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#if !defined(lint) && !defined(DOS)
static char rcsid[] = "$Id: list.c 769 2007-10-24 00:15:40Z hubert@u.washington.edu $";
#endif
/*
* ========================================================================
* Copyright 2006-2007 University of Washington
* Copyright 2013-2017 Eduardo Chappa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
/*======================================================================
list.c
====*/
#include "../pith/headers.h"
#include "../pith/list.h"
#include "../pith/string.h"
/*
* Internal prototypes
*/
/*
* parse_list - takes a comma delimited list of "count" elements and
* returns an array of pointers to each element neatly
* malloc'd in its own array. Any errors are returned
* in the string pointed to by "error"
*
* If remove_surrounding_double_quotes is set, then double quotes around
* each element of the list are removed. We can't do this for all list
* variables. For example, incoming folders look like
* nickname foldername
* in the config file. Each of those may be quoted separately.
*
* NOTE: only recognizes escaped quotes
*/
char **
parse_list(char *list, int count, int flags, char **error)
{
char **lvalue, *p2, *p3, *p4;
int was_quoted = 0;
int remove_surrounding_double_quotes;
int commas_may_be_escaped;
remove_surrounding_double_quotes = (flags & PL_REMSURRQUOT);
commas_may_be_escaped = (flags & PL_COMMAQUOTE);
lvalue = (char **) fs_get((count+1) * sizeof(char *));
count = 0;
while(*list){ /* pick elements from list */
p2 = list; /* find end of element */
while(1){
if(*p2 == '"') /* ignore ',' if quoted */
was_quoted = (was_quoted) ? 0 : 1 ;
if(*p2 == '\\' && *(p2+1) == '"')
p2++; /* preserve escaped quotes, too */
if((*p2 == ',' && !was_quoted) || *p2 == '\0')
break;
if(commas_may_be_escaped && *p2 == '\\' && *(p2+1) == ',')
p2++;
p2++;
}
if(was_quoted){ /* unbalanced quotes! */
if(error)
*error = "Unbalanced quotes";
break;
}
/*
* if element found, eliminate trailing
* white space and tie into variable list
*/
if(p2 != list){
for(p3 = p2 - 1; isspace((unsigned char) *p3) && list < p3; p3--)
;
p4 = fs_get(((p3 - list) + 2) * sizeof(char));
lvalue[count] = p4;
while(list <= p3)
*p4++ = *list++;
*p4 = '\0';
if(remove_surrounding_double_quotes)
removing_double_quotes(lvalue[count]);
count++;
}
if(*(list = p2) != '\0'){ /* move to beginning of next val */
while(*list == ',' || isspace((unsigned char)*list))
list++;
}
}
lvalue[count] = NULL; /* tie off pointer list */
return(lvalue);
}
/*
* Free array of string pointers and associated strings
*
* Args: list -- array of char *'s
*/
void
free_list_array(char ***list)
{
char **p;
if(list && *list){
for(p = *list; *p; p++)
fs_give((void **) p);
fs_give((void **) list);
}
}
/*
* Copy array of string pointers and associated strings
*
* Args: list -- array of char *'s
*
* Returns: Allocated array of string pointers and allocated copies of strings.
* Caller should free the list array when done.
*/
char **
copy_list_array(char **list)
{
int i, cnt = 0;
char **p, **ret_list = NULL;
if(list){
while(list[cnt++])
;
p = ret_list = (char **)fs_get((cnt+1) * sizeof(char *));
memset((void *) ret_list, 0, (cnt+1) * sizeof(char *));
for(i=0; list[i]; i++, p++)
*p = cpystr(list[i]);
*p = NULL;
}
return(ret_list);
}
int
equal_list_arrays(char **list1, char **list2)
{
int ret = 0;
if(list1 && list2){
while(*list1){
if(!*list2 || strcmp(*list1, *list2) != 0)
break;
list1++;
list2++;
}
if(*list1 == NULL && *list2 == NULL)
ret++;
}
return(ret);
}
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