bpo-30947: Update libexpat from 2.2.1 to 2.2.3 (#3106)
* bpo-30947: Update libexpat from 2.2.1 to 2.2.3
* Add NEWS entry
* Add new loadlibrary.c
* expat_external.h: restore include "pyexpatns.h"
* PCbuild: add expat/loadlibrary.c
* Define XML_POOR_ENTROPY to compile expat
diff --git a/Modules/expat/siphash.h b/Modules/expat/siphash.h
index 453dd42..581872d 100644
--- a/Modules/expat/siphash.h
+++ b/Modules/expat/siphash.h
@@ -2,9 +2,8 @@
* siphash.h - SipHash-2-4 in a single header file
* --------------------------------------------------------------------------
* Derived by William Ahern from the reference implementation[1] published[2]
- * by Jean-Philippe Aumasson and Daniel J. Berstein. Licensed in kind.
* by Jean-Philippe Aumasson and Daniel J. Berstein.
- * Minimal changes by Sebastian Pipping on top, details below.
+ * Minimal changes by Sebastian Pipping and Victor Stinner on top, see below.
* Licensed under the CC0 Public Domain Dedication license.
*
* 1. https://www.131002.net/siphash/siphash24.c
@@ -12,14 +11,25 @@
* --------------------------------------------------------------------------
* HISTORY:
*
- * 2017-06-10 (Sebastian Pipping)
+ * 2017-07-25 (Vadim Zeitlin)
+ * - Fix use of SIPHASH_MAIN macro
+ *
+ * 2017-07-05 (Sebastian Pipping)
+ * - Use _SIP_ULL macro to not require a C++11 compiler if compiled as C++
+ * - Add const qualifiers at two places
+ * - Ensure <=80 characters line length (assuming tab width 4)
+ *
+ * 2017-06-23 (Victor Stinner)
+ * - Address Win64 compile warnings
+ *
+ * 2017-06-18 (Sebastian Pipping)
* - Clarify license note in the header
* - Address C89 issues:
* - Stop using inline keyword (and let compiler decide)
- * - Turn integer suffix ULL to UL
* - Replace _Bool by int
* - Turn macro siphash24 into a function
* - Address invalid conversion (void pointer) by explicit cast
+ * - Address lack of stdint.h for Visual Studio 2003 to 2008
* - Always expose sip24_valid (for self-tests)
*
* 2012-11-04 - Born. (William Ahern)
@@ -76,7 +86,23 @@
#define SIPHASH_H
#include <stddef.h> /* size_t */
-#include <stdint.h> /* uint64_t uint32_t uint8_t */
+
+#if defined(_WIN32) && defined(_MSC_VER) && (_MSC_VER < 1600)
+ /* For vs2003/7.1 up to vs2008/9.0; _MSC_VER 1600 is vs2010/10.0 */
+ typedef unsigned __int8 uint8_t;
+ typedef unsigned __int32 uint32_t;
+ typedef unsigned __int64 uint64_t;
+#else
+ #include <stdint.h> /* uint64_t uint32_t uint8_t */
+#endif
+
+
+/*
+ * Workaround to not require a C++11 compiler for using ULL suffix
+ * if this code is included and compiled as C++; related GCC warning is:
+ * warning: use of C++11 long long integer constant [-Wlong-long]
+ */
+#define _SIP_ULL(high, low) (((uint64_t)high << 32) | low)
#define SIP_ROTL(x, b) (uint64_t)(((x) << (b)) | ( (x) >> (64 - (b))))
@@ -158,11 +184,12 @@
} /* sip_round() */
-static struct siphash *sip24_init(struct siphash *H, const struct sipkey *key) {
- H->v0 = 0x736f6d6570736575UL ^ key->k[0];
- H->v1 = 0x646f72616e646f6dUL ^ key->k[1];
- H->v2 = 0x6c7967656e657261UL ^ key->k[0];
- H->v3 = 0x7465646279746573UL ^ key->k[1];
+static struct siphash *sip24_init(struct siphash *H,
+ const struct sipkey *key) {
+ H->v0 = _SIP_ULL(0x736f6d65U, 0x70736575U) ^ key->k[0];
+ H->v1 = _SIP_ULL(0x646f7261U, 0x6e646f6dU) ^ key->k[1];
+ H->v2 = _SIP_ULL(0x6c796765U, 0x6e657261U) ^ key->k[0];
+ H->v3 = _SIP_ULL(0x74656462U, 0x79746573U) ^ key->k[1];
H->p = H->buf;
H->c = 0;
@@ -173,7 +200,8 @@
#define sip_endof(a) (&(a)[sizeof (a) / sizeof *(a)])
-static struct siphash *sip24_update(struct siphash *H, const void *src, size_t len) {
+static struct siphash *sip24_update(struct siphash *H, const void *src,
+ size_t len) {
const unsigned char *p = (const unsigned char *)src, *pe = p + len;
uint64_t m;
@@ -198,7 +226,7 @@
static uint64_t sip24_final(struct siphash *H) {
- char left = (char)(H->p - H->buf);
+ const char left = (char)(H->p - H->buf);
uint64_t b = (H->c + left) << 56;
switch (left) {
@@ -222,7 +250,8 @@
} /* sip24_final() */
-static uint64_t siphash24(const void *src, size_t len, const struct sipkey *key) {
+static uint64_t siphash24(const void *src, size_t len,
+ const struct sipkey *key) {
struct siphash state = SIPHASH_INITIALIZER;
return sip24_final(sip24_update(sip24_init(&state, key), src, len));
} /* siphash24() */
@@ -310,7 +339,8 @@
struct sipkey k;
size_t i;
- sip_tokey(&k, "\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017");
+ sip_tokey(&k, "\000\001\002\003\004\005\006\007\010\011"
+ "\012\013\014\015\016\017");
for (i = 0; i < sizeof in; ++i) {
in[i] = (unsigned char)i;
@@ -323,12 +353,12 @@
} /* sip24_valid() */
-#if SIPHASH_MAIN
+#ifdef SIPHASH_MAIN
#include <stdio.h>
int main(void) {
- int ok = sip24_valid();
+ const int ok = sip24_valid();
if (ok)
puts("OK");