Repo created

TMessagesProj/jni/mozjpeg/md5/md5hl.c

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+/* 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, 2018-2019 D. R. Commander.  All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * - Neither the name of the libjpeg-turbo Project nor the names of its
+ *   contributors may be used to endorse or promote products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+#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"
+
+static 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);
+#ifdef _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));
+}