| /* contrib/mips-msa/linux.c |
| * |
| * Copyright (c) 2016 Glenn Randers-Pehrson |
| * Written by Mandar Sahastrabuddhe, 2016. |
| * Last changed in libpng 1.6.25beta03 [August 29, 2016] |
| * |
| * This code is released under the libpng license. |
| * For conditions of distribution and use, see the disclaimer |
| * and license in png.h |
| * |
| * SEE contrib/mips-msa/README before reporting bugs |
| * |
| * STATUS: SUPPORTED |
| * BUG REPORTS: png-mng-implement@sourceforge.net |
| * |
| * png_have_msa 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> |
| |
| static int |
| png_have_msa(png_structp png_ptr) |
| { |
| FILE *f = fopen("/proc/cpuinfo", "rb"); |
| |
| char *string = "msa"; |
| char word[10]; |
| |
| if (f != NULL) |
| { |
| while(!feof(f)) |
| { |
| int ch = fgetc(f); |
| static int i = 0; |
| |
| while(!(ch <= 32)) |
| { |
| word[i++] = ch; |
| ch = fgetc(f); |
| } |
| |
| int val = strcmp(string, word); |
| |
| if (val == 0) |
| return 1; |
| |
| i = 0; |
| memset(word, 0, 10); |
| } |
| |
| fclose(f); |
| } |
| #ifdef PNG_WARNINGS_SUPPORTED |
| else |
| png_warning(png_ptr, "/proc/cpuinfo open failed"); |
| #endif |
| return 0; |
| } |