nishi/milsko
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add utf32 function

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git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@239 b9cfdab3-6d41-4d17-bbe4-086880011989
This commit is contained in:
NishiOwO
2025-10-09 10:46:09 +00:00
parent 051e6a8344
commit 59910e65d2
4 changed files with 90 additions and 1 deletions
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2
GNUmakefile
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@@ -26,7 +26,7 @@ L_CFLAGS = $(DEPINC) $(CFLAGS) -fPIC -D_MILSKO
L_LDFLAGS = $(LDFLAGS)
L_LIBS = $(LIBS)
L_OBJS = src/core.o src/default.o src/draw.o src/lowlevel.o src/font.o src/boldfont.o src/error.o
L_OBJS = src/core.o src/default.o src/draw.o src/lowlevel.o src/font.o src/boldfont.o src/error.o src/unicode.o
L_OBJS += src/external/ds.o src/external/image.o
L_OBJS += src/widget/window.o src/widget/button.o src/widget/frame.o src/widget/menu.o src/widget/submenu.o src/widget/image.o src/widget/scrollbar.o src/widget/checkbox.o src/widget/label.o src/widget/entry.o
L_OBJS += src/cursor/default.o src/cursor/cross.o src/cursor/text.o

1
include/Mw/Milsko.h
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@@ -17,6 +17,7 @@
#include <Mw/Error.h>
#include <Mw/Cursor.h>
#include <Mw/Constants.h>
#include <Mw/Unicode.h>
#include <Mw/Widget/Window.h>
#include <Mw/Widget/Menu.h>

28
include/Mw/Unicode.h Normal file
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@@ -0,0 +1,28 @@
/* $Id$ */
/*!
* %file Mw/Unicode.h
* %brief Handles UTF8 stuff
*/
#ifndef __MW_UNICODE_H__
#define __MW_UNICODE_H__
#include <Mw/MachDep.h>
#include <Mw/TypeDefs.h>
#ifdef __cplusplus
extern "C" {
#endif
/*!
* %brief Converts UTF-8 to UTF-32
* %brief input Input
* %brief output Output
* %return Bytes this multibyte takes
*/
MWDECL int MwUTF8ToUTF32(const char* input, int32_t* output);
#ifdef __cplusplus
}
#endif
#endif

60
src/unicode.c Normal file
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@@ -0,0 +1,60 @@
/* $Id$ */
#include <Mw/Milsko.h>
/* this code was taken from my old code... :) */
#define CAST_I32(x) ((int)(x))
static int utf8_count(unsigned char c) {
if(c < 0x80) {
return 1;
}
if(0xc2 <= c && c < 0xe0) {
return 2;
}
if(0xe0 <= c && c < 0xf0) {
return 3;
}
if(0xf0 <= c && c < 0xf8) {
return 4;
}
return 0;
}
static int utf8_later(unsigned char c) {
return 0x80 <= c && c < 0xc0;
}
int MwUTF8ToUTF32(const char* input, int32_t* output) {
const unsigned char* inbuf = (const unsigned char*)input;
int b = utf8_count(inbuf[0]);
if(b == 0) return 0;
if(b == 1) *output = inbuf[0];
if(b == 2) {
if(!utf8_later(inbuf[1])) return 0;
if((inbuf[0] & 0x1e) == 0) return 0;
*output = CAST_I32(inbuf[0] & 0x1f) << 6;
*output |= CAST_I32(inbuf[1] & 0x3f);
}
if(b == 3) {
if(!utf8_later(inbuf[1]) || !utf8_later(inbuf[2])) return 0;
if((inbuf[0] & 0x0f) == 0 && (inbuf[1] & 0x20) == 0) return 0;
*output = CAST_I32(inbuf[0] & 0x0f) << 12;
*output |= CAST_I32(inbuf[1] & 0x3f) << 6;
*output |= CAST_I32(inbuf[2] & 0x3f);
}
if(b == 4) {
if(!utf8_later(inbuf[1]) || !utf8_later(inbuf[2]) || !utf8_later(inbuf[3])) return 0;
if((inbuf[0] & 0x07) == 0 && (inbuf[1] & 0x30) == 0) return 0;
*output = CAST_I32(inbuf[0] & 0x07) << 18;
*output |= CAST_I32(inbuf[1] & 0x3f) << 12;
*output |= CAST_I32(inbuf[2] & 0x3f) << 6;
*output |= CAST_I32(inbuf[3] & 0x3f);
}
return b;
}