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/*===- count.c - The 'count' testing tool ---------------------------------===*\
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
\*===----------------------------------------------------------------------===*/
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char **argv) {
size_t Count, NumLines, NumRead;
char Buffer[4096], *End;
if (argc != 2) {
fprintf(stderr, "usage: %s <expected line count>\n", argv[0]);
return 2;
}
Count = strtoul(argv[1], &End, 10);
if (*End != '\0' && End != argv[1]) {
fprintf(stderr, "%s: invalid count argument '%s'\n", argv[0], argv[1]);
return 2;
}
NumLines = 0;
do {
size_t i;
NumRead = fread(Buffer, 1, sizeof(Buffer), stdin);
for (i = 0; i != NumRead; ++i)
if (Buffer[i] == '\n')
++NumLines;
} while (NumRead == sizeof(Buffer));
if (!feof(stdin)) {
fprintf(stderr, "%s: error reading stdin\n", argv[0]);
return 3;
}
if (Count != NumLines) {
fprintf(stderr, "Expected %zu lines, got %zu.\n", Count, NumLines);
return 1;
}
return 0;
}
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