c - 使用 C 样式转义序列转义二进制文件

Question

这个问题已经有答案了:

How can I convert a binary file to the text declaring a C/C++ array with that content? (9 个回答)

已关闭 7 年前。

我有一个小的二进制文件。我想将该二进制文件作为字符数组导入到 C 程序中，如下所示:

char some_binary_data[] = "\000-type or \xhh-type escape sequences and such here";

是否有一个标准的 shell 命令可以使用 C 风格转义来呈现二进制数据？如果我可以在八进制样式转义和十六进制样式转义之间进行选择，那就加分了。

例如，如果我的文件包含字节

0000000 117000 060777 000123
0000006

，我想将其渲染为 "\000\236\377a\123" .

Answer 1

这是我整理的应该有效的东西:

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>

int main(int argc, char *argv[])
{
    int infile = open(argv[1], O_RDONLY);
    if (infile == -1) {
        perror("open failed");
        exit(1);
    }

    FILE *outfile = fopen(argv[2],"w");
    if (!outfile) {
        perror("fopen failed");
        exit(1);
    }
    fprintf(outfile, "char %s[] = ", argv[3]);

    int buflen;
    int totallen, i, linelen;
    char buf[1000];
    totallen = 0;
    linelen = atoi(argv[4]);
    while ((buflen=read(infile, buf, sizeof(buf))) > 0) {
        for (i=0;i<buflen;i++) {
            if (totallen % linelen == 0) {
                fprintf(outfile, "\"");
            }
            if (buf[i] == '\"' || buf[i] == '\\') {
                fprintf(outfile,"\\%c",buf[i]);
            } else if (isalnum(buf[i]) || ispunct(buf[i]) || buf[i] == ' ') {
                fprintf(outfile,"%c",buf[i]);
            } else {
                fprintf(outfile,"\\x%02X",buf[i]);
            }
            if (totallen % linelen == linelen - 1) {
                fprintf(outfile, "\"\n    ");
            }
            totallen++;
        }
    }
    if (totallen % linelen != 0) {
        fprintf(outfile, "\"");
    }
    fprintf(outfile, ";\n");

    close(infile);
    fclose(outfile);
    return 0;
}

示例输入:

This is a "test".  This is only a \test.

称为:

/tmp/convert /tmp/test1 /tmp/test1.c test1 10

示例输出

char test1[] = "This is a "
    "\"test\".  Th"
    "is is only"
    "a \\test.\x0A"
    ;