diff options
Diffstat (limited to 'lib/Basic/ConvertUTF.c')
| -rw-r--r-- | lib/Basic/ConvertUTF.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/lib/Basic/ConvertUTF.c b/lib/Basic/ConvertUTF.c index b3fa916934..e1970039e1 100644 --- a/lib/Basic/ConvertUTF.c +++ b/lib/Basic/ConvertUTF.c @@ -387,7 +387,7 @@ static Boolean isLegalUTF8(const UTF8 *source, int length) { */ Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd) { int length = trailingBytesForUTF8[*source]+1; - if (source+length > sourceEnd) { + if (length > sourceEnd - source) { return false; } return isLegalUTF8(source, length); @@ -395,6 +395,22 @@ Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd) { /* --------------------------------------------------------------------- */ +/* + * Exported function to return whether a UTF-8 string is legal or not. + * This is not used here; it's just exported. + */ +Boolean isLegalUTF8String(const UTF8 *source, const UTF8 *sourceEnd) { + while (source != sourceEnd) { + int length = trailingBytesForUTF8[*source] + 1; + if (length > sourceEnd - source || !isLegalUTF8(source, length)) + return false; + source += length; + } + return true; +} + +/* --------------------------------------------------------------------- */ + ConversionResult ConvertUTF8toUTF16 ( const UTF8** sourceStart, const UTF8* sourceEnd, UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) { @@ -404,7 +420,7 @@ ConversionResult ConvertUTF8toUTF16 ( while (source < sourceEnd) { UTF32 ch = 0; unsigned short extraBytesToRead = trailingBytesForUTF8[*source]; - if (source + extraBytesToRead >= sourceEnd) { + if (extraBytesToRead >= sourceEnd - source) { result = sourceExhausted; break; } /* Do this check whether lenient or strict */ @@ -477,7 +493,7 @@ ConversionResult ConvertUTF8toUTF32 ( while (source < sourceEnd) { UTF32 ch = 0; unsigned short extraBytesToRead = trailingBytesForUTF8[*source]; - if (source + extraBytesToRead >= sourceEnd) { + if (extraBytesToRead >= sourceEnd - source) { result = sourceExhausted; break; } /* Do this check whether lenient or strict */ |