diff options
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | libfonts.h | 20 | ||||
| -rw-r--r-- | libfonts_get_font_root_dirs.c | 138 | ||||
| -rw-r--r-- | libfonts_used_environs.c | 1 |
4 files changed, 160 insertions, 0 deletions
@@ -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\ @@ -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 |