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
13int 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