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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/gnu/gcj/convert/natOutput_EUCJIS.cc | |
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Diffstat (limited to 'libjava/gnu/gcj/convert/natOutput_EUCJIS.cc')
-rw-r--r-- | libjava/gnu/gcj/convert/natOutput_EUCJIS.cc | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/convert/natOutput_EUCJIS.cc b/libjava/gnu/gcj/convert/natOutput_EUCJIS.cc new file mode 100644 index 000000000..533fb9f1b --- /dev/null +++ b/libjava/gnu/gcj/convert/natOutput_EUCJIS.cc @@ -0,0 +1,102 @@ +/* Copyright (C) 1999 Free Software Foundation + + This file is part of libgcj. + +This software is copyrighted work licensed under the terms of the +Libgcj License. Please consult the file "LIBGCJ_LICENSE" for +details. */ + +#include <config.h> +#include <gcj/cni.h> +#include <gnu/gcj/convert/Output_EUCJIS.h> + +/* A trie structure to map unicode values to JIS codes. + * code == -1: the character is undefined. + * code >= 0 && code < 128: JIS-Roman - mostly Ascii. + * code >= 128 && code < 256: Half-width Katakana. + * code >= 256 && code < 0x8000: JIS X 0208:1997. + * code >= 0x8000 && code < 0xFFFF: JIX X 0212-1990. + */ + +extern unsigned short Unicode_to_JIS[]; + +int +trie_lookup (unsigned short *trie, unsigned short key) +{ + unsigned short branch = trie[(key >> 12) & 0xf]; + if (branch == 0) + return -1; + branch = trie[branch + ((key >> 8) & 0xf)]; + if (branch == 0) + return -1; + branch = trie[branch + ((key >> 4) & 0xf)]; + if (branch == 0) + return -1; + return trie[branch + (key & 0xf)]; +} + +static jint +convert_TO_EUCJIS (gnu::gcj::convert::Output_EUCJIS *encoder, + jchar *ptr, jint inlength) +{ + int orig_inlength = inlength; + jint outbuf_length = encoder->buf->length; + for (;;) + { + if (encoder->count >= outbuf_length) + break; + if (encoder->pending1 >= 0) + { + elements(encoder->buf)[encoder->count++] = encoder->pending1; + encoder->pending1 = encoder->pending2; + encoder->pending2 = -1; + continue; + } + if (inlength == 0) + break; + jchar ch = *ptr++; + inlength--; + unsigned short val = trie_lookup(Unicode_to_JIS, ch); + if (val < 0x80) + { + if (val == 0xffff) + val = '?'; + } + else if (val <= 0xFF) + { + encoder->pending1 = val; + encoder->pending2 = -1; + val = 0x8e; + } + else if (val < 0x8000) + { + val |= 0x8080; + encoder->pending1 = val & 0xff; + val = val >> 8; + encoder->pending2 = -1; + } + else + { + val |= 0x8080; + encoder->pending1 = val >> 8; + encoder->pending2 = val & 0xff; + val = 0x8f; + } + elements(encoder->buf)[encoder->count++] = val; + } + return orig_inlength - inlength; +} + +jint +gnu::gcj::convert::Output_EUCJIS::write (jcharArray inbuffer, + jint inpos, jint inlength) +{ + return convert_TO_EUCJIS(this, &elements(inbuffer)[inpos], inlength); +} + +jint +gnu::gcj::convert::Output_EUCJIS::write (jstring str, jint inpos, + jint inlength, jcharArray) +{ + return convert_TO_EUCJIS(this, _Jv_GetStringChars(str)+inpos, inlength); +} |