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guarantees of u8_mbtouc/u8_strmbtouc (was Re: [PATCH v2 0/5] Speed up uN

From: Paolo Bonzini
Subject: guarantees of u8_mbtouc/u8_strmbtouc (was Re: [PATCH v2 0/5] Speed up uNN_chr and uNN_strchr with Boyer-Moore algorithm)
Date: Thu, 29 Jul 2010 18:00:12 +0200
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On 07/29/2010 05:36 PM, Bruno Haible wrote:
You should better use u8_strmbtouc in this case.

Aha, that's true. This function is a better match, but only because it supports CONFIG_UNICODE_SAFETY and is faster in that case (because it can just compare with zero).

Still, without safety u8_strmbtouc(puc, s) uses the same code as u8_mbtouc(puc, s, SIZE_MAX), which makes pretty much my point. I think it is safe and actually very useful to document u8_mbtouc/u16_mbtouc as looking only one byte (resp. one short) beyond the first complete character.


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