command: move code to protocol/argparser.c

2 files changed, 240 insertions, 0 deletions

diff --git a/src/protocol/argparser.c b/src/protocol/argparser.c
new file mode 100644
index 00000000..b21d4c53
--- /dev/null
+++ b/src/protocol/argparser.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright (C) 2003-2012 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "argparser.h"
+#include "result.h"
+
+#include <glib.h>
+#include <stdlib.h>
+
+bool
+check_uint32(struct client *client, uint32_t *dst, const char *s)
+{
+	char *test;
+
+	*dst = strtoul(s, &test, 10);
+	if (test == s || *test != '\0') {
+		command_error(client, ACK_ERROR_ARG,
+			      "Integer expected: %s", s);
+		return false;
+	}
+	return true;
+}
+
+bool
+check_int(struct client *client, int *value_r, const char *s)
+{
+	char *test;
+	long value;
+
+	value = strtol(s, &test, 10);
+	if (test == s || *test != '\0') {
+		command_error(client, ACK_ERROR_ARG,
+			      "Integer expected: %s", s);
+		return false;
+	}
+
+#if G_MAXLONG > G_MAXINT
+	if (value < G_MININT || value > G_MAXINT) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Number too large: %s", s);
+		return false;
+	}
+#endif
+
+	*value_r = (int)value;
+	return true;
+}
+
+bool
+check_range(struct client *client, unsigned *value_r1, unsigned *value_r2,
+	    const char *s)
+{
+	char *test, *test2;
+	long value;
+
+	value = strtol(s, &test, 10);
+	if (test == s || (*test != '\0' && *test != ':')) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Integer or range expected: %s", s);
+		return false;
+	}
+
+	if (value == -1 && *test == 0) {
+		/* compatibility with older MPD versions: specifying
+		   "-1" makes MPD display the whole list */
+		*value_r1 = 0;
+		*value_r2 = G_MAXUINT;
+		return true;
+	}
+
+	if (value < 0) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Number is negative: %s", s);
+		return false;
+	}
+
+#if G_MAXLONG > G_MAXUINT
+	if (value > G_MAXUINT) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Number too large: %s", s);
+		return false;
+	}
+#endif
+
+	*value_r1 = (unsigned)value;
+
+	if (*test == ':') {
+		value = strtol(++test, &test2, 10);
+		if (test2 == test || *test2 != '\0') {
+			command_error(client, ACK_ERROR_ARG,
+				      "Integer or range expected: %s", s);
+			return false;
+		}
+
+		if (test == test2)
+			value = G_MAXUINT;
+
+		if (value < 0) {
+			command_error(client, ACK_ERROR_ARG,
+				      "Number is negative: %s", s);
+			return false;
+		}
+
+#if G_MAXLONG > G_MAXUINT
+		if (value > G_MAXUINT) {
+			command_error(client, ACK_ERROR_ARG,
+				      "Number too large: %s", s);
+			return false;
+		}
+#endif
+		*value_r2 = (unsigned)value;
+	} else {
+		*value_r2 = (unsigned)value + 1;
+	}
+
+	return true;
+}
+
+bool
+check_unsigned(struct client *client, unsigned *value_r, const char *s)
+{
+	unsigned long value;
+	char *endptr;
+
+	value = strtoul(s, &endptr, 10);
+	if (endptr == s || *endptr != 0) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Integer expected: %s", s);
+		return false;
+	}
+
+	if (value > G_MAXUINT) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Number too large: %s", s);
+		return false;
+	}
+
+	*value_r = (unsigned)value;
+	return true;
+}
+
+bool
+check_bool(struct client *client, bool *value_r, const char *s)
+{
+	long value;
+	char *endptr;
+
+	value = strtol(s, &endptr, 10);
+	if (endptr == s || *endptr != 0 || (value != 0 && value != 1)) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Boolean (0/1) expected: %s", s);
+		return false;
+	}
+
+	*value_r = !!value;
+	return true;
+}
+
+bool
+check_float(struct client *client, float *value_r, const char *s)
+{
+	float value;
+	char *endptr;
+
+	value = strtof(s, &endptr);
+	if (endptr == s || *endptr != 0) {
+		command_error(client, ACK_ERROR_ARG,
+			      "Float expected: %s", s);
+		return false;
+	}
+
+	*value_r = value;
+	return true;
+}
diff --git a/src/protocol/argparser.h b/src/protocol/argparser.h
new file mode 100644
index 00000000..e88aea47
--- /dev/null
+++ b/src/protocol/argparser.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2003-2012 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_PROTOCOL_ARGPARSER_H
+#define MPD_PROTOCOL_ARGPARSER_H
+
+#include "check.h"
+
+#include <stdbool.h>
+#include <stdint.h>
+
+struct client;
+
+bool
+check_uint32(struct client *client, uint32_t *dst, const char *s);
+
+bool
+check_int(struct client *client, int *value_r, const char *s);
+
+bool
+check_range(struct client *client, unsigned *value_r1, unsigned *value_r2,
+	    const char *s);
+
+bool
+check_unsigned(struct client *client, unsigned *value_r, const char *s);
+
+bool
+check_bool(struct client *client, bool *value_r, const char *s);
+
+bool
+check_float(struct client *client, float *value_r, const char *s);
+
+#endif