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
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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 name_max = pathconf(path, _PC_NAME_MAX);
61 len = offsetof(struct dirent, d_name) + name_max + 1;
70 static inline int shl_strtou(const char *input, unsigned int *output)
76 if (!input || !*input)
80 val = strtoul(input, &tmp, 0);
83 if (!tmp || *tmp || errno || (unsigned long)res != val)
91 static inline int shl_dup(void **out, const void *data, size_t size)
102 memcpy(cpy, data, size);
107 static inline bool shl_ends_with(const char *str, const char *suffix)
112 slen = strlen(suffix);
117 return !memcmp(str + len - slen, suffix, slen);
120 static inline unsigned long shl_next_pow2(unsigned long num)
128 for (i = 1; i < sizeof(unsigned long) * CHAR_BIT; i <<= 1)
129 num = num | num >> i;
134 /* This parses \arg and splits the string into a new allocated array. The array
135 * is stored in \out and is NULL terminated. Empty entries are removed from the
136 * array if \keep_empty is false. \out_num is the number of entries in the
137 * array. You can set it to NULL to not retrieve this value.
138 * \sep is the separator character which must be a valid ASCII character,
139 * otherwise this will not be UTF8 safe. */
140 static inline int shl_split_string(const char *arg, char ***out,
141 unsigned int *out_num, char sep,
145 unsigned int num, len, size, pos;
148 if (!arg || !out || !sep)
154 for (i = 0; arg[i]; ++i) {
160 if (keep_empty || len) {
167 if (len > 0 || (keep_empty && (!i || arg[i - 1] == sep))) {
172 list = malloc(sizeof(char*) * (num + 1) + size);
176 off = (void*)(((char*)list) + (sizeof(char*) * (num + 1)));
178 for (pos = 0; pos < num; ) {
180 while (arg[i] && arg[i] != sep)
184 if (list[pos] == off && !keep_empty)
197 static inline int shl_dup_array_size(char ***out, char **argv, size_t len)
200 unsigned int size, i;
206 for (i = 0; i < len; ++i) {
209 size += strlen(argv[i]);
213 size += i * sizeof(char*);
220 off = (char*)t + i * sizeof(char*);
223 for (i = 0; *argv && argv[0][i]; ++i)
233 static inline int shl_dup_array(char ***out, char **argv)
240 for (i = 0; argv[i]; ++i)
243 return shl_dup_array_size(out, argv, i);
246 /* returns true if the string-list contains only a single entry \entry */
247 static inline bool shl_string_list_is(char **list, const char *entry)
251 if (!list[0] || list[1])
253 return !strcmp(list[0], entry);
256 static inline unsigned int shl_string_list_count(char **list, bool ignore_empty)
263 for (num = 0; *list; ++list)
264 if (**list || !ignore_empty)
270 /* reads a whole file into a buffer with 0-termination */
271 static inline int shl_read_file(const char *path, char **out, size_t *size)
283 ffile = fopen(path, "rb");
287 if (fseek(ffile, 0, SEEK_END) != 0) {
300 buf = malloc(len + 1);
307 if (len && len != fread(buf, 1, len, ffile)) {
308 ret = errno ? -errno : -EFAULT;
326 /* TODO: xkbcommon should provide these flags!
327 * We currently copy them into each library API we use so we need to keep
328 * them in sync. Currently, they're used in uterm-input and tsm-vte. */
330 SHL_SHIFT_MASK = (1 << 0),
331 SHL_LOCK_MASK = (1 << 1),
332 SHL_CONTROL_MASK = (1 << 2),
333 SHL_ALT_MASK = (1 << 3),
334 SHL_LOGO_MASK = (1 << 4),
337 static inline unsigned int shl_get_xkb_mods(struct xkb_state *state)
339 unsigned int mods = 0;
341 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_SHIFT,
342 XKB_STATE_MODS_EFFECTIVE) > 0)
343 mods |= SHL_SHIFT_MASK;
344 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CAPS,
345 XKB_STATE_MODS_EFFECTIVE) > 0)
346 mods |= SHL_LOCK_MASK;
347 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CTRL,
348 XKB_STATE_MODS_EFFECTIVE) > 0)
349 mods |= SHL_CONTROL_MASK;
350 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_ALT,
351 XKB_STATE_MODS_EFFECTIVE) > 0)
352 mods |= SHL_ALT_MASK;
353 if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_LOGO,
354 XKB_STATE_MODS_EFFECTIVE) > 0)
355 mods |= SHL_LOGO_MASK;
360 static inline uint32_t shl_get_ascii(struct xkb_state *state, uint32_t keycode,
361 const uint32_t *keysyms,
362 unsigned int num_keysyms)
364 struct xkb_keymap *keymap;
365 xkb_layout_index_t num_layouts;
366 xkb_layout_index_t layout;
367 xkb_level_index_t level;
368 const xkb_keysym_t *syms;
371 if (num_keysyms == 1 && keysyms[0] < 128)
374 keymap = xkb_state_get_keymap(state);
375 num_layouts = xkb_keymap_num_layouts_for_key(keymap, keycode);
377 for (layout = 0; layout < num_layouts; layout++) {
378 level = xkb_state_key_get_level(state, keycode, layout);
379 num_syms = xkb_keymap_key_get_syms_by_level(keymap, keycode,
380 layout, level, &syms);
388 return XKB_KEY_NoSymbol;
391 static inline bool shl_grab_matches(unsigned int ev_mods,
392 unsigned int ev_num_syms,
393 const uint32_t *ev_syms,
394 unsigned int grab_mods,
395 unsigned int grab_num_syms,
396 const uint32_t *grab_syms)
398 if (!SHL_HAS_BITS(ev_mods, grab_mods))
401 if (grab_num_syms != 0) {
402 if (ev_num_syms != grab_num_syms)
404 if (memcmp(ev_syms, grab_syms, sizeof(uint32_t) * ev_num_syms))
411 static inline bool shl_grab_has_match(unsigned int ev_mods,
412 unsigned int ev_num_syms,
413 const uint32_t *ev_syms,
414 unsigned int grab_num,
415 const unsigned int *grab_mods,
416 const unsigned int *grab_num_syms,
417 uint32_t **grab_syms)
421 for (i = 0; i < grab_num; ++i) {
422 if (shl_grab_matches(ev_mods, ev_num_syms, ev_syms,
423 grab_mods[i], grab_num_syms[i],
431 #endif /* SHL_MISC_H */