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codepage: replace iconv with bundled WindowsBestFit tables

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mt_codepage implements code pages 874/932/936/949/950/1250-1258 from
Microsoft's bestfit<cp>.txt sources (script/gen_codepage_tables.py,
SHA-256 pinned). Win32Crt's MultiByteToWideChar/WideCharToMultiByte/
IsDBCSLeadByteEx and net/text_codec use it, so the Android API 24 build
no longer depends on iconv. port.codepage checks every table against
its source file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
shenlei
2026-09-28 18:45:49 +09:00
co-authored by Claude Opus 5.5
parent 07c101fdc8
commit 0b701d88c3
12 changed files with 7068 additions and 191 deletions
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extension/src/port/common/Win32Crt.h
+2 -2
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@@ -104,8 +104,8 @@ void DeleteCriticalSection(LPCRITICAL_SECTION cs);
void EnterCriticalSection(LPCRITICAL_SECTION cs);
void LeaveCriticalSection(LPCRITICAL_SECTION cs);
// stringapiset.h. WCHAR is 32-bit here, so wide strings hold UTF-32 code points. CP_UTF8 and
// CP_ACP/1252 are converted directly; other code pages go through iconv where the platform has it.
// stringapiset.h. WCHAR is 32-bit here, so wide strings hold UTF-32 code points. CP_UTF8 is converted
// directly; CP_ACP (= 1252) and the other ANSI code pages use Microsoft's tables (codepage/codepage.h).
#define CP_ACP 0
#define CP_UTF8 65001
#define MB_PRECOMPOSED 0x00000001