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#include <stdio.h> #ifdef _win32 typedef unsigned __int64 uint64_t; #else typedef unsigned long long uint64_t; #endif typedef unsigned int uint32_t; typedef unsigned short uint16_t; typedef unsigned char uint8_t; int main(int argc, char *argv[]) { uint32_t t321, t322, t323; uint64_t t641, t642, t643; uint8_t *p; uint8_t t[64] = { 0x4e, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x4e, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00 }; printf( "sizeof(uint64_t) = %d\n" "sizeof(uint32_t) = %d\n" , sizeof(uint64_t), sizeof(uint32_t)); p = t; t321 = *(uint32_t *)p; p = 6; t322 = *(uint32_t *)p; p = 6; t323 = *(uint32_t *)p; p = 6; printf("t321[%x].%d t322[%x].%d t323[%x].%d\n" , t321, t321, t322, t322, t323, t323); p = t; t641 = *(uint32_t *)p; p = 6; t642 = *(uint32_t *)p; p = 6; t643 = *(uint32_t *)p; p = 6; #ifdef _win32 printf("t641[%i64x].%i64d t642[%i64x].%i64d t643[%i64x].%i64d\n" , t641, t641, t642, t642, t643, t643); #else printf("t641[%llx].%lld t642[%llx].%lld t643[%llx].%lld\n" , t641, t641, t642, t642, t643, t643); #endif t641 = 0x1122334455667788; #ifdef _win32 printf("%i64x %i64d \n", t641, t641); #else printf("%llx %lld \n", t641, t641); #endif return 0; }

/*

test env:

    microsoft (r) 32-bit c/c   optimizing compiler version 12.00.8168 for 80x86

    microsoft windows 2000 [version 5.00.2195]



result:

    sizeof(uint64_t) = 8

    sizeof(uint32_t) = 4

    t321[7c4e].31822 t322[7c4e].31822 t323[4].4

    t641[7c4e].31822 t642[7c4e].31822 t643[4].4

    1122334455667788 1234605616436508552



--------------------------------------

test env:

    gcc version 3.2.3 20030502 (red hat linux 3.2.3-47.3)



result:

    sizeof(uint64_t) = 8

    sizeof(uint32_t) = 4

    t321[7c4e].31822 t322[7c4e].31822 t323[4].4

    t641[7c4e].31822 t642[7c4e].31822 t643[4].4

    1122334455667788 1234605616436508552

 */

在进行移植的时候可能用的上的：
#ifdef _win32
#  define apr_uint64_t_hex_fmt     "llx"
#else
#  define apr_uint64_t_hex_fmt     "i64x"
#endif

example:
     sprintf(buf, "%" apr_uint64_t_hex_fmt, var);

#define host_widest_int_print_dec       "%i64d" 
#define host_widest_int_print_unsigned  "%i64u" 
#define host_widest_int_print_hex       "0x%i64x"

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给主人留下些什么吧！~~

2008-07-21 13:10:54

thanks for your sharing!

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