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POFile I/O in C language
 

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  1. POFile I/O in C language
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    <p>I am facing a problem with the function below. I am trying to get data from one location and then search for a specified string. After that I am printing the resulting value. For the first time it's working fine. If I call the function using a for loop however I am unable to print the buffer value.</p> <pre><code>void parse_data(char *fname,int flag) { char str[30]="&amp;lt;Response&amp;gt;"; char buffer[1024],temp[1024],temp1[1024]; int nVal=0; FILE *fp; int s_pos; //string position in the text int c_pos; //char position in the text char *string; char ccnt; //char count long lSize; long pos=0; int c; s_pos = -1; c_pos = 0; fp=fopen(fname,"r"); //fseek(fp, 1, SEEK_SET); string = malloc(strlen(str)+1); if(fp==NULL) { printf("Unable to open the file \n"); exit(0); } while (!feof(fp)) { if (c_pos == 0) { for (ccnt = 1; ccnt &lt;= strlen(str); ccnt++) { if (!feof(fp)) { string[ccnt - 1] = getc(fp); if(nVal==1) { buffer[pos++] = string[ccnt -1]; } } //if }//for }//if if (c_pos != 0) if (!feof(fp)) { for (ccnt = 0; ccnt &lt;= strlen(str) - 2; ccnt++) string[ccnt] = string[ccnt + 1]; string[strlen(str) - 1] = getc(fp); if(nVal==1){ buffer[pos++] = string[strlen(str) - 1]; } } if (strcmp(string, str) == 0) { strcpy(str,"&amp;lt;/Response&amp;gt;"); s_pos = c_pos; if(nVal==1){ buffer[pos-strlen(str)]='\0'; break; } nVal=1; } c_pos++; } if(fp!=NULL) fclose(fp); //printf("\n The String position is %d=\n",s_pos); if(flag==0) ParsingString_Inserting_To_DataBase(buffer); else if(flag==1) printf("The Buffer Value is %s \n",buffer); } int main() { int i=0; char fname[30]="/tmp/gcc_trans.html"; for(i=0;i&lt;3;i++) parse_data(fname,1); return 0; } </code></pre>
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    1. USPaul R
    1. USManu
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    1. COWhat are you trying to do? Why do the same function 3 times with the same parameters? It opens and closes the same file every time, so we'd expect the same result 3 times, assuming the file does not change....
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      1. POFile I/O in C language
      1. USHenno Brandsma
 

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