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134 lines
2.5 KiB
C
134 lines
2.5 KiB
C
/*
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* _hz.c: the HZ codec (RFC1843)
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*
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* Written by Hye-Shik Chang <perky@FreeBSD.org>
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* $CJKCodecs: _hz.c,v 1.2 2003/12/31 05:46:55 perky Exp $
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*/
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#include "codeccommon.h"
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ENCMAP(gbcommon)
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DECMAP(gb2312)
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#define HAVE_ENCODER_INIT
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ENCODER_INIT(hz)
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{
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state->i = 0;
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return 0;
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}
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#define HAVE_ENCODER_RESET
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ENCODER_RESET(hz)
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{
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if (state->i != 0) {
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WRITE2('~', '}')
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state->i = 0;
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NEXT_OUT(2)
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}
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return 0;
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}
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ENCODER(hz)
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{
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while (inleft > 0) {
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Py_UNICODE c = IN1;
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DBCHAR code;
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if (c < 0x80) {
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if (state->i == 0) {
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WRITE1((unsigned char)c)
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NEXT(1, 1)
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} else {
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WRITE3('~', '}', (unsigned char)c)
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NEXT(1, 3)
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state->i = 0;
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}
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continue;
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}
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UCS4INVALID(c)
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TRYMAP_ENC(gbcommon, code, c);
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else return 1;
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if (code & 0x8000) /* MSB set: GBK */
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return 1;
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if (state->i == 0) {
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WRITE4('~', '{', code >> 8, code & 0xff)
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NEXT(1, 4)
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state->i = 1;
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} else {
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WRITE2(code >> 8, code & 0xff)
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NEXT(1, 2)
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}
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}
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return 0;
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}
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#define HAVE_DECODER_INIT
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DECODER_INIT(hz)
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{
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state->i = 0;
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return 0;
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}
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#define HAVE_DECODER_RESET
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DECODER_RESET(hz)
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{
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state->i = 0;
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return 0;
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}
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DECODER(hz)
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{
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while (inleft > 0) {
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unsigned char c = IN1;
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if (c == '~') {
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unsigned char c2 = IN2;
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RESERVE_INBUF(2)
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if (c2 == '~') {
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WRITE1('~')
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NEXT(2, 1)
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continue;
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} else if (c2 == '{' && state->i == 0)
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state->i = 1; /* set GB */
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else if (c2 == '}' && state->i == 1)
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state->i = 0; /* set ASCII */
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else if (c2 == '\n')
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; /* line-continuation */
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else
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return 2;
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NEXT(2, 0);
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continue;
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}
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if (c & 0x80)
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return 1;
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if (state->i == 0) { /* ASCII mode */
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WRITE1(c)
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NEXT(1, 1)
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} else { /* GB mode */
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RESERVE_INBUF(2)
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RESERVE_OUTBUF(1)
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TRYMAP_DEC(gb2312, **outbuf, c, IN2) {
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NEXT(2, 1)
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} else
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return 2;
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}
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}
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return 0;
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}
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#include "codecentry.h"
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BEGIN_CODEC_REGISTRY(hz)
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MAPOPEN(zh_CN)
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IMPORTMAP_DEC(gb2312)
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IMPORTMAP_ENC(gbcommon)
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MAPCLOSE()
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END_CODEC_REGISTRY(hz)
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