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