将16进制文本转换为ascii码的C语言代码

我用的将16进制文本转换为ascii码的C语言代码。16进制文本复制到文件test.txt中，运行程序，将得到输入。

 

例：

运行：./CSTRING test.txt

 

其中，test.txt文件内容为：

30:31:32

 

则得到的"Cstring.txt"输入文件中

 012

 

本程序能自动跳过0个或多个分隔符（分隔符可以为任意的符号，如“：”，“%”或空格等，判断的函数实现见SkipDelimiter函数）。

如：输入文件内容为：

30     31            32

或

303132

得到的都是

012

 

#include <stdio.h>#include <unistd.h>#include <string.h>#include <sys/types.h>#include <sys/stat.h>#include <libgen.h>#include <fcntl.h>#include <stdlib.h>typedef unsigned char uint8;uint8 ConverseOneChar(uint8 ucChar){uint8 ucTmp = 0x00;printf("one ucChar= 0x%x\n", (char)ucChar);switch(ucChar){case '0':ucTmp = 0x00;break;case '1':ucTmp = 0x01;break;case '2':ucTmp = 0x02;break;case '3':ucTmp = 0x03;break;case '4':ucTmp = 0x04;break;case '5':ucTmp = 0x05;break;case '6':ucTmp = 0x06;break;case '7':ucTmp = 0x07;break;case '8':ucTmp = 0x08;break;case '9':ucTmp = 0x09;break;case 'a':case 'A':ucTmp = 0x0a;break;case 'b':case 'B':ucTmp = 0x0b;break;case 'c':case 'C':ucTmp = 0x0c;break;case 'd':case 'D':ucTmp = 0x0d;break;case 'e':case 'E':ucTmp = 0x0e;break;case 'f':case 'F':ucTmp = 0x0f;break;default:printf("err char!\n");return -1;}return ucTmp;}uint8 GetOneChar(uint8 *pucBuf){uint8 ucChar = 0x00;if(NULL == pucBuf){printf("para is NULL!\n");return -1;}ucChar = ConverseOneChar(pucBuf[0]);printf("first ucChar= 0x%x\n", (char)ucChar);ucChar <<= 4;ucChar |= ConverseOneChar(pucBuf[1]);printf("second ucChar= %c[0x%x]\n", (char)ucChar, ucChar);return ucChar;}int SkipDelimiter(uint8 *pcBuf){    int n = 0;    char *pcBufTmp = (char *)pcBuf;        for(n = 0; (pcBufTmp[n] != '\0') && (pcBufTmp[n] != '\n') && (pcBufTmp[n] != '\r'); n++)    {        if ((pcBufTmp[n] == '0')            || (pcBufTmp[n] == '1')            || (pcBufTmp[n] == '2')            || (pcBufTmp[n] == '3')            || (pcBufTmp[n] == '4')            || (pcBufTmp[n] == '5')            || (pcBufTmp[n] == '6')            || (pcBufTmp[n] == '7')            || (pcBufTmp[n] == '8')            || (pcBufTmp[n] == '9')            || (pcBufTmp[n] == 'A') || (pcBufTmp[n] == 'a')            || (pcBufTmp[n] == 'B') || (pcBufTmp[n] == 'b')            || (pcBufTmp[n] == 'C') || (pcBufTmp[n] == 'c')            || (pcBufTmp[n] == 'D') || (pcBufTmp[n] == 'd')            || (pcBufTmp[n] == 'E') || (pcBufTmp[n] == 'e')            || (pcBufTmp[n] == 'F') || (pcBufTmp[n] == 'f'))        {            break;        }    }    return n;}int ParseHexString(unsigned char *pucSrcBuf, int iSrcFileLen, unsigned char *pucDstBuf){uint8 *pucSrcTmp = NULL;uint8 *pucDstTmp = NULL;uint8 ucTmp = 0;int iFileLenRemain = iSrcFileLen;int iDelimiterNum = 0;int n = 0;if((NULL == pucSrcBuf)||(NULL == pucSrcBuf)){printf("para 1 or 2 is NULL!\n");return -1;}pucSrcTmp = pucSrcBuf;pucDstTmp = pucDstBuf;while(iFileLenRemain != 0){ucTmp = GetOneChar(pucSrcTmp);printf("ucTmp = %c\n", (char)ucTmp);pucDstTmp[n++] = ucTmp;pucSrcTmp += 2;        iDelimiterNum = SkipDelimiter(pucSrcTmp);        printf("iDelimiterNum=%d\n", iDelimiterNum);pucSrcTmp += iDelimiterNum;iFileLenRemain -= 2 + iDelimiterNum;}return n;}int main(int argc, char **argv){int iRet = 0;char *pcFileForChange = NULL;int iSrcFd = 0;int iDstFd = 0;int iSrcFileLen = 0;int n = 0;unsigned char *pucSrcBuf = NULL;unsigned char *pucDstBuf = NULL;if(argc != 2){printf("you need input the filename to change!\n");return -1;}pcFileForChange = argv[1];printf("filename:%s\n", pcFileForChange);iSrcFd = open(pcFileForChange, O_RDONLY);if (iSrcFd < 0){printf("open file:[%s] faild!\n", pcFileForChange);return -1;}iDstFd = open("Cstring.txt", O_RDWR | O_CREAT | O_TRUNC, 0644);if (iDstFd < 0){printf("open change filename file faild!\n");return -1;}iSrcFileLen = lseek(iSrcFd, 0, SEEK_END);printf("FileLen:%d\n", iSrcFileLen);lseek(iSrcFd, 0, SEEK_SET);pucSrcBuf = malloc(iSrcFileLen + 1024);pucDstBuf = malloc(iSrcFileLen);memset(pucSrcBuf, 0, iSrcFileLen);memset(pucDstBuf, 0, iSrcFileLen);iRet = read(iSrcFd, pucSrcBuf, iSrcFileLen);if(iRet != iSrcFileLen){printf("read err, read len = %d\n", iRet);return -1;}printf("read:%s\n", pucSrcBuf);n = ParseHexString(pucSrcBuf, iSrcFileLen, pucDstBuf);printf("write:\n%s\n", pucDstBuf);iRet = write(iDstFd, pucDstBuf, n);if(iRet != n){printf("write err, write len = %d\n", iRet);return -1;}close(iSrcFd);close(iDstFd);return 0;}