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using System;
using System.Collections.Generic;
using System.Text;
using System.Globalization;
namespace Google.ProtocolBuffers {
/// <summary>
/// Helpers for converting names to pascal case etc.
/// </summary>
internal class NameHelpers {
internal static string UnderscoresToPascalCase(string input) {
return UnderscoresToPascalOrCamelCase(input, true);
}
internal static string UnderscoresToCamelCase(string input) {
return UnderscoresToPascalOrCamelCase(input, false);
}
/// <summary>
/// Converts a string to Pascal or Camel case. The first letter is capitalized or
/// lower-cased depending on <paramref name="pascal"/> is true.
/// After the first letter, any punctuation is removed but triggers capitalization
/// of the next letter. Digits are preserved but trigger capitalization of the next
/// letter.
/// All capitalisation is done in the invariant culture.
/// </summary>
private static string UnderscoresToPascalOrCamelCase(string input, bool pascal) {
StringBuilder result = new StringBuilder();
bool capitaliseNext = pascal;
for (int i = 0; i < input.Length; i++) {
char c = input[i];
if ('a' <= c && c <= 'z') {
if (capitaliseNext) {
result.Append(char.ToUpper(c, CultureInfo.InvariantCulture));
} else {
result.Append(c);
}
capitaliseNext = false;
} else if ('A' <= c && c <= 'Z') {
if (i == 0 && !pascal) {
// Force first letter to lower-case unless explicitly told to
// capitalize it.
result.Append(char.ToLower(c, CultureInfo.InvariantCulture));
} else {
// Capital letters after the first are left as-is.
result.Append(c);
}
capitaliseNext = false;
} else if ('0' <= c && c <= '9') {
result.Append(c);
capitaliseNext = true;
} else {
capitaliseNext = true;
}
}
return result.ToString();
}
internal static string StripProto(string text) {
if (!StripSuffix(ref text, ".protodevel")) {
StripSuffix(ref text, ".proto");
}
return text;
}
/// <summary>
/// Attempts to strip a suffix from a string, returning whether
/// or not the suffix was actually present.
/// </summary>
internal static bool StripSuffix(ref string text, string suffix) {
if (text.EndsWith(suffix)) {
text = text.Substring(0, text.Length - suffix.Length);
return true;
}
return false;
}
}
}
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