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Add a ./config --solo option to make zlib subset with no libary use

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A common request has been the ability to compile zlib to require no
other libraries.  This --solo option provides that ability.  The price
is that the gz*, compress*, and uncompress functions are eliminated,
and that the user must provide memory allocation and free routines to
deflate and inflate when initializing.
This commit is contained in:
Mark Adler
2011-10-07 01:57:07 -07:00
parent 518ad0177a
commit f442c1e89e
13 changed files with 537 additions and 195 deletions
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16
zlib.h
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@@ -1112,6 +1112,7 @@ ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
27-31: 0 (reserved)
*/
#ifndef Z_SOLO
/* utility functions */
@@ -1176,7 +1177,6 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
*/
/* gzip file access functions */
/*
@@ -1501,6 +1501,7 @@ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
file that is being written concurrently.
*/
#endif /* !Z_SOLO */
/* checksum functions */
@@ -1603,6 +1604,8 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, (int)sizeof(z_stream))
#ifndef Z_SOLO
/* gzgetc() macro and its supporting function and exposed data structure. Note
* that the real internal state is much larger than the exposed structure.
* This abbreviated structure exposes just enough for the gzgetc() macro. The
@@ -1667,6 +1670,13 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
#endif
#else /* Z_SOLO */
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
#endif /* !Z_SOLO */
/* hack for buggy compilers */
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
struct internal_state {int dummy;};
@@ -1677,7 +1687,9 @@ ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
ZEXTERN unsigned long ZEXPORT gzflags OF((void));
#ifndef Z_SOLO
ZEXTERN unsigned long ZEXPORT gzflags OF((void));
#endif
#ifdef __cplusplus
}