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More parser comments, optimize code_seen, save with goto

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This commit is contained in:
Scott Lahteine 2015-05-17 05:42:04 -07:00
parent c6d8dd19d9
commit adc8fcb77f
1 changed files with 13 additions and 8 deletions
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21
Marlin/Marlin_main.cpp
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@ -938,7 +938,7 @@ long code_value_long() { return strtol(seen_pointer + 1, NULL, 10); }
int16_t code_value_short() { return (int16_t)strtol(seen_pointer + 1, NULL, 10); }
bool code_seen(char code) {
seen_pointer = strchr(current_command, code);
seen_pointer = strchr(current_command + 3, code); // +3 since "G0 " is the shortest prefix
return (seen_pointer != NULL); //Return True if a character was found
}
@ -5184,16 +5184,18 @@ void process_next_command() {
// Get the command code, which must be G, M, or T
char command_code = *current_command;
bool code_is_good = code_has_value();
// The code must have a numeric value
bool code_is_good = (current_command[1] >= '0' && current_command[1] <= '9');
if (!code_is_good) {
unknown_command_error();
ok_to_send();
return;
}
int codenum; // define ahead of goto
int codenum = code_value_short();
// Bail early if there's no code
if (!code_is_good) goto ExitUnknownCommand;
// Interpret the code int
codenum = code_value_short();
// Handle a known G, M, or T
switch(command_code) {
case 'G': switch (codenum) {
@ -5700,6 +5702,9 @@ void process_next_command() {
break;
}
ExitUnknownCommand:
// Still unknown command? Throw an error
if (!code_is_good) unknown_command_error();
ok_to_send();