68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
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/* contrib/mips-msa/linux.c
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*
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* Copyright (c) 2020 Cosmin Truta
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* Copyright (c) 2016 Glenn Randers-Pehrson
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* Written by Mandar Sahastrabuddhe, 2016.
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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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* SEE contrib/mips-msa/README before reporting bugs
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*
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* STATUS: SUPPORTED
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* BUG REPORTS: png-mng-implement@sourceforge.net
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*
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* png_have_msa 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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static int
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png_have_msa(png_structp png_ptr)
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{
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FILE *f = fopen("/proc/cpuinfo", "rb");
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char *string = "msa";
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char word[10];
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if (f != NULL)
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{
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while(!feof(f))
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{
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int ch = fgetc(f);
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static int i = 0;
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while(!(ch <= 32))
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{
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word[i++] = ch;
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ch = fgetc(f);
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}
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int val = strcmp(string, word);
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if (val == 0) {
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fclose(f);
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return 1;
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}
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i = 0;
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memset(word, 0, 10);
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}
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fclose(f);
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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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