mirror of
https://github.com/gnif/LookingGlass.git
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92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include "common/stringutils.h"
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int valloc_sprintf(char ** str, const char * format, va_list ap)
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{
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if (!str)
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return -1;
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*str = NULL;
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va_list ap1;
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va_copy(ap1, ap);
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// for some reason some versions of GCC warn about format being NULL when any
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// kind of optimization is enabled, this is a false positive.
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wformat-truncation"
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const int len = vsnprintf(*str, 0, format, ap1);
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#pragma GCC diagnostic pop
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va_end(ap1);
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if (len < 0)
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return len;
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*str = malloc(len + 1);
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int ret = vsnprintf(*str, len + 1, format, ap);
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if (ret < 0)
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{
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free(*str);
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*str = NULL;
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return ret;
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}
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return ret;
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}
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int alloc_sprintf(char ** str, const char * format, ...)
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{
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va_list ap;
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va_start(ap, format);
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int ret = valloc_sprintf(str, format, ap);
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va_end(ap);
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return ret;
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}
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bool str_containsValue(const char * list, char delimiter, const char * value)
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{
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size_t len = strlen(value);
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const char span[] = {delimiter, '\0'};
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while (*list)
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{
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if (*list == delimiter)
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{
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++list;
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continue;
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}
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size_t n = strcspn(list, span);
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if (n == len && strncmp(value, list, n) == 0)
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return true;
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list += n;
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}
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return false;
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}
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