C语言格式化输出64位地址汇总
Format Specification Fields: printf and wprintf FunctionsA format specification, which consists of optional and required fields, has the following form:%[flags] [width] [.precision] [{h | l | I64 | L}]type
Each field of the format specification is a single character or a number signifying a particular format option. The simplest format specification contains only the percent sign and a type character (for example, %s). If a percent sign is followed by a character that has no meaning as a format field, the character is copied to stdout. For example, to print a percent-sign character, use %%.
The optional fields, which appear before the type character, control other aspects of the formatting, as follows:
typeRequired character that determines whether the associated argument is interpreted as a character, a string, or a number (see Table R.3).flagsOptional character or characters that control justification of output and printing of signs, blanks, decimal points, and octal and hexadecimal prefixes (see Table R.4). More than one flag can appear in a format specification.widthOptional number that specifies the minimum number of characters output. (See printf Width Specification.) precisionOptional number that specifies the maximum number of characters printed for all or part of the output field, or the minimum number of digits printed for integer values (see Table R.5).h | l | I64 | LOptional prefixes to type-that specify the size of argument (see Table R.6).---------------------------------------------------------上面是m$手册上的用法, 我一般也都是按手册上的来用,如下:
printf("0x%016I64X", xx);
在写64位调试器时, 为了方便查看地址位数,我会在地址中间也就是2^32的位置用 "_" 下划线隔开, 如下:
printf("%08X_%08X", (DWORD)(xx >> 32), (DWORD)(xx & 0xffffffff));
// 或者
printf("%08X_%08X", (DWORD)(xx >> 32), (DWORD)(xx));
今天在 Zydis开源项目中看到了下面这种用法: (没错,我准备弃用capstone换zydis了)
printf("%016"PRIX64"", xx);
网上查了下
这是一种跨平台的书写方式，主要是为了同时支持32位和64位操作系统。PRId64表示64位整数，在32位系统中表示long long int，在64位系统中表示long int。相当于：
printf("%" "ld" "\n", value);//64bit OS
printf("%" "lld" "\n", value);//32bit OS
// 或者
printf("%ld", value); // 64bit OS
printf("%lld", value); // 32bit OS
使用前需要包含头文件
#include <inttypes.h>
之前没见过, 感觉挺新颖的, 记录下.
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