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