[PATCH 3/7] test: add new test tool parse-time for date/time parser

[Jani Nikula]

Add a tool to support testing the date/time parser module directly and
independent of the rest of notmuch.
---
 test/Makefile.local |    9 +++-
 test/basic          |    2 +-
 test/parse-time.c   |  145 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 153 insertions(+), 3 deletions(-)
 create mode 100644 test/parse-time.c

diff --git a/test/Makefile.local b/test/Makefile.local
index 4a6a4b1..729f38e 100644
--- a/test/Makefile.local
+++ b/test/Makefile.local
@@ -19,9 +19,13 @@ $(dir)/smtp-dummy: $(smtp_dummy_modules)
 $(dir)/symbol-test: $(dir)/symbol-test.o
 	$(call quiet,CXX) $^ -o $@ -Llib -lnotmuch -lxapian
 
+$(dir)/parse-time: $(dir)/parse-time.o lib/parse-time-string.o
+	$(call quiet,CC) $^ -o $@
+
 .PHONY: test check
 
-test-binaries: $(dir)/arg-test $(dir)/smtp-dummy $(dir)/symbol-test
+test-binaries: $(dir)/arg-test $(dir)/smtp-dummy $(dir)/symbol-test \
+	$(dir)/parse-time
 
 test:	all test-binaries
 	@${dir}/notmuch-test $(OPTIONS)
@@ -31,4 +35,5 @@ check: test
 SRCS := $(SRCS) $(smtp_dummy_srcs)
 CLEAN := $(CLEAN) $(dir)/smtp-dummy $(dir)/smtp-dummy.o \
 	 $(dir)/symbol-test $(dir)/symbol-test.o \
-	 $(dir)/arg-test $(dir)/arg-test.o
+	 $(dir)/arg-test $(dir)/arg-test.o \
+	 $(dir)/parse-time $(dir)/parse-time.o
diff --git a/test/basic b/test/basic
index d6aed24..c658b95 100755
--- a/test/basic
+++ b/test/basic
@@ -54,7 +54,7 @@ test_begin_subtest 'Ensure that all available tests will be run by notmuch-test'
 eval $(sed -n -e '/^TESTS="$/,/^"$/p' $TEST_DIRECTORY/notmuch-test)
 tests_in_suite=$(for i in $TESTS; do echo $i; done | sort)
 available=$(find "$TEST_DIRECTORY" -maxdepth 1 -type f -executable -printf '%f\n' | \
-    sed -r -e "/^(aggregate-results.sh|notmuch-test|smtp-dummy|test-verbose|symbol-test|arg-test)$/d" | \
+    sed -r -e "/^(aggregate-results.sh|notmuch-test|smtp-dummy|test-verbose|symbol-test|arg-test|parse-time)$/d" | \
     sort)
 test_expect_equal "$tests_in_suite" "$available"
 
diff --git a/test/parse-time.c b/test/parse-time.c
new file mode 100644
index 0000000..b4de76b
--- /dev/null
+++ b/test/parse-time.c
@@ -0,0 +1,145 @@
+/*
+ * parse time string - user friendly date and time parser
+ * Copyright © 2012 Jani Nikula
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Jani Nikula <jani at nikula.org>
+ */
+
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "parse-time-string.h"
+
+/*
+ * concat argv[start]...argv[end - 1], separating them by a single
+ * space, to a malloced string
+ */
+static char *
+concat_args (int start, int end, char *argv[])
+{
+    int i;
+    size_t len = 1;
+    char *p;
+
+    for (i = start; i < end; i++)
+	len += strlen (argv[i]) + 1;
+
+    p = malloc (len);
+    if (!p)
+	return NULL;
+
+    *p = 0;
+
+    for (i = start; i < end; i++) {
+	if (i != start)
+	    strcat (p, " ");
+	strcat (p, argv[i]);
+    }
+
+    return p;
+}
+
+#define DEFAULT_FORMAT "%a %b %d %T %z %Y"
+
+static void
+usage (const char *name)
+{
+    printf ("Usage: %s [options ...] <date/time>\n\n", name);
+    printf (
+	"Parse <date/time> and display it in given format.\n\n"
+	"  -f, --format=FMT output format, FMT according to strftime(3)\n"
+	"                   (default: \"%s\")\n"
+	"  -n, --now=N      use N seconds since epoch as now (default: now)\n"
+	"  -u, --up         round result up (default: no rounding)\n"
+	"  -d, --down       round result down (default: no rounding)\n"
+	"  -h, --help       print this help\n",
+	DEFAULT_FORMAT);
+}
+
+int
+main (int argc, char *argv[])
+{
+    int r;
+    struct tm tm;
+    time_t result;
+    time_t now;
+    time_t *nowp = NULL;
+    char *argstr;
+    int round = PARSE_TIME_NO_ROUND;
+    char buf[1024];
+    const char *format = DEFAULT_FORMAT;
+    struct option options[] = {
+	{ "help",	no_argument,		NULL,	'h' },
+	{ "up",		no_argument,		NULL,	'u' },
+	{ "down",	no_argument,		NULL,	'd' },
+	{ "format",	required_argument,	NULL,	'f' },
+	{ "now",	required_argument,	NULL,	'n' },
+	{ NULL, 0, NULL, 0 },
+    };
+
+    for (;;) {
+	int c;
+
+	c = getopt_long (argc, argv, "hudf:n:", options, NULL);
+	if (c == -1)
+	    break;
+
+	switch (c) {
+	case 'f':
+	    /* output format */
+	    format = optarg;
+	    break;
+	case 'u':
+	    round = PARSE_TIME_ROUND_UP;
+	    break;
+	case 'd':
+	    round = PARSE_TIME_ROUND_DOWN;
+	    break;
+	case 'n':
+	    /* specify now in seconds since epoch */
+	    now = (time_t) strtol (optarg, NULL, 10);
+	    if (now >= (time_t) 0)
+		nowp = &now;
+	    break;
+	case 'h':
+	case '?':
+	default:
+	    usage (argv[0]);
+	    return 1;
+	}
+    }
+
+    argstr = concat_args (optind, argc, argv);
+    if (!argstr)
+	return 1;
+
+    r = parse_time_string (argstr, &result, nowp, round);
+
+    free (argstr);
+
+    if (r)
+	return 1;
+
+    if (!localtime_r (&result, &tm))
+	return 1;
+
+    strftime (buf, sizeof (buf), format, &tm);
+    printf ("%s\n", buf);
+
+    return 0;
+}
-- 
1.7.9.5