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[common] added stringutils with alloc_sprintf helper

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This commit is contained in:
Geoffrey McRae 2019-05-21 11:30:57 +10:00
parent d9b6d115d1
commit b9841351b4
4 changed files with 75 additions and 1 deletions
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2
VERSION
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@ -1 +1 @@
a12-190-gcc6dd58778+1 a12-192-gbeed03eb33+1

1
common/CMakeLists.txt
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@ -6,6 +6,7 @@ include_directories(
) )
set(SOURCES set(SOURCES
src/stringutils.c
src/stringlist.c src/stringlist.c
src/option.c src/option.c
) )

21
common/include/common/stringutils.h Normal file
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@ -0,0 +1,21 @@
/*
KVMGFX Client - A KVM Client for VGA Passthrough
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
// sprintf but with buffer allocation
int alloc_sprintf(char ** str, const char * format, ...);

52
common/src/stringutils.c Normal file
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/*
KVMGFX Client - A KVM Client for VGA Passthrough
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
int alloc_sprintf(char ** str, const char * format, ...)
{
if (!str)
return -1;
*str = NULL;
va_list ap;
va_start(ap, format);
int len = vsnprintf(NULL, 0, format, ap);
va_end(ap);
if (len < 0)
return len;
*str = malloc(len+1);
va_start(ap, format);
int ret = vsnprintf(*str, len + 1, format, ap);
va_end(ap);
if (ret < 0)
{
free(*str);
*str = NULL;
return ret;
}
return ret;
}