文件中子字符串的查找（区分大小写）

#define _GNU_SOURCE    //forstrcasestr()
#include <stdio.h>
#include <string.h>

#define V_MAX_LINE_LEN    1024
#define V_MAX_SUBSTR_LEN  80
#define V_ARGC_CNT        9

int Parse_Option(int opt_num, char *opt_list[]);
int Find_SubString(char *opt_list[]);

int main(int argc, char *argv[])
{
        int ret = 0;
        ret = Parse_Option(argc,argv);
        if(ret == -1)
        {
                return -1;
        }
        ret = Find_SubString(argv);
        return ret;
}

/********************************************************************************
* Name          Parse_Option
* Function      judge of functionsparameter
* Prototype     int  Parse_Option(int opt_num, char*opt_list[])
* Parameter     argv(i)
* Return Value  0:  normal end
*               -1:  abnormal end
* [Create]      caojian                Date:  2018/01/12(init)
********************************************************************************/

int Parse_Option(int opt_num, char *opt_list[])
{
        //judge the parameter number
        if(opt_num != V_ARGC_CNT)
    {
                goto lb_error;
    }

        if(strcmp(opt_list[1],"-infile") != 0)
        {
                printf("error:-infile*.txt!\n");
                goto lb_error;
        }

        if(strcmp(opt_list[3],"-outfile") != 0)
        {
                printf("error:-outfile*.txt!\n");
                goto lb_error;
        }

        if(strcmp(opt_list[5],"-findstr") != 0)
        {
                printf("error:-findstrstring!\n");
                goto lb_error;
        }

        //judge the sizeof string
    if(strlen(opt_list[6]) >V_MAX_SUBSTR_LEN)
    {
        printf("the string is toolong(size<= 80)!");
                goto lb_error;
    }

        if(strcmp(opt_list[7],"-case") != 0)
        {
                printf("error:-caseY/N!\n");
                goto lb_error;
        }
       
        if((strcmp(opt_list[8],"Y") != 0) && (strcmp(opt_list[8], "N") !=0))
        {
                printf("error:inputN/Y!\n");
                goto lb_error;
        }
        return 0;

lb_error:
        printf("Usage: %s -infile*.txt -outfile *.txt -findstr *** -case Y/N\n", opt_list[0]);
        return -1;
}

/********************************************************************************
* Name          Find_SubString
* Function      search the string in theinfile,and count the sum number,in the line,in the row,and result in theoutfile.
* Prototype     int Find_SubString(char*opt_list)
* Parameter     argv(i)
* Return Value  0:  normal end
*               -1:  abnormal end
* [Create]      caojian                Date:   2018/01/12(init)
********************************************************************************/

int Find_SubString(char *opt_list[])
{
        int line_idx = 0;
        int row_idx = 0;
        int total_find_cnt = 0;
        int case_flg = 0;
        int substr_len = 0;
       
        charline_buf[V_MAX_LINE_LEN];
        char *arr1_ptr = NULL;
        char *arr2_ptr = NULL;
         
        FILE *infile_ptr = NULL;
        FILE *outfile_ptr = NULL;

        memset(line_buf, 0,sizeof(line_buf));
       
        if((infile_ptr =fopen(opt_list[2], "r")) == 0)
        {
                perror("open infilefailed");
                return -1;
        }

        if((outfile_ptr =fopen(opt_list[4], "w")) == 0)
        {
                perror("open outfilefailed");
                return -1;
        }
       
        substr_len =strlen(opt_list[6]);
        while(fgets(line_buf,V_MAX_LINE_LEN, infile_ptr))
        {
                //get one line from inputfile
                line_idx++;
               
                arr1_ptr = line_buf;
                arr2_ptr = line_buf;                   

                while(1)
                {
                        if((strcmp(opt_list[8],"N")) == 0)
                        {
                                arr1_ptr =strcasestr(arr1_ptr, opt_list[6]);
                        }
               
                        if((strcmp(opt_list[8],"Y")) == 0)
                        {
                                arr1_ptr =strstr(arr1_ptr, opt_list[6]);
                        }
                                               
                        row_idx = arr1_ptr- arr2_ptr +1;
                        total_find_cnt++;
                        fprintf(outfile_ptr,"%d / %d :%s\n", line_idx, row_idx, line_buf);
                        arr1_ptr +=substr_len;
                }
        }
       
        fprintf(outfile_ptr, "thetotal number: %d\n", total_find_cnt);
       
        //close all file
        fclose(infile_ptr);
        fclose(outfile_ptr);
}