2 * shl - Miscellaneous small helpers
4 * Copyright (c) 2011-2012 David Herrmann <dh.herrmann@googlemail.com>
5 * Copyright (c) 2011 University of Tuebingen
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files
9 * (the "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sublicense, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
22 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Miscellaneous helpers
44 #include <xkbcommon/xkbcommon.h>
46 #define SHL_EXPORT __attribute__((visibility("default")))
47 #define SHL_HAS_BITS(_bitmask, _bits) (((_bitmask) & (_bits)) == (_bits))
48 #define SHL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
49 #define SHL_ULONG_BITS (sizeof(unsigned long) * 8)
51 static inline int shl_dirent(const char *path, struct dirent **ent)
57 /* errno may be left unchanged, see pathconf(3p) */
59 name_max = pathconf(path, _PC_NAME_MAX);
67 len = offsetof(struct dirent, d_name) + name_max + 1;
76 static inline int shl_strtou(const char *input, unsigned int *output)
82 if (!input || !*input)
86 val = strtoul(input, &tmp, 0);
89 if (!tmp || *tmp || errno || (unsigned long)res != val)
97 static inline int shl_dup(void **out, const void *data, size_t size)
108 memcpy(cpy, data, size);
113 static inline bool shl_ends_with(const char *str, const char *suffix)
118 slen = strlen(suffix);
123 return !memcmp(str + len - slen, suffix, slen);
126 static inline unsigned long shl_next_pow2(unsigned long num)
134 for (i = 1; i < sizeof(unsigned long) * CHAR_BIT; i <<= 1)
135 num = num | num >> i;
140 /* This parses \arg and splits the string into a new allocated array. The array
141 * is stored in \out and is NULL terminated. Empty entries are removed from the
142 * array if \keep_empty is false. \out_num is the number of entries in the
143 * array. You can set it to NULL to not retrieve this value.
144 * \sep is the separator character which must be a valid ASCII character,
145 * otherwise this will not be UTF8 safe. */
146 static inline int shl_split_string(const char *arg, char ***out,
147 unsigned int *out_num, char sep,
151 unsigned int num, len, size, pos;
154 if (!arg || !out || !sep)
160 for (i = 0; arg[i]; ++i) {
166 if (keep_empty || len) {
173 if (len > 0 || (keep_empty && (!i || arg[i - 1] == sep))) {
178 list = malloc(sizeof(char*) * (num + 1) + size);
182 off = (void*)(((char*)list) + (sizeof(char*) * (num + 1)));
184 for (pos = 0; pos < num; ) {
186 while (arg[i] && arg[i] != sep)
190 if (list[pos] == off && !keep_empty)
203 static inline int shl_dup_array_size(char ***out, char **argv, size_t len)
206 unsigned int size, i;
212 for (i = 0; i < len; ++i) {
215 size += strlen(argv[i]);
219 size += i * sizeof(char*);
226 off = (char*)t + i * sizeof(char*);
229 for (i = 0; *argv && argv[0][i]; ++i)
239 static inline int shl_dup_array(char ***out, char **argv)
246 for (i = 0; argv[i]; ++i)
249 return shl_dup_array_size(out, argv, i);
252 /* returns true if the string-list contains only a single entry \entry */
253 static inline bool shl_string_list_is(char **list, const char *entry)
257 if (!list[0] || list[1])
259 return !strcmp(list[0], entry);
262 static inline unsigned int shl_string_list_count(char **list, bool ignore_empty)
269 for (num = 0; *list; ++list)
270 if (**list || !ignore_empty)
276 /* reads a whole file into a buffer with 0-termination */
277 static inline int shl_read_file(const char *path, char **out, size_t *size)
289 ffile = fopen(path, "rb");
293 if (fseek(ffile, 0, SEEK_END) != 0) {
306 buf = malloc(len + 1);
313 if (len && len != fread(buf, 1, len, ffile)) {
314 ret = errno ? -errno : -EFAULT;
332 /* TODO: xkbcommon should provide these flags!
333 * We currently copy them into each library API we use so we need to keep
334 * them in sync. Currently, they're used in uterm-input and tsm-vte. */
336 SHL_SHIFT_MASK = (1 << 0),
337 SHL_LOCK_MASK = (1 << 1),
338 SHL_CONTROL_MASK = (1 << 2),
339 SHL_ALT_MASK = (1 << 3),
340 SHL_LOGO_MASK = (1 << 4),
343 static inline unsigned int shl_get_xkb_mods(struct xkb_state *state)
345 unsigned int mods = 0;
347 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_SHIFT,
348 XKB_STATE_MODS_EFFECTIVE) > 0)
349 mods |= SHL_SHIFT_MASK;
350 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CAPS,
351 XKB_STATE_MODS_EFFECTIVE) > 0)
352 mods |= SHL_LOCK_MASK;
353 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CTRL,
354 XKB_STATE_MODS_EFFECTIVE) > 0)
355 mods |= SHL_CONTROL_MASK;
356 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_ALT,
357 XKB_STATE_MODS_EFFECTIVE) > 0)
358 mods |= SHL_ALT_MASK;
359 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_LOGO,
360 XKB_STATE_MODS_EFFECTIVE) > 0)
361 mods |= SHL_LOGO_MASK;
366 static inline uint32_t shl_get_ascii(struct xkb_state *state, uint32_t keycode,
367 const uint32_t *keysyms,
368 unsigned int num_keysyms)
370 struct xkb_keymap *keymap;
371 xkb_layout_index_t num_layouts;
372 xkb_layout_index_t layout;
373 xkb_level_index_t level;
374 const xkb_keysym_t *syms;
377 if (num_keysyms == 1 && keysyms[0] < 128)
380 keymap = xkb_state_get_keymap(state);
381 num_layouts = xkb_keymap_num_layouts_for_key(keymap, keycode);
383 for (layout = 0; layout < num_layouts; layout++) {
384 level = xkb_state_key_get_level(state, keycode, layout);
385 num_syms = xkb_keymap_key_get_syms_by_level(keymap, keycode,
386 layout, level, &syms);
394 return XKB_KEY_NoSymbol;
397 static inline bool shl_grab_matches(unsigned int ev_mods,
398 unsigned int ev_num_syms,
399 const uint32_t *ev_syms,
400 unsigned int grab_mods,
401 unsigned int grab_num_syms,
402 const uint32_t *grab_syms)
404 if (!SHL_HAS_BITS(ev_mods, grab_mods))
407 if (grab_num_syms != 0) {
408 if (ev_num_syms != grab_num_syms)
410 if (memcmp(ev_syms, grab_syms, sizeof(uint32_t) * ev_num_syms))
417 static inline bool shl_grab_has_match(unsigned int ev_mods,
418 unsigned int ev_num_syms,
419 const uint32_t *ev_syms,
420 unsigned int grab_num,
421 const unsigned int *grab_mods,
422 const unsigned int *grab_num_syms,
423 uint32_t **grab_syms)
427 for (i = 0; i < grab_num; ++i) {
428 if (shl_grab_matches(ev_mods, ev_num_syms, ev_syms,
429 grab_mods[i], grab_num_syms[i],
437 #endif /* SHL_MISC_H */