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authorRich Felker <dalias@aerifal.cx>2017-11-13 18:34:27 -0500
committerRich Felker <dalias@aerifal.cx>2017-11-13 18:34:27 -0500
commit105eff9dec51bc4898a74af2854ab71f927a5c3b (patch)
tree5ee1447893b7b760c599afb19341b5f8f2eb8ee3 /src/math/i386/scalbn.s
parenta71b46cfd289aa0ff829fc9a436c59c398f8326d (diff)
downloadmusl-105eff9dec51bc4898a74af2854ab71f927a5c3b.tar.gz
generalize iconv framework for 8-bit codepages
previously, 8-bit codepages could only remap the high 128 bytes; the low range was assumed/forced to agree with ascii. interpretation of codepage table headers has been changed so that it's possible to represent mappings for up to 256 slots (fewer if the initial portion of the map is elided because it coincides with unicode codepoints). this requires consuming a bit more of the 10-bit space of characters that can be represented in 8-bit codepages, but there's still a plenty left. the size of the legacy_chars table is actually reduced now by eliding the first 256 entries and considering them to map implicitly via the identity map. before these changes, there seem to have been minor bugs/omissions in codepage table generation, so it's likely that some actual bug fixes are silently included in this commit. round-trip testing of a few codepages was performed on the new version of the code, but no differential testing against the old version was done.
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