102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
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/*
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* C program to Display the Function Names defined in C Source File
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*/
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#include <stdio.h>
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#include <string.h>
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void check(char *c,int p1, int p2);
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void display(char *c, int p1);
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void main(int argc, char **argv)
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{
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FILE *fp;
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char ch[100];
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char *pos1, *pos2, *pos3;
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fp=fopen(argv[1], "r");
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if (fp == NULL)
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{
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printf("\nFile unable to open");
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return;
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}
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else
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printf("\nFile Opened to display function names :\n");
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while (1)
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{
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if ((fgets(ch, 100, fp)) != NULL)
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{
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if ((strstr(ch, "/*")) == NULL)
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{
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pos1 = strchr(ch, '('); /* check opening brace */
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if (pos1)
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{
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pos2 = strchr(ch,')'); /* check oclosing brace */
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if (pos2)
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{
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pos3 = strchr(ch,';'); /* check for semicolon */
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if ((pos1 < pos2) && (pos3 == NULL) || (pos3 < pos1))
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{
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check(ch, pos1 - ch, pos2 - ch);
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}
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else continue;
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}
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else continue;
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}
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else continue;
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}
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else continue;
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}
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else break;
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}
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fclose(fp);
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}
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/* To check if it is a function */
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void check(char *c, int p1, int p2)
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{
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int i, flag = 0, temp = p1;
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if ((c[p1 + 1] == ')'))
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{
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display(c, p1);
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return;
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}
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for (i = p1 + 1; i < p2; i++)
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{
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if ((c[i] != ' ') || (c[i] == ')'))
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{
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flag = 1;
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}
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if (flag == 0)
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{
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display(c, p1);
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return;
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}
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else
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{
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flag = 0;
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while (c[--temp] != ' ');
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for (i = 0; i < temp; i++)
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if (c[i]==' ')
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{
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flag = 1;
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}
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if (flag == 0)
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{
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display(c, p1);
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return;
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}
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else
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return;
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}
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}
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}
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/* To display function name */
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void display(char *c,int p1)
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{
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int temp = p1, i;
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while (c[--temp] != ' ');
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for (i = temp + 1; i < p1; i++) /* Print name of function character by character */
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printf("%c", c[i]);
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printf("\n");
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return;
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}
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