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pcg |
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/*--------------------------------*-C-*---------------------------------* |
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* File: strings.c |
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*----------------------------------------------------------------------* |
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* $Id: strings.C,v 1.1 2003/11/18 14:22:18 root Exp $ |
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* |
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* All portions of code are copyright by their respective author/s. |
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* Copyright (c) 1997-2001 Geoff Wing <gcw@pobox.com> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*----------------------------------------------------------------------*/ |
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#include "../config.h" /* NECESSARY */ |
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#include "rxvt.h" /* NECESSARY */ |
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#include "strings.intpro" /* PROTOS for internal routines */ |
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#ifndef NO_STRINGS |
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/*----------------------------------------------------------------------*/ |
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/* |
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* a replacement for strcasecmp() to avoid linking an entire library. |
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* Mark Olesen added this in 2.15 but for which OS & library? - Geoff Wing |
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*/ |
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/* EXTPROTO */ |
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int |
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strcasecmp(const char *s1, const char *s2) |
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{ |
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for ( ; tolower(*s1) == tolower(*s2); s1++, s2++) |
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if (!*s1) |
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return 0; |
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return (int)(tolower(*s1) - tolower(*s2)); |
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} |
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/* EXTPROTO */ |
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int |
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strncasecmp(const char *s1, const char *s2, size_t n) |
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{ |
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for ( ; n-- && (tolower(*s1) == tolower(*s2)); s1++, s2++) |
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if (!*s1) |
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return 0; |
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if (n == 0) |
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return 0; |
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return (int)(tolower(*s1) - tolower(*s2)); |
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} |
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/* EXTPROTO */ |
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char * |
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strcpy(char *d, const char *s) |
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{ |
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char *r = d; |
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for ( ; (*r++ = *s++) != '\0'; ) ; |
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return d; |
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} |
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/* EXTPROTO */ |
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char * |
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strncpy(char *d, const char *s, size_t len) |
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{ |
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char *r = d; |
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if (len) |
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for ( ; len; len--) |
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if ((*r++ = *s++) == '\0') { |
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for ( ; --len; ) |
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*r++ = '\0'; |
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break; |
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} |
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return d; |
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} |
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/* EXTPROTO */ |
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int |
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strcmp(const char *s1, const char *s2) |
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{ |
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for ( ; (*s1 == *s2++); ) |
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if (*s1++ == '\0') |
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return 0; |
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return (int) ((unsigned char) *s1 - (unsigned char) *--s2); |
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} |
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/* EXTPROTO */ |
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int |
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strncmp(const char *s1, const char *s2, size_t len) |
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{ |
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if (len) { |
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for ( ; len-- && (*s1++ == *s2++); ) ; |
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if (++len) |
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return (int) ((unsigned char) *--s1 - (unsigned char) *--s2); |
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} |
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return 0; |
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} |
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/* EXTPROTO */ |
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char * |
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strcat(char *s1, const char *s2) |
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{ |
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char *r = s1; |
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if (*r != '\0') |
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for ( ; *++r != '\0'; ) ; |
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for ( ; (*r++ = *s2++) != '\0'; ) ; |
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return s1; |
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} |
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/* EXTPROTO */ |
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char * |
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strncat(char *s1, const char *s2, size_t len) |
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{ |
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char *r = s1; |
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if (*r != '\0') |
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for ( ; *++r != '\0'; ) ; |
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for ( ; len-- && ((*r++ = *s2++) != '\0'); ) ; |
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*r = '\0'; |
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return s1; |
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} |
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/* EXTPROTO */ |
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size_t |
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strlen(const char *s) |
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{ |
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size_t len = 0; |
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for ( ; *s++ != '\0'; len++) ; |
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return len; |
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} |
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/* EXTPROTO */ |
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char * |
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strdup(const char *s) |
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{ |
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size_t len = STRLEN(s) + 1; |
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char *c; |
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if ((c = malloc(len)) != NULL) |
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MEMCPY(c, s, len); |
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return c; |
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} |
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/* EXTPROTO */ |
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char * |
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index(const char *s, int c) |
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{ |
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return STRCHR(s, c); |
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} |
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/* EXTPROTO */ |
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char * |
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strchr(const char *s, int c) |
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{ |
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char *p = NULL; |
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for (;;) { |
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if (*s == (char)c) { |
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p = (char *)s; |
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break; |
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} |
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if (*s++ == '\0') |
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break; |
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} |
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return p; |
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} |
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/* EXTPROTO */ |
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char * |
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rindex(const char *s, int c) |
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{ |
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return STRRCHR(s, c); |
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} |
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/* EXTPROTO */ |
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char * |
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strrchr(const char *s, int c) |
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{ |
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char *p = NULL; |
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for (;;) { |
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if (*s == (char)c) |
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p = (char *)s; |
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if (*s++ == '\0') |
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break; |
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} |
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return p; |
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} |
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/* EXTPROTO */ |
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void * |
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memcpy(void *s1, const void *s2, size_t len) |
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{ |
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/* has extra stack and time but less code space */ |
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return MEMMOVE(s1, s2, len); |
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} |
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/*--------------------------------------------------------------------------* |
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* Possibly faster memmove() by Geoff Wing <mason@primenet.com.au> |
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*--------------------------------------------------------------------------*/ |
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/* EXTPROTO */ |
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void * |
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memmove(void *d, const void *s, size_t len) |
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{ |
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u_intp_t i; |
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unsigned char *dst = (unsigned char *)d; |
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const unsigned char *src = (const unsigned char *)s; |
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if (len && d != s) { |
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if ((u_intp_t)d < (u_intp_t)s) { |
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/* forwards */ |
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i = (-(u_intp_t)dst) & (SIZEOF_INT_P - 1); |
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if (len >= 16 && i == ((-(u_intp_t)src) & (SIZEOF_INT_P - 1))) { |
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/* speed up since src & dst are offset correctly */ |
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len -= (size_t)i; |
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for ( ; i--; ) |
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*dst++ = *src++; |
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for (i = (u_intp_t)(len / SIZEOF_INT_P); i--; ) |
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*((u_intp_t *)dst)++ = *((const u_intp_t *)src)++; |
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len &= (SIZEOF_INT_P - 1); |
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} |
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for ( ; len--; ) |
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*dst++ = *src++; |
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} else { |
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/* backwards */ |
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dst += len; |
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src += len; |
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i = ((u_intp_t)dst) & (SIZEOF_INT_P - 1); |
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if (len >= 16 && i == (((u_intp_t)src) & (SIZEOF_INT_P - 1))) { |
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/* speed up since src & dst are offset correctly */ |
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len -= (size_t)i; |
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for ( ; i--; ) |
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*--dst = *--src; |
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for (i = (u_intp_t)(len / SIZEOF_INT_P); i--; ) |
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*--((u_intp_t *)dst) = *--((const u_intp_t *)src); |
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len &= (SIZEOF_INT_P - 1); |
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} |
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for ( ; len--; ) |
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*--dst = *--src; |
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} |
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} |
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return d; |
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} |
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/*--------------------------------------------------------------------------* |
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* Possibly faster memset() by Geoff Wing <mason@primenet.com.au> |
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* presumptions: |
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* 1) intp_t write the best |
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* 2) SIZEOF_INT_P == power of 2 |
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*--------------------------------------------------------------------------*/ |
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/* EXTPROTO */ |
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void |
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bzero(void *b, size_t len) |
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{ |
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MEMSET(b, 0, len); |
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} |
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/* EXTPROTO */ |
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void * |
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memset(void *p, int c1, size_t len) |
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{ |
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u_intp_t i, val; |
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unsigned char c = (unsigned char) c1; |
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unsigned char *lp = (unsigned char *) p; |
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if (len) { |
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if (len >= 16) { /* < 16 probably not worth all the calculations */ |
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/* write out preceding characters so we align on an integer boundary */ |
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if ((i = ((-(u_intp_t)p) & (SIZEOF_INT_P - 1)))) { |
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len -= (size_t)i; |
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for (; i--;) |
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*lp++ = c; |
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} |
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/* do the fast writing */ |
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val = (c << 8) + c; |
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#if SIZEOF_INT_P >= 4 |
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val |= (val << 16); |
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#endif |
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#if SIZEOF_INT_P >= 8 |
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val |= (val << 32); |
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#endif |
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#if SIZEOF_INT_P == 16 |
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val |= (val << 64); |
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#endif |
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for (i = (u_intp_t)(len / SIZEOF_INT_P); i--;) |
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*((u_intp_t *)lp)++ = val; |
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len &= (SIZEOF_INT_P - 1); |
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} |
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/* write trailing characters */ |
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for (; len--;) |
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*lp++ = c; |
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} |
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return p; |
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} |
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#endif |
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/*----------------------- end-of-file (C source) -----------------------*/ |