diff options
Diffstat (limited to 'src/util.c')
| -rw-r--r-- | src/util.c | 45 |
1 files changed, 29 insertions, 16 deletions
@@ -62,24 +62,37 @@ slv2_uri_to_path(const char* uri) return NULL; } -const char* +/** Return the current LANG converted to Turtle (i.e. RFC3066) style. + * For example, if LANG is set to "en_CA.utf-8", this returns "en-ca". + */ +char* slv2_get_lang() { - static char lang[32]; - lang[31] = '\0'; - char* tmp = getenv("LANG"); - if (!tmp) { - lang[0] = '\0'; - } else { - strncpy(lang, tmp, 31); - for (int i = 0; i < 31 && lang[i]; ++i) { - if (lang[i] == '_') { - lang[i] = '-'; - } else if ( !(lang[i] >= 'a' && lang[i] <= 'z') - && !(lang[i] >= 'A' && lang[i] <= 'Z')) { - lang[i] = '\0'; - break; - } + const char* const env_lang = getenv("LANG"); + if (!env_lang || !strcmp(env_lang, "") + || !strcmp(env_lang, "C") || !strcmp(env_lang, "POSIX")) { + return NULL; + } + + const size_t env_lang_len = strlen(env_lang); + char* const lang = malloc(env_lang_len + 1); + for (size_t i = 0; i < env_lang_len + 1; ++i) { + if (env_lang[i] == '_') { + lang[i] = '-'; // Convert _ to - + } else if (env_lang[i] >= 'A' && env_lang[i] <= 'Z') { + lang[i] = env_lang[i] + ('a' - 'A'); // Convert to lowercase + } else if (env_lang[i] >= 'a' && env_lang[i] <= 'z') { + lang[i] = env_lang[i]; // Lowercase letter, copy verbatim + } else if (env_lang[i] >= '0' && env_lang[i] <= '9') { + lang[i] = env_lang[i]; // Digit, copy verbatim + } else if (env_lang[i] == '\0' || env_lang[i] == '.') { + // End, or start of suffix (e.g. en_CA.utf-8), finished + lang[i] = '\0'; + break; + } else { + SLV2_ERRORF("Illegal LANG `%s' ignored\n", env_lang); + free(lang); + return NULL; } } |