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/* versions.c - handling standard version numbers
Copyright 1988-2017 Free Software Foundation, Inc.
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 3, 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., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include <config.h>
#include "a2ps.h"
#include "versions.h"
#include "quotearg.h"
#include "routines.h"
/************************************************************************/
/* The version handling */
/************************************************************************/
void
version_set_to_null (version_t version)
{
size_t n;
for (n = 0 ; n < VERSION_LENGTH ; n++)
version[n] = 0;
}
bool
version_null_p (version_t version)
{
size_t n;
for (n = 0 ; n < VERSION_LENGTH ; n++)
if (version[n])
return false;
return true;
}
int
version_cmp (version_t v1, version_t v2)
{
int n;
for (n = 0 ; n < VERSION_LENGTH ; n++)
if (v1[n] < v2[n])
return -1;
else if (v1[n] > v2[n])
return 1;
return 0;
}
void
version_cpy (version_t d, version_t s)
{
memcpy (d, s, VERSION_LENGTH * sizeof(s[0]));
}
void
version_self_print (version_t version, FILE * stream)
{
if (version[2])
fprintf (stream, "%d.%d%c",
version[0], version[1], version[2]);
else
fprintf (stream, "%d.%d",
version[0], version[1]);
}
/*
* Return the length occupied by this version number once printed
*/
size_t
version_length (version_t version)
{
#define short_int_len(_i_) ((_i_) < 10 ? 1 : 2)
if (version[2])
return 2U
+ short_int_len(version[0])
+ short_int_len(version[1])
+ 1U;
else
return 1U
+ short_int_len(version[0])
+ short_int_len(version[1]);
}
void
version_add (version_t v1, version_t v2)
{
int n;
for (n = 0 ; n < VERSION_LENGTH ; n++)
v1[n] += v2[n];
}
/*
* Valid versions numbers are:
* digit.digit
* digit.digitchar
*/
void
string_to_version (const char * version_string, version_t version)
{
char d;
switch (sscanf (version_string, "%d.%d%c",
&(version[0]), &(version[1]), &d))
{
case 2:
version[2] = 0;
break;
case VERSION_LENGTH:
version[2] = d - 'a' + 1;
break;
default:
error (1, 0,
_("invalid version number `%s'"), quotearg (version_string));
break;
};
}
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