text: /* crypto/bio/b_dump.c */
  /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   *
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   *
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   *
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
   *
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   */
  
  /*
   * Stolen from tjh's ssl/ssl_trc.c stuff.
   */
  
  #include <stdio.h>
  #include "cryptlib.h"
  #include "bio_lcl.h"
  
  #define TRUNCATE
  #define DUMP_WIDTH      16
  #define DUMP_WIDTH_LESS_INDENT(i) (DUMP_WIDTH-((i-(i>6?6:i)+3)/4))
  
  int BIO_dump_cb(int (*cb) (const void *data, size_t len, void *u),
                  void *u, const char *s, int len)
  {
      return BIO_dump_indent_cb(cb, u, s, len, 0);
  }
  
  int BIO_dump_indent_cb(int (*cb) (const void *data, size_t len, void *u),
                         void *u, const char *s, int len, int indent)
  {
      int ret = 0;
      char buf[288 + 1], tmp[20], str[128 + 1];
      int i, j, rows, trc;
      unsigned char ch;
      int dump_width;
  
      trc = 0;
  
  #ifdef TRUNCATE
      for (; (len > 0) && ((s[len - 1] == ' ') || (s[len - 1] == '\0')); len--)
          trc++;
  #endif
  
      if (indent < 0)
          indent = 0;
      if (indent) {
          if (indent > 128)
              indent = 128;
          memset(str, ' ', indent);
      }
      str[indent] = '\0';
  
      dump_width = DUMP_WIDTH_LESS_INDENT(indent);
      rows = (len / dump_width);
      if ((rows * dump_width) < len)
          rows++;
      for (i = 0; i < rows; i++) {
          buf[0] = '\0';          /* start with empty string */
          BUF_strlcpy(buf, str, sizeof buf);
          BIO_snprintf(tmp, sizeof tmp, "%04x - ", i * dump_width);
          BUF_strlcat(buf, tmp, sizeof buf);
          for (j = 0; j < dump_width; j++) {
              if (((i * dump_width) + j) >= len) {
                  BUF_strlcat(buf, "   ", sizeof buf);
              } else {
                  ch = ((unsigned char)*(s + i * dump_width + j)) & 0xff;
                  BIO_snprintf(tmp, sizeof tmp, "%02x%c", ch,
                               j == 7 ? '-' : ' ');
                  BUF_strlcat(buf, tmp, sizeof buf);
              }
          }
          BUF_strlcat(buf, "  ", sizeof buf);
          for (j = 0; j < dump_width; j++) {
              if (((i * dump_width) + j) >= len)
                  break;
              ch = ((unsigned char)*(s + i * dump_width + j)) & 0xff;
  #ifndef CHARSET_EBCDIC
              BIO_snprintf(tmp, sizeof tmp, "%c",
                           ((ch >= ' ') && (ch <= '~')) ? ch : '.');
  #else
              BIO_snprintf(tmp, sizeof tmp, "%c",
                           ((ch >= os_toascii[' ']) && (ch <= os_toascii['~']))
                           ? os_toebcdic[ch]
                           : '.');
  #endif
              BUF_strlcat(buf, tmp, sizeof buf);
          }
          BUF_strlcat(buf, "\n", sizeof buf);
          /*
           * if this is the last call then update the ddt_dump thing so that we
           * will move the selection point in the debug window
           */
          ret += cb((void *)buf, strlen(buf), u);
      }
  #ifdef TRUNCATE
      if (trc > 0) {
          BIO_snprintf(buf, sizeof buf, "%s%04x - <SPACES/NULS>\n", str,
                       len + trc);
          ret += cb((void *)buf, strlen(buf), u);
      }
  #endif
      return (ret);
  }
  
  #ifndef OPENSSL_NO_FP_API
  static int write_fp(const void *data, size_t len, void *fp)
  {
      return UP_fwrite(data, len, 1, fp);
  }
  
  int BIO_dump_fp(FILE *fp, const char *s, int len)
  {
      return BIO_dump_cb(write_fp, fp, s, len);
  }
  
  int BIO_dump_indent_fp(FILE *fp, const char *s, int len, int indent)
  {
      return BIO_dump_indent_cb(write_fp, fp, s, len, indent);
  }
  #endif
  
  static int write_bio(const void *data, size_t len, void *bp)
  {
      return BIO_write((BIO *)bp, (const char *)data, len);
  }
  
  int BIO_dump(BIO *bp, const char *s, int len)
  {
      return BIO_dump_cb(write_bio, bp, s, len);
  }
  
  int BIO_dump_indent(BIO *bp, const char *s, int len, int indent)
  {
      return BIO_dump_indent_cb(write_bio, bp, s, len, indent);
  }
  
  int BIO_hex_string(BIO *out, int indent, int width, unsigned char *data,
                     int datalen)
  {
      int i, j = 0;
  
      if (datalen < 1)
          return 1;
  
      for (i = 0; i < datalen - 1; i++) {
          if (i && !j)
              BIO_printf(out, "%*s", indent, "");
  
          BIO_printf(out, "%02X:", data[i]);
  
          j = (j + 1) % width;
          if (!j)
              BIO_printf(out, "\n");
      }
  
      if (i && !j)
          BIO_printf(out, "%*s", indent, "");
      BIO_printf(out, "%02X", data[datalen - 1]);
      return 1;
  }
  