gdbsupport/rsp-low.h

   1 /* Low-level RSP routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 1988-2020 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 #include "gdbsupport/byte-vector.h"
  24
  25 /* Convert hex digit A to a number, or throw an exception.  */
  26
  27 extern int fromhex (int a);
  28
  29 /* Convert number NIB to a hex digit.  */
  30
  31 extern int tohex (int nib);
  32
  33 /* Write a character representing the low order four bits of NIBBLE in
  34    hex to *BUF.  Returns BUF+1.  */
  35
  36 extern char *pack_nibble (char *buf, int nibble);
  37
  38 /* Write the low byte of BYTE in hex to *BUF.  Returns BUF+2.  */
  39
  40 extern char *pack_hex_byte (char *pkt, int byte);
  41
  42 /* Read hex digits from BUFF and convert to a number, which is stored
  43    in RESULT.  Reads until a non-hex digit is seen.  Returns a pointer
  44    to the terminating character.  */
  45
  46 extern const char *unpack_varlen_hex (const char *buff, ULONGEST *result);
  47
  48 /* HEX is a string of characters representing hexadecimal digits.
  49    Convert pairs of hex digits to bytes and store sequentially into
  50    BIN.  COUNT is the maximum number of characters to convert.  This
  51    will convert fewer characters if the number of hex characters
  52    actually seen is odd, or if HEX terminates before COUNT characters.
  53    Returns the number of characters actually converted.  */
  54
  55 extern int hex2bin (const char *hex, gdb_byte *bin, int count);
  56
  57 /* Like the above, but return a gdb::byte_vector.  */
  58
  59 gdb::byte_vector hex2bin (const char *hex);
  60
  61 /* Like hex2bin, but return a std::string.  */
  62
  63 extern std::string hex2str (const char *hex);
  64
  65 /* Like hex2bin, but return a std::string.  */
  66
  67 extern std::string hex2str (const char *hex, int count);
  68
  69 /* Convert some bytes to a hexadecimal representation.  BIN holds the
  70    bytes to convert.  COUNT says how many bytes to convert.  The
  71    resulting characters are stored in HEX, followed by a NUL
  72    character.  Returns the number of bytes actually converted.  */
  73
  74 extern int bin2hex (const gdb_byte *bin, char *hex, int count);
  75
  76 /* Overloaded version of bin2hex that returns a std::string.  */
  77
  78 extern std::string bin2hex (const gdb_byte *bin, int count);
  79
  80 /* Convert BUFFER, binary data at least LEN_UNITS addressable memory units
  81    long, into escaped binary data in OUT_BUF.  Only copy memory units that fit
  82    completely in OUT_BUF.  Set *OUT_LEN_UNITS to the number of units from
  83    BUFFER successfully encoded in OUT_BUF, and return the number of bytes used
  84    in OUT_BUF.  The total number of bytes in the output buffer will be at most
  85    OUT_MAXLEN_BYTES.  This function properly escapes '*', and so is suitable
  86    for the server side as well as the client.  */
  87
  88 extern int remote_escape_output (const gdb_byte *buffer, int len_units,
  89                                  int unit_size, gdb_byte *out_buf,
  90                                  int *out_len_units, int out_maxlen_bytes);
  91
  92 /* Convert BUFFER, escaped data LEN bytes long, into binary data
  93    in OUT_BUF.  Return the number of bytes written to OUT_BUF.
  94    Raise an error if the total number of bytes exceeds OUT_MAXLEN.
  95
  96    This function reverses remote_escape_output.  */
  97
  98 extern int remote_unescape_input (const gdb_byte *buffer, int len,
  99                                   gdb_byte *out_buf, int out_maxlen);
 100
 101 #endif /* COMMON_RSP_LOW_H */