diff options
Diffstat (limited to 'lib/lz4frame.c')
| -rw-r--r-- | lib/lz4frame.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/lz4frame.c b/lib/lz4frame.c index a946f29..f5b62dc 100644 --- a/lib/lz4frame.c +++ b/lib/lz4frame.c @@ -67,6 +67,12 @@ You can contact the author at : /*-************************************ +* Common Utils +**************************************/ +#define LZ4_STATIC_ASSERT(c) { enum { LZ4_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ + + +/*-************************************ * Basic Types **************************************/ #if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) ) @@ -195,7 +201,11 @@ const char* LZ4F_getErrorName(LZ4F_errorCode_t code) return codeError; } -static LZ4F_errorCode_t err0r(LZ4F_errorCodes code) { return (LZ4F_errorCode_t)-(ptrdiff_t)code; } +static LZ4F_errorCode_t err0r(LZ4F_errorCodes code) +{ + LZ4_STATIC_ASSERT(sizeof(ptrdiff_t) >= sizeof(size_t)); /* A compilation error here means sizeof(ptrdiff_t) is not large enough */ + return (LZ4F_errorCode_t)-(ptrdiff_t)code; +} unsigned LZ4F_getVersion(void) { return LZ4F_VERSION; } |