diff options
Diffstat (limited to 'src/Common/zlib/gzwrite.c')
-rw-r--r-- | src/Common/zlib/gzwrite.c | 118 |
1 files changed, 42 insertions, 76 deletions
diff --git a/src/Common/zlib/gzwrite.c b/src/Common/zlib/gzwrite.c index c7b5651d..435b4621 100644 --- a/src/Common/zlib/gzwrite.c +++ b/src/Common/zlib/gzwrite.c @@ -1,22 +1,14 @@ /* gzwrite.c -- zlib functions for writing gzip files - * Copyright (C) 2004-2017 Mark Adler + * Copyright (C) 2004-2019 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; -{ +local int gz_init(gz_statep state) { int ret; z_streamp strm = &(state->strm); @@ -70,10 +62,7 @@ local int gz_init(state) 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; -{ +local int gz_comp(gz_statep state, int flush) { int ret, writ; unsigned have, put, max = ((unsigned)-1 >> 2) + 1; z_streamp strm = &(state->strm); @@ -97,6 +86,15 @@ local int gz_comp(state, flush) return 0; } + /* check for a pending reset */ + if (state->reset) { + /* don't start a new gzip member unless there is data to write */ + if (strm->avail_in == 0) + return 0; + deflateReset(strm); + state->reset = 0; + } + /* run deflate() on provided input until it produces no more output */ ret = Z_OK; do { @@ -134,7 +132,7 @@ local int gz_comp(state, flush) /* if that completed a deflate stream, allow another to start */ if (flush == Z_FINISH) - deflateReset(strm); + state->reset = 1; /* all done, no errors */ return 0; @@ -142,10 +140,7 @@ local int gz_comp(state, flush) /* 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; -{ +local int gz_zero(gz_statep state, z_off64_t len) { int first; unsigned n; z_streamp strm = &(state->strm); @@ -175,11 +170,7 @@ local int gz_zero(state, 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; - voidpc buf; - z_size_t len; -{ +local z_size_t gz_write(gz_statep state, voidpc buf, z_size_t len) { z_size_t put = len; /* if len is zero, avoid unnecessary operations */ @@ -209,7 +200,7 @@ local z_size_t gz_write(state, buf, len) state->in); copy = state->size - have; if (copy > len) - copy = len; + copy = (unsigned)len; memcpy(state->in + have, buf, copy); state->strm.avail_in += copy; state->x.pos += copy; @@ -229,7 +220,7 @@ local z_size_t gz_write(state, buf, len) do { unsigned n = (unsigned)-1; if (n > len) - n = len; + n = (unsigned)len; state->strm.avail_in = n; state->x.pos += n; if (gz_comp(state, Z_NO_FLUSH) == -1) @@ -243,11 +234,7 @@ local z_size_t gz_write(state, buf, len) } /* -- see zlib.h -- */ -int ZEXPORT gzwrite(file, buf, len) - gzFile file; - voidpc buf; - unsigned len; -{ +int ZEXPORT gzwrite(gzFile file, voidpc buf, unsigned len) { gz_statep state; /* get internal structure */ @@ -271,12 +258,8 @@ int ZEXPORT gzwrite(file, 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 ZEXPORT gzfwrite(voidpc buf, z_size_t size, z_size_t nitems, + gzFile file) { z_size_t len; gz_statep state; @@ -301,10 +284,7 @@ z_size_t ZEXPORT gzfwrite(buf, size, nitems, file) } /* -- see zlib.h -- */ -int ZEXPORT gzputc(file, c) - gzFile file; - int c; -{ +int ZEXPORT gzputc(gzFile file, int c) { unsigned have; unsigned char buf[1]; gz_statep state; @@ -349,12 +329,8 @@ int ZEXPORT gzputc(file, c) } /* -- see zlib.h -- */ -int ZEXPORT gzputs(file, str) - gzFile file; - const char *str; -{ - int ret; - z_size_t len; +int ZEXPORT gzputs(gzFile file, const char *s) { + z_size_t len, put; gz_statep state; /* get internal structure */ @@ -367,17 +343,20 @@ int ZEXPORT gzputs(file, str) return -1; /* write string */ - len = strlen(str); - ret = gz_write(state, str, len); - return ret == 0 && len != 0 ? -1 : ret; + len = strlen(s); + if ((int)len < 0 || (unsigned)len != len) { + gz_error(state, Z_STREAM_ERROR, "string length does not fit in int"); + return -1; + } + put = gz_write(state, s, len); + return put < len ? -1 : (int)len; } #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 ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va) { int len; unsigned left; char *next; @@ -441,15 +420,14 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va) strm->avail_in = state->size; if (gz_comp(state, Z_NO_FLUSH) == -1) return state->err; - memcpy(state->in, state->in + state->size, left); + memmove(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, ...) -{ +int ZEXPORTVA gzprintf(gzFile file, const char *format, ...) { va_list va; int ret; @@ -462,13 +440,10 @@ int ZEXPORTVA gzprintf(gzFile file, const char *format, ...) #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; -{ +int ZEXPORTVA gzprintf(gzFile file, const char *format, int a1, int a2, int a3, + int a4, int a5, int a6, int a7, int a8, int a9, int a10, + int a11, int a12, int a13, int a14, int a15, int a16, + int a17, int a18, int a19, int a20) { unsigned len, left; char *next; gz_statep state; @@ -540,7 +515,7 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, strm->avail_in = state->size; if (gz_comp(state, Z_NO_FLUSH) == -1) return state->err; - memcpy(state->in, state->in + state->size, left); + memmove(state->in, state->in + state->size, left); strm->next_in = state->in; strm->avail_in = left; } @@ -550,10 +525,7 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, #endif /* -- see zlib.h -- */ -int ZEXPORT gzflush(file, flush) - gzFile file; - int flush; -{ +int ZEXPORT gzflush(gzFile file, int flush) { gz_statep state; /* get internal structure */ @@ -582,11 +554,7 @@ int ZEXPORT gzflush(file, flush) } /* -- see zlib.h -- */ -int ZEXPORT gzsetparams(file, level, strategy) - gzFile file; - int level; - int strategy; -{ +int ZEXPORT gzsetparams(gzFile file, int level, int strategy) { gz_statep state; z_streamp strm; @@ -597,7 +565,7 @@ int ZEXPORT gzsetparams(file, level, strategy) strm = &(state->strm); /* check that we're writing and that there's no error */ - if (state->mode != GZ_WRITE || state->err != Z_OK) + if (state->mode != GZ_WRITE || state->err != Z_OK || state->direct) return Z_STREAM_ERROR; /* if no change is requested, then do nothing */ @@ -624,9 +592,7 @@ int ZEXPORT gzsetparams(file, level, strategy) } /* -- see zlib.h -- */ -int ZEXPORT gzclose_w(file) - gzFile file; -{ +int ZEXPORT gzclose_w(gzFile file) { int ret = Z_OK; gz_statep state; |