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authorSverker Eriksson <[email protected]>2017-08-30 21:00:35 +0200
committerSverker Eriksson <[email protected]>2017-08-30 21:00:35 +0200
commit44a83c8860bbd00878c720a7b9d940b4630bab8a (patch)
tree101b3c52ec505a94f56c8f70e078ecb8a2e8c6cd /erts/emulator/drivers/common/zlib_drv.c
parent7c67bbddb53c364086f66260701bc54a61c9659c (diff)
parent040bdce67f88d833bfb59adae130a4ffb4c180f0 (diff)
downloadotp-44a83c8860bbd00878c720a7b9d940b4630bab8a.tar.gz
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Merge tag 'OTP-20.0' into sverker/20/binary_to_atom-utf8-crash/ERL-474/OTP-14590
Diffstat (limited to 'erts/emulator/drivers/common/zlib_drv.c')
-rw-r--r--erts/emulator/drivers/common/zlib_drv.c88
1 files changed, 72 insertions, 16 deletions
diff --git a/erts/emulator/drivers/common/zlib_drv.c b/erts/emulator/drivers/common/zlib_drv.c
index 440ba956d8..e342e414b5 100644
--- a/erts/emulator/drivers/common/zlib_drv.c
+++ b/erts/emulator/drivers/common/zlib_drv.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2003-2016. All Rights Reserved.
+ * Copyright Ericsson AB 2003-2017. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -44,30 +44,34 @@
#define INFLATE_INIT 8
#define INFLATE_INIT2 9
#define INFLATE_SETDICT 10
-#define INFLATE_SYNC 11
-#define INFLATE_RESET 12
-#define INFLATE_END 13
-#define INFLATE 14
+#define INFLATE_GETDICT 11
+#define INFLATE_SYNC 12
+#define INFLATE_RESET 13
+#define INFLATE_END 14
+#define INFLATE 15
-#define CRC32_0 15
-#define CRC32_1 16
-#define CRC32_2 17
+#define CRC32_0 16
+#define CRC32_1 17
+#define CRC32_2 18
-#define SET_BUFSZ 18
-#define GET_BUFSZ 19
-#define GET_QSIZE 20
+#define SET_BUFSZ 19
+#define GET_BUFSZ 20
+#define GET_QSIZE 21
-#define ADLER32_1 21
-#define ADLER32_2 22
+#define ADLER32_1 22
+#define ADLER32_2 23
-#define CRC32_COMBINE 23
-#define ADLER32_COMBINE 24
+#define CRC32_COMBINE 24
+#define ADLER32_COMBINE 25
-#define INFLATE_CHUNK 25
+#define INFLATE_CHUNK 26
#define DEFAULT_BUFSZ 4000
+/* According to zlib documentation, it can never exceed this */
+#define INFL_DICT_SZ 32768
+
/* This flag is used in the same places, where zlib return codes
* (Z_OK, Z_STREAM_END, Z_NEED_DICT) are. So, we need to set it to
* relatively large value to avoid possible value clashes in future.
@@ -248,6 +252,23 @@ static int zlib_output(ZLibData* d)
return zlib_output_init(d);
}
+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);
+ if ((res == Z_OK) && (driver_output_binary(d->port, NULL, 0, dbin, 0, dlen) < 0)) {
+ res = Z_ERRNO;
+ }
+ 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)
{
int res = Z_OK;
@@ -430,10 +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)
{
@@ -586,6 +632,16 @@ static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *bu
res = inflateSetDictionary(&d->s, (unsigned char*)buf, len);
return zlib_return(res, rbuf, rlen);
+ case INFLATE_GETDICT:
+ 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);
+
case INFLATE_SYNC:
if (d->state != ST_INFLATE) goto badarg;
if (len != 0) goto badarg;