714 lines
15 KiB
C
714 lines
15 KiB
C
/* $Header: /p/tcsh/cvsroot/tcsh/tc.str.c,v 3.47 2015/06/06 21:19:08 christos Exp $ */
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/*
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* tc.str.c: Short string package
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* This has been a lesson of how to write buggy code!
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sh.h"
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#include <assert.h>
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#include <limits.h>
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RCSID("$tcsh: tc.str.c,v 3.47 2015/06/06 21:19:08 christos Exp $")
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#define MALLOC_INCR 128
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#ifdef WIDE_STRINGS
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#define MALLOC_SURPLUS MB_LEN_MAX /* Space for one multibyte character */
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#else
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#define MALLOC_SURPLUS 0
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#endif
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#ifdef WIDE_STRINGS
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size_t
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one_mbtowc(Char *pwc, const char *s, size_t n)
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{
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int len;
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len = rt_mbtowc(pwc, s, n);
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if (len == -1) {
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reset_mbtowc();
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*pwc = (unsigned char)*s | INVALID_BYTE;
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}
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if (len <= 0)
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len = 1;
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return len;
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}
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size_t
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one_wctomb(char *s, Char wchar)
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{
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int len;
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#if INVALID_BYTE != 0
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if ((wchar & INVALID_BYTE) == INVALID_BYTE) { /* wchar >= INVALID_BYTE */
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/* invalid char
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* exmaple)
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* if wchar = f0000090(=90|INVALID_BYTE), then *s = ffffff90 */
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*s = (char)wchar;
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len = 1;
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#else
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if (wchar & (CHAR & INVALID_BYTE)) {
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s[0] = wchar & (CHAR & 0xFF);
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len = 1;
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#endif
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} else {
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#if INVALID_BYTE != 0
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wchar &= MAX_UTF32;
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#else
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wchar &= CHAR;
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#endif
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#ifdef UTF16_STRINGS
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if (wchar >= 0x10000) {
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/* UTF-16 systems can't handle these values directly in calls to
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wctomb. Convert value to UTF-16 surrogate and call wcstombs to
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convert the "string" to the correct multibyte representation,
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if any. */
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wchar_t ws[3];
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wchar -= 0x10000;
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ws[0] = 0xd800 | (wchar >> 10);
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ws[1] = 0xdc00 | (wchar & 0x3ff);
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ws[2] = 0;
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/* The return value of wcstombs excludes the trailing 0, so len is
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the correct number of multibytes for the Unicode char. */
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len = wcstombs (s, ws, MB_CUR_MAX + 1);
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} else
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#endif
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len = wctomb(s, (wchar_t) wchar);
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if (len == -1)
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s[0] = wchar;
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if (len <= 0)
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len = 1;
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}
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return len;
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}
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int
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rt_mbtowc(Char *pwc, const char *s, size_t n)
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{
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int ret;
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char back[MB_LEN_MAX];
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wchar_t tmp;
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#if defined(UTF16_STRINGS) && defined(HAVE_MBRTOWC)
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# if defined(AUTOSET_KANJI)
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static mbstate_t mb_zero, mb;
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/*
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* Workaround the Shift-JIS endcoding that translates unshifted 7 bit ASCII!
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*/
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if (!adrof(STRnokanji) && n && pwc && s && (*s == '\\' || *s == '~') &&
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!memcmp(&mb, &mb_zero, sizeof(mb)))
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{
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*pwc = *s;
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return 1;
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}
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# else
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mbstate_t mb;
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# endif
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memset (&mb, 0, sizeof mb);
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ret = mbrtowc(&tmp, s, n, &mb);
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#else
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ret = mbtowc(&tmp, s, n);
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#endif
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if (ret > 0) {
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*pwc = tmp;
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#if defined(UTF16_STRINGS) && defined(HAVE_MBRTOWC)
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if (tmp >= 0xd800 && tmp <= 0xdbff) {
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/* UTF-16 surrogate pair. Fetch second half and compute
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UTF-32 value. Dispense with the inverse test in this case. */
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size_t n2 = mbrtowc(&tmp, s + ret, n - ret, &mb);
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if (n2 == 0 || n2 == (size_t)-1 || n2 == (size_t)-2)
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ret = -1;
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else {
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*pwc = (((*pwc & 0x3ff) << 10) | (tmp & 0x3ff)) + 0x10000;
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ret += n2;
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}
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} else
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#endif
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if (wctomb(back, *pwc) != ret || memcmp(s, back, ret) != 0)
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ret = -1;
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} else if (ret == -2)
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ret = -1;
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else if (ret == 0)
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*pwc = '\0';
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return ret;
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}
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#endif
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#ifdef SHORT_STRINGS
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Char **
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blk2short(char **src)
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{
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size_t n;
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Char **sdst, **dst;
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/*
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* Count
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*/
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for (n = 0; src[n] != NULL; n++)
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continue;
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sdst = dst = xmalloc((n + 1) * sizeof(Char *));
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for (; *src != NULL; src++)
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*dst++ = SAVE(*src);
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*dst = NULL;
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return (sdst);
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}
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char **
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short2blk(Char **src)
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{
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size_t n;
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char **sdst, **dst;
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/*
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* Count
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*/
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for (n = 0; src[n] != NULL; n++)
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continue;
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sdst = dst = xmalloc((n + 1) * sizeof(char *));
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for (; *src != NULL; src++)
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*dst++ = strsave(short2str(*src));
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*dst = NULL;
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return (sdst);
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}
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Char *
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str2short(const char *src)
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{
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static struct Strbuf buf; /* = Strbuf_INIT; */
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if (src == NULL)
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return (NULL);
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buf.len = 0;
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while (*src) {
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Char wc;
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src += one_mbtowc(&wc, src, MB_LEN_MAX);
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Strbuf_append1(&buf, wc);
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}
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Strbuf_terminate(&buf);
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return buf.s;
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}
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char *
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short2str(const Char *src)
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{
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static char *sdst = NULL;
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static size_t dstsize = 0;
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char *dst, *edst;
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if (src == NULL)
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return (NULL);
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if (sdst == NULL) {
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dstsize = MALLOC_INCR;
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sdst = xmalloc((dstsize + MALLOC_SURPLUS) * sizeof(char));
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}
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dst = sdst;
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edst = &dst[dstsize];
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while (*src) {
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dst += one_wctomb(dst, *src);
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src++;
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if (dst >= edst) {
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char *wdst = dst;
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char *wedst = edst;
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dstsize += MALLOC_INCR;
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sdst = xrealloc(sdst, (dstsize + MALLOC_SURPLUS) * sizeof(char));
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edst = &sdst[dstsize];
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dst = &edst[-MALLOC_INCR];
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while (wdst > wedst) {
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dst++;
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wdst--;
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}
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}
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}
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*dst = 0;
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return (sdst);
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}
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#if !defined (WIDE_STRINGS) || defined (UTF16_STRINGS)
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Char *
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s_strcpy(Char *dst, const Char *src)
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{
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Char *sdst;
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sdst = dst;
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while ((*dst++ = *src++) != '\0')
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continue;
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return (sdst);
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}
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Char *
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s_strncpy(Char *dst, const Char *src, size_t n)
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{
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Char *sdst;
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if (n == 0)
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return(dst);
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sdst = dst;
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do
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if ((*dst++ = *src++) == '\0') {
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while (--n != 0)
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*dst++ = '\0';
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return(sdst);
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}
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while (--n != 0);
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return (sdst);
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}
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Char *
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s_strcat(Char *dst, const Char *src)
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{
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Strcpy(Strend(dst), src);
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return dst;
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}
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#ifdef NOTUSED
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Char *
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s_strncat(Char *dst, const Char *src, size_t n)
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{
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Char *sdst;
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if (n == 0)
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return (dst);
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sdst = dst;
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while (*dst)
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dst++;
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do
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if ((*dst++ = *src++) == '\0')
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return(sdst);
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while (--n != 0)
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continue;
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*dst = '\0';
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return (sdst);
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}
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#endif
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Char *
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s_strchr(const Char *str, int ch)
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{
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do
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if (*str == ch)
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return ((Char *)(intptr_t)str);
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while (*str++);
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return (NULL);
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}
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Char *
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s_strrchr(const Char *str, int ch)
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{
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const Char *rstr;
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rstr = NULL;
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do
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if (*str == ch)
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rstr = str;
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while (*str++);
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return ((Char *)(intptr_t)rstr);
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}
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size_t
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s_strlen(const Char *str)
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{
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size_t n;
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for (n = 0; *str++; n++)
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continue;
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return (n);
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}
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int
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s_strcmp(const Char *str1, const Char *str2)
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{
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for (; *str1 && *str1 == *str2; str1++, str2++)
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continue;
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/*
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* The following case analysis is necessary so that characters which look
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* negative collate low against normal characters but high against the
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* end-of-string NUL.
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*/
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if (*str1 == '\0' && *str2 == '\0')
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return (0);
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else if (*str1 == '\0')
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return (-1);
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else if (*str2 == '\0')
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return (1);
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else
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return (*str1 - *str2);
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}
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int
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s_strncmp(const Char *str1, const Char *str2, size_t n)
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{
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if (n == 0)
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return (0);
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do {
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if (*str1 != *str2) {
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/*
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* The following case analysis is necessary so that characters
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* which look negative collate low against normal characters
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* but high against the end-of-string NUL.
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*/
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if (*str1 == '\0')
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return (-1);
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else if (*str2 == '\0')
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return (1);
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else
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return (*str1 - *str2);
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}
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if (*str1 == '\0')
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return(0);
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str1++, str2++;
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} while (--n != 0);
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return(0);
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}
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#endif /* not WIDE_STRINGS */
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int
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s_strcasecmp(const Char *str1, const Char *str2)
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{
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#ifdef WIDE_STRINGS
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wint_t l1 = 0, l2 = 0;
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for (; *str1; str1++, str2++)
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if (*str1 == *str2)
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l1 = l2 = 0;
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else if ((l1 = towlower(*str1)) != (l2 = towlower(*str2)))
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break;
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#else
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unsigned char l1 = 0, l2 = 0;
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for (; *str1; str1++, str2++)
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if (*str1 == *str2)
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l1 = l2 = 0;
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else if ((l1 = tolower((unsigned char)*str1)) !=
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(l2 = tolower((unsigned char)*str2)))
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break;
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#endif
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/*
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* The following case analysis is necessary so that characters which look
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* negative collate low against normal characters but high against the
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* end-of-string NUL.
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*/
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if (*str1 == '\0' && *str2 == '\0')
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return (0);
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else if (*str1 == '\0')
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return (-1);
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else if (*str2 == '\0')
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return (1);
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else if (l1 == l2) /* They are zero when they are equal */
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return (*str1 - *str2);
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else
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return (l1 - l2);
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}
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Char *
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s_strnsave(const Char *s, size_t len)
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{
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Char *n;
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n = xmalloc((len + 1) * sizeof (*n));
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memcpy(n, s, len * sizeof (*n));
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n[len] = '\0';
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return n;
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}
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Char *
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s_strsave(const Char *s)
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{
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Char *n;
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size_t size;
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if (s == NULL)
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s = STRNULL;
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size = (Strlen(s) + 1) * sizeof(*n);
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n = xmalloc(size);
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memcpy(n, s, size);
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return (n);
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}
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Char *
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s_strspl(const Char *cp, const Char *dp)
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{
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Char *res, *ep;
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const Char *p, *q;
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if (!cp)
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cp = STRNULL;
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if (!dp)
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dp = STRNULL;
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for (p = cp; *p++;)
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continue;
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for (q = dp; *q++;)
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continue;
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res = xmalloc(((p - cp) + (q - dp) - 1) * sizeof(Char));
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for (ep = res, q = cp; (*ep++ = *q++) != '\0';)
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continue;
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for (ep--, q = dp; (*ep++ = *q++) != '\0';)
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continue;
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return (res);
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}
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Char *
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s_strend(const Char *cp)
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{
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if (!cp)
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return ((Char *)(intptr_t) cp);
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while (*cp)
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cp++;
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return ((Char *)(intptr_t) cp);
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}
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Char *
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s_strstr(const Char *s, const Char *t)
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{
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do {
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const Char *ss = s;
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const Char *tt = t;
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do
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if (*tt == '\0')
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return ((Char *)(intptr_t) s);
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while (*ss++ == *tt++);
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} while (*s++ != '\0');
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return (NULL);
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}
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#else /* !SHORT_STRINGS */
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char *
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caching_strip(const char *s)
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{
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static char *buf = NULL;
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static size_t buf_size = 0;
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size_t size;
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if (s == NULL)
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return NULL;
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size = strlen(s) + 1;
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if (buf_size < size) {
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buf = xrealloc(buf, size);
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buf_size = size;
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}
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memcpy(buf, s, size);
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strip(buf);
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return buf;
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}
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#endif
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char *
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short2qstr(const Char *src)
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{
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static char *sdst = NULL;
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static size_t dstsize = 0;
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char *dst, *edst;
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if (src == NULL)
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return (NULL);
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if (sdst == NULL) {
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dstsize = MALLOC_INCR;
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sdst = xmalloc((dstsize + MALLOC_SURPLUS) * sizeof(char));
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}
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dst = sdst;
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edst = &dst[dstsize];
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while (*src) {
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if (*src & QUOTE) {
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*dst++ = '\\';
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if (dst == edst) {
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dstsize += MALLOC_INCR;
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sdst = xrealloc(sdst,
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(dstsize + MALLOC_SURPLUS) * sizeof(char));
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edst = &sdst[dstsize];
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dst = &edst[-MALLOC_INCR];
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}
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}
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dst += one_wctomb(dst, *src);
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src++;
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if (dst >= edst) {
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ptrdiff_t i = dst - edst;
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dstsize += MALLOC_INCR;
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sdst = xrealloc(sdst, (dstsize + MALLOC_SURPLUS) * sizeof(char));
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edst = &sdst[dstsize];
|
|
dst = &edst[-MALLOC_INCR + i];
|
|
}
|
|
}
|
|
*dst = 0;
|
|
return (sdst);
|
|
}
|
|
|
|
struct blk_buf *
|
|
bb_alloc(void)
|
|
{
|
|
return xcalloc(1, sizeof(struct blk_buf));
|
|
}
|
|
|
|
static void
|
|
bb_store(struct blk_buf *bb, Char *str)
|
|
{
|
|
if (bb->len == bb->size) { /* Keep space for terminating NULL */
|
|
if (bb->size == 0)
|
|
bb->size = 16; /* Arbitrary */
|
|
else
|
|
bb->size *= 2;
|
|
bb->vec = xrealloc(bb->vec, bb->size * sizeof (*bb->vec));
|
|
}
|
|
bb->vec[bb->len] = str;
|
|
}
|
|
|
|
void
|
|
bb_append(struct blk_buf *bb, Char *str)
|
|
{
|
|
bb_store(bb, str);
|
|
bb->len++;
|
|
}
|
|
|
|
void
|
|
bb_cleanup(void *xbb)
|
|
{
|
|
struct blk_buf *bb;
|
|
size_t i;
|
|
|
|
bb = (struct blk_buf *)xbb;
|
|
if (bb->vec) {
|
|
for (i = 0; i < bb->len; i++)
|
|
xfree(bb->vec[i]);
|
|
xfree(bb->vec);
|
|
}
|
|
bb->vec = NULL;
|
|
bb->len = 0;
|
|
}
|
|
|
|
void
|
|
bb_free(void *bb)
|
|
{
|
|
bb_cleanup(bb);
|
|
xfree(bb);
|
|
}
|
|
|
|
Char **
|
|
bb_finish(struct blk_buf *bb)
|
|
{
|
|
bb_store(bb, NULL);
|
|
return xrealloc(bb->vec, (bb->len + 1) * sizeof (*bb->vec));
|
|
}
|
|
|
|
#define DO_STRBUF(STRBUF, CHAR, STRLEN) \
|
|
\
|
|
struct STRBUF * \
|
|
STRBUF##_alloc(void) \
|
|
{ \
|
|
return xcalloc(1, sizeof(struct STRBUF)); \
|
|
} \
|
|
\
|
|
static void \
|
|
STRBUF##_store1(struct STRBUF *buf, CHAR c) \
|
|
{ \
|
|
if (buf->size == buf->len) { \
|
|
if (buf->size == 0) \
|
|
buf->size = 64; /* Arbitrary */ \
|
|
else \
|
|
buf->size *= 2; \
|
|
buf->s = xrealloc(buf->s, buf->size * sizeof(*buf->s)); \
|
|
} \
|
|
assert(buf->s); \
|
|
buf->s[buf->len] = c; \
|
|
} \
|
|
\
|
|
/* Like strbuf_append1(buf, '\0'), but don't advance len */ \
|
|
void \
|
|
STRBUF##_terminate(struct STRBUF *buf) \
|
|
{ \
|
|
STRBUF##_store1(buf, '\0'); \
|
|
} \
|
|
\
|
|
void \
|
|
STRBUF##_append1(struct STRBUF *buf, CHAR c) \
|
|
{ \
|
|
STRBUF##_store1(buf, c); \
|
|
buf->len++; \
|
|
} \
|
|
\
|
|
void \
|
|
STRBUF##_appendn(struct STRBUF *buf, const CHAR *s, size_t len) \
|
|
{ \
|
|
if (buf->size < buf->len + len) { \
|
|
if (buf->size == 0) \
|
|
buf->size = 64; /* Arbitrary */ \
|
|
while (buf->size < buf->len + len) \
|
|
buf->size *= 2; \
|
|
buf->s = xrealloc(buf->s, buf->size * sizeof(*buf->s)); \
|
|
} \
|
|
memcpy(buf->s + buf->len, s, len * sizeof(*buf->s)); \
|
|
buf->len += len; \
|
|
} \
|
|
\
|
|
void \
|
|
STRBUF##_append(struct STRBUF *buf, const CHAR *s) \
|
|
{ \
|
|
STRBUF##_appendn(buf, s, STRLEN(s)); \
|
|
} \
|
|
\
|
|
CHAR * \
|
|
STRBUF##_finish(struct STRBUF *buf) \
|
|
{ \
|
|
STRBUF##_append1(buf, 0); \
|
|
return xrealloc(buf->s, buf->len * sizeof(*buf->s)); \
|
|
} \
|
|
\
|
|
void \
|
|
STRBUF##_cleanup(void *xbuf) \
|
|
{ \
|
|
struct STRBUF *buf; \
|
|
\
|
|
buf = xbuf; \
|
|
xfree(buf->s); \
|
|
} \
|
|
\
|
|
void \
|
|
STRBUF##_free(void *xbuf) \
|
|
{ \
|
|
STRBUF##_cleanup(xbuf); \
|
|
xfree(xbuf); \
|
|
} \
|
|
\
|
|
const struct STRBUF STRBUF##_init /* = STRBUF##_INIT; */
|
|
|
|
DO_STRBUF(strbuf, char, strlen);
|
|
DO_STRBUF(Strbuf, Char, Strlen);
|