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https://codeberg.org/dnkl/foot.git
synced 2026-02-05 04:06:08 -05:00
e0227266ca
Fcft no longer uses wchar_t, but plain uint32_t to represent codepoints. Since we do a fair amount of string operations in foot, it still makes sense to use something that actually _is_ a string (or character), rather than an array of uint32_t. For this reason, we switch out all wchar_t usage in foot to char32_t. We also verify, at compile-time, that char32_t used UTF-32 (which is what fcft expects). Unfortunately, there are no string functions for char32_t. To avoid having to re-implement all wcs*() functions, we add a small wrapper layer of c32*() functions. These wrapper functions take char32_t arguments, but then simply call the corresponding wcs*() function. For this to work, wcs*() must _also_ be UTF-32 compatible. We can check for the presence of the __STDC_ISO_10646__ macro. If set, wchar_t is at least 4 bytes and its internal representation is UTF-32. FreeBSD does *not* define this macro, because its internal wchar_t representation depends on the current locale. It _does_ use UTF-32 _if_ the current locale is UTF-8. Since foot enforces UTF-8, we simply need to check if __FreeBSD__ is defined. Other fcft API changes: * fcft_glyph_rasterize() -> fcft_codepoint_rasterize() * font.space_advance has been removed * ‘tags’ have been removed from fcft_grapheme_rasterize() * ‘fcft_log_init()’ removed * ‘fcft_init()’ and ‘fcft_fini()’ must be explicitly called
89 lines
1.5 KiB
C
89 lines
1.5 KiB
C
#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "xmalloc.h"
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#include "debug.h"
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static void *
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check_alloc(void *alloc)
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{
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if (unlikely(alloc == NULL)) {
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FATAL_ERROR(__func__, ENOMEM);
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}
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return alloc;
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}
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void *
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xmalloc(size_t size)
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{
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if (unlikely(size == 0)) {
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size = 1;
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}
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return check_alloc(malloc(size));
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}
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void *
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xcalloc(size_t nmemb, size_t size)
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{
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xassert(size != 0);
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return check_alloc(calloc(likely(nmemb) ? nmemb : 1, size));
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}
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void *
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xrealloc(void *ptr, size_t size)
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{
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void *alloc = realloc(ptr, size);
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return unlikely(size == 0) ? alloc : check_alloc(alloc);
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}
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char *
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xstrdup(const char *str)
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{
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return check_alloc(strdup(str));
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}
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char *
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xstrndup(const char *str, size_t n)
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{
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return check_alloc(strndup(str, n));
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}
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char32_t *
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xc32dup(const char32_t *str)
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{
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return check_alloc(c32dup(str));
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}
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static VPRINTF(2) int
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xvasprintf_(char **strp, const char *format, va_list ap)
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{
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va_list ap2;
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va_copy(ap2, ap);
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int n = vsnprintf(NULL, 0, format, ap2);
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if (unlikely(n < 0)) {
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FATAL_ERROR("vsnprintf", EILSEQ);
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}
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va_end(ap2);
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*strp = xmalloc(n + 1);
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return vsnprintf(*strp, n + 1, format, ap);
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}
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char *
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xvasprintf(const char *format, va_list ap)
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{
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char *str;
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xvasprintf_(&str, format, ap);
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return str;
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}
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char *
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xasprintf(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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char *str = xvasprintf(format, ap);
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va_end(ap);
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return str;
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}
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