diff options
Diffstat (limited to 'src/System.Private.CoreLib/shared/System/Globalization/CharUnicodeInfo.cs')
| -rw-r--r-- | src/System.Private.CoreLib/shared/System/Globalization/CharUnicodeInfo.cs | 63 |
1 files changed, 48 insertions, 15 deletions
diff --git a/src/System.Private.CoreLib/shared/System/Globalization/CharUnicodeInfo.cs b/src/System.Private.CoreLib/shared/System/Globalization/CharUnicodeInfo.cs index 0cd8429bb..d8d621cb0 100644 --- a/src/System.Private.CoreLib/shared/System/Globalization/CharUnicodeInfo.cs +++ b/src/System.Private.CoreLib/shared/System/Globalization/CharUnicodeInfo.cs @@ -13,6 +13,7 @@ //////////////////////////////////////////////////////////////////////////// using System.Diagnostics; +using System.Text; namespace System.Globalization { @@ -29,6 +30,7 @@ namespace System.Globalization internal const char HIGH_SURROGATE_END = '\udbff'; internal const char LOW_SURROGATE_START = '\udc00'; internal const char LOW_SURROGATE_END = '\udfff'; + internal const int HIGH_SURROGATE_RANGE = 0x3FF; internal const int UNICODE_CATEGORY_OFFSET = 0; internal const int BIDI_CATEGORY_OFFSET = 1; @@ -41,7 +43,7 @@ namespace System.Globalization // // Actions: // Convert the BMP character or surrogate pointed by index to a UTF32 value. - // This is similar to Char.ConvertToUTF32, but the difference is that + // This is similar to char.ConvertToUTF32, but the difference is that // it does not throw exceptions when invalid surrogate characters are passed in. // // WARNING: since it doesn't throw an exception it CAN return a value @@ -49,17 +51,17 @@ namespace System.Globalization // //////////////////////////////////////////////////////////////////////// - internal static int InternalConvertToUtf32(String s, int index) + internal static int InternalConvertToUtf32(string s, int index) { Debug.Assert(s != null, "s != null"); Debug.Assert(index >= 0 && index < s.Length, "index < s.Length"); if (index < s.Length - 1) { int temp1 = (int)s[index] - HIGH_SURROGATE_START; - if (temp1 >= 0 && temp1 <= 0x3ff) + if (temp1 >= 0 && temp1 <= HIGH_SURROGATE_RANGE) { int temp2 = (int)s[index + 1] - LOW_SURROGATE_START; - if (temp2 >= 0 && temp2 <= 0x3ff) + if (temp2 >= 0 && temp2 <= HIGH_SURROGATE_RANGE) { // Convert the surrogate to UTF32 and get the result. return ((temp1 * 0x400) + temp2 + UNICODE_PLANE01_START); @@ -68,6 +70,29 @@ namespace System.Globalization } return ((int)s[index]); } + + internal static int InternalConvertToUtf32(StringBuilder s, int index) + { + Debug.Assert(s != null, "s != null"); + Debug.Assert(index >= 0 && index < s.Length, "index < s.Length"); + + int c = (int)s[index]; + if (index < s.Length - 1) + { + int temp1 = c - HIGH_SURROGATE_START; + if (temp1 >= 0 && temp1 <= HIGH_SURROGATE_RANGE) + { + int temp2 = (int)s[index + 1] - LOW_SURROGATE_START; + if (temp2 >= 0 && temp2 <= HIGH_SURROGATE_RANGE) + { + // Convert the surrogate to UTF32 and get the result. + return ((temp1 * 0x400) + temp2 + UNICODE_PLANE01_START); + } + } + } + return c; + } + //////////////////////////////////////////////////////////////////////// // // Convert a character or a surrogate pair starting at index of string s @@ -90,7 +115,7 @@ namespace System.Globalization // //////////////////////////////////////////////////////////////////////// - internal static int InternalConvertToUtf32(String s, int index, out int charLength) + internal static int InternalConvertToUtf32(string s, int index, out int charLength) { Debug.Assert(s != null, "s != null"); Debug.Assert(s.Length > 0, "s.Length > 0"); @@ -99,10 +124,10 @@ namespace System.Globalization if (index < s.Length - 1) { int temp1 = (int)s[index] - HIGH_SURROGATE_START; - if (temp1 >= 0 && temp1 <= 0x3ff) + if (temp1 >= 0 && temp1 <= HIGH_SURROGATE_RANGE) { int temp2 = (int)s[index + 1] - LOW_SURROGATE_START; - if (temp2 >= 0 && temp2 <= 0x3ff) + if (temp2 >= 0 && temp2 <= HIGH_SURROGATE_RANGE) { // Convert the surrogate to UTF32 and get the result. charLength++; @@ -121,7 +146,7 @@ namespace System.Globalization // //////////////////////////////////////////////////////////////////////// - internal static bool IsWhiteSpace(String s, int index) + internal static bool IsWhiteSpace(string s, int index) { Debug.Assert(s != null, "s!=null"); Debug.Assert(index >= 0 && index < s.Length, "index >= 0 && index < s.Length"); @@ -221,7 +246,7 @@ namespace System.Globalization } - public static double GetNumericValue(String s, int index) + public static double GetNumericValue(string s, int index) { if (s == null) { @@ -239,7 +264,7 @@ namespace System.Globalization return (sbyte)(InternalGetDigitValues(ch) >> 8); } - public static int GetDecimalDigitValue(String s, int index) + public static int GetDecimalDigitValue(string s, int index) { if (s == null) { @@ -259,7 +284,7 @@ namespace System.Globalization return (sbyte)(InternalGetDigitValues(ch) & 0x00FF); } - public static int GetDigitValue(String s, int index) + public static int GetDigitValue(string s, int index) { if (s == null) { @@ -279,7 +304,7 @@ namespace System.Globalization return (GetUnicodeCategory((int)ch)); } - public static UnicodeCategory GetUnicodeCategory(String s, int index) + public static UnicodeCategory GetUnicodeCategory(string s, int index) { if (s == null) throw new ArgumentNullException(nameof(s)); @@ -347,7 +372,7 @@ namespace System.Globalization // //////////////////////////////////////////////////////////////////////// - internal static UnicodeCategory InternalGetUnicodeCategory(String value, int index) + internal static UnicodeCategory InternalGetUnicodeCategory(string value, int index) { Debug.Assert(value != null, "value can not be null"); Debug.Assert(index < value.Length, "index < value.Length"); @@ -355,7 +380,7 @@ namespace System.Globalization return (GetUnicodeCategory(InternalConvertToUtf32(value, index))); } - internal static BidiCategory GetBidiCategory(String s, int index) + internal static BidiCategory GetBidiCategory(string s, int index) { if (s == null) throw new ArgumentNullException(nameof(s)); @@ -368,6 +393,14 @@ namespace System.Globalization return ((BidiCategory) InternalGetCategoryValue(InternalConvertToUtf32(s, index), BIDI_CATEGORY_OFFSET)); } + internal static BidiCategory GetBidiCategory(StringBuilder s, int index) + { + Debug.Assert(s != null, "s can not be null"); + Debug.Assert(index >= 0 && index < s.Length, "invalid index"); ; + + return ((BidiCategory) InternalGetCategoryValue(InternalConvertToUtf32(s, index), BIDI_CATEGORY_OFFSET)); + } + //////////////////////////////////////////////////////////////////////// // // Get the Unicode category of the character starting at index. If the character is in BMP, charLength will return 1. @@ -375,7 +408,7 @@ namespace System.Globalization // //////////////////////////////////////////////////////////////////////// - internal static UnicodeCategory InternalGetUnicodeCategory(String str, int index, out int charLength) + internal static UnicodeCategory InternalGetUnicodeCategory(string str, int index, out int charLength) { Debug.Assert(str != null, "str can not be null"); Debug.Assert(str.Length > 0, "str.Length > 0"); ; |