diff options
Diffstat (limited to 'cs/src/Ice/StringUtil.cs')
| -rwxr-xr-x | cs/src/Ice/StringUtil.cs | 718 |
1 files changed, 359 insertions, 359 deletions
diff --git a/cs/src/Ice/StringUtil.cs b/cs/src/Ice/StringUtil.cs index 80377b40761..b5dae389ca8 100755 --- a/cs/src/Ice/StringUtil.cs +++ b/cs/src/Ice/StringUtil.cs @@ -15,381 +15,381 @@ namespace IceUtil public sealed class StringUtil { - // - // Return the index of the first character in str to - // appear in match, starting from 0. Returns -1 if none is - // found. - // - public static int findFirstOf(string str, string match) - { - return findFirstOf(str, match, 0); - } - - // - // Return the index of the first character in str to - // appear in match, starting from start. Returns -1 if none is - // found. - // - public static int findFirstOf(string str, string match, int start) - { - int len = str.Length; - for(int i = start; i < len; i++) - { - char ch = str[i]; - if(match.IndexOf((char) ch) != -1) - { - return i; - } - } - - return -1; - } - - // - // Return the index of the first character in str which does - // not appear in match, starting from 0. Returns -1 if none is - // found. - // - public static int findFirstNotOf(string str, string match) - { - return findFirstNotOf(str, match, 0); - } - - // - // Return the index of the first character in str which does - // not appear in match, starting from start. Returns -1 if none is - // found. - // - public static int findFirstNotOf(string str, string match, int start) - { - int len = str.Length; - for(int i = start; i < len; i++) - { - char ch = str[i]; - if(match.IndexOf((char) ch) == -1) - { - return i; - } - } - - return -1; - } - - // - // Write the byte b as an escape sequence if it isn't a printable ASCII - // character and append the escape sequence to sb. Additional characters - // that should be escaped can be passed in special. If b is any of these - // characters, b is preceded by a backslash in sb. - // - private static void encodeChar(byte b, StringBuilder sb, string special) - { - switch((char)b) - { - case '\\': - { - sb.Append("\\\\"); - break; - } - - case '\'': - { - sb.Append("\\'"); - break; - } - - case '"': - { - sb.Append("\\\""); - break; - } - - case '\b': - { - sb.Append("\\b"); - break; - } - - case '\f': - { - sb.Append("\\f"); - break; - } - - case '\n': - { - sb.Append("\\n"); - break; - } - - case '\r': - { - sb.Append("\\r"); - break; - } - - case '\t': - { - sb.Append("\\t"); - break; - } - - default: - { - if(!(b >= 32 && b <= 126)) - { - sb.Append('\\'); - string octal = System.Convert.ToString(b, 8); - // - // Add leading zeroes so that we avoid problems during - // decoding. For example, consider the encoded string - // \0013 (i.e., a character with value 1 followed by - // the character '3'). If the leading zeroes were omitted, - // the result would be incorrectly interpreted by the - // decoder as a single character with value 11. - // - for(int j = octal.Length; j < 3; j++) - { - sb.Append('0'); - } - sb.Append(octal); - } - else if(special != null && special.IndexOf((char)b) != -1) - { - sb.Append('\\'); - sb.Append((char)b); - } - else - { - sb.Append((char)b); - } - } - break; - } - } - + // + // Return the index of the first character in str to + // appear in match, starting from 0. Returns -1 if none is + // found. + // + public static int findFirstOf(string str, string match) + { + return findFirstOf(str, match, 0); + } + + // + // Return the index of the first character in str to + // appear in match, starting from start. Returns -1 if none is + // found. + // + public static int findFirstOf(string str, string match, int start) + { + int len = str.Length; + for(int i = start; i < len; i++) + { + char ch = str[i]; + if(match.IndexOf((char) ch) != -1) + { + return i; + } + } + + return -1; + } + + // + // Return the index of the first character in str which does + // not appear in match, starting from 0. Returns -1 if none is + // found. + // + public static int findFirstNotOf(string str, string match) + { + return findFirstNotOf(str, match, 0); + } + + // + // Return the index of the first character in str which does + // not appear in match, starting from start. Returns -1 if none is + // found. + // + public static int findFirstNotOf(string str, string match, int start) + { + int len = str.Length; + for(int i = start; i < len; i++) + { + char ch = str[i]; + if(match.IndexOf((char) ch) == -1) + { + return i; + } + } + + return -1; + } + + // + // Write the byte b as an escape sequence if it isn't a printable ASCII + // character and append the escape sequence to sb. Additional characters + // that should be escaped can be passed in special. If b is any of these + // characters, b is preceded by a backslash in sb. + // + private static void encodeChar(byte b, StringBuilder sb, string special) + { + switch((char)b) + { + case '\\': + { + sb.Append("\\\\"); + break; + } + + case '\'': + { + sb.Append("\\'"); + break; + } + + case '"': + { + sb.Append("\\\""); + break; + } + + case '\b': + { + sb.Append("\\b"); + break; + } + + case '\f': + { + sb.Append("\\f"); + break; + } + + case '\n': + { + sb.Append("\\n"); + break; + } + + case '\r': + { + sb.Append("\\r"); + break; + } + + case '\t': + { + sb.Append("\\t"); + break; + } + + default: + { + if(!(b >= 32 && b <= 126)) + { + sb.Append('\\'); + string octal = System.Convert.ToString(b, 8); + // + // Add leading zeroes so that we avoid problems during + // decoding. For example, consider the encoded string + // \0013 (i.e., a character with value 1 followed by + // the character '3'). If the leading zeroes were omitted, + // the result would be incorrectly interpreted by the + // decoder as a single character with value 11. + // + for(int j = octal.Length; j < 3; j++) + { + sb.Append('0'); + } + sb.Append(octal); + } + else if(special != null && special.IndexOf((char)b) != -1) + { + sb.Append('\\'); + sb.Append((char)b); + } + else + { + sb.Append((char)b); + } + } + break; + } + } + // // Add escape sequences (such as "\n", or "\007") to make a string // readable in ASCII. Any characters that appear in special are - // prefixed with a backslash in the returned string. + // prefixed with a backslash in the returned string. // - public static string escapeString(string s, string special) - { - if(special != null) - { - for(int i = 0; i < special.Length; ++i) - { - if((int)special[i] < 32 || (int)special[i] > 126) - { - throw new System.ArgumentException("special characters must be in ASCII range 32-126", "special"); - } - } - } + public static string escapeString(string s, string special) + { + if(special != null) + { + for(int i = 0; i < special.Length; ++i) + { + if((int)special[i] < 32 || (int)special[i] > 126) + { + throw new System.ArgumentException("special characters must be in ASCII range 32-126", "special"); + } + } + } - UTF8Encoding utf8 = new UTF8Encoding(); - byte[] bytes = utf8.GetBytes(s); + UTF8Encoding utf8 = new UTF8Encoding(); + byte[] bytes = utf8.GetBytes(s); - StringBuilder result = new StringBuilder(bytes.Length); - for(int i = 0; i < bytes.Length; i++) - { - encodeChar(bytes[i], result, special); - } - - return result.ToString(); - } - - private static char checkChar(char c) - { - if(!(c >= 32 && c <= 126)) - { - throw new System.ArgumentException("illegal input character"); - } - return c; - } + StringBuilder result = new StringBuilder(bytes.Length); + for(int i = 0; i < bytes.Length; i++) + { + encodeChar(bytes[i], result, special); + } + + return result.ToString(); + } + + private static char checkChar(char c) + { + if(!(c >= 32 && c <= 126)) + { + throw new System.ArgumentException("illegal input character"); + } + return c; + } - // - // Decode the character or escape sequence starting at start and return it. - // end marks the one-past-the-end position of the substring to be scanned. - // nextStart is set to the index of the first character following the decoded - // character or escape sequence. - // - private static char decodeChar(string s, int start, int end, out int nextStart) - { - Debug.Assert(start >= 0); - Debug.Assert(start < end); - Debug.Assert(end <= s.Length); + // + // Decode the character or escape sequence starting at start and return it. + // end marks the one-past-the-end position of the substring to be scanned. + // nextStart is set to the index of the first character following the decoded + // character or escape sequence. + // + private static char decodeChar(string s, int start, int end, out int nextStart) + { + Debug.Assert(start >= 0); + Debug.Assert(start < end); + Debug.Assert(end <= s.Length); - char c; + char c; - if(s[start] != '\\') - { - c = checkChar(s[start++]); - } - else - { - if(start + 1 == end) - { - throw new System.ArgumentException("trailing backslash in argument"); - } - switch(s[++start]) - { - case '\\': - case '\'': - case '"': - { - c = s[start++]; - break; - } - case 'b': - { - ++start; - c = '\b'; - break; - } - case 'f': - { - ++start; - c = '\f'; - break; - } - case 'n': - { - ++start; - c = '\n'; - break; - } - case 'r': - { - ++start; - c = '\r'; - break; - } - case 't': - { - ++start; - c = '\t'; - break; - } - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - { - int oct = 0; - for(int j = 0; j < 3 && start < end; ++j) - { - int charVal = s[start++] - '0'; - if(charVal < 0 || charVal > 7) - { - --start; - break; - } - oct = oct * 8 + charVal; - } - if(oct > 255) - { - throw new System.ArgumentException("octal value out of range", "s"); - } - c = System.Convert.ToChar(oct); - break; - } - default: - { - c = checkChar(s[start++]); - break; - } - } - } - nextStart = start; - return c; - } + if(s[start] != '\\') + { + c = checkChar(s[start++]); + } + else + { + if(start + 1 == end) + { + throw new System.ArgumentException("trailing backslash in argument"); + } + switch(s[++start]) + { + case '\\': + case '\'': + case '"': + { + c = s[start++]; + break; + } + case 'b': + { + ++start; + c = '\b'; + break; + } + case 'f': + { + ++start; + c = '\f'; + break; + } + case 'n': + { + ++start; + c = '\n'; + break; + } + case 'r': + { + ++start; + c = '\r'; + break; + } + case 't': + { + ++start; + c = '\t'; + break; + } + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + { + int oct = 0; + for(int j = 0; j < 3 && start < end; ++j) + { + int charVal = s[start++] - '0'; + if(charVal < 0 || charVal > 7) + { + --start; + break; + } + oct = oct * 8 + charVal; + } + if(oct > 255) + { + throw new System.ArgumentException("octal value out of range", "s"); + } + c = System.Convert.ToChar(oct); + break; + } + default: + { + c = checkChar(s[start++]); + break; + } + } + } + nextStart = start; + return c; + } - // - // Remove escape sequences from s and append the result to sb. - // Return true if successful, false otherwise. - // - private static void decodeString(string s, int start, int end, StringBuilder sb) - { - while(start < end) - { - sb.Append(decodeChar(s, start, end, out start)); - } - } + // + // Remove escape sequences from s and append the result to sb. + // Return true if successful, false otherwise. + // + private static void decodeString(string s, int start, int end, StringBuilder sb) + { + while(start < end) + { + sb.Append(decodeChar(s, start, end, out start)); + } + } // // Remove escape sequences added by escapeString. // - public static bool unescapeString(string s, int start, int end, out string result) - { - if(start < 0) - { - throw new System.ArgumentException("start offset must be >= 0", "start"); - } - if(end > s.Length) - { - throw new System.ArgumentException("end offset must be <= s.Length", "end"); - } - if(start > end) - { - throw new System.ArgumentException("start offset must be <= end offset"); - } - - result = null; - try - { - StringBuilder sb = new StringBuilder(); - decodeString(s, start, end, sb); - string decodedString = sb.ToString(); + public static bool unescapeString(string s, int start, int end, out string result) + { + if(start < 0) + { + throw new System.ArgumentException("start offset must be >= 0", "start"); + } + if(end > s.Length) + { + throw new System.ArgumentException("end offset must be <= s.Length", "end"); + } + if(start > end) + { + throw new System.ArgumentException("start offset must be <= end offset"); + } + + result = null; + try + { + StringBuilder sb = new StringBuilder(); + decodeString(s, start, end, sb); + string decodedString = sb.ToString(); - byte[] arr = new byte[decodedString.Length]; - for(int i = 0; i < arr.Length; ++i) - { - arr[i] = (byte)decodedString[i]; - } + byte[] arr = new byte[decodedString.Length]; + for(int i = 0; i < arr.Length; ++i) + { + arr[i] = (byte)decodedString[i]; + } - UTF8Encoding utf8 = new UTF8Encoding(false, true); - result = utf8.GetString(arr); - return true; - } - catch(System.Exception) - { - return false; - } - } + UTF8Encoding utf8 = new UTF8Encoding(false, true); + result = utf8.GetString(arr); + return true; + } + catch(System.Exception) + { + return false; + } + } - public static int checkQuote(string s) - { - return checkQuote(s, 0); - } - - // - // If a single or double quotation mark is found at the start position, - // then the position of the matching closing quote is returned. If no - // quotation mark is found at the start position, then 0 is returned. - // If no matching closing quote is found, then -1 is returned. - // - public static int checkQuote(string s, int start) - { - char quoteChar = s[start]; - if(quoteChar == '"' || quoteChar == '\'') - { - start++; - int len = s.Length; - int pos; - while(start < len && (pos = s.IndexOf(quoteChar, start)) != -1) - { - if(s[pos - 1] != '\\') - { - return pos; - } - start = pos + 1; - } - return -1; // Unmatched quote - } - return 0; // Not quoted - } + public static int checkQuote(string s) + { + return checkQuote(s, 0); + } + + // + // If a single or double quotation mark is found at the start position, + // then the position of the matching closing quote is returned. If no + // quotation mark is found at the start position, then 0 is returned. + // If no matching closing quote is found, then -1 is returned. + // + public static int checkQuote(string s, int start) + { + char quoteChar = s[start]; + if(quoteChar == '"' || quoteChar == '\'') + { + start++; + int len = s.Length; + int pos; + while(start < len && (pos = s.IndexOf(quoteChar, start)) != -1) + { + if(s[pos - 1] != '\\') + { + return pos; + } + start = pos + 1; + } + return -1; // Unmatched quote + } + return 0; // Not quoted + } } } |