gcc（windows + MinGW）是否在inttypes.h中定义了SCNd8，SCNu8？ [英] Does gcc(windows + MinGW) defines SCNd8, SCNu8 in inttypes.h?

问题描述

  #include< stdio.h> 
 #include< inttypes.h> 
 
 int main（void）
 {
 int8_t int8; 
 int16_t int16; 
 int32_t int32; 
 int64_t int64; 
 
 uint8_t uint8; 
 uint16_t uint16; 
 uint32_t uint32; 
 uint64_t uint64; 
 
 scanf（％SCNd8％SCNd16％SCNd32％SCNd64％SCNu8％SCNu16％SCNu32％SCNu64，
& int8 ，& int16，& int32，& int64，& uint8，& uint16，& uint32，& uint64）; 
 
 printf（％PRId8\\\
％PRId16\\\
％PRId32\\\
％PRId64\\\
％PRIu8\\\
％PRIu16 \ n％PRIu32\\\
％PRIu64\ n，
 int8，int16，int32，int64，uint8，uint16，uint32，uint64）; 
 
返回0; 
} 
  

我无法使用最新的gcc + MinGW + Netbeans + Windows编译此代码。 Netbeans说无法解析标识符SCNd8和SCNu8。虽然 http：//linux.die我在gcc手册页上找不到SCNd8和SCNu8的任何参考.net / include / inttypes.h 定义它们。我没有收到使用PRId8或PRIu8的语法错误。

MinGW inttypes.h（缺少SCNd8和SCNu8）（示例代码）

  #define PRIXFAST64I64X
 
 #define PRIXMAXI64X
 #define PRIXPTRX
 $ b $ * / $ 
 * fscanf宏对于带符号的int类型
 *注意：如果32位int用于int_fast8_t和int_fast16_t 
 *（参见stdint.h，7.18.1.3），则FAST8和FAST16应该有
 * no长度标识符
 * / 
 
 #define SCNd16hd
 #define SCNd32d
 #define SCNd64I64d
 
＃定义SCNdLEAST16hd
 #define SCNdLEAST32d
 #define SCNdLEAST64I64d
 
 #define SCNdFAST16hd
  

解决方案

您可以在 #include< inttypes.h> code $：b
$ b

  #ifndef SCNd8 
 #define SCNd8hhd
 #endif 
 #ifndef SCNu8 
 #define SCNu8hhu
 #endif 
  

哪个应该适合大多数platfo rc。



澄清：
其中大多数平台是指符合C99的平台 fscanf / scanf 可以处理 char 的 hh 前缀，不只是 h 前缀短。

#include <stdio.h>
#include <inttypes.h>

int main(void)
{
    int8_t int8;
    int16_t int16;
    int32_t int32;
    int64_t int64;

    uint8_t uint8;
    uint16_t uint16;
    uint32_t uint32;
    uint64_t uint64;

    scanf("%"SCNd8"%"SCNd16"%"SCNd32"%"SCNd64"%"SCNu8"%"SCNu16"%"SCNu32"%"SCNu64, 
            &int8, &int16, &int32, &int64, &uint8, &uint16, &uint32, &uint64);

    printf("%"PRId8"\n%"PRId16"\n%"PRId32"\n%"PRId64"\n%"PRIu8"\n%"PRIu16"\n%"PRIu32"\n%"PRIu64"\n",
            int8, int16, int32, int64, uint8, uint16, uint32, uint64);

    return 0;
}

I can't compile this code using latest gcc + MinGW + Netbeans + Windows. Netbeans says "unable to resolve identifier SCNd8 and SCNu8". I can't find any reference for SCNd8 and SCNu8 on gcc man page although http://linux.die.net/include/inttypes.h defines them. I don't receive syntax error for using PRId8 or PRIu8.

MinGW inttypes.h (lacks SCNd8 and SCNu8 ) (sample code)

#define PRIXFAST64 "I64X"

#define PRIXMAX "I64X"
#define PRIXPTR "X"

/*
 *   fscanf macros for signed int types
 *   NOTE: if 32-bit int is used for int_fast8_t and int_fast16_t
 *   (see stdint.h, 7.18.1.3), FAST8 and FAST16 should have
 *   no length identifiers
 */

#define SCNd16 "hd"
#define SCNd32 "d"
#define SCNd64 "I64d"

#define SCNdLEAST16 "hd"
#define SCNdLEAST32 "d"
#define SCNdLEAST64 "I64d"

#define SCNdFAST16 "hd"    

解决方案

You could add the following after #include <inttypes.h>:

#ifndef SCNd8
  #define SCNd8 "hhd"
#endif
#ifndef SCNu8
  #define SCNu8 "hhu"
#endif

Which should be appropriate for most platforms.

Clarification: Where "most platforms" refers to platforms with a C99-compliant fscanf/scanf that can handle the hh prefix for char, not just the h prefix for short.

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