kc3-lang/libpng/contrib/powerpc-vsx/linux.c

Branch - branch -libpng16libpng17

• Show log

  Commit

• Hash : 77c3a392
  Author :
  Date : 2022-11-20T21:23:33
  

  Clean up comments and whitespace characters in source files
  
  Remove all remaining "last changed" version info from source comments.
  (The version control system maintains this information automatically.)
  
  Delete the trailing whitespace characters.
  

Download

• contrib/powerpc-vsx/linux.c

• /* contrib/powerpc-vsx/linux.c
   *
   * Copyright (c) 2017 Glenn Randers-Pehrson
   * Written by Vadim Barkov, 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;
  }
  

Download