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new functions prototypes, minor fixes

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* prototypes for UTF-8 ==> wchar16 conversion
* minor fixes
This commit is contained in:
Frank
2025-11-19 17:40:11 +01:00
parent 43ab0dd468
commit 55c9741f01
3 changed files with 34 additions and 9 deletions
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8
wled00/src/font/codepage437.cpp
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@@ -1,8 +1,9 @@
#if defined(WLED_ENABLE_FULL_FONTS)
#include "codepages.h"
#include <string.h>
// translates unicode 2-byte (UTF-16) "code points" into corresponding characters in codepage 347 (IBM PC aka PC-8)
// translates unicode 2-byte (UTF-16) "code points" into corresponding characters in codepage 437 (IBM PC aka PC-8)
// based on a table from https://en.wikipedia.org/wiki/Code_page_437#Character_set
uint16_t wchar16ToCodepage437(uint16_t wideChar) {
@@ -205,7 +206,4 @@ uint16_t wchar16ToCodepage437(uint16_t wideChar) {
}
#endif
#endif

18
wled00/src/font/codepages.h
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@@ -1,5 +1,15 @@
#include <string.h>
#include <stdlib.h>
#ifndef WLED_CODEPAGES_H
#define WLED_CODEPAGES_H
#include <stdlib.h> // needed to get uint16_t definition
// translates unicode 2-byte (UTF-16) "code points" into corresponding characters in codepage 347 (IBM PC aka PC-8)
uint16_t wchar16ToCodepage437(uint16_t wideChar); // codepage437.cpp
// translates unicode UTF-8 "character code" into 2-byte "code point" (reduced UTF-16)
uint16_t unicodeToWchar16(const char* utf8, size_t maxLen); // unicodetool.cpp
// returns a pointer to the next unicode item - can be used to "advance" conversion after unicodeToWchar16()
// return nullptr at end of input
const char* nextUnicode(const char* utf8, size_t maxLen); // unicodetool.cpp
// translates unicode 2-byte (UTF-16) "code point" into corresponding character in codepage 437 (IBM PC aka PC-8)
uint16_t wchar16ToCodepage437(uint16_t wideChar); // codepage437.cpp
#endif

17
wled00/src/font/unicodetool.cpp Normal file
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@@ -0,0 +1,17 @@
#if defined(WLED_ENABLE_FULL_FONTS)
#include "codepages.h"
#include <string.h>
// translates the next unicode UTF-8 item to 2-byte "code points" (reduced UTF-16)
uint16_t unicodeToWchar16(const char* utf8, size_t maxLen) {
// to be implemented
}
// returns a pointer to the next unicode item - can be used to "advance" conversion after unicodeToWchar16()
// return nullptr at end of input
const char* nextUnicode(const char* utf8, size_t maxLen) {
// to be implemented
}
#endif