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Diffstat (limited to 'src/compose/paths.c')
-rw-r--r-- | src/compose/paths.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/compose/paths.c b/src/compose/paths.c new file mode 100644 index 0000000..c96d7d2 --- /dev/null +++ b/src/compose/paths.c @@ -0,0 +1,204 @@ +/* + * Copyright © 2014 Ran Benita <ran234@gmail.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include "utils.h" +#include "paths.h" + +enum resolve_name_direction { + LEFT_TO_RIGHT, + RIGHT_TO_LEFT, +}; + +const char * +get_xlocaledir_path(void) +{ + const char *dir = secure_getenv("XLOCALEDIR"); + if (!dir) + dir = XLOCALEDIR; + return dir; +} + +/* + * Files like compose.dir have the format LEFT: RIGHT. Lookup @name in + * such a file and return its matching value, according to @direction. + * @filename is relative to the xlocaledir. + */ +static char * +resolve_name(const char *filename, enum resolve_name_direction direction, + const char *name) +{ + int ret; + bool ok; + const char *xlocaledir; + char path[512]; + FILE *file; + const char *string, *end; + size_t string_size; + const char *s, *left, *right; + char *match; + size_t left_len, right_len, name_len; + + xlocaledir = get_xlocaledir_path(); + + ret = snprintf(path, sizeof(path), "%s/%s", xlocaledir, filename); + if (ret < 0 || (size_t) ret >= sizeof(path)) + return false; + + file = fopen(path, "r"); + if (!file) + return false; + + ok = map_file(file, &string, &string_size); + fclose(file); + if (!ok) + return false; + + s = string; + end = string + string_size; + name_len = strlen(name); + match = NULL; + + while (s < end) { + /* Skip spaces. */ + while (s < end && is_space(*s)) + s++; + + /* Skip comments. */ + if (s < end && *s == '#') { + while (s < end && *s != '\n') + s++; + continue; + } + + /* Get the left value. */ + left = s; + while (s < end && !is_space(*s) && *s != ':') + s++; + left_len = s - left; + + /* There's an optional colon between left and right. */ + if (s < end && *s == ':') + s++; + + /* Skip spaces. */ + while (s < end && is_space(*s)) + s++; + + /* Get the right value. */ + right = s; + while (s < end && !is_space(*s)) + s++; + right_len = s - right; + + /* Discard rest of line. */ + while (s < end && *s != '\n') + s++; + + if (direction == LEFT_TO_RIGHT) { + if (left_len == name_len && strncmp(left, name, left_len) == 0) { + match = strndup(right, right_len); + break; + } + } + else if (direction == RIGHT_TO_LEFT) { + if (right_len == name_len && strncmp(right, name, right_len) == 0) { + match = strndup(left, left_len); + break; + } + } + } + + unmap_file(string, string_size); + return match; +} + +char * +resolve_locale(const char *locale) +{ + char *alias = resolve_name("locale.alias", LEFT_TO_RIGHT, locale); + return alias ? alias : strdup(locale); +} + +const char * +get_xcomposefile_path(void) +{ + return secure_getenv("XCOMPOSEFILE"); +} + +char * +get_home_xcompose_file_path(void) +{ + int ret; + const char *home; + char *path; + + home = secure_getenv("HOME"); + if (!home) + return NULL; + + ret = asprintf(&path, "%s/.XCompose", home); + if (ret <0) + return NULL; + + return path; +} + +char * +get_locale_compose_file_path(const char *locale) +{ + int ret; + const char *xlocaledir; + char *resolved; + char *path; + + /* + * WARNING: Random workaround ahead. + * + * We currently do not support non-UTF-8 Compose files. The C/POSIX + * locale is specified to be the default fallback locale with an + * ASCII charset. But for some reason the compose.dir points the C + * locale to the iso8859-1/Compose file, which is not ASCII but + * ISO8859-1. Since this is bound to happen a lot, and since our API + * is UTF-8 based, and since 99% of the time a C locale is really just + * a misconfiguration for UTF-8, let's do the most helpful thing. + */ + if (streq(locale, "C")) + locale = "en_US.UTF-8"; + + resolved = resolve_name("compose.dir", RIGHT_TO_LEFT, locale); + if (!resolved) + return NULL; + + if (resolved[0] == '/') { + path = resolved; + } + else { + xlocaledir = get_xlocaledir_path(); + ret = asprintf(&path, "%s/%s", xlocaledir, resolved); + free(resolved); + if (ret < 0) + return NULL; + } + + return path; +} |