C语言实现Split函数

标签：split   c语言   vb split   字符串分割   

借助C语言的动态内存分配，实现类似VB中Split函数的效果。

函数介绍:

功能：按一个字符来拆分字符串

参数  src:要拆分的字符串
参数  delim:按照这个字符来拆分字符串
参数  istr:借助这个结构体来返回给调用者拆分后的字符串数组和字符串的个数
返回拆分是否成功

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct {
    char **str;     //the PChar of string array
    size_t num;     //the number of string
}IString;


/** \Split string by a char
 *
 * \param  src:the string that you want to split
 * \param  delim:split string by this char
 * \param  istr:a srtuct to save string-array's PChar and string's amount.
 * \return  whether or not to split string successfully
 *
 */
int Split(char *src, char *delim, IString* istr)//split buf
{
    int i;
    char *str = NULL, *p = NULL;
    char **data;

    (*istr).num = 1;
	str = (char*)calloc(strlen(src)+1,sizeof(char));
	if (str == NULL) return 0;
    data = (char**)calloc(1,sizeof(char *));
    if (data == NULL) return 0;
    str = src;

	data[0] = strtok(str, delim);
	for(i=1; p = strtok(NULL, delim); i++)
    {
        (*istr).num++;
        data = (char**)realloc(data,(i+1)*sizeof(char *));
        if (data == NULL) return 0;
        data[i] = p;
    }
    (*istr).str = data;

    free(str);
    free(p);
    //free(data);       //You must to free it in the caller of function
    str = p = NULL;

    return 1;
}

int main()
{
    int i;
    char s[]="data0|data1|data2|data3|data4|data5|data6|data7|data8";
    IString istr;

    if (  Split(s,"|",&istr) )
    {
        for (i=0;i<istr.num;i++)
            printf("%s\n",istr.str[i]);
        free(istr.str);     //when you don't ues it,you must to free memory.
    }
    else
        printf("memory allocation failure!\n");


    system("pause");
    return 0;
}

运行结果：

data0
data1
data2
data3
data4
data5
data6
data7
data8

C语言实现Split函数

标签：split   c语言   vb split   字符串分割   

原文地址：http://blog.csdn.net/lell3538/article/details/48011135