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-rw-r--r--Makefile1
-rw-r--r--libfonts.h20
-rw-r--r--libfonts_get_font_root_dirs.c138
-rw-r--r--libfonts_used_environs.c1
4 files changed, 160 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 185f639..a76310f 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,7 @@ PUBLIC_OBJ =\
libfonts_get_default_font.o\
libfonts_get_default_font_name.o\
libfonts_get_default_rendering_settings.o\
+ libfonts_get_font_root_dirs.o\
libfonts_get_output_dpi.o\
libfonts_get_output_rendering_settings.o\
libfonts_get_subpixel_order_class.o\
diff --git a/libfonts.h b/libfonts.h
index 20a0b5d..a02bc19 100644
--- a/libfonts.h
+++ b/libfonts.h
@@ -1660,6 +1660,26 @@ extern const char *const libfonts_used_environs[];
/**
+ * Get a list of all font root directories, for example
+ * /usr/share/fonts and /usr/local/share/fonts, but not
+ * their subdirectories
+ *
+ * @param dirsp Output parameter for the directory list;
+ * note that directories are not necessarily unique
+ * (however no two returned strings will be identical)
+ * nor do they necessarily exist
+ * @param countp Output parameter for the number of listed directories
+ * @param ctx Optional `struct libfonts_context`
+ * @return 0 on success, -1 on failure
+ *
+ * Unless `*dirsp == NULL` (only happens on failure), `(*dirsp)[*dirsp] == NULL`
+ */
+int libfonts_get_font_root_dirs(char ***, size_t *, struct libfonts_context *);
+
+/* TODO add font listing */
+
+
+/**
* Get the font a default font name aliases to
*
* @param font The default font
diff --git a/libfonts_get_font_root_dirs.c b/libfonts_get_font_root_dirs.c
new file mode 100644
index 0000000..1ebbb96
--- /dev/null
+++ b/libfonts_get_font_root_dirs.c
@@ -0,0 +1,138 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+static int
+add_dirn(char ***dirsp, size_t *countp, size_t *sizep, const char *part1, size_t part1_len, const char *part2, size_t part2_len)
+{
+ char *dir, **new;
+ size_t i;
+
+ if (*countp == *sizep) {
+ if (SIZE_MAX / sizeof(**dirsp) - 8)
+ goto enomem;
+ new = realloc(*dirsp, (*sizep + 8) * sizeof(**dirsp));
+ if (!new)
+ goto enomem;
+ *dirsp = new;
+ *sizep += 8;
+ }
+
+ dir = malloc(part1_len + part2_len + 1);
+ if (!dir) {
+ enomem:
+ errno = ENOMEM;
+ return -1;
+ }
+
+ memcpy(dir, part1, part1_len);
+ memcpy(&dir[part1_len], part2, part2_len + 1);
+
+ for (i = 0; i < *countp; i++) {
+ if (!strcmp(dir, (*dirsp)[i])) {
+ free(dir);
+ return 0;
+ }
+ }
+
+ (*dirsp)[(*countp)++] = dir;
+ return 0;
+}
+
+static int
+add_dir(char ***dirsp, size_t *countp, size_t *sizep, const char *part1, const char *part2)
+{
+ return add_dirn(dirsp, countp, sizep, part1, strlen(part1), part2, strlen(part2));
+}
+
+static int
+add_dirs(char ***dirsp, size_t *countp, size_t *sizep, const char *env, const char *part2)
+{
+ size_t part2_len = strlen(part2);
+ char *p;
+
+ for (; (p = strchr(env, ':')); env = &p[1])
+ if (*p != ':')
+ if (add_dirn(dirsp, countp, sizep, env, (size_t)(p - env), part2, part2_len))
+ return -1;
+
+ return *env ? add_dirn(dirsp, countp, sizep, env, strlen(env), part2, part2_len) : 0;
+}
+
+int
+libfonts_get_font_root_dirs(char ***dirsp, size_t *countp, struct libfonts_context *ctx)
+{
+ const char *env;
+ char **new, *home = NULL;
+ size_t size = 0;
+
+ *dirsp = NULL;
+ *countp = 0;
+
+ env = libfonts_getenv__("LIBFONTS_FONT_DIRS", ctx);
+ if (env && *env && add_dirs(dirsp, countp, &size, env, "/fonts"))
+ goto fail;
+
+ env = libfonts_getenv__("XDG_DATA_HOME", ctx);
+ if (env && *env && add_dir(dirsp, countp, &size, env, "/fonts"))
+ goto fail;
+
+ env = libfonts_getenv__("HOME", ctx);
+ if (env && *env && (add_dir(dirsp, countp, &size, env, "/.local/share/fonts") ||
+ add_dir(dirsp, countp, &size, env, "/.fonts")))
+ goto fail;
+
+ home = libfonts_gethome__(ctx);
+ if (home && *home && (add_dir(dirsp, countp, &size, env, "/.local/share/fonts") ||
+ add_dir(dirsp, countp, &size, env, "/.fonts")))
+ goto fail;
+ free(home);
+ home = NULL;
+
+ env = libfonts_getenv__("XDG_DATA_DIRS", ctx);
+ if (env && *env && add_dirs(dirsp, countp, &size, env, "/fonts"))
+ goto fail;
+
+ if (add_dirs(dirsp, countp, &size, "/usr/local/share", "/fonts"))
+ goto fail;
+ if (add_dirs(dirsp, countp, &size, "/usr/share", "/fonts"))
+ goto fail;
+
+ if (*countp == size) {
+ if (SIZE_MAX / sizeof(**dirsp) - 1)
+ goto enomem;
+ new = realloc(*dirsp, (size + 1) * sizeof(**dirsp));
+ if (!new)
+ goto enomem;
+ *dirsp = new;
+ }
+ (*dirsp)[*countp] = NULL;
+
+ return 0;
+
+enomem:
+ errno = ENOMEM;
+fail:
+ if (dirsp)
+ while (*countp)
+ free((*dirsp)[--*countp]);
+ free(*dirsp);
+ free(home);
+ *dirsp = NULL;
+ *countp = 0;
+ return -1;
+}
+
+
+#else
+
+
+int
+main(void)
+{
+ return 0; /* XXX add test */
+}
+
+
+#endif
diff --git a/libfonts_used_environs.c b/libfonts_used_environs.c
index 54232b4..1ce3c39 100644
--- a/libfonts_used_environs.c
+++ b/libfonts_used_environs.c
@@ -7,6 +7,7 @@ const char *const libfonts_used_environs[] = {
"LIBFONTS_DEFAULT_SANS_SERIF",
"LIBFONTS_DEFAULT_SERIF",
"LIBFONTS_DEFAULT_MONOSPACE",
+ "LIBFONTS_FONT_DIRS",
"XDG_CONFIG_HOME",
"HOME",
NULL