+++ /dev/null
-/* gzwrite.c -- zlib functions for writing gzip files\r
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler\r
- * For conditions of distribution and use, see copyright notice in zlib.h\r
- */\r
-\r
-#include "gzguts.h"\r
-\r
-/* Local functions */\r
-local int gz_init OF((gz_statep));\r
-local int gz_comp OF((gz_statep, int));\r
-local int gz_zero OF((gz_statep, z_off64_t));\r
-\r
-/* Initialize state for writing a gzip file. Mark initialization by setting\r
- state->size to non-zero. Return -1 on failure or 0 on success. */\r
-local int gz_init(state)\r
- gz_statep state;\r
-{\r
- int ret;\r
- z_streamp strm = &(state->strm);\r
-\r
- /* allocate input buffer */\r
- state->in = (unsigned char *)malloc(state->want);\r
- if (state->in == NULL) {\r
- gz_error(state, Z_MEM_ERROR, "out of memory");\r
- return -1;\r
- }\r
-\r
- /* only need output buffer and deflate state if compressing */\r
- if (!state->direct) {\r
- /* allocate output buffer */\r
- state->out = (unsigned char *)malloc(state->want);\r
- if (state->out == NULL) {\r
- free(state->in);\r
- gz_error(state, Z_MEM_ERROR, "out of memory");\r
- return -1;\r
- }\r
-\r
- /* allocate deflate memory, set up for gzip compression */\r
- strm->zalloc = Z_NULL;\r
- strm->zfree = Z_NULL;\r
- strm->opaque = Z_NULL;\r
- ret = deflateInit2(strm, state->level, Z_DEFLATED,\r
- MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);\r
- if (ret != Z_OK) {\r
- free(state->out);\r
- free(state->in);\r
- gz_error(state, Z_MEM_ERROR, "out of memory");\r
- return -1;\r
- }\r
- }\r
-\r
- /* mark state as initialized */\r
- state->size = state->want;\r
-\r
- /* initialize write buffer if compressing */\r
- if (!state->direct) {\r
- strm->avail_out = state->size;\r
- strm->next_out = state->out;\r
- state->x.next = strm->next_out;\r
- }\r
- return 0;\r
-}\r
-\r
-/* Compress whatever is at avail_in and next_in and write to the output file.\r
- Return -1 if there is an error writing to the output file, otherwise 0.\r
- flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH,\r
- then the deflate() state is reset to start a new gzip stream. If gz->direct\r
- is true, then simply write to the output file without compressing, and\r
- ignore flush. */\r
-local int gz_comp(state, flush)\r
- gz_statep state;\r
- int flush;\r
-{\r
- int ret, got;\r
- unsigned have;\r
- z_streamp strm = &(state->strm);\r
-\r
- /* allocate memory if this is the first time through */\r
- if (state->size == 0 && gz_init(state) == -1)\r
- return -1;\r
-\r
- /* write directly if requested */\r
- if (state->direct) {\r
- got = write(state->fd, strm->next_in, strm->avail_in);\r
- if (got < 0 || (unsigned)got != strm->avail_in) {\r
- gz_error(state, Z_ERRNO, zstrerror());\r
- return -1;\r
- }\r
- strm->avail_in = 0;\r
- return 0;\r
- }\r
-\r
- /* run deflate() on provided input until it produces no more output */\r
- ret = Z_OK;\r
- do {\r
- /* write out current buffer contents if full, or if flushing, but if\r
- doing Z_FINISH then don't write until we get to Z_STREAM_END */\r
- if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&\r
- (flush != Z_FINISH || ret == Z_STREAM_END))) {\r
- have = (unsigned)(strm->next_out - state->x.next);\r
- if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||\r
- (unsigned)got != have)) {\r
- gz_error(state, Z_ERRNO, zstrerror());\r
- return -1;\r
- }\r
- if (strm->avail_out == 0) {\r
- strm->avail_out = state->size;\r
- strm->next_out = state->out;\r
- }\r
- state->x.next = strm->next_out;\r
- }\r
-\r
- /* compress */\r
- have = strm->avail_out;\r
- ret = deflate(strm, flush);\r
- if (ret == Z_STREAM_ERROR) {\r
- gz_error(state, Z_STREAM_ERROR,\r
- "internal error: deflate stream corrupt");\r
- return -1;\r
- }\r
- have -= strm->avail_out;\r
- } while (have);\r
-\r
- /* if that completed a deflate stream, allow another to start */\r
- if (flush == Z_FINISH)\r
- deflateReset(strm);\r
-\r
- /* all done, no errors */\r
- return 0;\r
-}\r
-\r
-/* Compress len zeros to output. Return -1 on error, 0 on success. */\r
-local int gz_zero(state, len)\r
- gz_statep state;\r
- z_off64_t len;\r
-{\r
- int first;\r
- unsigned n;\r
- z_streamp strm = &(state->strm);\r
-\r
- /* consume whatever's left in the input buffer */\r
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
- return -1;\r
-\r
- /* compress len zeros (len guaranteed > 0) */\r
- first = 1;\r
- while (len) {\r
- n = GT_OFF(state->size) || (z_off64_t)state->size > len ?\r
- (unsigned)len : state->size;\r
- if (first) {\r
- memset(state->in, 0, n);\r
- first = 0;\r
- }\r
- strm->avail_in = n;\r
- strm->next_in = state->in;\r
- state->x.pos += n;\r
- if (gz_comp(state, Z_NO_FLUSH) == -1)\r
- return -1;\r
- len -= n;\r
- }\r
- return 0;\r
-}\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORT gzwrite(file, buf, len)\r
- gzFile file;\r
- voidpc buf;\r
- unsigned len;\r
-{\r
- unsigned put = len;\r
- gz_statep state;\r
- z_streamp strm;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return 0;\r
- state = (gz_statep)file;\r
- strm = &(state->strm);\r
-\r
- /* check that we're writing and that there's no error */\r
- if (state->mode != GZ_WRITE || state->err != Z_OK)\r
- return 0;\r
-\r
- /* since an int is returned, make sure len fits in one, otherwise return\r
- with an error (this avoids the flaw in the interface) */\r
- if ((int)len < 0) {\r
- gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");\r
- return 0;\r
- }\r
-\r
- /* if len is zero, avoid unnecessary operations */\r
- if (len == 0)\r
- return 0;\r
-\r
- /* allocate memory if this is the first time through */\r
- if (state->size == 0 && gz_init(state) == -1)\r
- return 0;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- return 0;\r
- }\r
-\r
- /* for small len, copy to input buffer, otherwise compress directly */\r
- if (len < state->size) {\r
- /* copy to input buffer, compress when full */\r
- do {\r
- unsigned have, copy;\r
-\r
- if (strm->avail_in == 0)\r
- strm->next_in = state->in;\r
- have = (unsigned)((strm->next_in + strm->avail_in) - state->in);\r
- copy = state->size - have;\r
- if (copy > len)\r
- copy = len;\r
- memcpy(state->in + have, buf, copy);\r
- strm->avail_in += copy;\r
- state->x.pos += copy;\r
- buf = (const char *)buf + copy;\r
- len -= copy;\r
- if (len && gz_comp(state, Z_NO_FLUSH) == -1)\r
- return 0;\r
- } while (len);\r
- }\r
- else {\r
- /* consume whatever's left in the input buffer */\r
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
- return 0;\r
-\r
- /* directly compress user buffer to file */\r
- strm->avail_in = len;\r
- strm->next_in = (z_const Bytef *)buf;\r
- state->x.pos += len;\r
- if (gz_comp(state, Z_NO_FLUSH) == -1)\r
- return 0;\r
- }\r
-\r
- /* input was all buffered or compressed (put will fit in int) */\r
- return (int)put;\r
-}\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORT gzputc(file, c)\r
- gzFile file;\r
- int c;\r
-{\r
- unsigned have;\r
- unsigned char buf[1];\r
- gz_statep state;\r
- z_streamp strm;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return -1;\r
- state = (gz_statep)file;\r
- strm = &(state->strm);\r
-\r
- /* check that we're writing and that there's no error */\r
- if (state->mode != GZ_WRITE || state->err != Z_OK)\r
- return -1;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- return -1;\r
- }\r
-\r
- /* try writing to input buffer for speed (state->size == 0 if buffer not\r
- initialized) */\r
- if (state->size) {\r
- if (strm->avail_in == 0)\r
- strm->next_in = state->in;\r
- have = (unsigned)((strm->next_in + strm->avail_in) - state->in);\r
- if (have < state->size) {\r
- state->in[have] = c;\r
- strm->avail_in++;\r
- state->x.pos++;\r
- return c & 0xff;\r
- }\r
- }\r
-\r
- /* no room in buffer or not initialized, use gz_write() */\r
- buf[0] = c;\r
- if (gzwrite(file, buf, 1) != 1)\r
- return -1;\r
- return c & 0xff;\r
-}\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORT gzputs(file, str)\r
- gzFile file;\r
- const char *str;\r
-{\r
- int ret;\r
- unsigned len;\r
-\r
- /* write string */\r
- len = (unsigned)strlen(str);\r
- ret = gzwrite(file, str, len);\r
- return ret == 0 && len != 0 ? -1 : ret;\r
-}\r
-\r
-#if defined(STDC) || defined(Z_HAVE_STDARG_H)\r
-#include <stdarg.h>\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)\r
-{\r
- int size, len;\r
- gz_statep state;\r
- z_streamp strm;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return -1;\r
- state = (gz_statep)file;\r
- strm = &(state->strm);\r
-\r
- /* check that we're writing and that there's no error */\r
- if (state->mode != GZ_WRITE || state->err != Z_OK)\r
- return 0;\r
-\r
- /* make sure we have some buffer space */\r
- if (state->size == 0 && gz_init(state) == -1)\r
- return 0;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- return 0;\r
- }\r
-\r
- /* consume whatever's left in the input buffer */\r
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
- return 0;\r
-\r
- /* do the printf() into the input buffer, put length in len */\r
- size = (int)(state->size);\r
- state->in[size - 1] = 0;\r
-#ifdef NO_vsnprintf\r
-# ifdef HAS_vsprintf_void\r
- (void)vsprintf((char *)(state->in), format, va);\r
- for (len = 0; len < size; len++)\r
- if (state->in[len] == 0) break;\r
-# else\r
- len = vsprintf((char *)(state->in), format, va);\r
-# endif\r
-#else\r
-# ifdef HAS_vsnprintf_void\r
- (void)vsnprintf((char *)(state->in), size, format, va);\r
- len = strlen((char *)(state->in));\r
-# else\r
- len = vsnprintf((char *)(state->in), size, format, va);\r
-# endif\r
-#endif\r
-\r
- /* check that printf() results fit in buffer */\r
- if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)\r
- return 0;\r
-\r
- /* update buffer and position, defer compression until needed */\r
- strm->avail_in = (unsigned)len;\r
- strm->next_in = state->in;\r
- state->x.pos += len;\r
- return len;\r
-}\r
-\r
-int ZEXPORTVA gzprintf(gzFile file, const char *format, ...)\r
-{\r
- va_list va;\r
- int ret;\r
-\r
- va_start(va, format);\r
- ret = gzvprintf(file, format, va);\r
- va_end(va);\r
- return ret;\r
-}\r
-\r
-#else /* !STDC && !Z_HAVE_STDARG_H */\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,\r
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)\r
- gzFile file;\r
- const char *format;\r
- int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,\r
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;\r
-{\r
- int size, len;\r
- gz_statep state;\r
- z_streamp strm;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return -1;\r
- state = (gz_statep)file;\r
- strm = &(state->strm);\r
-\r
- /* check that can really pass pointer in ints */\r
- if (sizeof(int) != sizeof(void *))\r
- return 0;\r
-\r
- /* check that we're writing and that there's no error */\r
- if (state->mode != GZ_WRITE || state->err != Z_OK)\r
- return 0;\r
-\r
- /* make sure we have some buffer space */\r
- if (state->size == 0 && gz_init(state) == -1)\r
- return 0;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- return 0;\r
- }\r
-\r
- /* consume whatever's left in the input buffer */\r
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)\r
- return 0;\r
-\r
- /* do the printf() into the input buffer, put length in len */\r
- size = (int)(state->size);\r
- state->in[size - 1] = 0;\r
-#ifdef NO_snprintf\r
-# ifdef HAS_sprintf_void\r
- sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,\r
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);\r
- for (len = 0; len < size; len++)\r
- if (state->in[len] == 0) break;\r
-# else\r
- len = sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,\r
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);\r
-# endif\r
-#else\r
-# ifdef HAS_snprintf_void\r
- snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,\r
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);\r
- len = strlen((char *)(state->in));\r
-# else\r
- len = snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6,\r
- a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,\r
- a19, a20);\r
-# endif\r
-#endif\r
-\r
- /* check that printf() results fit in buffer */\r
- if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)\r
- return 0;\r
-\r
- /* update buffer and position, defer compression until needed */\r
- strm->avail_in = (unsigned)len;\r
- strm->next_in = state->in;\r
- state->x.pos += len;\r
- return len;\r
-}\r
-\r
-#endif\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORT gzflush(file, flush)\r
- gzFile file;\r
- int flush;\r
-{\r
- gz_statep state;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return -1;\r
- state = (gz_statep)file;\r
-\r
- /* check that we're writing and that there's no error */\r
- if (state->mode != GZ_WRITE || state->err != Z_OK)\r
- return Z_STREAM_ERROR;\r
-\r
- /* check flush parameter */\r
- if (flush < 0 || flush > Z_FINISH)\r
- return Z_STREAM_ERROR;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- return -1;\r
- }\r
-\r
- /* compress remaining data with requested flush */\r
- gz_comp(state, flush);\r
- return state->err;\r
-}\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORT gzsetparams(file, level, strategy)\r
- gzFile file;\r
- int level;\r
- int strategy;\r
-{\r
- gz_statep state;\r
- z_streamp strm;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return Z_STREAM_ERROR;\r
- state = (gz_statep)file;\r
- strm = &(state->strm);\r
-\r
- /* check that we're writing and that there's no error */\r
- if (state->mode != GZ_WRITE || state->err != Z_OK)\r
- return Z_STREAM_ERROR;\r
-\r
- /* if no change is requested, then do nothing */\r
- if (level == state->level && strategy == state->strategy)\r
- return Z_OK;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- return -1;\r
- }\r
-\r
- /* change compression parameters for subsequent input */\r
- if (state->size) {\r
- /* flush previous input with previous parameters before changing */\r
- if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)\r
- return state->err;\r
- deflateParams(strm, level, strategy);\r
- }\r
- state->level = level;\r
- state->strategy = strategy;\r
- return Z_OK;\r
-}\r
-\r
-/* -- see zlib.h -- */\r
-int ZEXPORT gzclose_w(file)\r
- gzFile file;\r
-{\r
- int ret = Z_OK;\r
- gz_statep state;\r
-\r
- /* get internal structure */\r
- if (file == NULL)\r
- return Z_STREAM_ERROR;\r
- state = (gz_statep)file;\r
-\r
- /* check that we're writing */\r
- if (state->mode != GZ_WRITE)\r
- return Z_STREAM_ERROR;\r
-\r
- /* check for seek request */\r
- if (state->seek) {\r
- state->seek = 0;\r
- if (gz_zero(state, state->skip) == -1)\r
- ret = state->err;\r
- }\r
-\r
- /* flush, free memory, and close file */\r
- if (gz_comp(state, Z_FINISH) == -1)\r
- ret = state->err;\r
- if (state->size) {\r
- if (!state->direct) {\r
- (void)deflateEnd(&(state->strm));\r
- free(state->out);\r
- }\r
- free(state->in);\r
- }\r
- gz_error(state, Z_OK, NULL);\r
- free(state->path);\r
- if (close(state->fd) == -1)\r
- ret = Z_ERRNO;\r
- free(state);\r
- return ret;\r
-}\r
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