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-rw-r--r--zlib/gzwrite.c665
1 files changed, 0 insertions, 665 deletions
diff --git a/zlib/gzwrite.c b/zlib/gzwrite.c
deleted file mode 100644
index c7b5651..0000000
--- a/zlib/gzwrite.c
+++ /dev/null
@@ -1,665 +0,0 @@
-/* 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"
-
-/* Local functions */
-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 a memory allocation failure, or 0 on
- success. */
-local int gz_init(state)
- gz_statep state;
-{
- int ret;
- z_streamp strm = &(state->strm);
-
- /* allocate input buffer (double size for gzprintf) */
- state->in = (unsigned char *)malloc(state->want << 1);
- if (state->in == NULL) {
- gz_error(state, Z_MEM_ERROR, "out of memory");
- return -1;
- }
-
- /* only need output buffer and deflate state if compressing */
- if (!state->direct) {
- /* allocate output buffer */
- state->out = (unsigned char *)malloc(state->want);
- if (state->out == NULL) {
- free(state->in);
- gz_error(state, Z_MEM_ERROR, "out of memory");
- return -1;
- }
-
- /* allocate deflate memory, set up for gzip compression */
- strm->zalloc = Z_NULL;
- strm->zfree = Z_NULL;
- strm->opaque = Z_NULL;
- ret = deflateInit2(strm, state->level, Z_DEFLATED,
- MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);
- if (ret != Z_OK) {
- free(state->out);
- free(state->in);
- gz_error(state, Z_MEM_ERROR, "out of memory");
- return -1;
- }
- strm->next_in = NULL;
- }
-
- /* mark state as initialized */
- state->size = state->want;
-
- /* initialize write buffer if compressing */
- if (!state->direct) {
- strm->avail_out = state->size;
- strm->next_out = state->out;
- state->x.next = strm->next_out;
- }
- return 0;
-}
-
-/* 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 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, writ;
- unsigned have, put, max = ((unsigned)-1 >> 2) + 1;
- z_streamp strm = &(state->strm);
-
- /* allocate memory if this is the first time through */
- if (state->size == 0 && gz_init(state) == -1)
- return -1;
-
- /* write directly if requested */
- if (state->direct) {
- while (strm->avail_in) {
- put = strm->avail_in > max ? max : strm->avail_in;
- writ = write(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;
- }
- return 0;
- }
-
- /* run deflate() on provided input until it produces no more output */
- ret = Z_OK;
- do {
- /* write out current buffer contents if full, or if flushing, but if
- 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))) {
- while (strm->next_out > state->x.next) {
- put = strm->next_out - state->x.next > (int)max ? max :
- (unsigned)(strm->next_out - state->x.next);
- writ = write(state->fd, state->x.next, put);
- if (writ < 0) {
- gz_error(state, Z_ERRNO, zstrerror());
- return -1;
- }
- state->x.next += writ;
- }
- if (strm->avail_out == 0) {
- strm->avail_out = state->size;
- strm->next_out = state->out;
- state->x.next = state->out;
- }
- }
-
- /* compress */
- have = strm->avail_out;
- ret = deflate(strm, flush);
- if (ret == Z_STREAM_ERROR) {
- gz_error(state, Z_STREAM_ERROR,
- "internal error: deflate stream corrupt");
- return -1;
- }
- have -= strm->avail_out;
- } while (have);
-
- /* if that completed a deflate stream, allow another to start */
- if (flush == Z_FINISH)
- deflateReset(strm);
-
- /* all done, no errors */
- return 0;
-}
-
-/* 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;
-{
- int first;
- unsigned n;
- z_streamp strm = &(state->strm);
-
- /* consume whatever's left in the input buffer */
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
- return -1;
-
- /* compress len zeros (len guaranteed > 0) */
- first = 1;
- while (len) {
- n = GT_OFF(state->size) || (z_off64_t)state->size > len ?
- (unsigned)len : state->size;
- if (first) {
- memset(state->in, 0, n);
- first = 0;
- }
- strm->avail_in = n;
- strm->next_in = state->in;
- state->x.pos += n;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return -1;
- len -= n;
- }
- return 0;
-}
-
-/* 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;
- voidpc buf;
- z_size_t len;
-{
- z_size_t put = len;
-
- /* if len is zero, avoid unnecessary operations */
- if (len == 0)
- return 0;
-
- /* allocate memory if this is the first time through */
- if (state->size == 0 && gz_init(state) == -1)
- return 0;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- return 0;
- }
-
- /* for small len, copy to input buffer, otherwise compress directly */
- if (len < state->size) {
- /* copy to input buffer, compress when full */
- do {
- unsigned have, copy;
-
- if (state->strm.avail_in == 0)
- state->strm.next_in = state->in;
- have = (unsigned)((state->strm.next_in + state->strm.avail_in) -
- state->in);
- copy = state->size - have;
- if (copy > len)
- copy = len;
- memcpy(state->in + have, buf, copy);
- state->strm.avail_in += copy;
- state->x.pos += copy;
- buf = (const char *)buf + copy;
- len -= copy;
- if (len && gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
- } while (len);
- }
- else {
- /* consume whatever's left in the input buffer */
- if (state->strm.avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
-
- /* directly compress user buffer to file */
- state->strm.next_in = (z_const Bytef *)buf;
- do {
- unsigned n = (unsigned)-1;
- if (n > len)
- n = len;
- state->strm.avail_in = n;
- state->x.pos += n;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
- len -= n;
- } while (len);
- }
-
- /* 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->mode != GZ_WRITE || 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->mode != GZ_WRITE || 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 -- */
-int ZEXPORT gzputc(file, c)
- gzFile file;
- int c;
-{
- unsigned have;
- unsigned char buf[1];
- gz_statep state;
- z_streamp strm;
-
- /* get internal structure */
- if (file == NULL)
- return -1;
- state = (gz_statep)file;
- strm = &(state->strm);
-
- /* check that we're writing and that there's no error */
- if (state->mode != GZ_WRITE || state->err != Z_OK)
- return -1;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- return -1;
- }
-
- /* try writing to input buffer for speed (state->size == 0 if buffer not
- initialized) */
- if (state->size) {
- if (strm->avail_in == 0)
- strm->next_in = state->in;
- have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
- if (have < state->size) {
- state->in[have] = (unsigned char)c;
- strm->avail_in++;
- state->x.pos++;
- return c & 0xff;
- }
- }
-
- /* no room in buffer or not initialized, use gz_write() */
- buf[0] = (unsigned char)c;
- if (gz_write(state, buf, 1) != 1)
- return -1;
- return c & 0xff;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzputs(file, str)
- gzFile file;
- const char *str;
-{
- int ret;
- 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->mode != GZ_WRITE || state->err != Z_OK)
- return -1;
-
- /* write string */
- len = strlen(str);
- ret = gz_write(state, str, len);
- return ret == 0 && len != 0 ? -1 : ret;
-}
-
-#if defined(STDC) || defined(Z_HAVE_STDARG_H)
-#include <stdarg.h>
-
-/* -- see zlib.h -- */
-int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
-{
- int len;
- unsigned left;
- char *next;
- gz_statep state;
- z_streamp strm;
-
- /* get internal structure */
- if (file == NULL)
- return Z_STREAM_ERROR;
- state = (gz_statep)file;
- strm = &(state->strm);
-
- /* check that we're writing and that there's no error */
- if (state->mode != GZ_WRITE || state->err != Z_OK)
- return Z_STREAM_ERROR;
-
- /* make sure we have some buffer space */
- if (state->size == 0 && gz_init(state) == -1)
- return state->err;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- return state->err;
- }
-
- /* 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->size bytes available after the current contents */
- if (strm->avail_in == 0)
- strm->next_in = state->in;
- next = (char *)(state->in + (strm->next_in - state->in) + strm->avail_in);
- next[state->size - 1] = 0;
-#ifdef NO_vsnprintf
-# ifdef HAS_vsprintf_void
- (void)vsprintf(next, format, va);
- for (len = 0; len < state->size; len++)
- if (next[len] == 0) break;
-# else
- len = vsprintf(next, format, va);
-# endif
-#else
-# ifdef HAS_vsnprintf_void
- (void)vsnprintf(next, state->size, format, va);
- len = strlen(next);
-# else
- len = vsnprintf(next, state->size, format, va);
-# endif
-#endif
-
- /* check that printf() results fit in buffer */
- if (len == 0 || (unsigned)len >= state->size || next[state->size - 1] != 0)
- return 0;
-
- /* update buffer and position, compress first half if past that */
- strm->avail_in += (unsigned)len;
- state->x.pos += len;
- if (strm->avail_in >= state->size) {
- left = strm->avail_in - state->size;
- strm->avail_in = state->size;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return state->err;
- memcpy(state->in, state->in + state->size, left);
- strm->next_in = state->in;
- strm->avail_in = left;
- }
- return len;
-}
-
-int ZEXPORTVA gzprintf(gzFile file, const char *format, ...)
-{
- va_list va;
- int ret;
-
- va_start(va, format);
- ret = gzvprintf(file, format, va);
- va_end(va);
- return ret;
-}
-
-#else /* !STDC && !Z_HAVE_STDARG_H */
-
-/* -- see zlib.h -- */
-int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
- gzFile file;
- const char *format;
- int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
-{
- unsigned len, left;
- char *next;
- gz_statep state;
- z_streamp strm;
-
- /* get internal structure */
- if (file == NULL)
- return Z_STREAM_ERROR;
- state = (gz_statep)file;
- strm = &(state->strm);
-
- /* check that can really pass pointer in ints */
- if (sizeof(int) != sizeof(void *))
- return Z_STREAM_ERROR;
-
- /* check that we're writing and that there's no error */
- if (state->mode != GZ_WRITE || state->err != Z_OK)
- return Z_STREAM_ERROR;
-
- /* make sure we have some buffer space */
- if (state->size == 0 && gz_init(state) == -1)
- return state->error;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- return state->error;
- }
-
- /* 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->size bytes available after the current contents */
- if (strm->avail_in == 0)
- strm->next_in = state->in;
- next = (char *)(strm->next_in + strm->avail_in);
- next[state->size - 1] = 0;
-#ifdef NO_snprintf
-# ifdef HAS_sprintf_void
- 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 (next[len] == 0)
- break;
-# else
- 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(next, 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(next, 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 >= state->size || next[state->size - 1] != 0)
- return 0;
-
- /* update buffer and position, compress first half if past that */
- strm->avail_in += len;
- state->x.pos += len;
- if (strm->avail_in >= state->size) {
- left = strm->avail_in - state->size;
- strm->avail_in = state->size;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return state->err;
- memcpy(state->in, state->in + state->size, left);
- strm->next_in = state->in;
- strm->avail_in = left;
- }
- return (int)len;
-}
-
-#endif
-
-/* -- see zlib.h -- */
-int ZEXPORT gzflush(file, flush)
- gzFile file;
- int flush;
-{
- gz_statep state;
-
- /* get internal structure */
- if (file == NULL)
- return Z_STREAM_ERROR;
- state = (gz_statep)file;
-
- /* check that we're writing and that there's no error */
- if (state->mode != GZ_WRITE || state->err != Z_OK)
- return Z_STREAM_ERROR;
-
- /* check flush parameter */
- if (flush < 0 || flush > Z_FINISH)
- return Z_STREAM_ERROR;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- return state->err;
- }
-
- /* compress remaining data with requested flush */
- (void)gz_comp(state, flush);
- return state->err;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzsetparams(file, level, strategy)
- gzFile file;
- int level;
- int strategy;
-{
- gz_statep state;
- z_streamp strm;
-
- /* get internal structure */
- if (file == NULL)
- return Z_STREAM_ERROR;
- state = (gz_statep)file;
- strm = &(state->strm);
-
- /* check that we're writing and that there's no error */
- if (state->mode != GZ_WRITE || state->err != Z_OK)
- return Z_STREAM_ERROR;
-
- /* if no change is requested, then do nothing */
- if (level == state->level && strategy == state->strategy)
- return Z_OK;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- return state->err;
- }
-
- /* change compression parameters for subsequent input */
- if (state->size) {
- /* flush previous input with previous parameters before changing */
- if (strm->avail_in && gz_comp(state, Z_BLOCK) == -1)
- return state->err;
- deflateParams(strm, level, strategy);
- }
- state->level = level;
- state->strategy = strategy;
- return Z_OK;
-}
-
-/* -- see zlib.h -- */
-int ZEXPORT gzclose_w(file)
- gzFile file;
-{
- int ret = Z_OK;
- gz_statep state;
-
- /* get internal structure */
- if (file == NULL)
- return Z_STREAM_ERROR;
- state = (gz_statep)file;
-
- /* check that we're writing */
- if (state->mode != GZ_WRITE)
- return Z_STREAM_ERROR;
-
- /* check for seek request */
- if (state->seek) {
- state->seek = 0;
- if (gz_zero(state, state->skip) == -1)
- ret = state->err;
- }
-
- /* flush, free memory, and close file */
- if (gz_comp(state, Z_FINISH) == -1)
- ret = state->err;
- if (state->size) {
- if (!state->direct) {
- (void)deflateEnd(&(state->strm));
- free(state->out);
- }
- free(state->in);
- }
- gz_error(state, Z_OK, NULL);
- free(state->path);
- if (close(state->fd) == -1)
- ret = Z_ERRNO;
- free(state);
- return ret;
-}
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