424 lines
8.6 KiB
C
424 lines
8.6 KiB
C
/* $Header: /src/pub/tcsh/tc.str.c,v 3.10 2002/03/08 17:36:47 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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RCSID("$Id: tc.str.c,v 3.10 2002/03/08 17:36:47 christos Exp $")
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#define MALLOC_INCR 128
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#ifdef SHORT_STRINGS
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Char **
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blk2short(src)
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register char **src;
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{
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size_t n;
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register 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 = (Char **) xmalloc((size_t) ((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(src)
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register Char **src;
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{
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size_t n;
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register 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 = (char **) xmalloc((size_t) ((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(src)
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register const char *src;
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{
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static Char *sdst;
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static size_t dstsize = 0;
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register 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 = (Char *) xmalloc((size_t) (dstsize * sizeof(Char)));
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}
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dst = sdst;
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edst = &dst[dstsize];
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while ((unsigned char) *src) {
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*dst++ = (Char) ((unsigned char) *src++);
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if (dst == edst) {
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dstsize += MALLOC_INCR;
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sdst = (Char *) xrealloc((ptr_t) sdst,
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(size_t) (dstsize * 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 = 0;
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return (sdst);
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}
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char *
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short2str(src)
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register 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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register 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 = (char *) xmalloc((size_t) (dstsize * 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++ = (char) *src++;
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if (dst == edst) {
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dstsize += MALLOC_INCR;
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sdst = (char *) xrealloc((ptr_t) sdst,
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(size_t) (dstsize * 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 = 0;
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return (sdst);
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}
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Char *
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s_strcpy(dst, src)
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register Char *dst;
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register const Char *src;
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{
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register 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(dst, src, n)
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register Char *dst;
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register const Char *src;
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register size_t n;
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{
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register 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(dst, src)
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register Char *dst;
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register const Char *src;
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{
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register short *sdst;
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sdst = dst;
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while (*dst++)
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continue;
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--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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#ifdef NOTUSED
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Char *
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s_strncat(dst, src, n)
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register Char *dst;
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register const Char *src;
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register size_t n;
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{
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register 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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continue;
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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(str, ch)
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register const Char *str;
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int ch;
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{
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do
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if (*str == ch)
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return ((Char *) 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(str, ch)
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register const Char *str;
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int ch;
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{
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register 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 *) rstr);
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}
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size_t
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s_strlen(str)
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register const Char *str;
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{
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register 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(str1, str2)
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register const Char *str1, *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(str1, str2, n)
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register const Char *str1, *str2;
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register 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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Char *
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s_strsave(s)
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register const Char *s;
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{
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Char *n;
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register Char *p;
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if (s == 0)
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s = STRNULL;
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for (p = (Char *) s; *p++;)
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continue;
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n = p = (Char *) xmalloc((size_t)
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((((const Char *) p) - s) * sizeof(Char)));
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while ((*p++ = *s++) != '\0')
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continue;
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return (n);
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}
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Char *
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s_strspl(cp, dp)
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const Char *cp, *dp;
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{
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Char *ep;
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register 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 = (Char *) cp; *p++;)
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continue;
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for (q = (Char *) dp; *q++;)
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continue;
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ep = (Char *) xmalloc((size_t)
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(((((const Char *) p) - cp) +
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(((const Char *) q) - dp) - 1) * sizeof(Char)));
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for (p = ep, q = (Char*) cp; (*p++ = *q++) != '\0';)
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continue;
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for (p--, q = (Char *) dp; (*p++ = *q++) != '\0';)
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continue;
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return (ep);
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}
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Char *
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s_strend(cp)
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register const Char *cp;
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{
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if (!cp)
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return ((Char *) cp);
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while (*cp)
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cp++;
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return ((Char *) cp);
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}
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Char *
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s_strstr(s, t)
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register const Char *s, *t;
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{
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do {
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register const Char *ss = s;
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register const Char *tt = t;
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do
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if (*tt == '\0')
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return ((Char *) 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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#endif /* SHORT_STRINGS */
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char *
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short2qstr(src)
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register 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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register 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 = (char *) xmalloc((size_t) (dstsize * 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 = (char *) xrealloc((ptr_t) sdst,
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(size_t) (dstsize * 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++ = (char) *src++;
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if (dst == edst) {
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dstsize += MALLOC_INCR;
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sdst = (char *) xrealloc((ptr_t) sdst,
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(size_t) (dstsize * 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 = 0;
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return (sdst);
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}
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