1 /* Low-level RSP routines for GDB, the GNU debugger.
3 Copyright (C) 1988-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
20 #ifndef COMMON_RSP_LOW_H
21 #define COMMON_RSP_LOW_H
23 #include "gdbsupport/byte-vector.h"
25 /* Convert hex digit A to a number, or throw an exception. */
27 extern int fromhex (int a
);
29 /* Convert number NIB to a hex digit. */
31 extern int tohex (int nib
);
33 /* Write a character representing the low order four bits of NIBBLE in
34 hex to *BUF. Returns BUF+1. */
36 extern char *pack_nibble (char *buf
, int nibble
);
38 /* Write the low byte of BYTE in hex to *BUF. Returns BUF+2. */
40 extern char *pack_hex_byte (char *pkt
, int byte
);
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. */
46 extern const char *unpack_varlen_hex (const char *buff
, ULONGEST
*result
);
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. */
55 extern int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
57 /* Like the above, but return a gdb::byte_vector. */
59 gdb::byte_vector
hex2bin (const char *hex
);
61 /* Like hex2bin, but return a std::string. */
63 extern std::string
hex2str (const char *hex
);
65 /* Like hex2bin, but return a std::string. */
67 extern std::string
hex2str (const char *hex
, int count
);
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. */
74 extern int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
76 /* Overloaded version of bin2hex that returns a std::string. */
78 extern std::string
bin2hex (const gdb_byte
*bin
, int count
);
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. */
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
);
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.
96 This function reverses remote_escape_output. */
98 extern int remote_unescape_input (const gdb_byte
*buffer
, int len
,
99 gdb_byte
*out_buf
, int out_maxlen
);
101 #endif /* COMMON_RSP_LOW_H */
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