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/* $id$
$Locker: $ $Name: $ $State: Exp $
* Scan command line and handle options
* line may be NULL and is treated as empty.
* opt may be NULL and is treated as "no valid option".
* This will print an error message, if an option is specified.
* Return:
* == NULL: error, message already on screen any argument possibly
* modified
* != NULL: argument buffer, must be freed with "freep()"
* + *argc := number of non-option arguments within array, &
* + *opts := number of parsed options.
* + array contains *argc entries now.
This file bases on CMDLINE.C of FreeCOM v0.81 beta 1.
$Log: scancmd.c,v $
Revision 1.2 2001/08/15 00:12:27 skaus
bugfix: scancmd.c: /B and /A let COPY fail (ec == E_Ignore) (bug 829)
upd: HTML docs
Revision 1.1 2001/04/12 00:33:53 skaus
chg: new structure
chg: If DEBUG enabled, no available commands are displayed on startup
fix: PTCHSIZE also patches min extra size to force to have this amount
of memory available on start
bugfix: CALL doesn't reset options
add: PTCHSIZE to patch heap size
add: VSPAWN, /SWAP switch, .SWP resource handling
bugfix: COMMAND.COM A:\
bugfix: CALL: if swapOnExec == ERROR, no change of swapOnExec allowed
add: command MEMORY
bugfix: runExtension(): destroys command[-2]
add: clean.bat
add: localized CRITER strings
chg: use LNG files for hard-coded strings (hangForEver(), init.c)
via STRINGS.LIB
add: DEL.C, COPY.C, CBREAK.C: STRINGS-based prompts
add: fixstrs.c: prompts & symbolic keys
add: fixstrs.c: backslash escape sequences
add: version IDs to DEFAULT.LNG and validation to FIXSTRS.C
chg: splitted code apart into LIB\*.c and CMD\*.c
bugfix: IF is now using error system & STRINGS to report errors
add: CALL: /N
*/
#include "../config.h"
#include <assert.h>
#include <stdlib.h>
#include "../include/command.h"
#include "../include/cmdline.h"
#include "../err_fcts.h"
/*
* Parse global options
*/
static int parseOptions(optScanner fct, void * const arg, char **argv, int *argc, int *optcnt)
{ int ec = E_None;
char **argp, *a;
assert(argv);
assert(argc);
assert(optcnt);
*optcnt = 0;
argp = argv;
while((*argp++ = a = *argv++) != 0)
if(isoption(a))
if((ec = scanOption(fct, arg, a)) == E_None) {
free(*--argp); /* ignore (overwrite) it */
++*optcnt;
} else if(ec != E_Ignore) { /* the entry caused an error */
/* Copy the remaining entries */
while((*argp++ = *argv++) != 0);
break;
}
*argc -= *optcnt;
return ec == E_Ignore? E_None: ec; /* everything done */
}
char **scanCmdline(char *line, optScanner fct, void * const arg
, int *argc, int *opts)
{ char **argv;
assert(argc);
assert(opts);
if((argv = split(line, argc)) == 0) {
error_out_of_memory();
return 0;
}
if(parseOptions(fct, arg, argv, argc, opts) != E_None) {
freep(argv);
return 0;
}
return argv;
}
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