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zlib 0.92

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This commit is contained in:
Mark Adler
2011-09-09 23:08:07 -07:00
parent 1c71d8b13b
commit bdde4e09d2
25 changed files with 884 additions and 910 deletions
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272
gzio.c
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@@ -3,7 +3,7 @@
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* $Id: gzio.c,v 1.7 1995/05/02 12:22:08 jloup Exp $ */
/* $Id: gzio.c,v 1.8 1995/05/03 17:27:09 jloup Exp $ */
#include <stdio.h>
@@ -68,13 +68,13 @@ local int destroy (s)
if (s->stream.state != NULL) {
if (s->mode == 'w') {
err = deflateEnd(&(s->stream));
err = deflateEnd(&(s->stream));
} else if (s->mode == 'r') {
err = inflateEnd(&(s->stream));
err = inflateEnd(&(s->stream));
}
}
if (s->file != NULL && fclose(s->file)) {
err = Z_ERRNO;
err = Z_ERRNO;
}
if (s->z_err < 0) err = s->z_err;
zcfree((voidp)0, s);
@@ -115,34 +115,34 @@ local gzFile gz_open (path, mode, fd)
s->path = (char*)ALLOC(strlen(path)+1);
if (s->path == NULL) {
return destroy(s), (gzFile)Z_NULL;
return destroy(s), (gzFile)Z_NULL;
}
strcpy(s->path, path); /* do this early for debugging */
s->mode = '\0';
do {
if (*p == 'r') s->mode = 'r';
if (*p == 'w') s->mode = 'w';
if (*p == 'r') s->mode = 'r';
if (*p == 'w') s->mode = 'w';
} while (*p++);
if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
if (s->mode == 'w') {
err = deflateInit2(&(s->stream), Z_DEFAULT_COMPRESSION,
DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, 0);
/* windowBits is passed < 0 to suppress zlib header */
err = deflateInit2(&(s->stream), Z_DEFAULT_COMPRESSION,
DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, 0);
/* windowBits is passed < 0 to suppress zlib header */
s->stream.next_out = s->outbuf = ALLOC(Z_BUFSIZE);
s->stream.next_out = s->outbuf = ALLOC(Z_BUFSIZE);
if (err != Z_OK || s->outbuf == Z_NULL) {
return destroy(s), (gzFile)Z_NULL;
}
if (err != Z_OK || s->outbuf == Z_NULL) {
return destroy(s), (gzFile)Z_NULL;
}
} else {
err = inflateInit2(&(s->stream), -MAX_WBITS);
s->stream.next_in = s->inbuf = ALLOC(Z_BUFSIZE);
err = inflateInit2(&(s->stream), -MAX_WBITS);
s->stream.next_in = s->inbuf = ALLOC(Z_BUFSIZE);
if (err != Z_OK || s->inbuf == Z_NULL) {
return destroy(s), (gzFile)Z_NULL;
}
if (err != Z_OK || s->inbuf == Z_NULL) {
return destroy(s), (gzFile)Z_NULL;
}
}
s->stream.avail_out = Z_BUFSIZE;
@@ -150,55 +150,55 @@ local gzFile gz_open (path, mode, fd)
s->file = fd < 0 ? FOPEN(path, mode) : fdopen(fd, mode);
if (s->file == NULL) {
return destroy(s), (gzFile)Z_NULL;
return destroy(s), (gzFile)Z_NULL;
}
if (s->mode == 'w') {
/* Write a very simple .gz header:
*/
fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", GZ_MAGIC_1, GZ_MAGIC_2,
DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
} else {
/* Check and skip the header:
/* Write a very simple .gz header:
*/
Byte c1 = 0, c2 = 0;
Byte method = 0;
Byte flags = 0;
Byte xflags = 0;
Byte time[4];
Byte osCode;
int c;
fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", GZ_MAGIC_1, GZ_MAGIC_2,
DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
} else {
/* Check and skip the header:
*/
Byte c1 = 0, c2 = 0;
Byte method = 0;
Byte flags = 0;
Byte xflags = 0;
Byte time[4];
Byte osCode;
int c;
s->stream.avail_in = fread(s->inbuf, 1, 2, s->file);
if (s->stream.avail_in != 2 || s->inbuf[0] != GZ_MAGIC_1
|| s->inbuf[1] != GZ_MAGIC_2) {
s->transparent = 1;
return (gzFile)s;
}
s->stream.avail_in = 0;
fscanf(s->file,"%c%c%4c%c%c", &method, &flags, time, &xflags, &osCode);
s->stream.avail_in = fread(s->inbuf, 1, 2, s->file);
if (s->stream.avail_in != 2 || s->inbuf[0] != GZ_MAGIC_1
|| s->inbuf[1] != GZ_MAGIC_2) {
s->transparent = 1;
return (gzFile)s;
}
s->stream.avail_in = 0;
fscanf(s->file,"%c%c%4c%c%c", &method, &flags, time, &xflags, &osCode);
if (method != DEFLATED || feof(s->file) || (flags & RESERVED) != 0) {
s->z_err = Z_DATA_ERROR;
return (gzFile)s;
}
if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
long len;
fscanf(s->file, "%c%c", &c1, &c2);
len = c1 + ((long)c2<<8);
fseek(s->file, len, SEEK_CUR);
}
if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
while ((c = getc(s->file)) != 0 && c != EOF) ;
}
if ((flags & COMMENT) != 0) { /* skip the .gz file comment */
while ((c = getc(s->file)) != 0 && c != EOF) ;
}
if ((flags & HEAD_CRC) != 0) { /* skip the header crc */
fscanf(s->file, "%c%c", &c1, &c2);
}
if (feof(s->file)) {
s->z_err = Z_DATA_ERROR;
}
if (method != DEFLATED || feof(s->file) || (flags & RESERVED) != 0) {
s->z_err = Z_DATA_ERROR;
return (gzFile)s;
}
if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
long len;
fscanf(s->file, "%c%c", &c1, &c2);
len = c1 + ((long)c2<<8);
fseek(s->file, len, SEEK_CUR);
}
if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
while ((c = getc(s->file)) != 0 && c != EOF) ;
}
if ((flags & COMMENT) != 0) { /* skip the .gz file comment */
while ((c = getc(s->file)) != 0 && c != EOF) ;
}
if ((flags & HEAD_CRC) != 0) { /* skip the header crc */
fscanf(s->file, "%c%c", &c1, &c2);
}
if (feof(s->file)) {
s->z_err = Z_DATA_ERROR;
}
}
return (gzFile)s;
}
@@ -240,16 +240,16 @@ int gzread (file, buf, len)
if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
if (s->transparent) {
unsigned n = 0;
Byte *b = (Byte*)buf;
/* Copy the first two (non-magic) bytes if not done already */
while (s->stream.avail_in > 0 && len > 0) {
*b++ = *s->stream.next_in++;
s->stream.avail_in--;
len--; n++;
}
if (len == 0) return n;
return n + fread(b, 1, len, s->file);
unsigned n = 0;
Byte *b = (Byte*)buf;
/* Copy the first two (non-magic) bytes if not done already */
while (s->stream.avail_in > 0 && len > 0) {
*b++ = *s->stream.next_in++;
s->stream.avail_in--;
len--; n++;
}
if (len == 0) return n;
return n + fread(b, 1, len, s->file);
}
if (s->z_err == Z_DATA_ERROR) return -1; /* bad .gz file */
if (s->z_err == Z_STREAM_END) return 0; /* don't read crc as data */
@@ -259,24 +259,24 @@ int gzread (file, buf, len)
while (s->stream.avail_out != 0) {
if (s->stream.avail_in == 0 && !s->z_eof) {
if (s->stream.avail_in == 0 && !s->z_eof) {
errno = 0;
s->stream.avail_in =
fread(s->inbuf, 1, Z_BUFSIZE, s->file);
if (s->stream.avail_in == 0) {
s->z_eof = 1;
} else if (s->stream.avail_in == (uInt)EOF) {
s->stream.avail_in = 0;
s->z_eof = 1;
s->z_err = Z_ERRNO;
break;
}
s->stream.next_in = s->inbuf;
}
s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
errno = 0;
s->stream.avail_in =
fread(s->inbuf, 1, Z_BUFSIZE, s->file);
if (s->stream.avail_in == 0) {
s->z_eof = 1;
} else if (s->stream.avail_in == (uInt)EOF) {
s->stream.avail_in = 0;
s->z_eof = 1;
s->z_err = Z_ERRNO;
break;
}
s->stream.next_in = s->inbuf;
}
s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
if (s->z_err == Z_STREAM_END ||
if (s->z_err == Z_STREAM_END ||
s->z_err != Z_OK || s->z_eof) break;
}
len -= s->stream.avail_out;
@@ -302,18 +302,18 @@ int gzwrite (file, buf, len)
while (s->stream.avail_in != 0) {
if (s->stream.avail_out == 0) {
if (s->stream.avail_out == 0) {
s->stream.next_out = s->outbuf;
if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
s->z_err = Z_ERRNO;
break;
}
s->stream.avail_out = Z_BUFSIZE;
}
s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
s->stream.next_out = s->outbuf;
if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
s->z_err = Z_ERRNO;
break;
}
s->stream.avail_out = Z_BUFSIZE;
}
s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
if (s->z_err != Z_OK) break;
if (s->z_err != Z_OK) break;
}
s->crc = crc32(s->crc, buf, len);
@@ -339,25 +339,25 @@ int gzflush (file, flush)
s->stream.avail_in = 0; /* should be zero already anyway */
for (;;) {
len = Z_BUFSIZE - s->stream.avail_out;
len = Z_BUFSIZE - s->stream.avail_out;
if (len != 0) {
if (fwrite(s->outbuf, 1, len, s->file) != len) {
s->z_err = Z_ERRNO;
return Z_ERRNO;
}
s->stream.next_out = s->outbuf;
s->stream.avail_out = Z_BUFSIZE;
}
if (done) break;
s->z_err = deflate(&(s->stream), flush);
if (len != 0) {
if (fwrite(s->outbuf, 1, len, s->file) != len) {
s->z_err = Z_ERRNO;
return Z_ERRNO;
}
s->stream.next_out = s->outbuf;
s->stream.avail_out = Z_BUFSIZE;
}
if (done) break;
s->z_err = deflate(&(s->stream), flush);
/* deflate has finished flushing only when it hasn't used up
* all the available space in the output buffer:
*/
done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
}
return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
}
@@ -371,8 +371,8 @@ local void putLong (file, x)
{
int n;
for (n = 0; n < 4; n++) {
fputc((int)(x & 0xff), file);
x >>= 8;
fputc((int)(x & 0xff), file);
x >>= 8;
}
}
@@ -386,8 +386,8 @@ local uLong getLong (buf)
Byte *p = buf+4;
do {
x <<= 8;
x |= *--p;
x <<= 8;
x |= *--p;
} while (p != buf);
return x;
}
@@ -406,31 +406,31 @@ int gzclose (file)
if (s == NULL) return Z_STREAM_ERROR;
if (s->mode == 'w') {
err = gzflush (file, Z_FINISH);
if (err != Z_OK) return destroy(file);
err = gzflush (file, Z_FINISH);
if (err != Z_OK) return destroy(file);
putLong (s->file, s->crc);
putLong (s->file, s->stream.total_in);
putLong (s->file, s->crc);
putLong (s->file, s->stream.total_in);
} else if (s->mode == 'r' && s->z_err == Z_STREAM_END) {
/* slide CRC and original size if they are at the end of inbuf */
if ((n = s->stream.avail_in) < 8 && !s->z_eof) {
Byte *p = s->inbuf;
Byte *q = s->stream.next_in;
while (n--) { *p++ = *q++; };
/* slide CRC and original size if they are at the end of inbuf */
if ((n = s->stream.avail_in) < 8 && !s->z_eof) {
Byte *p = s->inbuf;
Byte *q = s->stream.next_in;
while (n--) { *p++ = *q++; };
n = s->stream.avail_in;
n += fread(p, 1, 8, s->file);
s->stream.next_in = s->inbuf;
}
/* check CRC and original size */
if (n < 8 ||
getLong(s->stream.next_in) != s->crc ||
getLong(s->stream.next_in + 4) != s->stream.total_out) {
n = s->stream.avail_in;
n += fread(p, 1, 8, s->file);
s->stream.next_in = s->inbuf;
}
/* check CRC and original size */
if (n < 8 ||
getLong(s->stream.next_in) != s->crc ||
getLong(s->stream.next_in + 4) != s->stream.total_out) {
s->z_err = Z_DATA_ERROR;
}
s->z_err = Z_DATA_ERROR;
}
}
return destroy(file);
}
@@ -450,8 +450,8 @@ char* gzerror (file, errnum)
gz_stream *s = (gz_stream*)file;
if (s == NULL) {
*errnum = Z_STREAM_ERROR;
return z_errmsg[1-Z_STREAM_ERROR];
*errnum = Z_STREAM_ERROR;
return z_errmsg[1-Z_STREAM_ERROR];
}
*errnum = s->z_err;
if (*errnum == Z_OK) return "";