471 lines
9.6 KiB
C
471 lines
9.6 KiB
C
/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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* Copyright (c) 2011, 2012
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* Zhihao Yuan. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "$Id: conv.c,v 2.40 2014/02/27 16:25:29 zy Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <errno.h>
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#include <limits.h>
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#include <langinfo.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <unistd.h>
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#include "common.h"
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/*
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* codeset --
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* Get the locale encoding.
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*
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* PUBLIC: char * codeset(void);
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*/
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char *
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codeset(void)
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{
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static char *cs;
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if (cs == NULL)
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cs = nl_langinfo(CODESET);
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return cs;
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}
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#ifdef USE_WIDECHAR
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static int
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raw2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw, size_t *tolen,
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CHAR_T **dst)
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{
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int i;
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CHAR_T **tostr = &cw->bp1.wc;
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size_t *blen = &cw->blen1;
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BINC_RETW(NULL, *tostr, *blen, len);
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*tolen = len;
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for (i = 0; i < len; ++i)
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(*tostr)[i] = (u_char) str[i];
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*dst = cw->bp1.wc;
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return 0;
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}
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#define CONV_BUFFER_SIZE 512
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/* fill the buffer with codeset encoding of string pointed to by str
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* left has the number of bytes left in str and is adjusted
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* len contains the number of bytes put in the buffer
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*/
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#ifdef USE_ICONV
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#define CONVERT(str, left, src, len) \
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do { \
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size_t outleft; \
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char *bp = buffer; \
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outleft = CONV_BUFFER_SIZE; \
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errno = 0; \
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if (iconv(id, (iconv_src_t)&str, &left, &bp, &outleft) \
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== -1 && errno != E2BIG) \
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goto err; \
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if ((len = CONV_BUFFER_SIZE - outleft) == 0) { \
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error = -left; \
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goto err; \
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} \
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src = buffer; \
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} while (0)
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#define IC_RESET() \
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do { \
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if (id != (iconv_t)-1) \
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iconv(id, NULL, NULL, NULL, NULL); \
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} while(0)
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#else
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#define CONVERT(str, left, src, len)
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#define IC_RESET()
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#endif
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static int
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default_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw,
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size_t *tolen, CHAR_T **dst, iconv_t id)
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{
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size_t i = 0, j;
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CHAR_T **tostr = &cw->bp1.wc;
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size_t *blen = &cw->blen1;
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mbstate_t mbs;
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size_t n;
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ssize_t nlen = len;
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char *src = (char *)str;
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#ifdef USE_ICONV
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char buffer[CONV_BUFFER_SIZE];
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#endif
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size_t left = len;
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int error = 1;
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BZERO(&mbs, 1);
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BINC_RETW(NULL, *tostr, *blen, nlen);
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#ifdef USE_ICONV
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if (id != (iconv_t)-1)
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CONVERT(str, left, src, len);
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#endif
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for (i = 0, j = 0; j < len; ) {
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n = mbrtowc((*tostr)+i, src+j, len-j, &mbs);
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/* NULL character converted */
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if (n == -2)
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error = -(len-j);
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if (n == -1 || n == -2)
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goto err;
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if (n == 0)
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n = 1;
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j += n;
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if (++i >= *blen) {
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nlen += 256;
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BINC_RETW(NULL, *tostr, *blen, nlen);
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}
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if (id != (iconv_t)-1 && j == len && left) {
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CONVERT(str, left, src, len);
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j = 0;
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}
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}
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error = 0;
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err:
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*tolen = i;
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*dst = cw->bp1.wc;
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IC_RESET();
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return error;
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}
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static int
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fe_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw, size_t *tolen,
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CHAR_T **dst)
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{
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return default_char2int(sp, str, len, cw, tolen, dst,
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sp->conv.id[IC_FE_CHAR2INT]);
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}
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static int
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ie_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw, size_t *tolen,
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CHAR_T **dst)
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{
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return default_char2int(sp, str, len, cw, tolen, dst,
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sp->conv.id[IC_IE_CHAR2INT]);
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}
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static int
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cs_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw, size_t *tolen,
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CHAR_T **dst)
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{
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return default_char2int(sp, str, len, cw, tolen, dst, (iconv_t)-1);
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}
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static int
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int2raw(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw, size_t *tolen,
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char **dst)
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{
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int i;
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char **tostr = &cw->bp1.c;
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size_t *blen = &cw->blen1;
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BINC_RETC(NULL, *tostr, *blen, len);
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*tolen = len;
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for (i = 0; i < len; ++i)
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(*tostr)[i] = str[i];
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*dst = cw->bp1.c;
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return 0;
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}
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static int
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default_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
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size_t *tolen, char **pdst, iconv_t id)
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{
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size_t i, j, offset = 0;
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char **tostr = &cw->bp1.c;
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size_t *blen = &cw->blen1;
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mbstate_t mbs;
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size_t n;
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ssize_t nlen = len + MB_CUR_MAX;
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char *dst;
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size_t buflen;
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#ifdef USE_ICONV
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char buffer[CONV_BUFFER_SIZE];
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#endif
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int error = 1;
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/* convert first len bytes of buffer and append it to cw->bp
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* len is adjusted => 0
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* offset contains the offset in cw->bp and is adjusted
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* cw->bp is grown as required
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*/
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#ifdef USE_ICONV
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#define CONVERT2(_buffer, lenp, cw, offset) \
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do { \
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char *bp = _buffer; \
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int ret; \
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do { \
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size_t outleft = cw->blen1 - offset; \
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char *obp = cw->bp1.c + offset; \
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if (cw->blen1 < offset + MB_CUR_MAX) { \
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nlen += 256; \
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BINC_RETC(NULL, cw->bp1.c, cw->blen1, \
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nlen); \
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} \
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errno = 0; \
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ret = iconv(id, (iconv_src_t)&bp, lenp, &obp, \
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&outleft); \
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if (ret == -1 && errno != E2BIG) \
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goto err; \
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offset = cw->blen1 - outleft; \
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} while (ret != 0); \
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} while (0)
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#else
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#define CONVERT2(_buffer, lenp, cw, offset)
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#endif
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BZERO(&mbs, 1);
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BINC_RETC(NULL, *tostr, *blen, nlen);
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dst = *tostr; buflen = *blen;
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#ifdef USE_ICONV
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if (id != (iconv_t)-1) {
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dst = buffer; buflen = CONV_BUFFER_SIZE;
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}
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#endif
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for (i = 0, j = 0; i < len; ++i) {
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n = wcrtomb(dst+j, str[i], &mbs);
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if (n == -1)
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goto err;
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j += n;
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if (buflen < j + MB_CUR_MAX) {
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if (id != (iconv_t)-1) {
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CONVERT2(buffer, &j, cw, offset);
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} else {
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nlen += 256;
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BINC_RETC(NULL, *tostr, *blen, nlen);
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dst = *tostr; buflen = *blen;
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}
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}
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}
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n = wcrtomb(dst+j, L'\0', &mbs);
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j += n - 1; /* don't count NUL at the end */
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*tolen = j;
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if (id != (iconv_t)-1) {
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CONVERT2(buffer, &j, cw, offset);
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/* back to the initial state */
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CONVERT2(NULL, NULL, cw, offset);
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*tolen = offset;
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}
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error = 0;
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err:
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if (error)
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*tolen = j;
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*pdst = cw->bp1.c;
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IC_RESET();
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return error;
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}
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static int
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fe_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
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size_t *tolen, char **dst)
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{
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return default_int2char(sp, str, len, cw, tolen, dst,
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sp->conv.id[IC_FE_INT2CHAR]);
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}
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static int
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cs_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
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size_t *tolen, char **dst)
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{
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return default_int2char(sp, str, len, cw, tolen, dst, (iconv_t)-1);
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}
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#endif
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/*
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* conv_init --
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* Initialize the iconv environment.
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*
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* PUBLIC: void conv_init(SCR *, SCR *);
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*/
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void
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conv_init(SCR *orig, SCR *sp)
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{
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int i;
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if (orig == NULL)
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setlocale(LC_ALL, "");
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if (orig != NULL)
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BCOPY(&orig->conv, &sp->conv, 1);
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#ifdef USE_WIDECHAR
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else {
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char *ctype = setlocale(LC_CTYPE, NULL);
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/*
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* XXX
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* This hack fixes the libncursesw issue on FreeBSD.
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*/
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if (!strcmp(ctype, "ko_KR.CP949"))
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setlocale(LC_CTYPE, "ko_KR.eucKR");
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else if (!strcmp(ctype, "zh_CN.GB2312"))
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setlocale(LC_CTYPE, "zh_CN.eucCN");
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else if (!strcmp(ctype, "zh_CN.GBK"))
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setlocale(LC_CTYPE, "zh_CN.GB18030");
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/*
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* Switch to 8bit mode if locale is C;
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* LC_CTYPE should be reseted to C if unmatched.
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*/
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if (!strcmp(ctype, "C") || !strcmp(ctype, "POSIX")) {
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sp->conv.sys2int = sp->conv.file2int = raw2int;
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sp->conv.int2sys = sp->conv.int2file = int2raw;
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sp->conv.input2int = raw2int;
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} else {
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sp->conv.sys2int = cs_char2int;
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sp->conv.int2sys = cs_int2char;
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sp->conv.file2int = fe_char2int;
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sp->conv.int2file = fe_int2char;
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sp->conv.input2int = ie_char2int;
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}
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#ifdef USE_ICONV
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o_set(sp, O_INPUTENCODING, OS_STRDUP, codeset(), 0);
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#endif
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}
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#endif
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/* iconv descriptors must be distinct to screens. */
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for (i = 0; i <= IC_IE_TO_UTF16; ++i)
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sp->conv.id[i] = (iconv_t)-1;
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#ifdef USE_ICONV
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conv_enc(sp, O_INPUTENCODING, 0);
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#endif
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}
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/*
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* conv_enc --
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* Convert file/input encoding.
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*
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* PUBLIC: int conv_enc(SCR *, int, char *);
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*/
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int
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conv_enc(SCR *sp, int option, char *enc)
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{
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#if defined(USE_WIDECHAR) && defined(USE_ICONV)
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iconv_t *c2w, *w2c;
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iconv_t id_c2w, id_w2c;
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switch (option) {
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case O_FILEENCODING:
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c2w = sp->conv.id + IC_FE_CHAR2INT;
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w2c = sp->conv.id + IC_FE_INT2CHAR;
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if (!enc)
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enc = O_STR(sp, O_FILEENCODING);
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if (strcasecmp(codeset(), enc)) {
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if ((id_c2w = iconv_open(codeset(), enc)) ==
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(iconv_t)-1)
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goto err;
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if ((id_w2c = iconv_open(enc, codeset())) ==
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(iconv_t)-1)
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goto err;
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} else {
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id_c2w = (iconv_t)-1;
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id_w2c = (iconv_t)-1;
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}
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break;
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case O_INPUTENCODING:
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c2w = sp->conv.id + IC_IE_CHAR2INT;
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w2c = sp->conv.id + IC_IE_TO_UTF16;
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if (!enc)
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enc = O_STR(sp, O_INPUTENCODING);
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if (strcasecmp(codeset(), enc)) {
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if ((id_c2w = iconv_open(codeset(), enc)) ==
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(iconv_t)-1)
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goto err;
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} else
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id_c2w = (iconv_t)-1;
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/* UTF-16 can not be locale and can not be inputed. */
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if ((id_w2c = iconv_open("utf-16be", enc)) == (iconv_t)-1)
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goto err;
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break;
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default:
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abort();
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}
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if (*c2w != (iconv_t)-1)
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iconv_close(*c2w);
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if (*w2c != (iconv_t)-1)
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iconv_close(*w2c);
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*c2w = id_c2w;
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*w2c = id_w2c;
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F_CLR(sp, SC_CONV_ERROR);
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F_SET(sp, SC_SCR_REFORMAT);
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return 0;
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err:
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#endif
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switch (option) {
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case O_FILEENCODING:
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msgq(sp, M_ERR, "321|File encoding conversion not supported");
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break;
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case O_INPUTENCODING:
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msgq(sp, M_ERR, "322|Input encoding conversion not supported");
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break;
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}
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return 1;
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}
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/*
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* conv_end --
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* Close the iconv descriptors, release the buffer.
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*
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* PUBLIC: void conv_end(SCR *);
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*/
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void
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conv_end(SCR *sp)
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{
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#if defined(USE_WIDECHAR) && defined(USE_ICONV)
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int i;
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for (i = 0; i <= IC_IE_TO_UTF16; ++i)
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if (sp->conv.id[i] != (iconv_t)-1)
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iconv_close(sp->conv.id[i]);
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if (sp->cw.bp1.c != NULL)
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free(sp->cw.bp1.c);
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#endif
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}
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