Sword pcre库使用

Posted 2021-01-09 zhanggaofeng

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

#include "regularhelper.h"
#include "pcre/pcre.h"
#include "stringhelper.h"

int regularLoop(pcre *re, char *pcSrc, size_t ovecCount, void *userData, FuncHandle callback);

/********************************************************
   Func Name: regularInfer
Date Created: 2018-9-29
 Description: pcre识别
       Input: 
      Output: error code
     Caution: 
*********************************************************/
int regularInfer(char *pcSrc, const char *pattern, void *userData, FuncHandle callback)
{
    int result = 0;
    pcre *re = NULL;
    int erroffset;
    const char *pcError = NULL;
    size_t ovecCount = 0;

    if (NULL == pcSrc || NULL == pattern || NULL == userData ||NULL == callback)
    {
        return -1;
    }

    /*
    子串的个数就是正则表达式中()的个数
    */
    //计算子串的个数
    ovecCount = matchOperator(pattern, ‘(‘, ‘)‘) + 1;
    
    //编译正则表达式的pcre内部表示结构
    re = pcre_compile(pattern, 0, &pcError, &erroffset, NULL);
    if (NULL == re)
    {
        return -1;
    }

    //匹配字符串
    result = regularLoop(re, pcSrc, ovecCount, userData, callback);

    //清理资源
    pcre_free(re);

    return result;
}

/********************************************************
   Func Name: regularLoop
Date Created: 2018-9-29
 Description: 循环识别字符串
       Input: 
      Output: error code
     Caution: 
*********************************************************/
int regularLoop(pcre *re, char *pcSrc, size_t ovecCount, void *userData, FuncHandle callback)
{
    int rc  = 0;
    int *offsetVector = NULL;
    int offset = 0;
    int ovecSize = 0;
    int match = 0;
    
    //分配内存空间
    //ovecSize should be a multiple of 3
    ovecSize = ovecCount * 3;
    offsetVector = (int *)malloc(ovecSize * sizeof(int));
    if (NULL == offsetVector)
    {
        return -1;
    }
    memset(offsetVector, 0, ovecSize * sizeof(int));

    while (1)
    {
        //匹配正则表达式
        ////offset为偏移量，为了循环匹配
        rc = pcre_exec(re, NULL, pcSrc, strlen(pcSrc), offset, 0, offsetVector, ovecSize);
        if (rc <= 0)
        {
            break;
        }
        //用户自处理
        callback(pcSrc, offsetVector, rc, userData);
        //偏移量赋值
        offset = offsetVector[1];
        match++;
    }

    return match > 0 ? 0 : -1;

}

#ifdef TEST

#include "regularhelper.h"

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

void deal(char *pcData, int *regVector, size_t size, void *userArg)
{
    char gcData[1024] = { 0 };
    int i = 0;

    for (i = 1; i < size; i++)
    {
        //regVector[2 * i]表示开始位置
        //regVector[2 * i + 1] 表示结束位置
        strncpy(gcData, pcData + regVector[2 * i], regVector[2 * i + 1] - regVector[2 * i]);
        printf("key is %s
", gcData);
    }
    printf("
", gcData);
}

void test()
{
    char *p = NULL;
    //char str[] = "http://1.203.80.138:8001/tts?user_id=speech&domain=1&language=zh&audiotype=6&rate=1&speed=5&text=asr error goodbye";
    char str[] = "tabceftsfasdft12345t";
    int result = 0;
    
    //memset(&data, 0, sizeof(STParamList));
    int data;

    //提取所有的参数
    result = regularInfer(str, "t(.)(.)(.)(.)(.)t", &data, deal);
    if (result)
    {
        printf("regularInfer() error .
");
    }
}

int main(int argc,char * argv[])
{
    test();
    return 0;
}

#endif