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/* $id$
$Locker: $ $Name: $ $State: Exp $
* removeQuotes - generates a new dynamically allocated string that
* contains no quotes (outer most quotes).
* The passed in string is preserved.
* Return: NULL on memory allocation problems
This file bases on CMDLINE.C of FreeCOM v0.81 beta 1.
$Log: unquote.c,v $
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 <string.h>
#include "../include/cmdline.h"
char *unquote(const char *str, const char * const end)
{ char *h, *newStr;
const char *q;
size_t len;
assert(str);
assert(end);
assert(end >= str);
if((h = newStr = malloc(end - str + 1)) == 0)
return 0;
while((q = strpbrk(str, QUOTE_STR)) != 0 && q < end) {
/* there is a quote at *q */
/* copy the portion before q */
memcpy(h, str, len = q++ - str);
h += len;
if((str = strchr(q, q[-1])) == 0 || str >= end) {
/* no right quote */
str = q;
break;
}
/* copy the quoted portion */
memcpy(h, q, len = str++ - q);
h += len;
}
/* copy the remaining unquoted portion */
memcpy(h, str, len = end - str);
h[len] = '\0';
/* to not waste one byte per deleted quote use this:
h = realloc(newStr, strlen(newStr) + 1);
assert(h);
return h;
-or- if you assume that to shrink can fail
return (h = realloc(newStr, strlen(newStr) + 1)) != 0
? h: newStr;
*/
return newStr;
}
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