|
| 1 | +#include <stdio.h> |
| 2 | +#include <stdlib.h> |
| 3 | +#include <string.h> |
| 4 | +#include <stdint.h> |
| 5 | +#include <ctype.h> |
| 6 | + |
| 7 | +#include "defines.h" /* SDCARD_PATH, MAX_PATH */ |
| 8 | +#include "i18n.h" |
| 9 | + |
| 10 | +#define I18N_BUCKETS 4096 |
| 11 | +#define I18N_ARENA_SIZE (256 * 1024) |
| 12 | +#define I18N_LINE_MAX 1024 |
| 13 | + |
| 14 | +typedef struct { |
| 15 | + uint32_t hash; |
| 16 | + const char *key; |
| 17 | + const char *value; |
| 18 | +} i18n_entry; |
| 19 | + |
| 20 | +static i18n_entry s_table[I18N_BUCKETS]; |
| 21 | +static char s_arena[I18N_ARENA_SIZE]; |
| 22 | +static size_t s_arena_used; |
| 23 | +static char s_active_code[I18N_LANG_CODE_MAX]; |
| 24 | +static int s_inited; |
| 25 | + |
| 26 | +static uint32_t fnv1a(const char *s) { |
| 27 | + uint32_t h = 0x811c9dc5u; |
| 28 | + while (*s) { |
| 29 | + h ^= (uint8_t)*s++; |
| 30 | + h *= 0x01000193u; |
| 31 | + } |
| 32 | + return h; |
| 33 | +} |
| 34 | + |
| 35 | +static const char *arena_dup(const char *s, size_t len) { |
| 36 | + if (s_arena_used + len + 1 > I18N_ARENA_SIZE) return NULL; |
| 37 | + char *p = s_arena + s_arena_used; |
| 38 | + memcpy(p, s, len); |
| 39 | + p[len] = '\0'; |
| 40 | + s_arena_used += len + 1; |
| 41 | + return p; |
| 42 | +} |
| 43 | + |
| 44 | +static void table_clear(void) { |
| 45 | + memset(s_table, 0, sizeof(s_table)); |
| 46 | + s_arena_used = 0; |
| 47 | +} |
| 48 | + |
| 49 | +static int table_insert(const char *key, size_t klen, const char *val, size_t vlen) { |
| 50 | + char keybuf[256]; |
| 51 | + if (klen >= sizeof(keybuf)) return 0; |
| 52 | + memcpy(keybuf, key, klen); |
| 53 | + keybuf[klen] = '\0'; |
| 54 | + |
| 55 | + uint32_t h = fnv1a(keybuf); |
| 56 | + if (h == 0) h = 1; |
| 57 | + |
| 58 | + size_t mask = I18N_BUCKETS - 1; |
| 59 | + size_t i = h & mask; |
| 60 | + for (size_t probe = 0; probe < I18N_BUCKETS; ++probe) { |
| 61 | + i18n_entry *e = &s_table[i]; |
| 62 | + if (e->hash == 0) { |
| 63 | + const char *dk = arena_dup(key, klen); |
| 64 | + const char *dv = arena_dup(val, vlen); |
| 65 | + if (!dk || !dv) return 0; |
| 66 | + e->hash = h; |
| 67 | + e->key = dk; |
| 68 | + e->value = dv; |
| 69 | + return 1; |
| 70 | + } |
| 71 | + if (e->hash == h && strcmp(e->key, keybuf) == 0) { |
| 72 | + const char *dv = arena_dup(val, vlen); |
| 73 | + if (!dv) return 0; |
| 74 | + e->value = dv; |
| 75 | + return 1; |
| 76 | + } |
| 77 | + i = (i + 1) & mask; |
| 78 | + } |
| 79 | + return 0; |
| 80 | +} |
| 81 | + |
| 82 | +static void strip_trailing_ws(char *s, size_t *len) { |
| 83 | + while (*len > 0 && (s[*len - 1] == ' ' || s[*len - 1] == '\t' || |
| 84 | + s[*len - 1] == '\r' || s[*len - 1] == '\n')) { |
| 85 | + s[--(*len)] = '\0'; |
| 86 | + } |
| 87 | +} |
| 88 | + |
| 89 | +static int parse_file(const char *path) { |
| 90 | + FILE *f = fopen(path, "r"); |
| 91 | + if (!f) return 0; |
| 92 | + |
| 93 | + char line[I18N_LINE_MAX]; |
| 94 | + while (fgets(line, sizeof(line), f)) { |
| 95 | + char *p = line; |
| 96 | + while (*p == ' ' || *p == '\t') ++p; |
| 97 | + if (*p == '\0' || *p == '#' || *p == '\n' || *p == '\r') continue; |
| 98 | + |
| 99 | + char *eq = strchr(p, '='); |
| 100 | + if (!eq) continue; |
| 101 | + |
| 102 | + size_t klen = (size_t)(eq - p); |
| 103 | + while (klen > 0 && (p[klen - 1] == ' ' || p[klen - 1] == '\t')) --klen; |
| 104 | + if (klen == 0) continue; |
| 105 | + |
| 106 | + char *v = eq + 1; |
| 107 | + while (*v == ' ' || *v == '\t') ++v; |
| 108 | + |
| 109 | + size_t vlen = strlen(v); |
| 110 | + strip_trailing_ws(v, &vlen); |
| 111 | + |
| 112 | + table_insert(p, klen, v, vlen); |
| 113 | + } |
| 114 | + fclose(f); |
| 115 | + return 1; |
| 116 | +} |
| 117 | + |
| 118 | +static int load_lang(const char *lang_code) { |
| 119 | + table_clear(); |
| 120 | + |
| 121 | + char path[MAX_PATH]; |
| 122 | + snprintf(path, sizeof(path), "%s/en.lang", SDCARD_PATH I18N_LANG_DIR); |
| 123 | + parse_file(path); |
| 124 | + |
| 125 | + if (lang_code && *lang_code && strcmp(lang_code, "en") != 0) { |
| 126 | + snprintf(path, sizeof(path), "%s/%s.lang", |
| 127 | + SDCARD_PATH I18N_LANG_DIR, lang_code); |
| 128 | + parse_file(path); |
| 129 | + } |
| 130 | + |
| 131 | + strncpy(s_active_code, (lang_code && *lang_code) ? lang_code : "en", |
| 132 | + sizeof(s_active_code) - 1); |
| 133 | + s_active_code[sizeof(s_active_code) - 1] = '\0'; |
| 134 | + return 1; |
| 135 | +} |
| 136 | + |
| 137 | +void I18N_init(const char *lang_code) { |
| 138 | + if (s_inited) return; |
| 139 | + s_inited = 1; |
| 140 | + load_lang(lang_code); |
| 141 | +} |
| 142 | + |
| 143 | +int I18N_reload(const char *lang_code) { |
| 144 | + return load_lang(lang_code); |
| 145 | +} |
| 146 | + |
| 147 | +void I18N_quit(void) { |
| 148 | + table_clear(); |
| 149 | + s_active_code[0] = '\0'; |
| 150 | + s_inited = 0; |
| 151 | +} |
| 152 | + |
| 153 | +char *I18N_t(const char *key) { |
| 154 | + static char empty[1] = { '\0' }; |
| 155 | + if (!key) return empty; |
| 156 | + if (!s_inited) return (char *)key; |
| 157 | + |
| 158 | + uint32_t h = fnv1a(key); |
| 159 | + if (h == 0) h = 1; |
| 160 | + |
| 161 | + size_t mask = I18N_BUCKETS - 1; |
| 162 | + size_t i = h & mask; |
| 163 | + for (size_t probe = 0; probe < I18N_BUCKETS; ++probe) { |
| 164 | + i18n_entry *e = &s_table[i]; |
| 165 | + if (e->hash == 0) return (char *)key; |
| 166 | + if (e->hash == h && strcmp(e->key, key) == 0) return (char *)e->value; |
| 167 | + i = (i + 1) & mask; |
| 168 | + } |
| 169 | + return (char *)key; |
| 170 | +} |
| 171 | + |
| 172 | +const char *I18N_active_code(void) { |
| 173 | + return s_active_code[0] ? s_active_code : "en"; |
| 174 | +} |
0 commit comments