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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * parser.cpp - Parser for a GCode line, providing a parameter interface.
- */
-
- #include "parser.h"
-
- #include "../MarlinCore.h"
-
- #if HAS_MULTI_SERIAL
- #include "queue.h"
- #endif
-
- // Must be declared for allocation and to satisfy the linker
- // Zero values need no initialization.
-
- bool GCodeParser::volumetric_enabled;
-
- #if ENABLED(INCH_MODE_SUPPORT)
- float GCodeParser::linear_unit_factor, GCodeParser::volumetric_unit_factor;
- #endif
-
- #if ENABLED(TEMPERATURE_UNITS_SUPPORT)
- TempUnit GCodeParser::input_temp_units = TEMPUNIT_C;
- #endif
-
- char *GCodeParser::command_ptr,
- *GCodeParser::string_arg,
- *GCodeParser::value_ptr;
- char GCodeParser::command_letter;
- int GCodeParser::codenum;
-
- #if ENABLED(USE_GCODE_SUBCODES)
- uint8_t GCodeParser::subcode;
- #endif
-
- #if ENABLED(GCODE_MOTION_MODES)
- int16_t GCodeParser::motion_mode_codenum = -1;
- #if ENABLED(USE_GCODE_SUBCODES)
- uint8_t GCodeParser::motion_mode_subcode;
- #endif
- #endif
-
- #if ENABLED(FASTER_GCODE_PARSER)
- // Optimized Parameters
- uint32_t GCodeParser::codebits; // found bits
- uint8_t GCodeParser::param[26]; // parameter offsets from command_ptr
- #else
- char *GCodeParser::command_args; // start of parameters
- #endif
-
- // Create a global instance of the GCode parser singleton
- GCodeParser parser;
-
- /**
- * Clear all code-seen (and value pointers)
- *
- * Since each param is set/cleared on seen codes,
- * this may be optimized by commenting out ZERO(param)
- */
- void GCodeParser::reset() {
- string_arg = nullptr; // No whole line argument
- command_letter = '?'; // No command letter
- codenum = 0; // No command code
- TERN_(USE_GCODE_SUBCODES, subcode = 0); // No command sub-code
- #if ENABLED(FASTER_GCODE_PARSER)
- codebits = 0; // No codes yet
- //ZERO(param); // No parameters (should be safe to comment out this line)
- #endif
- }
-
- #if ENABLED(GCODE_QUOTED_STRINGS)
-
- // Pass the address after the first quote (if any)
- char* GCodeParser::unescape_string(char* &src) {
- if (*src == '"') ++src; // Skip the leading quote
- char * const out = src; // Start of the string
- char *dst = src; // Prepare to unescape and terminate
- for (;;) {
- char c = *src++; // Get the next char
- switch (c) {
- case '\\': c = *src++; break; // Get the escaped char
- case '"' : c = '\0'; break; // Convert bare quote to nul
- }
- if (!(*dst++ = c)) break; // Copy and break on nul
- }
- return out;
- }
-
- #endif
-
- // Populate all fields by parsing a single line of GCode
- // 58 bytes of SRAM are used to speed up seen/value
- void GCodeParser::parse(char *p) {
-
- reset(); // No codes to report
-
- auto uppercase = [](char c) {
- if (TERN0(GCODE_CASE_INSENSITIVE, WITHIN(c, 'a', 'z')))
- c += 'A' - 'a';
- return c;
- };
-
- // Skip spaces
- while (*p == ' ') ++p;
-
- // Skip N[-0-9] if included in the command line
- if (uppercase(*p) == 'N' && NUMERIC_SIGNED(p[1])) {
- //TERN_(FASTER_GCODE_PARSER, set('N', p + 1)); // (optional) Set the 'N' parameter value
- p += 2; // skip N[-0-9]
- while (NUMERIC(*p)) ++p; // skip [0-9]*
- while (*p == ' ') ++p; // skip [ ]*
- }
-
- // *p now points to the current command, which should be G, M, or T
- command_ptr = p;
-
- // Get the command letter, which must be G, M, or T
- const char letter = uppercase(*p++);
-
- // Nullify asterisk and trailing whitespace
- char *starpos = strchr(p, '*');
- if (starpos) {
- --starpos; // *
- while (*starpos == ' ') --starpos; // spaces...
- starpos[1] = '\0';
- }
-
- #if ANY(MARLIN_DEV_MODE, SWITCHING_TOOLHEAD, MAGNETIC_SWITCHING_TOOLHEAD, ELECTROMAGNETIC_SWITCHING_TOOLHEAD)
- #define SIGNED_CODENUM 1
- #endif
-
- // Bail if the letter is not G, M, or T
- // (or a valid parameter for the current motion mode)
- switch (letter) {
-
- case 'G': case 'M': case 'T': TERN_(MARLIN_DEV_MODE, case 'D':)
- // Skip spaces to get the numeric part
- while (*p == ' ') p++;
-
- #if ENABLED(PRUSA_MMU2)
- if (letter == 'T') {
- // check for special MMU2 T?/Tx/Tc commands
- if (*p == '?' || *p == 'x' || *p == 'c') {
- command_letter = letter;
- string_arg = p;
- return;
- }
- }
- #endif
-
- // Bail if there's no command code number
- if (!TERN(SIGNED_CODENUM, NUMERIC_SIGNED(*p), NUMERIC(*p))) return;
-
- // Save the command letter at this point
- // A '?' signifies an unknown command
- command_letter = letter;
-
- {
- #if ENABLED(SIGNED_CODENUM)
- int sign = 1; // Allow for a negative code like D-1 or T-1
- if (*p == '-') { sign = -1; ++p; }
- #endif
-
- // Get the code number - integer digits only
- codenum = 0;
-
- do { codenum = codenum * 10 + *p++ - '0'; } while (NUMERIC(*p));
-
- // Apply the sign, if any
- TERN_(SIGNED_CODENUM, codenum *= sign);
- }
-
- // Allow for decimal point in command
- #if ENABLED(USE_GCODE_SUBCODES)
- if (*p == '.') {
- p++;
- while (NUMERIC(*p))
- subcode = subcode * 10 + *p++ - '0';
- }
- #endif
-
- // Skip all spaces to get to the first argument, or nul
- while (*p == ' ') p++;
-
- #if ENABLED(GCODE_MOTION_MODES)
- if (letter == 'G'
- && (codenum <= TERN(ARC_SUPPORT, 3, 1) || codenum == 5 || TERN0(G38_PROBE_TARGET, codenum == 38))
- ) {
- motion_mode_codenum = codenum;
- TERN_(USE_GCODE_SUBCODES, motion_mode_subcode = subcode);
- }
- #endif
-
- break;
-
- #if ENABLED(GCODE_MOTION_MODES)
- #if ENABLED(ARC_SUPPORT)
- case 'I' ... 'J': case 'R':
- if (motion_mode_codenum != 2 && motion_mode_codenum != 3) return;
- #endif
- case 'P' ... 'Q':
- if (motion_mode_codenum != 5) return;
- case 'X' ... 'Z': case 'E' ... 'F':
- if (motion_mode_codenum < 0) return;
- command_letter = 'G';
- codenum = motion_mode_codenum;
- TERN_(USE_GCODE_SUBCODES, subcode = motion_mode_subcode);
- p--; // Back up one character to use the current parameter
- break;
- #endif // GCODE_MOTION_MODES
-
- default: return;
- }
-
- // The command parameters (if any) start here, for sure!
-
- #if DISABLED(FASTER_GCODE_PARSER)
- command_args = p; // Scan for parameters in seen()
- #endif
-
- // Only use string_arg for these M codes
- if (letter == 'M') switch (codenum) {
- #if ENABLED(GCODE_MACROS)
- case 810 ... 819:
- #endif
- #if ENABLED(EXPECTED_PRINTER_CHECK)
- case 16:
- #endif
- case 23: case 28: case 30: case 117 ... 118: case 928:
- string_arg = unescape_string(p);
- return;
- default: break;
- }
-
- #if ENABLED(DEBUG_GCODE_PARSER)
- const bool debug = codenum == 800;
- #endif
-
- /**
- * Find all parameters, set flags and pointers for fast parsing
- *
- * Most codes ignore 'string_arg', but those that want a string will get the right pointer.
- * The following loop assigns the first "parameter" having no numeric value to 'string_arg'.
- * This allows M0/M1 with expire time to work: "M0 S5 You Win!"
- * For 'M118' you must use 'E1' and 'A1' rather than just 'E' or 'A'
- */
- #if ENABLED(GCODE_QUOTED_STRINGS)
- bool quoted_string_arg = false;
- #endif
- string_arg = nullptr;
- while (const char param = uppercase(*p++)) { // Get the next parameter. A NUL ends the loop
-
- // Special handling for M32 [P] !/path/to/file.g#
- // The path must be the last parameter
- if (param == '!' && letter == 'M' && codenum == 32) {
- string_arg = p; // Name starts after '!'
- char * const lb = strchr(p, '#'); // Already seen '#' as SD char (to pause buffering)
- if (lb) *lb = '\0'; // Safe to mark the end of the filename
- return;
- }
-
- #if ENABLED(GCODE_QUOTED_STRINGS)
- if (!quoted_string_arg && param == '"') {
- quoted_string_arg = true;
- string_arg = unescape_string(p);
- }
- #endif
-
- #if ENABLED(FASTER_GCODE_PARSER)
- // Arguments MUST be uppercase for fast GCode parsing
- #define PARAM_OK(P) WITHIN((P), 'A', 'Z')
- #else
- #define PARAM_OK(P) true
- #endif
-
- if (PARAM_OK(param)) {
-
- while (*p == ' ') p++; // Skip spaces between parameters & values
-
- #if ENABLED(GCODE_QUOTED_STRINGS)
- const bool is_str = (*p == '"'), has_val = is_str || valid_float(p);
- char * const valptr = has_val ? is_str ? unescape_string(p) : p : nullptr;
- #else
- const bool has_val = valid_float(p);
- #if ENABLED(FASTER_GCODE_PARSER)
- char * const valptr = has_val ? p : nullptr;
- #endif
- #endif
-
- #if ENABLED(DEBUG_GCODE_PARSER)
- if (debug) {
- SERIAL_ECHOPAIR("Got param ", param, " at index ", (int)(p - command_ptr - 1));
- if (has_val) SERIAL_ECHOPGM(" (has_val)");
- }
- #endif
-
- if (!has_val && !string_arg) { // No value? First time, keep as string_arg
- string_arg = p - 1;
- #if ENABLED(DEBUG_GCODE_PARSER)
- if (debug) SERIAL_ECHOPAIR(" string_arg: ", hex_address((void*)string_arg)); // DEBUG
- #endif
- }
-
- if (TERN0(DEBUG_GCODE_PARSER, debug)) SERIAL_EOL();
-
- TERN_(FASTER_GCODE_PARSER, set(param, valptr)); // Set parameter exists and pointer (nullptr for no value)
- }
- else if (!string_arg) { // Not A-Z? First time, keep as the string_arg
- string_arg = p - 1;
- #if ENABLED(DEBUG_GCODE_PARSER)
- if (debug) SERIAL_ECHOPAIR(" string_arg: ", hex_address((void*)string_arg)); // DEBUG
- #endif
- }
-
- if (!WITHIN(*p, 'A', 'Z')) { // Another parameter right away?
- while (*p && DECIMAL_SIGNED(*p)) p++; // Skip over the value section of a parameter
- while (*p == ' ') p++; // Skip over all spaces
- }
- }
- }
-
- #if ENABLED(CNC_COORDINATE_SYSTEMS)
-
- // Parse the next parameter as a new command
- bool GCodeParser::chain() {
- #if ENABLED(FASTER_GCODE_PARSER)
- char *next_command = command_ptr;
- if (next_command) {
- while (*next_command && *next_command != ' ') ++next_command;
- while (*next_command == ' ') ++next_command;
- if (!*next_command) next_command = nullptr;
- }
- #else
- const char *next_command = command_args;
- #endif
- if (next_command) parse(next_command);
- return !!next_command;
- }
-
- #endif // CNC_COORDINATE_SYSTEMS
-
- void GCodeParser::unknown_command_warning() {
- SERIAL_ECHO_MSG(STR_UNKNOWN_COMMAND, command_ptr, "\"");
- }
-
- #if ENABLED(DEBUG_GCODE_PARSER)
-
- void GCodeParser::debug() {
- SERIAL_ECHOPAIR("Command: ", command_ptr, " (", command_letter);
- SERIAL_ECHO(codenum);
- SERIAL_ECHOLNPGM(")");
- #if ENABLED(FASTER_GCODE_PARSER)
- SERIAL_ECHOPGM(" args: { ");
- for (char c = 'A'; c <= 'Z'; ++c) if (seen(c)) SERIAL_CHAR(c, ' ');
- SERIAL_CHAR('}');
- #else
- SERIAL_ECHOPAIR(" args: { ", command_args, " }");
- #endif
- if (string_arg) {
- SERIAL_ECHOPAIR(" string: \"", string_arg);
- SERIAL_CHAR('"');
- }
- SERIAL_ECHOLNPGM("\n");
- for (char c = 'A'; c <= 'Z'; ++c) {
- if (seen(c)) {
- SERIAL_ECHOPAIR("Code '", c); SERIAL_ECHOPGM("':");
- if (has_value()) {
- SERIAL_ECHOLNPAIR(
- "\n float: ", value_float(),
- "\n long: ", value_long(),
- "\n ulong: ", value_ulong(),
- "\n millis: ", value_millis(),
- "\n sec-ms: ", value_millis_from_seconds(),
- "\n int: ", value_int(),
- "\n ushort: ", value_ushort(),
- "\n byte: ", (int)value_byte(),
- "\n bool: ", (int)value_bool(),
- "\n linear: ", value_linear_units(),
- "\n celsius: ", value_celsius()
- );
- }
- else
- SERIAL_ECHOLNPGM(" (no value)");
- }
- }
- }
-
- #endif // DEBUG_GCODE_PARSER
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