144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* string.c: Define an i3String type to automagically handle UTF-8/UCS-2
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* conversions. Some font backends need UCS-2 (X core fonts),
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* others want UTF-8 (Pango).
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "libi3.h"
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struct _i3String {
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char *utf8;
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xcb_char2b_t *ucs2;
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size_t num_glyphs;
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size_t num_bytes;
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};
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/*
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* Build an i3String from an UTF-8 encoded string.
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* Returns the newly-allocated i3String.
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*
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*/
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i3String *i3string_from_utf8(const char *from_utf8) {
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i3String *str = scalloc(sizeof(i3String));
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/* Get the text */
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str->utf8 = sstrdup(from_utf8);
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/* Compute and store the length */
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str->num_bytes = strlen(str->utf8);
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return str;
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}
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/*
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* Build an i3String from an UTF-8 encoded string with fixed length.
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* To be used when no proper NUL-terminaison is available.
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* Returns the newly-allocated i3String.
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*
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*/
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i3String *i3string_from_utf8_with_length(const char *from_utf8, size_t num_bytes) {
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i3String *str = scalloc(sizeof(i3String));
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/* Copy the actual text to our i3String */
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str->utf8 = scalloc(sizeof(char) * (num_bytes + 1));
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strncpy(str->utf8, from_utf8, num_bytes);
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str->utf8[num_bytes] = '\0';
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/* Store the length */
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str->num_bytes = num_bytes;
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return str;
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}
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/*
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* Build an i3String from an UCS-2 encoded string.
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* Returns the newly-allocated i3String.
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*
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*/
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i3String *i3string_from_ucs2(const xcb_char2b_t *from_ucs2, size_t num_glyphs) {
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i3String *str = scalloc(sizeof(i3String));
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/* Copy the actual text to our i3String */
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size_t num_bytes = num_glyphs * sizeof(xcb_char2b_t);
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str->ucs2 = scalloc(num_bytes);
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memcpy(str->ucs2, from_ucs2, num_bytes);
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/* Store the length */
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str->num_glyphs = num_glyphs;
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str->utf8 = NULL;
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str->num_bytes = 0;
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return str;
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}
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/*
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* Free an i3String.
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*
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*/
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void i3string_free(i3String *str) {
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if (str == NULL)
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return;
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free(str->utf8);
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free(str->ucs2);
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free(str);
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}
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static void i3string_ensure_utf8(i3String *str) {
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if (str->utf8 != NULL)
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return;
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if ((str->utf8 = convert_ucs2_to_utf8(str->ucs2, str->num_glyphs)) != NULL)
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str->num_bytes = strlen(str->utf8);
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}
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static void i3string_ensure_ucs2(i3String *str) {
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if (str->ucs2 != NULL)
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return;
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str->ucs2 = convert_utf8_to_ucs2(str->utf8, &str->num_glyphs);
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}
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/*
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* Returns the UTF-8 encoded version of the i3String.
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*
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*/
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const char *i3string_as_utf8(i3String *str) {
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i3string_ensure_utf8(str);
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return str->utf8;
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}
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/*
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* Returns the UCS-2 encoded version of the i3String.
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*
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*/
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const xcb_char2b_t *i3string_as_ucs2(i3String *str) {
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i3string_ensure_ucs2(str);
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return str->ucs2;
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}
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/*
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* Returns the number of bytes (UTF-8 encoded) in an i3String.
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*
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*/
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size_t i3string_get_num_bytes(i3String *str) {
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i3string_ensure_utf8(str);
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return str->num_bytes;
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}
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/*
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* Returns the number of glyphs in an i3String.
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*
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*/
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size_t i3string_get_num_glyphs(i3String *str) {
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i3string_ensure_ucs2(str);
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return str->num_glyphs;
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}
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