Commit 52de625df991126899d7f547e669a949bb85e923 | zig

author	Koakuma <koachan@protonmail.com> 2020-12-04 03:47:06+07:00
committer	Andrew Kelley <andrew@ziglang.org> 2020-12-03 13:47:31-07:00
log	52de625df991126899d7f547e669a949bb85e923
tree	647ff1c27ec36bdc6788e86b7aa925d8f5287840
parent	cdde9d8885c887783bd1999281063cd202a648cb

Fix floating point parsing on BE systems (#7256)

* Fix floating point parsing on BE systems

* Load the appropriate endian.h files for macOS and BSD

* Add endian definition for Windows and extra check for ldshape selection

* Fix endian macro definition for macOS

Apparently their macros are defined without a leading __.

* Define new macro for endian checking purposes

This is gross and I really do not like the lack of standardization
around this part, but what can I do?

1 files changed, 25 insertions(+), 3 deletions(-)

src
- stage1
  - parse_f128.c

src/stage1/parse_f128.c+25-3

...	...	@@ -10,6 +10,28 @@
10	10	#include <string.h>
11	11	#include <math.h>
12	12
	13	// Every OSes seem to define endianness macros in different files.
	14	#if defined(__APPLE__)
	15	#include <machine/endian.h>
	16	#define ZIG_BIG_ENDIAN BIG_ENDIAN
	17	#define ZIG_LITTLE_ENDIAN LITTLE_ENDIAN
	18	#define ZIG_BYTE_ORDER BYTE_ORDER
	19	#elif defined(__DragonFly__) \|\| defined(__FreeBSD__) \|\| defined(__NetBSD__) \|\| defined(__OpenBSD__)
	20	#include <sys/endian.h>
	21	#define ZIG_BIG_ENDIAN _BIG_ENDIAN
	22	#define ZIG_LITTLE_ENDIAN _LITTLE_ENDIAN
	23	#define ZIG_BYTE_ORDER _BYTE_ORDER
	24	#elif defined(_WIN32) \|\| defined(_WIN64)
	25	// Assume that Windows installations are always little endian.
	26	#define ZIG_LITTLE_ENDIAN 1
	27	#define ZIG_BYTE_ORDER ZIG_LITTLE_ENDIAN
	28	#else // Linux
	29	#include <endian.h>
	30	#define ZIG_BIG_ENDIAN __BIG_ENDIAN
	31	#define ZIG_LITTLE_ENDIAN __LITTLE_ENDIAN
	32	#define ZIG_BYTE_ORDER __BYTE_ORDER
	33	#endif
	34
13	35	#define shcnt(f) ((f)->shcnt + ((f)->rpos - (f)->buf))
14	36	#define shlim(f, lim) __shlim((f), (lim))
15	37	#define shgetc(f) (((f)->rpos != (f)->shend) ? *(f)->rpos++ : __shgetc(f))
...	...	@@ -47,8 +69,7 @@
47	69
48	70	#define DECIMAL_DIG 36
49	71
50
51		#if __BYTE_ORDER == __LITTLE_ENDIAN
	72	#if defined(ZIG_BYTE_ORDER) && ZIG_BYTE_ORDER == ZIG_LITTLE_ENDIAN
52	73	union ldshape {
53	74	float128_t f;
54	75	struct {
...	...	@@ -62,7 +83,7 @@ union ldshape {
62	83	uint64_t hi;
63	84	} i2;
64	85	};
65		#elif __BYTE_ORDER == __BIG_ENDIAN
	86	#elif defined(ZIG_BYTE_ORDER) && ZIG_BYTE_ORDER == ZIG_BIG_ENDIAN
66	87	union ldshape {
67	88	float128_t f;
68	89	struct {
...	...	@@ -76,6 +97,7 @@ union ldshape {
76	97	uint64_t lo;
77	98	} i2;
78	99	};
	100	#else
79	101	#error Unsupported endian
80	102	#endif
81	103