58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/* contrib/powerpc-vsx/linux.c
|
|
*
|
|
* Copyright (c) 2017 Glenn Randers-Pehrson
|
|
* Written by Vadim Barkov, 2017.
|
|
* Last changed in libpng 1.6.29 [March 16, 2017]
|
|
*
|
|
* This code is released under the libpng license.
|
|
* For conditions of distribution and use, see the disclaimer
|
|
* and license in png.h
|
|
*
|
|
* STATUS: TESTED
|
|
* BUG REPORTS: png-mng-implement@sourceforge.net
|
|
*
|
|
* png_have_vsx implemented for Linux by reading the widely available
|
|
* pseudo-file /proc/cpuinfo.
|
|
*
|
|
* This code is strict ANSI-C and is probably moderately portable; it does
|
|
* however use <stdio.h> and it assumes that /proc/cpuinfo is never localized.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "png.h"
|
|
|
|
#ifndef MAXLINE
|
|
# define MAXLINE 1024
|
|
#endif
|
|
|
|
static int
|
|
png_have_vsx(png_structp png_ptr)
|
|
{
|
|
FILE *f;
|
|
|
|
const char *string = "altivec supported";
|
|
char input[MAXLINE];
|
|
char *token = NULL;
|
|
|
|
PNG_UNUSED(png_ptr)
|
|
|
|
f = fopen("/proc/cpuinfo", "r");
|
|
if (f != NULL)
|
|
{
|
|
memset(input,0,MAXLINE);
|
|
while(fgets(input,MAXLINE,f) != NULL)
|
|
{
|
|
token = strstr(input,string);
|
|
if(token != NULL)
|
|
return 1;
|
|
}
|
|
}
|
|
#ifdef PNG_WARNINGS_SUPPORTED
|
|
else
|
|
png_warning(png_ptr, "/proc/cpuinfo open failed");
|
|
#endif
|
|
return 0;
|
|
}
|