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authorHiltjo Posthuma <hiltjo@codemadness.org>2021-01-08 19:08:59 +0100
committerHiltjo Posthuma <hiltjo@codemadness.org>2021-01-08 19:33:29 +0100
commit04b832539cd5b5392c56ef238ec9b42b689de3ae (patch)
treef934b2769023a800ee0befe7608bdf70642fd39f /doc/html
parentc7e3ec5f37738c43b3918cba6977fa51631a23af (diff)
util.c: printutf8pad(): improve padded printing and printing invalid unicode characters
This affects sfeed_plain. - Use unicode replacement character (codepoint 0xfffd) when a codepoint is invalid and proceed printing the rest of the characters. - When a codepoint is invalid reset the internal state of mbtowc(3), from the OpenBSD man page: " If a call to mbtowc() resulted in an undefined internal state, mbtowc() must be called with s set to NULL to reset the internal state before it can safely be used again." - Optimize for the common ASCII case and use a macro to print the character instead of a wasteful fwrite() function call. With 250k lines (+- 350MB) this improves printing performance from 1.7s to 1.0s on my laptop. On an other system it improved by +- 25%. Tested with clang and gcc and also tested the worst-case (non-ASCII) with no penalty. To test: printf '0\tabc\xc3 def' | sfeed_plain Before: 1970-01-01 01:00 abc After: 1970-01-01 01:00 abc� def
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