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gzwrite.c updated to zlib 1.2.11

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This commit is contained in:
Przemyslaw Skibinski 2017-01-18 12:47:32 +01:00
parent 5735fd74ee
commit 3805a00904
1 changed files with 214 additions and 126 deletions
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340
zlibWrapper/gzwrite.c
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@ -1,9 +1,9 @@
/* gzwrite.c contains minimal changes required to be compiled with zlibWrapper:
* - gz_statep was converted to union to work with -Wstrict-aliasing=1 */
/* gzwrite.c -- zlib functions for writing gzip files
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
* For conditions of distribution and use, see http://www.zlib.net/zlib_license.html
* - gz_statep was converted to union to work with -Wstrict-aliasing=1 */
/* gzwrite.c -- zlib functions for writing gzip files
* Copyright (C) 2004-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
@ -12,17 +12,19 @@
local int gz_init OF((gz_statep));
local int gz_comp OF((gz_statep, int));
local int gz_zero OF((gz_statep, z_off64_t));
local z_size_t gz_write OF((gz_statep, voidpc, z_size_t));
/* Initialize state for writing a gzip file. Mark initialization by setting
state->size to non-zero. Return -1 on failure or 0 on success. */
state.state->size to non-zero. Return -1 on a memory allocation failure, or 0 on
success. */
local int gz_init(state)
gz_statep state;
{
int ret;
z_streamp strm = &(state.state->strm);
/* allocate input buffer */
state.state->in = (unsigned char *)malloc(state.state->want);
/* allocate input buffer (double size for gzprintf) */
state.state->in = (unsigned char *)malloc(state.state->want << 1);
if (state.state->in == NULL) {
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
@ -50,6 +52,7 @@ local int gz_init(state)
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
strm->next_in = NULL;
}
/* mark state as initialized */
@ -65,17 +68,17 @@ local int gz_init(state)
}
/* Compress whatever is at avail_in and next_in and write to the output file.
Return -1 if there is an error writing to the output file, otherwise 0.
flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH,
then the deflate() state is reset to start a new gzip stream. If gz->direct
is true, then simply write to the output file without compressing, and
ignore flush. */
Return -1 if there is an error writing to the output file or if gz_init()
fails to allocate memory, otherwise 0. flush is assumed to be a valid
deflate() flush value. If flush is Z_FINISH, then the deflate() state is
reset to start a new gzip stream. If gz->direct is true, then simply write
to the output file without compressing, and ignore flush. */
local int gz_comp(state, flush)
gz_statep state;
int flush;
{
int ret, got;
unsigned have;
int ret, writ;
unsigned have, put, max = ((unsigned)-1 >> 2) + 1;
z_streamp strm = &(state.state->strm);
/* allocate memory if this is the first time through */
@ -84,12 +87,16 @@ local int gz_comp(state, flush)
/* write directly if requested */
if (state.state->direct) {
got = (int)write(state.state->fd, strm->next_in, strm->avail_in);
if (got < 0 || (unsigned)got != strm->avail_in) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
while (strm->avail_in) {
put = strm->avail_in > max ? max : strm->avail_in;
writ = write(state.state->fd, strm->next_in, put);
if (writ < 0) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
}
strm->avail_in -= (unsigned)writ;
strm->next_in += writ;
}
strm->avail_in = 0;
return 0;
}
@ -100,17 +107,21 @@ local int gz_comp(state, flush)
doing Z_FINISH then don't write until we get to Z_STREAM_END */
if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
(flush != Z_FINISH || ret == Z_STREAM_END))) {
have = (unsigned)(strm->next_out - state.state->x.next);
if (have && ((got = (int)write(state.state->fd, state.state->x.next, have)) < 0 ||
(unsigned)got != have)) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
while (strm->next_out > state.state->x.next) {
put = strm->next_out - state.state->x.next > (int)max ? max :
(unsigned)(strm->next_out - state.state->x.next);
writ = write(state.state->fd, state.state->x.next, put);
if (writ < 0) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
}
state.state->x.next += writ;
}
if (strm->avail_out == 0) {
strm->avail_out = state.state->size;
strm->next_out = state.state->out;
state.state->x.next = state.state->out;
}
state.state->x.next = strm->next_out;
}
/* compress */
@ -132,7 +143,8 @@ local int gz_comp(state, flush)
return 0;
}
/* Compress len zeros to output. Return -1 on error, 0 on success. */
/* Compress len zeros to output. Return -1 on a write error or memory
allocation failure by gz_comp(), or 0 on success. */
local int gz_zero(state, len)
gz_statep state;
z_off64_t len;
@ -164,32 +176,14 @@ local int gz_zero(state, len)
return 0;
}
/* -- see zlib.h -- */
int ZEXPORT gzwrite(file, buf, len)
gzFile file;
voidpc buf;
unsigned len;
{
unsigned put = len;
/* Write len bytes from buf to file. Return the number of bytes written. If
the returned value is less than len, then there was an error. */
local z_size_t gz_write(state, buf, len)
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return 0;
state = (gz_statep)file;
strm = &(state.state->strm);
/* check that we're writing and that there's no error */
if (state.state->mode != GZ_WRITE || state.state->err != Z_OK)
return 0;
/* since an int is returned, make sure len fits in one, otherwise return
with an error (this avoids the flaw in the interface) */
if ((int)len < 0) {
gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
return 0;
}
voidpc buf;
z_size_t len;
{
z_size_t put = len;
/* if len is zero, avoid unnecessary operations */
if (len == 0)
@ -212,14 +206,15 @@ int ZEXPORT gzwrite(file, buf, len)
do {
unsigned have, copy;
if (strm->avail_in == 0)
strm->next_in = state.state->in;
have = (unsigned)((strm->next_in + strm->avail_in) - state.state->in);
if (state.state->strm.avail_in == 0)
state.state->strm.next_in = state.state->in;
have = (unsigned)((state.state->strm.next_in + state.state->strm.avail_in) -
state.state->in);
copy = state.state->size - have;
if (copy > len)
copy = len;
memcpy(state.state->in + have, buf, copy);
strm->avail_in += copy;
state.state->strm.avail_in += copy;
state.state->x.pos += copy;
buf = (const char *)buf + copy;
len -= copy;
@ -229,19 +224,83 @@ int ZEXPORT gzwrite(file, buf, len)
}
else {
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
if (state.state->strm.avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* directly compress user buffer to file */
strm->avail_in = len;
strm->next_in = (z_const Bytef *)buf;
state.state->x.pos += len;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
state.state->strm.next_in = (z_const Bytef *)buf;
do {
unsigned n = (unsigned)-1;
if (n > len)
n = len;
state.state->strm.avail_in = n;
state.state->x.pos += n;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
len -= n;
} while (len);
}
/* input was all buffered or compressed (put will fit in int) */
return (int)put;
/* input was all buffered or compressed */
return put;
}
/* -- see zlib.h -- */
int ZEXPORT gzwrite(file, buf, len)
gzFile file;
voidpc buf;
unsigned len;
{
gz_statep state;
/* get internal structure */
if (file == NULL)
return 0;
state = (gz_statep)file;
/* check that we're writing and that there's no error */
if (state.state->mode != GZ_WRITE || state.state->err != Z_OK)
return 0;
/* since an int is returned, make sure len fits in one, otherwise return
with an error (this avoids a flaw in the interface) */
if ((int)len < 0) {
gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
return 0;
}
/* write len bytes from buf (the return value will fit in an int) */
return (int)gz_write(state, buf, len);
}
/* -- see zlib.h -- */
z_size_t ZEXPORT gzfwrite(buf, size, nitems, file)
voidpc buf;
z_size_t size;
z_size_t nitems;
gzFile file;
{
z_size_t len;
gz_statep state;
/* get internal structure */
if (file == NULL)
return 0;
state = (gz_statep)file;
/* check that we're writing and that there's no error */
if (state.state->mode != GZ_WRITE || state.state->err != Z_OK)
return 0;
/* compute bytes to read -- error on overflow */
len = nitems * size;
if (size && len / size != nitems) {
gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
return 0;
}
/* write len bytes to buf, return the number of full items written */
return len ? gz_write(state, buf, len) / size : 0;
}
/* -- see zlib.h -- */
@ -271,7 +330,7 @@ int ZEXPORT gzputc(file, c)
return -1;
}
/* try writing to input buffer for speed (state->size == 0 if buffer not
/* try writing to input buffer for speed (state.state->size == 0 if buffer not
initialized) */
if (state.state->size) {
if (strm->avail_in == 0)
@ -287,7 +346,7 @@ int ZEXPORT gzputc(file, c)
/* no room in buffer or not initialized, use gz_write() */
buf[0] = (unsigned char)c;
if (gzwrite(file, buf, 1) != 1)
if (gz_write(state, buf, 1) != 1)
return -1;
return c & 0xff;
}
@ -298,11 +357,21 @@ int ZEXPORT gzputs(file, str)
const char *str;
{
int ret;
unsigned len;
z_size_t len;
gz_statep state;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
/* check that we're writing and that there's no error */
if (state.state->mode != GZ_WRITE || state.state->err != Z_OK)
return -1;
/* write string */
len = (unsigned)strlen(str);
ret = gzwrite(file, str, len);
len = strlen(str);
ret = gz_write(state, str, len);
return ret == 0 && len != 0 ? -1 : ret;
}
@ -312,63 +381,73 @@ int ZEXPORT gzputs(file, str)
/* -- see zlib.h -- */
int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
{
int size, len;
int len;
unsigned left;
char *next;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return -1;
return Z_STREAM_ERROR;
state = (gz_statep)file;
strm = &(state.state->strm);
/* check that we're writing and that there's no error */
if (state.state->mode != GZ_WRITE || state.state->err != Z_OK)
return 0;
return Z_STREAM_ERROR;
/* make sure we have some buffer space */
if (state.state->size == 0 && gz_init(state) == -1)
return 0;
return state.state->err;
/* check for seek request */
if (state.state->seek) {
state.state->seek = 0;
if (gz_zero(state, state.state->skip) == -1)
return 0;
return state.state->err;
}
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* do the printf() into the input buffer, put length in len */
size = (int)(state.state->size);
state.state->in[size - 1] = 0;
/* do the printf() into the input buffer, put length in len -- the input
buffer is double-sized just for this function, so there is guaranteed to
be state.state->size bytes available after the current contents */
if (strm->avail_in == 0)
strm->next_in = state.state->in;
next = (char *)(state.state->in + (strm->next_in - state.state->in) + strm->avail_in);
next[state.state->size - 1] = 0;
#ifdef NO_vsnprintf
# ifdef HAS_vsprintf_void
(void)vsprintf((char *)(state.state->in), format, va);
for (len = 0; len < size; len++)
if (state.state->in[len] == 0) break;
(void)vsprintf(next, format, va);
for (len = 0; len < state.state->size; len++)
if (next[len] == 0) break;
# else
len = vsprintf((char *)(state.state->in), format, va);
len = vsprintf(next, format, va);
# endif
#else
# ifdef HAS_vsnprintf_void
(void)vsnprintf((char *)(state.state->in), size, format, va);
len = strlen((char *)(state.state->in));
(void)vsnprintf(next, state.state->size, format, va);
len = strlen(next);
# else
len = vsnprintf((char *)(state.state->in), size, format, va);
len = vsnprintf(next, state.state->size, format, va);
# endif
#endif
/* check that printf() results fit in buffer */
if (len <= 0 || len >= (int)size || state.state->in[size - 1] != 0)
if (len == 0 || (unsigned)len >= state.state->size || next[state.state->size - 1] != 0)
return 0;
/* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state.state->in;
/* update buffer and position, compress first half if past that */
strm->avail_in += (unsigned)len;
state.state->x.pos += len;
if (strm->avail_in >= state.state->size) {
left = strm->avail_in - state.state->size;
strm->avail_in = state.state->size;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return state.state->err;
memcpy(state.state->in, state.state->in + state.state->size, left);
strm->next_in = state.state->in;
strm->avail_in = left;
}
return len;
}
@ -393,73 +472,82 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
{
int size, len;
unsigned len, left;
char *next;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return -1;
return Z_STREAM_ERROR;
state = (gz_statep)file;
strm = &(state.state->strm);
/* check that can really pass pointer in ints */
if (sizeof(int) != sizeof(void *))
return 0;
return Z_STREAM_ERROR;
/* check that we're writing and that there's no error */
if (state.state->mode != GZ_WRITE || state.state->err != Z_OK)
return 0;
return Z_STREAM_ERROR;
/* make sure we have some buffer space */
if (state.state->size == 0 && gz_init(state) == -1)
return 0;
return state.state->error;
/* check for seek request */
if (state.state->seek) {
state.state->seek = 0;
if (gz_zero(state, state.state->skip) == -1)
return 0;
return state.state->error;
}
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* do the printf() into the input buffer, put length in len */
size = (int)(state.state->size);
state.state->in[size - 1] = 0;
/* do the printf() into the input buffer, put length in len -- the input
buffer is double-sized just for this function, so there is guaranteed to
be state.state->size bytes available after the current contents */
if (strm->avail_in == 0)
strm->next_in = state.state->in;
next = (char *)(strm->next_in + strm->avail_in);
next[state.state->size - 1] = 0;
#ifdef NO_snprintf
# ifdef HAS_sprintf_void
sprintf((char *)(state.state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12,
a13, a14, a15, a16, a17, a18, a19, a20);
for (len = 0; len < size; len++)
if (state.state->in[len] == 0) break;
if (next[len] == 0)
break;
# else
len = sprintf((char *)(state.state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
len = sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11,
a12, a13, a14, a15, a16, a17, a18, a19, a20);
# endif
#else
# ifdef HAS_snprintf_void
snprintf((char *)(state.state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
len = strlen((char *)(state.state->in));
snprintf(next, state.state->size, format, a1, a2, a3, a4, a5, a6, a7, a8, a9,
a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
len = strlen(next);
# else
len = snprintf((char *)(state.state->in), size, format, a1, a2, a3, a4, a5, a6,
a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,
a19, a20);
len = snprintf(next, state.state->size, format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
# endif
#endif
/* check that printf() results fit in buffer */
if (len <= 0 || len >= (int)size || state.state->in[size - 1] != 0)
if (len == 0 || len >= state.state->size || next[state.state->size - 1] != 0)
return 0;
/* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state.state->in;
/* update buffer and position, compress first half if past that */
strm->avail_in += len;
state.state->x.pos += len;
return len;
if (strm->avail_in >= state.state->size) {
left = strm->avail_in - state.state->size;
strm->avail_in = state.state->size;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return state.state->err;
memcpy(state.state->in, state.state->in + state.state->size, left);
strm->next_in = state.state->in;
strm->avail_in = left;
}
return (int)len;
}
#endif
@ -473,7 +561,7 @@ int ZEXPORT gzflush(file, flush)
/* get internal structure */
if (file == NULL)
return -1;
return Z_STREAM_ERROR;
state = (gz_statep)file;
/* check that we're writing and that there's no error */
@ -488,11 +576,11 @@ int ZEXPORT gzflush(file, flush)
if (state.state->seek) {
state.state->seek = 0;
if (gz_zero(state, state.state->skip) == -1)
return -1;
return state.state->err;
}
/* compress remaining data with requested flush */
gz_comp(state, flush);
(void)gz_comp(state, flush);
return state.state->err;
}
@ -523,13 +611,13 @@ int ZEXPORT gzsetparams(file, level, strategy)
if (state.state->seek) {
state.state->seek = 0;
if (gz_zero(state, state.state->skip) == -1)
return -1;
return state.state->err;
}
/* change compression parameters for subsequent input */
if (state.state->size) {
/* flush previous input with previous parameters before changing */
if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)
if (strm->avail_in && gz_comp(state, Z_BLOCK) == -1)
return state.state->err;
deflateParams(strm, level, strategy);
}