Use '-' to separate words in file names

Eventually we will want more functionality in the shared library and we
will rename it at that point.  Perhaps we'll name it libnih, but for now
let's stick with libconfig-parser.

1 files changed, 172 insertions, 0 deletions

diff --git a/shared/config-parser.c b/shared/config-parser.c
new file mode 100644
index 00000000..3b8c5c20
--- /dev/null
+++ b/shared/config-parser.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "config-parser.h"
+
+static int
+handle_key(const struct config_key *key, const char *value)
+{
+	char *end, *s;
+	int i, len;
+	
+	switch (key->type) {
+	case CONFIG_KEY_INTEGER:
+		i = strtol(value, &end, 0);
+		if (*end != '\n') {
+			fprintf(stderr, "invalid integer: %s\n", value);
+			return -1;
+		}
+		*(int *)key->data = i;
+		return 0;
+
+	case CONFIG_KEY_STRING:
+		len = strlen(value);
+		s = malloc(len);
+		if (s == NULL)
+			return -1;
+		memcpy(s, value, len - 1);
+		s[len - 1] = '\0';
+		*(char **)key->data = s;
+		return 0;
+
+	case CONFIG_KEY_BOOLEAN:
+		if (strcmp(value, "false\n") == 0)
+			*(int *)key->data = 0;
+		else if (strcmp(value, "true\n") == 0)
+			*(int *)key->data = 1;
+		else {
+			fprintf(stderr, "invalid bool: %s\n", value);
+			return -1;
+		}
+		return 0;
+
+	default:
+		assert(0);
+		break;
+	}
+}
+
+int
+parse_config_file(const char *path,
+		  const struct config_section *sections, int num_sections,
+		  void *data)
+{
+	FILE *fp;
+	char line[512], *p;
+	const struct config_section *current = NULL;
+	int i;
+
+	fp = fopen(path, "r");
+	if (fp == NULL) {
+		fprintf(stderr, "couldn't open %s\n", path);
+		return -1;
+	}
+
+	while (fgets(line, sizeof line, fp)) {
+		if (line[0] == '#' || line[0] == '\n') {
+			continue;
+		} if (line[0] == '[') {
+			p = strchr(&line[1], ']');
+			if (!p || p[1] != '\n') {
+				fprintf(stderr, "malformed "
+					"section header: %s\n", line);
+				fclose(fp);
+				return -1;
+			}
+			if (current && current->done)
+				current->done(data);
+			p[0] = '\0';
+			for (i = 0; i < num_sections; i++) {
+				if (strcmp(sections[i].name, &line[1]) == 0) {
+					current = &sections[i];
+					break;
+				}
+			}
+			if (i == num_sections)
+				current = NULL;
+		} else if (p = strchr(line, '='), p != NULL) {
+			if (current == NULL)
+				continue;
+			p[0] = '\0';
+			for (i = 0; i < current->num_keys; i++) {
+				if (strcmp(current->keys[i].name, line) == 0) {
+					if (handle_key(&current->keys[i], &p[1]) < 0) {
+						fclose(fp);
+						return -1;
+					}
+					break;
+				}
+			}
+		} else {
+			fprintf(stderr, "malformed config line: %s\n", line);
+			fclose(fp);
+			return -1;
+		}
+	}
+
+	if (current && current->done)
+		current->done(data);
+
+	fclose(fp);
+
+	return 0;
+}
+
+char *
+config_file_path(const char *name)
+{
+	const char dotconf[] = "/.config/";
+	const char *config_dir;
+	const char *home_dir;
+	char *path;
+	size_t size;
+
+	config_dir = getenv("XDG_CONFIG_HOME");
+	if (!config_dir) {
+		home_dir = getenv("HOME");
+		if (!home_dir) {
+			fprintf(stderr, "HOME is not set, using cwd.\n");
+			return strdup(name);
+		}
+
+		size = strlen(home_dir) + sizeof dotconf + strlen(name);
+		path = malloc(size);
+		if (!path)
+			return NULL;
+
+		snprintf(path, size, "%s%s%s", home_dir, dotconf, name);
+		return path;
+	}
+
+	size = strlen(config_dir) + 1 + strlen(name) + 1;
+	path = malloc(size);
+	if (!path)
+		return NULL;
+
+	snprintf(path, size, "%s/%s", config_dir, name);
+	return path;
+}