diff options
Diffstat (limited to 'libfonts_get_default_font.c')
| -rw-r--r-- | libfonts_get_default_font.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/libfonts_get_default_font.c b/libfonts_get_default_font.c new file mode 100644 index 0000000..d27e661 --- /dev/null +++ b/libfonts_get_default_font.c @@ -0,0 +1,210 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" +#ifndef TEST + + +static char * +find(const char *dir_part1, const char *dir_part2, const char *dir_part3) +{ + return NULL; /* TODO */ +} + +static char * +gethome(void) +{ + uid_t uid = getuid(); + size_t size = 512; + char *buf = NULL, *new; + char *ret = NULL; + struct passwd pw, *pwp; + int err; + + goto beginning; + + do { + if (size > SIZE_MAX / 2) + goto enomem; + size *= 2; + beginning: + new = realloc(buf, size); + if (!new) { + enomem: + free(buf); + errno = ENOMEM; + return NULL; + } + buf = new; + } while ((err = getpwuid_r(uid, &pw, buf, size, &pwp)) == ERANGE); + if (err) { + free(buf); + return NULL; + } + + if (pwp && pwp->pw_dir) + ret = strdup(pwp->pw_dir); + free(buf); + return ret; +} + +static char * +getn(const char *file_part1, size_t file_part1_len, const char *file_part2, 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 NULL; + } + + memcpy(path, file_part1, file_part1_len); + memcpy(&path[file_part1_len], file_part2, file_part2_len + 1); + + /* TODO + * sans-serif = $FONTNAME + * serif = $FONTNAME + * monospace = $FONTNAME + */ + + free(path); + return NULL; +} + +static char * +get(const char *file_part1, const char *file_part2, const char *name) +{ + return getn(file_part1, strlen(file_part1), file_part2, name); +} + +char * +libfonts_get_default_font(enum libfonts_default_font font) +{ + const char *env, *var, *next; + char *ret, *home = NULL; + int saved_errno = errno; + size_t len; + + if (font == LIBFONTS_DEFAULT_SANS_SERIF) { + env = "LIBFONTS_DEFAULT_SANS_SERIF"; + var = "sans-serif"; + } else if (font == LIBFONTS_DEFAULT_SERIF) { + env = "LIBFONTS_DEFAULT_SERIF"; + var = "serif"; + } else if (font == LIBFONTS_DEFAULT_MONOSPACE) { + env = "LIBFONTS_DEFAULT_MONOSPACE"; + var = "monospace"; + } else { + errno = EINVAL; + return NULL; + } + + ret = getenv(env); + if (ret && *ret) + return strdup(ret); + + env = getenv("XDG_CONFIG_HOME"); + if (env && *env) { + ret = get(env, "/libfonts/default-fonts.conf", var); + if (ret) + goto out; + } + + env = getenv("HOME"); + if (env && *env) { + ret = get(env, "/.config/libfonts/default-fonts.conf", var); + if (ret) + goto out; + ret = get(env, "/.libfonts/default-fonts.conf", var); + if (ret) + goto out; + } + + home = gethome(); + if (home && *home) { + ret = get(home, "/.config/libfonts/default-fonts.conf", var); + if (ret) + goto out; + ret = get(home, "/.libfonts/default-fonts.conf", var); + if (ret) + goto out; + } + + env = getenv("XDG_CONFIG_HOME"); + if (env && *env) { + ret = find(env, "/libfonts/", var); + if (ret) + goto out; + } + + env = getenv("HOME"); + if (env && *env) { + ret = find(env, "/.config/libfonts/", var); + if (ret) + goto out; + ret = find(env, "/.libfonts/", var); + if (ret) + goto out; + } + + if (home && *home) { + ret = find(env, "/.config/libfonts/", var); + if (ret) + goto out; + ret = find(env, "/.libfonts/", var); + if (ret) + goto out; + } + + env = getenv("XDG_CONFIG_DIRS"); + if (env && *env) { + do { + next = strchr(&env[1], ':'); + len = next ? (size_t)(next - env) : strlen(env); + if (len) { + ret = getn(env, len, "/libfonts/default-fonts.conf", var); + if (ret) + goto out; + } + env += len + 1; + } while (next); + } + + ret = get("/etc", "/libfonts/default-fonts.conf", var); + if (ret) + goto out; + + ret = find("/etc", "/libfonts/", var); + if (ret) + goto out; + + /* TODO + * as a last resort look around for some + * font that matches the specification as + * well as possible + */ + + ret = NULL; + +out: + free(home); + errno = saved_errno; + return ret; +} + + +#else + + +int +main(void) +{ + return 0; /* TODO add test */ +} + + +#endif |