mirror of
https://github.com/Aigor44/ncursesw-morphos.git
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140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/****************************************************************************
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* Copyright (c) 2000 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Thomas E. Dickey *
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****************************************************************************/
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/*
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** lib_mvcur.c
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**/
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#include <curses.priv.h>
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MODULE_ID("$Id")
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/****************************************************************************
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* Useful string functions (especially for mvcur)
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****************************************************************************/
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#if !HAVE_STRSTR
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char *
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_nc_strstr(const char *haystack, const char *needle)
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{
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size_t len1 = strlen(haystack);
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size_t len2 = strlen(needle);
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char *result = 0;
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while ((len1 != 0) && (len1-- >= len2)) {
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if (!strncmp(haystack, needle, len2)) {
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result = haystack;
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break;
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}
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haystack++;
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}
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return result;
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}
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#endif
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/*
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* Initialize the descriptor so we can append to it.
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*/
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string_desc *
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_nc_str_init(string_desc * dst, char *src, size_t len)
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{
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if (dst != 0) {
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dst->s_head = src;
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dst->s_tail = src;
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dst->s_size = len - 1;
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if (src != 0)
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*src = 0;
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}
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return dst;
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}
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/*
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* Initialize the descriptor for only tracking the amount of memory used.
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*/
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string_desc *
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_nc_str_null(string_desc * dst, size_t len)
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{
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return _nc_str_init(dst, 0, len);
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}
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/*
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* Copy a descriptor
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*/
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string_desc *
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_nc_str_copy(string_desc * dst, string_desc * src)
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{
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*dst = *src;
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return dst;
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}
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/*
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* Replaces strcat into a fixed buffer, returning false on failure.
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*/
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bool
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_nc_safe_strcat(string_desc * dst, const char *src)
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{
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if (src != 0) {
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size_t len = strlen(src);
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if (len < dst->s_size) {
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if (dst->s_tail != 0) {
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strcpy(dst->s_tail, src);
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dst->s_tail += len;
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}
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dst->s_size -= len;
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return TRUE;
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}
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}
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return FALSE;
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}
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/*
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* Replaces strcpy into a fixed buffer, returning false on failure.
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*/
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bool
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_nc_safe_strcpy(string_desc * dst, const char *src)
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{
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if (src != 0) {
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size_t len = strlen(src);
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if (len < dst->s_size) {
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if (dst->s_head != 0) {
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strcpy(dst->s_head, src);
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dst->s_tail = dst->s_head + len;
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}
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dst->s_size -= len;
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return TRUE;
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}
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}
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return FALSE;
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}
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