convert.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//#define  ""


void usage(FILE *out, char *program)
{
    fprintf(out, "usage: %s [0x code]\n",program );
}

int convert(char *xcode)
{
    // check if xcode is 2*x
    if(strlen(xcode)%2 != 0)
    {
        printf("error: not invaild 16 bin code! check it and try again.\n");
        //exit(-1);
        return -1;
    }
    printf("------------------------\n");
    //info(xcode);
    convert_s(xcode);
    printf("\n------------------------\n");

    //printf("%s\n", zh_str);
    return 0;
}

int convert_s(char *str)
{
    char *buf = malloc(sizeof(char)*2);
    int i;
    for(;*str;str+=2)
    {	i = strtol(strncpy(buf, str, 2), NULL, 16);
        //i = atoi(strncpy(buf, str, 2));
        printf("%c", i);
    }
    free(buf);
    return 0;
}

int info(char *str)
{
    printf("str: %s\t sizeof(str):%d\tlen:%d\n", str, sizeof(str), strlen(str));
    // compare
    strcpy(str, "ÖÐÎIJâÊÔ");
    printf("str: %s\t sizeof(str):%d\tlen:%d\n", str, sizeof(str), strlen(str));
    char *tmp = str;
    int len = strlen(str);
    while(*str)
        printf("%0l", *str++);
    str = str - len; //strlen(str);
    printf("~~~~~%s~~~~%s~~\n", str, tmp);
    while(*tmp)
        printf("%l", *tmp++);
    printf("-------------\n");
    return 0;
}
//int convert_r(char *str)

int main(int argc, char **argv)
{
    switch(argc)
    {
        case 1:
            usage(stdout, argv[0]);
            break;
        case 2:
            convert(argv[1]);
            break;
        default:
            usage(stderr, argv[0]);
    }
    return 0;
}