| 0,0 → 1,37 |
|---|
| /* This file provides functions for parsing commands and their arguments |
| |
| Warning: parsecmd() will modify the cmdline string, so it won't be |
| readable anymore in any other way other than via ptrtable[]. |
| This function returns the number of arguments that have been parsed, |
| or -1 on parsing error. |
| |
| Copyright (C) 2012-2016 Mateusz Viste */ |
| |
| #include "version.h" |
| |
| int parsecmd(char *cmdline, char **ptrtable, int maxargs) { |
| int x = 0, argc = 0, state = 0; |
| for (;;) { |
| switch (cmdline[x]) { /* detect delimiter and non-delimiter chars */ |
| case 0x0: /* detect end of string */ |
| return(argc); /* return number of arguments */ |
| case ' ': /* space */ |
| case 0x9: /* tab */ |
| case 0xA: /* LF */ |
| case 0xD: /* CR */ |
| if (state != 0) { /* if awaiting for argument end */ |
| cmdline[x] = 0; /* terminate the substring */ |
| state = 0; /* switch to 'waiting for argument end' state */ |
| } |
| break; |
| default: /* anything that is not a delimiter */ |
| if (state == 0) { /* if awaiting for argument start */ |
| if (argc == maxargs) return(-1); /* look out for arg overflow */ |
| ptrtable[argc] = &cmdline[x]; /* save the address of the substring */ |
| argc += 1; /* increment the arguments count */ |
| state = 1; /* switch to 'waiting for argument' state */ |
| } |
| } |
| x += 1; /* move to the next character of cmdline */ |
| } |
| } |