1 /*===- count.c - The 'count' testing tool ---------------------------------===*\
2 *
3 * The LLVM Compiler Infrastructure
4 *
5 * This file is distributed under the University of Illinois Open Source
6 * License. See LICENSE.TXT for details.
7 *
8 \*===----------------------------------------------------------------------===*/
9
10 #include <stdlib.h>
11 #include <stdio.h>
12
main(int argc,char ** argv)13 int main(int argc, char **argv) {
14 unsigned Count, NumLines, NumRead;
15 char Buffer[4096], *End;
16
17 if (argc != 2) {
18 fprintf(stderr, "usage: %s <expected line count>\n", argv[0]);
19 return 2;
20 }
21
22 Count = strtol(argv[1], &End, 10);
23 if (*End != '\0' && End != argv[1]) {
24 fprintf(stderr, "%s: invalid count argument '%s'\n", argv[0], argv[1]);
25 return 2;
26 }
27
28 NumLines = 0;
29 do {
30 unsigned i;
31
32 NumRead = fread(Buffer, 1, sizeof(Buffer), stdin);
33
34 for (i = 0; i != NumRead; ++i)
35 if (Buffer[i] == '\n')
36 ++NumLines;
37 } while (NumRead == sizeof(Buffer));
38
39 if (!feof(stdin)) {
40 fprintf(stderr, "%s: error reading stdin\n", argv[0]);
41 return 3;
42 }
43
44 if (Count != NumLines) {
45 fprintf(stderr, "Expected %d lines, got %d.\n", Count, NumLines);
46 return 1;
47 }
48
49 return 0;
50 }
51