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Added min/max macros for the sized SDL datatypes

This commit is contained in:
Sam Lantinga 2017-10-16 14:39:56 -07:00
parent 8e98bdaa6f
commit a225ffc1d7
2 changed files with 36 additions and 0 deletions
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16
include/SDL_stdinc.h
View File

@ -146,35 +146,51 @@ typedef enum
/** /**
* \brief A signed 8-bit integer type. * \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; typedef int8_t Sint8;
/** /**
* \brief An unsigned 8-bit integer type. * \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; typedef uint8_t Uint8;
/** /**
* \brief A signed 16-bit integer type. * \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; typedef int16_t Sint16;
/** /**
* \brief An unsigned 16-bit integer type. * \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; typedef uint16_t Uint16;
/** /**
* \brief A signed 32-bit integer type. * \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; typedef int32_t Sint32;
/** /**
* \brief An unsigned 32-bit integer type. * \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; typedef uint32_t Uint32;
/** /**
* \brief A signed 64-bit integer type. * \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; typedef int64_t Sint64;
/** /**
* \brief An unsigned 64-bit integer type. * \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; typedef uint64_t Uint64;
/* @} *//* Basic data types */ /* @} *//* Basic data types */

20
test/testplatform.c
View File

@ -30,6 +30,26 @@ TestTypes(SDL_bool verbose)
{ {
int error = 0; 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 (badsize(sizeof(Uint8), 1)) {
if (verbose) if (verbose)
SDL_Log("sizeof(Uint8) != 1, instead = %u\n", SDL_Log("sizeof(Uint8) != 1, instead = %u\n",