gdbsupport/rsp-low.h

   1 /* Low-level RSP routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 1988-2023 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef COMMON_RSP_LOW_H
  21 #define COMMON_RSP_LOW_H
  22
  23 /* Convert number NIB to a hex digit.  */
  24
  25 extern int tohex (int nib);
  26
  27 /* Write a character representing the low order four bits of NIBBLE in
  28    hex to *BUF.  Returns BUF+1.  */
  29
  30 extern char *pack_nibble (char *buf, int nibble);
  31
  32 /* Write the low byte of BYTE in hex to *BUF.  Returns BUF+2.  */
  33
  34 extern char *pack_hex_byte (char *pkt, int byte);
  35
  36 /* Read hex digits from BUFF and convert to a number, which is stored
  37    in RESULT.  Reads until a non-hex digit is seen.  Returns a pointer
  38    to the terminating character.  */
  39
  40 extern const char *unpack_varlen_hex (const char *buff, ULONGEST *result);
  41
  42 /* Like hex2bin, but return a std::string.  */
  43
  44 extern std::string hex2str (const char *hex);
  45
  46 /* Like hex2bin, but return a std::string.  */
  47
  48 extern std::string hex2str (const char *hex, int count);
  49
  50 /* Convert some bytes to a hexadecimal representation.  BIN holds the
  51    bytes to convert.  COUNT says how many bytes to convert.  The
  52    resulting characters are stored in HEX, followed by a NUL
  53    character.  Returns the number of bytes actually converted.  */
  54
  55 extern int bin2hex (const gdb_byte *bin, char *hex, int count);
  56
  57 /* Overloaded version of bin2hex that returns a std::string.  */
  58
  59 extern std::string bin2hex (const gdb_byte *bin, int count);
  60
  61 /* Convert BUFFER, binary data at least LEN_UNITS addressable memory units
  62    long, into escaped binary data in OUT_BUF.  Only copy memory units that fit
  63    completely in OUT_BUF.  Set *OUT_LEN_UNITS to the number of units from
  64    BUFFER successfully encoded in OUT_BUF, and return the number of bytes used
  65    in OUT_BUF.  The total number of bytes in the output buffer will be at most
  66    OUT_MAXLEN_BYTES.  This function properly escapes '*', and so is suitable
  67    for the server side as well as the client.  */
  68
  69 extern int remote_escape_output (const gdb_byte *buffer, int len_units,
  70                                  int unit_size, gdb_byte *out_buf,
  71                                  int *out_len_units, int out_maxlen_bytes);
  72
  73 /* Convert BUFFER, escaped data LEN bytes long, into binary data
  74    in OUT_BUF.  Return the number of bytes written to OUT_BUF.
  75    Raise an error if the total number of bytes exceeds OUT_MAXLEN.
  76
  77    This function reverses remote_escape_output.  */
  78
  79 extern int remote_unescape_input (const gdb_byte *buffer, int len,
  80                                   gdb_byte *out_buf, int out_maxlen);
  81
  82 #endif /* COMMON_RSP_LOW_H */