kc3-lang/libjpeg-turbo/md5/md5hl.c

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• Hash : 293263c3
  Author :
  Date : 2018-03-17T15:14:35
  

  Format preprocessor macros more consistently
  
  Within the libjpeg API code, it seems to be more the convention than not
  to separate the macro name and value by two or more spaces, which
  improves general readability.  Making this consistent across all of
  libjpeg-turbo is less about my individual preferences and more about
  making it easy to automatically detect variations from our chosen
  formatting convention.  I intend to release the script I'm using to
  validate this stuff, once it matures and stabilizes a bit.
  

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• md5/md5hl.c

• /* mdXhl.c
   * ----------------------------------------------------------------------------
   * "THE BEER-WARE LICENSE" (Revision 42):
   * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
   * can do whatever you want with this stuff. If we meet some day, and you think
   * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
   * ----------------------------------------------------------------------------
   * libjpeg-turbo Modifications:
   * Copyright (C) 2016, D. R. Commander.
   * Modifications are under the same license as the original code (see above)
   * ----------------------------------------------------------------------------
   */
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <fcntl.h>
  #ifdef _WIN32
  #include <io.h>
  #define close  _close
  #define fstat  _fstat
  #define lseek  _lseek
  #define read  _read
  #define stat  _stat
  #else
  #include <unistd.h>
  #endif
  
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  #define LENGTH  16
  
  #include "./md5.h"
  
  char *MD5End(MD5_CTX *ctx, char *buf)
  {
    int i;
    unsigned char digest[LENGTH];
    static const char hex[] = "0123456789abcdef";
  
    if (!buf)
      buf = malloc(2 * LENGTH + 1);
    if (!buf)
      return 0;
    MD5Final(digest, ctx);
    for (i = 0; i < LENGTH; i++) {
      buf[i + i] = hex[digest[i] >> 4];
      buf[i + i + 1] = hex[digest[i] & 0x0f];
    }
    buf[i + i] = '\0';
    return buf;
  }
  
  char *MD5File(const char *filename, char *buf)
  {
    return (MD5FileChunk(filename, buf, 0, 0));
  }
  
  char *MD5FileChunk(const char *filename, char *buf, off_t ofs, off_t len)
  {
    unsigned char buffer[BUFSIZ];
    MD5_CTX ctx;
    struct stat stbuf;
    int f, i, e;
    off_t n;
  
    MD5Init(&ctx);
  #if _WIN32
    f = _open(filename, O_RDONLY | O_BINARY);
  #else
    f = open(filename, O_RDONLY);
  #endif
    if (f < 0)
      return 0;
    if (fstat(f, &stbuf) < 0)
      return 0;
    if (ofs > stbuf.st_size)
      ofs = stbuf.st_size;
    if ((len == 0) || (len > stbuf.st_size - ofs))
      len = stbuf.st_size - ofs;
    if (lseek(f, ofs, SEEK_SET) < 0)
      return 0;
    n = len;
    i = 0;
    while (n > 0) {
      if (n > sizeof(buffer))
        i = read(f, buffer, sizeof(buffer));
      else
        i = read(f, buffer, n);
      if (i < 0)
        break;
      MD5Update(&ctx, buffer, i);
      n -= i;
    }
    e = errno;
    close(f);
    errno = e;
    if (i < 0)
      return 0;
    return (MD5End(&ctx, buf));
  }
  
  char *MD5Data(const void *data, unsigned int len, char *buf)
  {
    MD5_CTX ctx;
  
    MD5Init(&ctx);
    MD5Update(&ctx, data, len);
    return (MD5End(&ctx, buf));
  }
  

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