diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/drivers/common/zlib_drv.c | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/erts/emulator/drivers/common/zlib_drv.c b/erts/emulator/drivers/common/zlib_drv.c index 066cf87c9d..e8afddb01b 100644 --- a/erts/emulator/drivers/common/zlib_drv.c +++ b/erts/emulator/drivers/common/zlib_drv.c @@ -252,9 +252,9 @@ static int zlib_output(ZLibData* d) return zlib_output_init(d); } -#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY static int zlib_inflate_get_dictionary(ZLibData* d) { +#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY ErlDrvBinary* dbin = driver_alloc_binary(INFL_DICT_SZ); uInt dlen = 0; int res = inflateGetDictionary(&d->s, (unsigned char*)dbin->orig_bytes, &dlen); @@ -263,8 +263,11 @@ static int zlib_inflate_get_dictionary(ZLibData* d) } driver_free_binary(dbin); return res; -} +#else + abort(); /* never called, just to silence 'unresolved symbol' + for non-optimizing compiler */ #endif +} static int zlib_inflate(ZLibData* d, int flush) { @@ -448,10 +451,35 @@ static void zlib_free(void* data, void* addr) driver_free(addr); } +#if defined(__APPLE__) && defined(__MACH__) && defined(HAVE_ZLIB_INFLATEGETDICTIONARY) + +/* Work around broken build system with runtime version test */ +static int have_inflateGetDictionary; + +static int zlib_init() +{ + unsigned int v[4] = {0, 0, 0, 0}; + unsigned hexver; + + sscanf(zlibVersion(), "%u.%u.%u.%u", &v[0], &v[1], &v[2], &v[3]); + + hexver = (v[0] << (8*3)) | (v[1] << (8*2)) | (v[2] << (8)) | v[3]; + + have_inflateGetDictionary = (hexver >= 0x1020701); /* 1.2.7.1 */ + + return 0; +} +#else /* trust configure got it right */ +# ifdef HAVE_ZLIB_INFLATEGETDICTIONARY +# define have_inflateGetDictionary 1 +# else +# define have_inflateGetDictionary 0 +# endif static int zlib_init() { return 0; } +#endif static ErlDrvData zlib_start(ErlDrvPort port, char* buf) { @@ -605,14 +633,14 @@ static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *bu return zlib_return(res, rbuf, rlen); case INFLATE_GETDICT: -#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY - if (d->state != ST_INFLATE) goto badarg; - res = zlib_inflate_get_dictionary(d); + if (have_inflateGetDictionary) { + if (d->state != ST_INFLATE) goto badarg; + res = zlib_inflate_get_dictionary(d); + } else { + errno = ENOTSUP; + res = Z_ERRNO; + } return zlib_return(res, rbuf, rlen); -#else - errno = ENOTSUP; - return zlib_return(Z_ERRNO, rbuf, rlen); -#endif case INFLATE_SYNC: if (d->state != ST_INFLATE) goto badarg; |