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authorDaniel Stone <daniels@collabora.com>2019-11-25 12:26:36 +0000
committerDaniel Stone <daniels@collabora.com>2019-11-25 14:41:45 +0000
commitaa4ba5d283d641da25722af7a966c31d61a9686b (patch)
treee48b6b43b8b119640ae4d9452eb77e561698f2ca /shared/option-parser.c
parent9c29d2c7870a617bbb9eb521bc1ab8757934e536 (diff)
Signed-off-by: Daniel Stone <daniels@collabora.com> Change-Id: I7705fa82dab29a27e4913cd548a2f5c3247dc5ad
Diffstat (limited to 'shared/option-parser.c')
-rw-r--r--shared/option-parser.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/shared/option-parser.c b/shared/option-parser.c
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+++ b/shared/option-parser.c
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+/*
+ * Copyright © 2012 Kristian Høgsberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <libweston-6/config-parser.h>
+#include "shared/string-helpers.h"
+
+static bool
+handle_option(const struct weston_option *option, char *value)
+{
+ char* p;
+
+ switch (option->type) {
+ case WESTON_OPTION_INTEGER:
+ if (!safe_strtoint(value, option->data))
+ return false;
+ return true;
+ case WESTON_OPTION_UNSIGNED_INTEGER:
+ errno = 0;
+ * (uint32_t *) option->data = strtoul(value, &p, 10);
+ if (errno != 0 || p == value || *p != '\0')
+ return false;
+ return true;
+ case WESTON_OPTION_STRING:
+ * (char **) option->data = strdup(value);
+ return true;
+ default:
+ assert(0);
+ return false;
+ }
+}
+
+static bool
+long_option(const struct weston_option *options, int count, char *arg)
+{
+ int k, len;
+
+ for (k = 0; k < count; k++) {
+ if (!options[k].name)
+ continue;
+
+ len = strlen(options[k].name);
+ if (strncmp(options[k].name, arg + 2, len) != 0)
+ continue;
+
+ if (options[k].type == WESTON_OPTION_BOOLEAN) {
+ if (!arg[len + 2]) {
+ * (int32_t *) options[k].data = 1;
+
+ return true;
+ }
+ } else if (arg[len+2] == '=') {
+ return handle_option(options + k, arg + len + 3);
+ }
+ }
+
+ return false;
+}
+
+static bool
+long_option_with_arg(const struct weston_option *options, int count, char *arg,
+ char *param)
+{
+ int k, len;
+
+ for (k = 0; k < count; k++) {
+ if (!options[k].name)
+ continue;
+
+ len = strlen(options[k].name);
+ if (strncmp(options[k].name, arg + 2, len) != 0)
+ continue;
+
+ /* Since long_option() should handle all booleans, we should
+ * never reach this
+ */
+ assert(options[k].type != WESTON_OPTION_BOOLEAN);
+
+ return handle_option(options + k, param);
+ }
+
+ return false;
+}
+
+static bool
+short_option(const struct weston_option *options, int count, char *arg)
+{
+ int k;
+
+ if (!arg[1])
+ return false;
+
+ for (k = 0; k < count; k++) {
+ if (options[k].short_name != arg[1])
+ continue;
+
+ if (options[k].type == WESTON_OPTION_BOOLEAN) {
+ if (!arg[2]) {
+ * (int32_t *) options[k].data = 1;
+
+ return true;
+ }
+ } else if (arg[2]) {
+ return handle_option(options + k, arg + 2);
+ } else {
+ return false;
+ }
+ }
+
+ return false;
+}
+
+static bool
+short_option_with_arg(const struct weston_option *options, int count, char *arg, char *param)
+{
+ int k;
+
+ if (!arg[1])
+ return false;
+
+ for (k = 0; k < count; k++) {
+ if (options[k].short_name != arg[1])
+ continue;
+
+ if (options[k].type == WESTON_OPTION_BOOLEAN)
+ continue;
+
+ return handle_option(options + k, param);
+ }
+
+ return false;
+}
+
+int
+parse_options(const struct weston_option *options,
+ int count, int *argc, char *argv[])
+{
+ int i, j;
+
+ for (i = 1, j = 1; i < *argc; i++) {
+ if (argv[i][0] == '-') {
+ if (argv[i][1] == '-') {
+ /* Long option, e.g. --foo or --foo=bar */
+ if (long_option(options, count, argv[i]))
+ continue;
+
+ /* ...also handle --foo bar */
+ if (i + 1 < *argc &&
+ long_option_with_arg(options, count,
+ argv[i], argv[i+1])) {
+ i++;
+ continue;
+ }
+ } else {
+ /* Short option, e.g -f or -f42 */
+ if (short_option(options, count, argv[i]))
+ continue;
+
+ /* ...also handle -f 42 */
+ if (i+1 < *argc &&
+ short_option_with_arg(options, count, argv[i], argv[i+1])) {
+ i++;
+ continue;
+ }
+ }
+ }
+ argv[j++] = argv[i];
+ }
+ argv[j] = NULL;
+ *argc = j;
+
+ return j;
+}