text: /* zutil.c -- target dependent utility functions for the compression library
   * Copyright (C) 1995-2017 Jean-loup Gailly
   * For conditions of distribution and use, see copyright notice in zlib.h
   */
  
  #include "zbuild.h"
  #include "zutil.h"
  #ifdef WITH_GZFILEOP
  #  include "gzguts.h"
  #endif
  
  const char * const zng_errmsg[10] = {
      (const char *)"need dictionary",     /* Z_NEED_DICT       2  */
      (const char *)"stream end",          /* Z_STREAM_END      1  */
      (const char *)"",                    /* Z_OK              0  */
      (const char *)"file error",          /* Z_ERRNO         (-1) */
      (const char *)"stream error",        /* Z_STREAM_ERROR  (-2) */
      (const char *)"data error",          /* Z_DATA_ERROR    (-3) */
      (const char *)"insufficient memory", /* Z_MEM_ERROR     (-4) */
      (const char *)"buffer error",        /* Z_BUF_ERROR     (-5) */
      (const char *)"incompatible version",/* Z_VERSION_ERROR (-6) */
      (const char *)""
  };
  
  const char zlibng_string[] =
      " zlib-ng 1.9.9 forked from zlib 1.2.11 ";
  
  #ifdef ZLIB_COMPAT
  const char * ZEXPORT zlibVersion(void) {
      return ZLIB_VERSION;
  }
  #endif
  
  const char * ZEXPORT zlibng_version(void) {
      return ZLIBNG_VERSION;
  }
  
  unsigned long ZEXPORT PREFIX(zlibCompileFlags)(void) {
      unsigned long flags;
  
      flags = 0;
      switch ((int)(sizeof(unsigned int))) {
      case 2:     break;
      case 4:     flags += 1;     break;
      case 8:     flags += 2;     break;
      default:    flags += 3;
      }
      switch ((int)(sizeof(unsigned long))) {
      case 2:     break;
      case 4:     flags += 1 << 2;        break;
      case 8:     flags += 2 << 2;        break;
      default:    flags += 3 << 2;
      }
      switch ((int)(sizeof(void *))) {
      case 2:     break;
      case 4:     flags += 1 << 4;        break;
      case 8:     flags += 2 << 4;        break;
      default:    flags += 3 << 4;
      }
      switch ((int)(sizeof(z_off_t))) {
      case 2:     break;
      case 4:     flags += 1 << 6;        break;
      case 8:     flags += 2 << 6;        break;
      default:    flags += 3 << 6;
      }
  #ifdef ZLIB_DEBUG
      flags += 1 << 8;
  #endif
  #ifdef ZLIB_WINAPI
      flags += 1 << 10;
  #endif
  #ifdef DYNAMIC_CRC_TABLE
      flags += 1 << 13;
  #endif
  #ifdef NO_GZCOMPRESS
      flags += 1L << 16;
  #endif
  #ifdef NO_GZIP
      flags += 1L << 17;
  #endif
  #ifdef PKZIP_BUG_WORKAROUND
      flags += 1L << 20;
  #endif
      return flags;
  }
  
  #ifdef ZLIB_DEBUG
  #  include <stdlib.h>
  #  ifndef verbose
  #    define verbose 0
  #  endif
  int ZLIB_INTERNAL z_verbose = verbose;
  
  void ZLIB_INTERNAL z_error(char *m) {
      fprintf(stderr, "%s\n", m);
      exit(1);
  }
  #endif
  
  /* exported to allow conversion of error code to string for compress() and
   * uncompress()
   */
  const char * ZEXPORT PREFIX(zError)(int err) {
      return ERR_MSG(err);
  }
  
  #ifndef MY_ZCALLOC /* Any system without a special alloc function */
  
  #ifndef UNALIGNED_OK
  #  include <malloc.h>
  #  if defined(_WIN32)
  #    define zng_align_alloc(align, size) _aligned_malloc(size, align)
  #    define zng_align_free(ptr)          _aligned_free(ptr)
  #  else
  #    define zng_align_alloc              memalign
  #    define zng_align_free(ptr)          free(ptr)
  #  endif
  #endif
  
  void ZLIB_INTERNAL *zng_calloc(void *opaque, unsigned items, unsigned size)
  {
      (void)opaque;
  #ifndef UNALIGNED_OK
      return zng_align_alloc(16, items * size);
  #else
      return sizeof(unsigned int) > 2 ? (void *)malloc(items * size) :
                                (void *)calloc(items, size);
  #endif
  }
  
  void ZLIB_INTERNAL zng_cfree(void *opaque, void *ptr) {
      (void)opaque;
  #ifndef UNALIGNED_OK
      zng_align_free(ptr);
  #else
      free(ptr);
  #endif
  }
  
  #endif /* MY_ZCALLOC */
  