d2f8089ecb
shl_dup() duplicates a memory region similar to strdup() but without reading the data length via strlen(). Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/*
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* shl - Miscellaneous small helpers
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*
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* Copyright (c) 2011-2012 David Herrmann <dh.herrmann@googlemail.com>
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* Copyright (c) 2011 University of Tuebingen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Miscellaneous helpers
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*/
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#ifndef SHL_MISC_H
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#define SHL_MISC_H
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#include <errno.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <xkbcommon/xkbcommon.h>
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#define SHL_HAS_BITS(_bitmask, _bits) (((_bitmask) & (_bits)) == (_bits))
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static inline int shl_strtou(const char *input, unsigned int *output)
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{
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unsigned long val;
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unsigned int res;
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char *tmp = NULL;
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if (!input || !*input)
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return -EINVAL;
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errno = 0;
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val = strtoul(input, &tmp, 0);
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res = val;
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if (!tmp || *tmp || errno || (unsigned long)res != val)
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return -EINVAL;
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if (output)
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*output = res;
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return 0;
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}
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static inline int shl_dup(void **out, const void *data, size_t size)
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{
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void *cpy;
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if (!data || !size)
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return -EINVAL;
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cpy = malloc(size);
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if (!cpy)
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return -ENOMEM;
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memcpy(cpy, data, size);
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*out = cpy;
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return 0;
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}
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/* TODO: xkbcommon should provide these flags!
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* We currently copy them into each library API we use so we need to keep
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* them in sync. Currently, they're used in uterm-input and tsm-vte. */
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enum shl_xkb_mods {
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SHL_SHIFT_MASK = (1 << 0),
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SHL_LOCK_MASK = (1 << 1),
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SHL_CONTROL_MASK = (1 << 2),
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SHL_ALT_MASK = (1 << 3),
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SHL_LOGO_MASK = (1 << 4),
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};
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static inline unsigned int shl_get_xkb_mods(struct xkb_state *state)
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{
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unsigned int mods = 0;
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if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_SHIFT,
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XKB_STATE_EFFECTIVE))
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mods |= SHL_SHIFT_MASK;
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if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CAPS,
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XKB_STATE_EFFECTIVE))
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mods |= SHL_LOCK_MASK;
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if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CTRL,
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XKB_STATE_EFFECTIVE))
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mods |= SHL_CONTROL_MASK;
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if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_ALT,
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XKB_STATE_EFFECTIVE))
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mods |= SHL_ALT_MASK;
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if (xkb_state_mod_name_is_active(state, XKB_MOD_NAME_LOGO,
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XKB_STATE_EFFECTIVE))
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mods |= SHL_LOGO_MASK;
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return mods;
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}
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static inline uint32_t shl_get_ascii(struct xkb_state *state, uint32_t keycode,
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const uint32_t *keysyms,
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unsigned int num_keysyms)
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{
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struct xkb_keymap *keymap;
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xkb_layout_index_t num_layouts;
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xkb_layout_index_t layout;
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xkb_level_index_t level;
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const xkb_keysym_t *syms;
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int num_syms;
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if (num_keysyms == 1 && keysyms[0] < 128)
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return keysyms[0];
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keymap = xkb_state_get_map(state);
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num_layouts = xkb_keymap_num_layouts_for_key(keymap, keycode);
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for (layout = 0; layout < num_layouts; layout++) {
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level = xkb_state_key_get_level(state, keycode, layout);
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num_syms = xkb_keymap_key_get_syms_by_level(keymap, keycode,
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layout, level, &syms);
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if (num_syms != 1)
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continue;
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if (syms[0] < 128)
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return syms[0];
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}
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return XKB_KEY_NoSymbol;
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}
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#endif /* SHL_MISC_H */
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