Rokas Kupstys b3576dd354 Replace UTF-8 decoder with branchless version by Christopher Wellons. ...

Decoding performance increase ranges from 30-40%.

Changes:
* Errors handling near the end of string changed. If input does not contain enough bytes, decoder returns `IM_UNICODE_CODEPOINT_INVALID`, consuming all remaining bytes while old decoder consumed only one byte.

Guarantees:
* At least one byte is consumed, if input had at least one byte available.
* Number of consumed bytes will never seek past end of string.

Requirements:
* `in_text` is a valid pointer.
* String pointed by `in_text` must be zero-terminated, or `in_text_end` is not NULL.

2020-10-23 13:10:37 +02:00

521 KiB

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