From a225ffc1d79e6302970cd9ec364ac8d106d792a4 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Mon, 16 Oct 2017 14:39:56 -0700 Subject: [PATCH] Added min/max macros for the sized SDL datatypes --- include/SDL_stdinc.h | 16 ++++++++++++++++ test/testplatform.c | 20 ++++++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/include/SDL_stdinc.h b/include/SDL_stdinc.h index f7ac33a90..72402299f 100644 --- a/include/SDL_stdinc.h +++ b/include/SDL_stdinc.h @@ -146,35 +146,51 @@ typedef enum /** * \brief A signed 8-bit integer type. */ +#define SDL_MAX_SINT8 ((Sint8)0x7F) /* 127 */ +#define SDL_MIN_SINT8 ((Sint8)(~0x7F)) /* -128 */ typedef int8_t Sint8; /** * \brief An unsigned 8-bit integer type. */ +#define SDL_MAX_UINT8 ((Uint8)0xFF) /* 255 */ +#define SDL_MIN_UINT8 ((Uint8)0x00) /* 0 */ typedef uint8_t Uint8; /** * \brief A signed 16-bit integer type. */ +#define SDL_MAX_SINT16 ((Sint16)0x7FFF) /* 32767 */ +#define SDL_MIN_SINT16 ((Sint16)(~0x7FFF)) /* -32768 */ typedef int16_t Sint16; /** * \brief An unsigned 16-bit integer type. */ +#define SDL_MAX_UINT16 ((Uint16)0xFFFF) /* 65535 */ +#define SDL_MIN_UINT16 ((Uint16)0x0000) /* 0 */ typedef uint16_t Uint16; /** * \brief A signed 32-bit integer type. */ +#define SDL_MAX_SINT32 ((Sint32)0x7FFFFFFF) /* 2147483647 */ +#define SDL_MIN_SINT32 ((Sint32)(~0x7FFFFFFF)) /* -2147483648 */ typedef int32_t Sint32; /** * \brief An unsigned 32-bit integer type. */ +#define SDL_MAX_UINT32 ((Uint32)0xFFFFFFFFu) /* 4294967295 */ +#define SDL_MIN_UINT32 ((Uint32)0x00000000) /* 0 */ typedef uint32_t Uint32; /** * \brief A signed 64-bit integer type. */ +#define SDL_MAX_SINT64 ((Sint64)0x7FFFFFFFFFFFFFFFll) /* 9223372036854775807 */ +#define SDL_MIN_SINT64 ((Sint64)(~0x7FFFFFFFFFFFFFFFll)) /* -9223372036854775808 */ typedef int64_t Sint64; /** * \brief An unsigned 64-bit integer type. */ +#define SDL_MAX_UINT64 ((Uint64)0xFFFFFFFFFFFFFFFFull) /* 18446744073709551615 */ +#define SDL_MIN_UINT64 ((Uint64)(0x0000000000000000ull)) /* 0 */ typedef uint64_t Uint64; /* @} *//* Basic data types */ diff --git a/test/testplatform.c b/test/testplatform.c index 001123b7d..0cba8fe76 100644 --- a/test/testplatform.c +++ b/test/testplatform.c @@ -30,6 +30,26 @@ TestTypes(SDL_bool verbose) { int error = 0; + SDL_COMPILE_TIME_ASSERT(SDL_MAX_SINT8, SDL_MAX_SINT8 == 127); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_SINT8, SDL_MIN_SINT8 == -128); + SDL_COMPILE_TIME_ASSERT(SDL_MAX_UINT8, SDL_MAX_UINT8 == 255); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_UINT8, SDL_MIN_UINT8 == 0); + + SDL_COMPILE_TIME_ASSERT(SDL_MAX_SINT16, SDL_MAX_SINT16 == 32767); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_SINT16, SDL_MIN_SINT16 == -32768); + SDL_COMPILE_TIME_ASSERT(SDL_MAX_UINT16, SDL_MAX_UINT16 == 65535); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_UINT16, SDL_MIN_UINT16 == 0); + + SDL_COMPILE_TIME_ASSERT(SDL_MAX_SINT32, SDL_MAX_SINT32 == 2147483647); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_SINT32, SDL_MIN_SINT32 == ~0x7fffffff); /* Instead of -2147483648, which is treated as unsigned by some compilers */ + SDL_COMPILE_TIME_ASSERT(SDL_MAX_UINT32, SDL_MAX_UINT32 == 4294967295u); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_UINT32, SDL_MIN_UINT32 == 0); + + SDL_COMPILE_TIME_ASSERT(SDL_MAX_SINT64, SDL_MAX_SINT64 == 9223372036854775807ll); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_SINT64, SDL_MIN_SINT64 == ~0x7fffffffffffffffll); /* Instead of -9223372036854775808, which is treated as unsigned by compilers */ + SDL_COMPILE_TIME_ASSERT(SDL_MAX_UINT64, SDL_MAX_UINT64 == 18446744073709551615ull); + SDL_COMPILE_TIME_ASSERT(SDL_MIN_UINT64, SDL_MIN_UINT64 == 0); + if (badsize(sizeof(Uint8), 1)) { if (verbose) SDL_Log("sizeof(Uint8) != 1, instead = %u\n",