Tests for getdelim().

tools/regression/lib/libc/stdio/Makefile

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-TESTS=	test-perror test-print-positional test-printbasic test-printfloat test-scanfloat
+TESTS=	test-getdelim test-perror test-print-positional test-printbasic test-printfloat test-scanfloat
 CFLAGS+= -lm
 
 .PHONY: tests

tools/regression/lib/libc/stdio/test-getdelim.c

@@ -0,0 +1,168 @@
+/*-
+ * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#define	_WITH_GETLINE
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define	CHUNK_MAX	10
+
+/* The assertions depend on this string. */
+char apothegm[] = "All work and no play\0 makes Jack a dull boy.\n";
+
+/*
+ * This is a neurotic reader function designed to give getdelim() a
+ * hard time. It reads through the string `apothegm' and returns a
+ * random number of bytes up to the requested length.
+ */
+static int
+_reader(void *cookie, char *buf, int len)
+{
+	size_t *offp = cookie;
+	size_t r;
+
+	r = random() % CHUNK_MAX + 1;
+	if (len > r)
+		len = r;
+	if (len > sizeof(apothegm) - *offp)
+		len = sizeof(apothegm) - *offp;
+	memcpy(buf, apothegm + *offp, len);
+	*offp += len;
+	return (len);
+}
+
+static FILE *
+mkfilebuf(void)
+{
+	size_t *offp;
+
+	offp = malloc(sizeof(*offp));	/* XXX leak */
+	*offp = 0;
+	return (fropen(offp, _reader));
+}
+
+int
+main(int argc, char *argv[])
+{
+	FILE *fp;
+	char *line;
+	size_t linecap;
+	int i, n;
+
+	srandom(0);
+
+	printf("1..5\n");
+
+	/*
+	 * Test multiple times with different buffer sizes
+	 * and different _reader() return values.
+	 */
+	errno = 0;
+	for (i = 0; i < 8; i++) {
+		fp = mkfilebuf();
+		linecap = i;
+		line = malloc(i);
+		/* First line: the full apothegm */
+		assert(getline(&line, &linecap, fp) == sizeof(apothegm) - 1);
+		assert(memcmp(line, apothegm, sizeof(apothegm)) == 0);
+		assert(linecap >= sizeof(apothegm));
+		/* Second line: the NUL terminator following the newline */
+		assert(getline(&line, &linecap, fp) == 1);
+		assert(line[0] == '\0' && line[1] == '\0');
+		/* Third line: EOF */
+		line[0] = 'X';
+		assert(getline(&line, &linecap, fp) == 0);
+		assert(line[0] == '\0');
+		free(line);
+		assert(feof(fp));
+		assert(!ferror(fp));
+		fclose(fp);
+	}
+	assert(errno == 0);
+	printf("ok 1 - getline basic\n");
+
+	/* Make sure read errors are handled properly. */
+	linecap = 0;
+	errno = 0;
+	assert(getline(&line, &linecap, stdout) == -1);
+	assert(errno == EBADF);
+	errno = 0;
+	assert(getdelim(&line, &linecap, 'X', stdout) == -1);
+	assert(errno == EBADF);
+	assert(ferror(stdout));
+	printf("ok 2 - stream error\n");
+
+	/* Make sure NULL linep or linecapp pointers are handled. */
+	fp = mkfilebuf();
+	assert(getline(NULL, &linecap, fp) == -1);
+	assert(errno == EINVAL);
+	assert(getline(&line, NULL, fp) == -1);
+	assert(errno == EINVAL);
+	assert(ferror(fp));
+	fclose(fp);
+	printf("ok 3 - invalid params\n");
+
+	/* Make sure getline() allocates memory as needed if fp is at EOF. */
+	errno = 0;
+	fp = mkfilebuf();
+	while (!feof(fp))	/* advance to EOF; can't fseek this stream */
+		getc(fp);
+	free(line);
+	line = NULL;
+	linecap = 0;
+	assert(getline(&line, &linecap, fp) == 0);
+	assert(line[0] == '\0');
+	assert(linecap > 0);
+	assert(errno == 0);
+	assert(feof(fp));
+	assert(!ferror(fp));
+	fclose(fp);
+	printf("ok 4 - eof\n");
+
+	/* Make sure a NUL delimiter works. */
+	fp = mkfilebuf();
+	n = strlen(apothegm);
+	assert(getdelim(&line, &linecap, '\0', fp) == n + 1);
+	assert(strcmp(line, apothegm) == 0);
+	assert(line[n + 1] == '\0');
+	assert(linecap > n + 1);
+	n = strlen(apothegm + n + 1);
+	assert(getdelim(&line, &linecap, '\0', fp) == n + 1);
+	assert(line[n + 1] == '\0');
+	assert(linecap > n + 1);
+	assert(errno == 0);
+	assert(!ferror(fp));
+	fclose(fp);
+	printf("ok 5 - nul\n");
+
+	exit(0);
+}