numCharactersIfValid overloads

Synopses

Declared in <bdlde_utf8util.h>

Return the number of Unicode code points in the specified string if it contains valid UTF‐8, with no effect on the specified invalidString. Otherwise, return a negative value and load into invalidString the address of the byte after the last valid Unicode code point traversed. string is necessarily null‐terminated, so it cannot contain embedded null bytes. Note that string may contain less than bsl::strlen(string) Unicode code points.

static
Utf8Util::IntPtr
numCharactersIfValid(
    char const** invalidString,
    char const* string);

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Return the number of Unicode code points in the specified string having the specified length (in bytes) if string contains valid UTF‐8, with no effect on the specified invalidString. Otherwise, return a negative value and load into invalidString the address of the byte after the last valid Unicode code point traversed. string need not be null‐terminated and may contain embedded null bytes, and string may be null if 0 == length (see {Empty Input Strings}). Note that string may contain less than length Unicode code points.

static
Utf8Util::IntPtr
numCharactersIfValid(
    char const** invalidString,
    char const* string,
    size_type length);

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