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COMMON: Add string size computation to Encoding.

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This commit is contained in:
Jaromir Wysoglad 2019-09-05 02:51:10 +02:00 committed by Thierry Crozat
parent a9be9c1453
commit 8f930126e7
2 changed files with 28 additions and 0 deletions
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16
common/encoding.cpp
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@ -499,4 +499,20 @@ uint32 *Encoding::transliterateUTF32(const uint32 *string, size_t length) {
return result;
}
size_t Encoding::stringLength(const char *string, const String &encoding) {
if (encoding.hasPrefixIgnoreCase("UTF-16")) {
const uint16 *i = (const uint16 *) string;
for (;*i != 0; i++) {}
return (const char *) i - string;
} else if (encoding.hasPrefixIgnoreCase("UTF-32")) {
const uint32 *i = (const uint32 *) string;
for (;*i != 0; i++) {}
return (const char *) i - string;
} else {
const char *i = string;
for (;*i != 0; i++) {}
return i - string;
}
}
}

12
common/encoding.h
View File

@ -108,6 +108,18 @@ class Encoding {
* @return Array of characters with the opposite endianity
*/
static char *switchEndian(const char *string, int length, int bitCount);
/**
* Computes length (in bytes) of a string in a given encoding.
* The string must be zero ended. Similar to strlen
* (could be used instead of strlen).
*
* @param string String, which size should be computed.
* @param encoding Encoding of the string.
*
* @return Size of the string in bytes.
*/
static size_t stringLength(const char *string, const String &encoding);
private:
/** The encoding, which is currently being converted to */