z_PRINTF_BUFSIZE, format, va);
sl@0: #    endif /* SYMBIAN_EZLIB_DEVICE */
sl@0:     va_end(va);
sl@0:     len = strlen(buf);
sl@0: #  else
sl@0: #    ifndef SYMBIAN_EZLIB_DEVICE 
sl@0:        len = vsnprintf(buf, sizeof(buf), format, va);
sl@0: #    else
sl@0: 	   len = vsnprintf(buf, Z_PRINTF_BUFSIZE, format, va);
sl@0: #    endif /* SYMBIAN_EZLIB_DEVICE */
sl@0:     va_end(va);
sl@0: #  endif
sl@0: #endif
sl@0: 
sl@0: #ifndef SYMBIAN_EZLIB_DEVICE
sl@0:     if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0)
sl@0:     {
sl@0: #else
sl@0: 	if (len <= 0 || len >= Z_PRINTF_BUFSIZE || buf[Z_PRINTF_BUFSIZE - 1] != 0)
sl@0: 	{
sl@0: 		free(buf);
sl@0: #endif /* SYMBIAN_EZLIB_DEVICE */
sl@0:     	return 0;
sl@0:     }
sl@0:     ret = gzwrite_r(file, buf, (unsigned)len);
sl@0:     
sl@0: #ifdef SYMBIAN_EZLIB_DEVICE
sl@0:     free(buf);    
sl@0: #endif /* SYMBIAN_EZLIB_DEVICE */
sl@0:     return ret; 
sl@0: }
sl@0: 
sl@0: #else /* not ANSI C */
sl@0: 
sl@0: int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
sl@0:                        a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
sl@0:     gzFile file;
sl@0:     const char *format;
sl@0:     int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
sl@0:         a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
sl@0: {
sl@0:     char buf[Z_PRINTF_BUFSIZE];
sl@0:     int len;
sl@0: 
sl@0:     buf[sizeof(buf) - 1] = 0;
sl@0: #ifdef NO_snprintf
sl@0: #  ifdef HAS_sprintf_void
sl@0:     sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
sl@0:             a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
sl@0:     for (len = 0; len < sizeof(buf); len++)
sl@0:         if (buf[len] == 0) break;
sl@0: #  else
sl@0:     len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
sl@0:                 a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
sl@0: #  endif
sl@0: #else
sl@0: #  ifdef HAS_snprintf_void
sl@0:     snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
sl@0:              a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
sl@0:     len = strlen(buf);
sl@0: #  else
sl@0:     len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
sl@0:                  a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
sl@0: #  endif
sl@0: #endif
sl@0:     if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0)
sl@0:         return 0;
sl@0:     return gzwrite(file, buf, len);
sl@0: }
sl@0: #endif
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Writes c, converted to an unsigned char, into the compressed file.
sl@0:    gzputc returns the value that was written, or -1 in case of error.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int  gzputc_r (gzFile file,int  c)
sl@0: #else
sl@0: int ZEXPORT gzputc(file, c)
sl@0:     gzFile file;
sl@0:     int c;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     unsigned char cc = (unsigned char) c; /* required for big endian systems */
sl@0: 
sl@0:     return gzwrite_r(file, &cc, 1) == 1 ? (int)cc : -1;
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Writes the given null-terminated string to the compressed file, excluding
sl@0:    the terminating null character.
sl@0:    gzputs returns the number of characters written, or -1 in case of error.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int  gzputs_r (gzFile file,  const char * s)
sl@0: #else
sl@0: int ZEXPORT gzputs(file, s)
sl@0:     gzFile file;
sl@0:     const char *s;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     return gzwrite_r(file, (char*)s, (unsigned)strlen(s));
sl@0: }
sl@0: 
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Flushes all pending output into the compressed file. The parameter
sl@0:    flush is as in the deflate() function.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: local int do_flush (gzFile file,int  flush)
sl@0: #else
sl@0: local int do_flush (file, flush)
sl@0:     gzFile file;
sl@0:     int flush;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     uInt len;
sl@0:     int done = 0;
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
sl@0: 
sl@0:     s->stream.avail_in = 0; /* should be zero already anyway */
sl@0: 
sl@0:     for (;;) {
sl@0:         len = Z_BUFSIZE - s->stream.avail_out;
sl@0: 
sl@0:         if (len != 0) {
sl@0:             if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) {
sl@0:                 s->z_err = Z_ERRNO;
sl@0:                 return Z_ERRNO;
sl@0:             }
sl@0:             s->stream.next_out = s->outbuf;
sl@0:             s->stream.avail_out = Z_BUFSIZE;
sl@0:         }
sl@0:         if (done) break;
sl@0:         s->out += s->stream.avail_out;
sl@0:         s->z_err = deflate_r(&(s->stream), flush);
sl@0:         s->out -= s->stream.avail_out;
sl@0: 
sl@0:         /* Ignore the second of two consecutive flushes: */
sl@0:         if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
sl@0: 
sl@0:         /* deflate has finished flushing only when it hasn't used up
sl@0:          * all the available space in the output buffer:
sl@0:          */
sl@0:         done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
sl@0: 
sl@0:         if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
sl@0:     }
sl@0:     return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
sl@0: }
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzflush_r (gzFile file,int  flush)
sl@0: #else
sl@0: int ZEXPORT gzflush (file, flush)
sl@0:      gzFile file;
sl@0:      int flush;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0:     int err = do_flush (file, flush);
sl@0: 
sl@0:     if (err) return err;
sl@0:     fflush(s->file);
sl@0:     return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
sl@0: }
sl@0: #endif /* NO_GZCOMPRESS */
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Sets the starting position for the next gzread or gzwrite on the given
sl@0:    compressed file. The offset represents a number of bytes in the
sl@0:    gzseek returns the resulting offset location as measured in bytes from
sl@0:    the beginning of the uncompressed stream, or -1 in case of error.
sl@0:    SEEK_END is not implemented, returns error.
sl@0:    In this version of the library, gzseek can be extremely slow.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: z_off_t gzseek_r (gzFile file,z_off_t  offset,int whence)
sl@0: #else
sl@0: z_off_t ZEXPORT gzseek (file, offset, whence)
sl@0:     gzFile file;
sl@0:     z_off_t offset;
sl@0:     int whence;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: 
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || whence == SEEK_END ||
sl@0:         s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
sl@0:         return -1L;
sl@0:     }
sl@0: 
sl@0:     if (s->mode == 'w') {
sl@0: #ifdef NO_GZCOMPRESS
sl@0:         return -1L;
sl@0: #else
sl@0:         if (whence == SEEK_SET) {
sl@0:             offset -= s->in;
sl@0:         }
sl@0:         if (offset < 0) return -1L;
sl@0: 
sl@0:         /* At this point, offset is the number of zero bytes to write. */
sl@0:         if (s->inbuf == Z_NULL) {
sl@0:             s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
sl@0:             if (s->inbuf == Z_NULL) return -1L;
sl@0:             zmemzero(s->inbuf, Z_BUFSIZE);
sl@0:         }
sl@0:         while (offset > 0)  {
sl@0:             uInt size = Z_BUFSIZE;
sl@0:             if (offset < Z_BUFSIZE) size = (uInt)offset;
sl@0: 
sl@0:             size = gzwrite_r(file, s->inbuf, size);
sl@0:             if (size == 0) return -1L;
sl@0: 
sl@0:             offset -= size;
sl@0:         }
sl@0:         return s->in;
sl@0: #endif
sl@0:     }
sl@0:     /* Rest of function is for reading only */
sl@0: 
sl@0:     /* compute absolute position */
sl@0:     if (whence == SEEK_CUR) {
sl@0:         offset += s->out;
sl@0:     }
sl@0:     if (offset < 0) return -1L;
sl@0: 
sl@0:     if (s->transparent) {
sl@0:         /* map to fseek */
sl@0:         s->back = EOF;
sl@0:         s->stream.avail_in = 0;
sl@0:         s->stream.next_in = s->inbuf;
sl@0:         if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
sl@0: 
sl@0:         s->in = s->out = offset;
sl@0:         return offset;
sl@0:     }
sl@0: 
sl@0:     /* For a negative seek, rewind and use positive seek */
sl@0:     if (offset >= s->out) {
sl@0:         offset -= s->out;
sl@0:     } else if (gzrewind_r(file) < 0) {
sl@0:         return -1L;
sl@0:     }
sl@0:     /* offset is now the number of bytes to skip. */
sl@0: 
sl@0:     if (offset != 0 && s->outbuf == Z_NULL) {
sl@0:         s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
sl@0:         if (s->outbuf == Z_NULL) return -1L;
sl@0:     }
sl@0:     if (offset && s->back != EOF) {
sl@0:         s->back = EOF;
sl@0:         s->out++;
sl@0:         offset--;
sl@0:         if (s->last) s->z_err = Z_STREAM_END;
sl@0:     }
sl@0:     while (offset > 0)  {
sl@0:         int size = Z_BUFSIZE;
sl@0:         if (offset < Z_BUFSIZE) size = (int)offset;
sl@0: 
sl@0:         size = gzread_r(file, s->outbuf, (uInt)size);
sl@0:         if (size <= 0) return -1L;
sl@0:         offset -= size;
sl@0:     }
sl@0:     return s->out;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:      Rewinds input file.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int  gzrewind_r (gzFile file)
sl@0: #else
sl@0: int ZEXPORT gzrewind (file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || s->mode != 'r') return -1;
sl@0: 
sl@0:     s->z_err = Z_OK;
sl@0:     s->z_eof = 0;
sl@0:     s->back = EOF;
sl@0:     s->stream.avail_in = 0;
sl@0:     s->stream.next_in = s->inbuf;
sl@0:     s->crc = crc32_r(0L, Z_NULL, 0);
sl@0:     if (!s->transparent) (void)inflateReset_r(&s->stream);
sl@0:     s->in = 0;
sl@0:     s->out = 0;
sl@0:     return fseek(s->file, s->start, SEEK_SET);
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Returns the starting position for the next gzread or gzwrite on the
sl@0:    given compressed file. This position represents a number of bytes in the
sl@0:    uncompressed data stream.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: z_off_t gztell_r (gzFile file)
sl@0: #else
sl@0: z_off_t ZEXPORT gztell (file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     return gzseek_r(file, 0L, SEEK_CUR);
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Returns 1 when EOF has previously been detected reading the given
sl@0:    input stream, otherwise zero.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzeof_r (gzFile file)
sl@0: #else
sl@0: int ZEXPORT gzeof (file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     /* With concatenated compressed files that can have embedded
sl@0:      * crc trailers, z_eof is no longer the only/best indicator of EOF
sl@0:      * on a gz_stream. Handle end-of-stream error explicitly here.
sl@0:      */
sl@0:     if (s == NULL || s->mode != 'r') return 0;
sl@0:     if (s->z_eof) return 1;
sl@0:     return s->z_err == Z_STREAM_END;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Returns 1 if reading and doing so transparently, otherwise zero.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzdirect_r (gzFile file)
sl@0: #else
sl@0: int ZEXPORT gzdirect (file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL || s->mode != 'r') return 0;
sl@0:     return s->transparent;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Outputs a long in LSB order to the given file
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: local void putLong (FILE * file,uLong  x)
sl@0: #else
sl@0: local void putLong (file, x)
sl@0:     FILE *file;
sl@0:     uLong x;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     int n;
sl@0:     for (n = 0; n < 4; n++) {
sl@0:         fputc((int)(x & 0xff), file);
sl@0:         x >>= 8;
sl@0:     }
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Reads a long in LSB order from the given gz_stream. Sets z_err in case
sl@0:    of error.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: local uLong getLong (gz_stream * s)
sl@0: #else
sl@0: local uLong getLong (s)
sl@0:     gz_stream *s;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     uLong x = (uLong)get_byte(s);
sl@0:     int c;
sl@0: 
sl@0:     x += ((uLong)get_byte(s))<<8;
sl@0:     x += ((uLong)get_byte(s))<<16;
sl@0:     c = get_byte(s);
sl@0:     if (c == EOF) s->z_err = Z_DATA_ERROR;
sl@0:     x += ((uLong)c)<<24;
sl@0:     return x;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Flushes all pending output if necessary, closes the compressed file
sl@0:    and deallocates all the (de)compression state.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: int gzclose_r(gzFile file)
sl@0: #else
sl@0: int ZEXPORT gzclose (file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL) return Z_STREAM_ERROR;
sl@0: 
sl@0:     if (s->mode == 'w') {
sl@0: #ifdef NO_GZCOMPRESS
sl@0:         return Z_STREAM_ERROR;
sl@0: #else
sl@0:         if (do_flush (file, Z_FINISH) != Z_OK)
sl@0:             return destroy((gz_stream*)file);
sl@0: 
sl@0:         putLong (s->file, s->crc);
sl@0:         putLong (s->file, (uLong)(s->in & 0xffffffff));
sl@0: #endif
sl@0:     }
sl@0:     return destroy((gz_stream*)file);
sl@0: }
sl@0: 
sl@0: #ifdef STDC
sl@0: #  define zstrerror(errnum) strerror(errnum)
sl@0: #else
sl@0: #  define zstrerror(errnum) ""
sl@0: #endif
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Returns the error message for the last error which occurred on the
sl@0:    given compressed file. errnum is set to zlib error number. If an
sl@0:    error occurred in the file system and not in the compression library,
sl@0:    errnum is set to Z_ERRNO and the application may consult errno
sl@0:    to get the exact error code.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: const char *  gzerror_r (gzFile file, int *  errnum)
sl@0: #else
sl@0: const char * ZEXPORT gzerror (file, errnum)
sl@0:     gzFile file;
sl@0:     int *errnum;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     char *m;
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL) {
sl@0:         *errnum = Z_STREAM_ERROR;
sl@0:         return (const char*)ERR_MSG(Z_STREAM_ERROR);
sl@0:     }
sl@0:     *errnum = s->z_err;
sl@0:     if (*errnum == Z_OK) return (const char*)"";
sl@0: 
sl@0:     m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
sl@0: 
sl@0:     if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
sl@0: 
sl@0:     TRYFREE(s->msg);
sl@0:     s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
sl@0:     if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
sl@0:     strcpy(s->msg, s->path);
sl@0:     strcat(s->msg, ": ");
sl@0:     strcat(s->msg, m);
sl@0:     return (const char*)s->msg;
sl@0: }
sl@0: 
sl@0: /* ===========================================================================
sl@0:    Clear the error and end-of-file flags, and do the same for the real file.
sl@0: */
sl@0: #ifdef __SYMBIAN32__
sl@0: void gzclearerr_r (gzFile file)
sl@0: #else
sl@0: void ZEXPORT gzclearerr (file)
sl@0:     gzFile file;
sl@0: #endif /* __SYMBIAN32__ */
sl@0: {
sl@0:     gz_stream *s = (gz_stream*)file;
sl@0: 
sl@0:     if (s == NULL) return;
sl@0:     if (s->z_err != Z_STREAM_END) s->z_err = Z_OK;
sl@0:     s->z_eof = 0;
sl@0:     clearerr(s->file);
sl@0: }
sl@0: 
sl@0: 
sl@0: