Draft implementations of libfonts_get_{default,output}_rendering_settings

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 115 insertions, 0 deletions

diff --git a/libfonts_get_output_rendering_settings.c b/libfonts_get_output_rendering_settings.c
new file mode 100644
index 0000000..07a967c
--- /dev/null
+++ b/libfonts_get_output_rendering_settings.c
@@ -0,0 +1,115 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+static int
+getn(const char *file_part1, size_t file_part1_len, const char *file_part2,
+     struct libfonts_rendering_settings *settings, const char *name)
+{
+	size_t file_part2_len = strlen(file_part2);
+	char *path;
+
+	if (file_part1_len > SIZE_MAX - file_part2_len - 1)
+		goto enomem;
+
+	path = malloc(file_part1_len + file_part2_len + 1);
+	if (!path) {
+	enomem:
+		errno = ENOMEM;
+		return 0; /* TODO abort function */
+	}
+
+	memcpy(path, file_part1, file_part1_len);
+	memcpy(&path[file_part1_len], file_part2, file_part2_len + 1);
+
+	/* TODO look for "[$name]" */
+	/* TODO (use LIST_RENDERING_SETTINGS) */
+
+	free(path);
+	return 1;
+}
+
+static int
+get(const char *file_part1, const char *file_part2, struct libfonts_rendering_settings *settings, const char *name)
+{
+	return getn(file_part1, strlen(file_part1), file_part2, settings, name);
+}
+
+int
+libfonts_get_output_rendering_settings(struct libfonts_rendering_settings *settings, const char *name, struct libfonts_context *ctx)
+{
+
+	const char *env, *next;
+	char *home = NULL;
+	int saved_errno = errno;
+	int ret = 0;
+	size_t len;
+
+	if (!name) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (settings) {
+#define X(CONFNAME, CNAME, DEFVAL) settings->CNAME = DEFVAL
+		LIST_RENDERING_SETTINGS(X, ;);
+#undef X
+	}
+
+	env = libfonts_getenv__("XDG_CONFIG_HOME", ctx);
+	if (env && *env)
+		if (get(env, "/libfonts/output-rendering.conf", settings, name))
+			goto out;
+
+	env = libfonts_getenv__("HOME", ctx);
+	if (env && *env) {
+		if (get(env, "/.config/libfonts/output-rendering.conf", settings, name))
+			goto out;
+		if (get(env, "/.libfonts/output-rendering.conf", settings, name))
+			goto out;
+	}
+
+	home = libfonts_gethome__(ctx);
+	if (home && *home) {
+		if (get(home, "/.config/libfonts/output-rendering.conf", settings, name))
+			goto out;
+		if (get(home, "/.libfonts/output-rendering.conf", settings, name))
+			goto out;
+	}
+
+	env = libfonts_getenv__("XDG_CONFIG_DIRS", ctx);
+	if (env && *env) {
+		do {
+			next = strchr(&env[1], ':');
+			len = next ? (size_t)(next - env) : strlen(env);
+			if (len)
+				if (getn(env, len, "/libfonts/output-rendering.conf", settings, name))
+					goto out;
+			env += len + 1;
+		} while (next);
+	}
+
+	if (get("/etc", "/libfonts/output-rendering.conf", settings, name))
+		goto out;
+
+	ret = 0;
+
+out:
+	free(home);
+	errno = saved_errno;
+	return ret;
+}
+
+
+#else
+
+
+int
+main(void)
+{
+	return 0; /* TODO add test */
+}
+
+
+#endif