diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2017-09-01 13:52:53 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2017-09-01 13:52:53 -0400 |
| commit | b79d69b087561eb6687373031a5098b0694f9ec6 (patch) | |
| tree | 828e33ad5e008e747fe08ba2a89bb11e7d312b38 /src/include/c.h | |
| parent | 84be67181aab22ea8723ba0625ee690223cd8785 (diff) | |
| download | postgresql-b79d69b087561eb6687373031a5098b0694f9ec6.tar.gz | |
Ensure SIZE_MAX can be used throughout our code.
Pre-C99 platforms may lack <stdint.h> and thereby SIZE_MAX. We have
a couple of places using the hack "(size_t) -1" as a fallback, but
it wasn't universally available; which means the code added in commit
2e70d6b5e fails to compile everywhere. Move that hack to c.h so that
we can rely on having SIZE_MAX everywhere.
Per discussion, it'd be a good idea to make the macro's value safe
for use in #if-tests, but that will take a bit more work. This is
just a quick expedient to get the buildfarm green again.
Back-patch to all supported branches, like the previous commit.
Discussion: https://postgr.es/m/15883.1504278595@sss.pgh.pa.us
Diffstat (limited to 'src/include/c.h')
| -rw-r--r-- | src/include/c.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/c.h b/src/include/c.h index af799dc1df..4f8bbfcd62 100644 --- a/src/include/c.h +++ b/src/include/c.h @@ -343,6 +343,11 @@ typedef unsigned PG_INT128_TYPE uint128; #define PG_INT64_MAX INT64CONST(0x7FFFFFFFFFFFFFFF) #define PG_UINT64_MAX UINT64CONST(0xFFFFFFFFFFFFFFFF) +/* Max value of size_t might also be missing if we don't have stdint.h */ +#ifndef SIZE_MAX +#define SIZE_MAX ((size_t) -1) +#endif + /* * We now always use int64 timestamps, but keep this symbol defined for the * benefit of external code that might test it. |