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stdlib: Export some Unicode functions to other SDL internals.

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Ryan C. Gordon 2024-04-04 00:56:07 -04:00
parent 9192485746
commit 810656962c
2 changed files with 40 additions and 4 deletions
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10
src/stdlib/SDL_string.c
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@ -28,6 +28,8 @@
#include <psp2/kernel/clib.h> #include <psp2/kernel/clib.h>
#endif #endif
#include "SDL_sysstdlib.h"
#include "SDL_casefolding.h" #include "SDL_casefolding.h"
// this is the Unicode REPLACEMENT CHARACTER, used for invalid codepoint values. // this is the Unicode REPLACEMENT CHARACTER, used for invalid codepoint values.
@ -44,7 +46,7 @@ SDL_COMPILE_TIME_ASSERT(sizeof_wchar_t, sizeof(wchar_t) == SDL_SIZEOF_WCHAR_T);
// this expects `from` and `to` to be UTF-32 encoding! // this expects `from` and `to` to be UTF-32 encoding!
static int SDL_UnicodeCaseFold(const Uint32 from, Uint32 *to) int SDL_CaseFoldUnicode(const Uint32 from, Uint32 *to)
{ {
// !!! FIXME: since the hashtable is static, maybe we should binary // !!! FIXME: since the hashtable is static, maybe we should binary
// !!! FIXME: search it instead of walking the whole bucket. // !!! FIXME: search it instead of walking the whole bucket.
@ -127,7 +129,7 @@ static int SDL_UnicodeCaseFold(const Uint32 from, Uint32 *to)
cp1 = folded1[tail1++]; \ cp1 = folded1[tail1++]; \
} else { \ } else { \
const Uint##bits *str1start = (const Uint##bits *) str1; \ const Uint##bits *str1start = (const Uint##bits *) str1; \
head1 = SDL_UnicodeCaseFold(SDL_StepUTF##bits(&str1, slen1), folded1); \ head1 = SDL_CaseFoldUnicode(SDL_StepUTF##bits(&str1, slen1), folded1); \
update_slen1; \ update_slen1; \
cp1 = folded1[0]; \ cp1 = folded1[0]; \
tail1 = 1; \ tail1 = 1; \
@ -136,7 +138,7 @@ static int SDL_UnicodeCaseFold(const Uint32 from, Uint32 *to)
cp2 = folded2[tail2++]; \ cp2 = folded2[tail2++]; \
} else { \ } else { \
const Uint##bits *str2start = (const Uint##bits *) str2; \ const Uint##bits *str2start = (const Uint##bits *) str2; \
head2 = SDL_UnicodeCaseFold(SDL_StepUTF##bits(&str2, slen2), folded2); \ head2 = SDL_CaseFoldUnicode(SDL_StepUTF##bits(&str2, slen2), folded2); \
update_slen2; \ update_slen2; \
cp2 = folded2[0]; \ cp2 = folded2[0]; \
tail2 = 1; \ tail2 = 1; \
@ -152,7 +154,7 @@ static int SDL_UnicodeCaseFold(const Uint32 from, Uint32 *to)
return 0 return 0
static Uint32 SDL_StepUTF8(const char **_str, const size_t slen) Uint32 SDL_StepUTF8(const char **_str, const size_t slen)
{ {
const char *str = *_str; const char *str = *_str;
const Uint32 octet = (Uint32) (slen ? ((Uint8) *str) : 0); const Uint32 octet = (Uint32) (slen ? ((Uint8) *str) : 0);

34
src/stdlib/SDL_sysstdlib.h Normal file
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@ -0,0 +1,34 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifndef SDL_sysstdlib_h_
#define SDL_sysstdlib_h_
// most things you might need internally in here are public APIs, this is
// just a few special pieces right now.
Uint32 SDL_StepUTF8(const char **_str, const size_t slen);
// this expects `from` to be a Unicode codepoint, and `to` to point to AT LEAST THREE Uint32s.
int SDL_CaseFoldUnicode(const Uint32 from, Uint32 *to);
#endif