Created iniGet/ReadExistingString(), which do nothing (just return NULL) if

the key doesn't exist.

src/xpdev/ini_file.c

@@ -298,9 +298,12 @@ BOOL iniKeyExists(str_list_t list, const char* section, const char* key)
 	char	val[INI_MAX_VALUE_LEN];
 	size_t	i;
 
+	if(list==NULL)
+		return(FALSE);
+
 	i=get_value(list, section, key, val);
 
-	if(list==NULL || list[i]==NULL || *(list[i])==INI_OPEN_SECTION_CHAR)
+	if(list[i]==NULL || *(list[i])==INI_OPEN_SECTION_CHAR)
 		return(FALSE);
 
 	return(TRUE);
@@ -647,13 +650,18 @@ char* iniSetStringList(str_list_t* list, const char* section, const char* key
 	return iniSetString(list, section, key, value, style);
 }
 
+static char* default_value(const char* deflt, char* value)
+{
+	if(deflt!=NULL && deflt!=value)
+		sprintf(value,"%.*s",INI_MAX_VALUE_LEN-1,deflt);
+
+	return(deflt);
+}
+
 char* iniReadString(FILE* fp, const char* section, const char* key, const char* deflt, char* value)
 {
-	if(read_value(fp,section,key,value)==NULL || *value==0 /* blank */) {
-		if(deflt!=NULL && deflt!=value)
-			sprintf(value,"%.*s",INI_MAX_VALUE_LEN-1,deflt);
-		return((char*)deflt);
-	}
+	if(read_value(fp,section,key,value)==NULL || *value==0 /* blank */)
+		return default_value(deflt,value);
 
 	return(value);
 }
@@ -662,11 +670,37 @@ char* iniGetString(str_list_t list, const char* section, const char* key, const
 {
 	get_value(list, section, key, value);
 
-	if(*value==0 /* blank value or missing key */) {
-		if(deflt!=NULL && deflt!=value)
-			sprintf(value,"%.*s",INI_MAX_VALUE_LEN-1,deflt);
-		return((char*)deflt);
-	}
+	if(*value==0 /* blank value or missing key */)
+		return default_value(deflt,value);
+
+	return(value);
+}
+
+char* iniReadExistingString(FILE* fp, const char* section, const char* key, const char* deflt, char* value)
+{
+	if(read_value(fp,section,key,value)==NULL)
+		return(NULL);
+
+	if(*value==0 /* blank */)
+		return default_value(deflt,value);
+
+	return(value);
+}
+
+char* iniGetExistingString(str_list_t list, const char* section, const char* key, const char* deflt, char* value)
+{
+	size_t	i;
+
+	if(list==NULL)
+		return(NULL);
+
+	i=get_value(list, section, key, value);
+
+	if(list[i]==NULL || *(list[i])==INI_OPEN_SECTION_CHAR)	/* missing key */
+		return(NULL);
+
+	if(*value==0 /* blank value  */)
+		return default_value(deflt,value);
 
 	return(value);
 }

src/xpdev/ini_file.h

 /* ini_file.h */
 
-/* Functions to parse ini files */
+/* Functions to parse ini (initialization / configuration) files */
 
 /* $Id$ */
 
@@ -8,7 +8,7 @@
  * @format.tab-size 4		(Plain Text/Source Code File Header)			*
  * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
  *																			*
- * Copyright 2005 Rob Swindell - http://www.synchro.net/copyright.html		*
+ * Copyright 2007 Rob Swindell - http://www.synchro.net/copyright.html		*
  *																			*
  * This library is free software; you can redistribute it and/or			*
  * modify it under the terms of the GNU Lesser General Public License		*
@@ -79,6 +79,9 @@ str_list_t	iniLogLevelStringList(void);
 /* These functions read a single key of the specified type */
 char*		iniReadString(FILE*, const char* section, const char* key
 					,const char* deflt, char* value);
+/* If the key doesn't exist, iniReadExistingString just returns NULL */
+char*		iniReadExistingString(FILE*, const char* section, const char* key
+					,const char* deflt, char* value);
 str_list_t	iniReadStringList(FILE*, const char* section, const char* key
 					,const char* sep, const char* deflt);
 long		iniReadInteger(FILE*, const char* section, const char* key
@@ -128,6 +131,9 @@ named_string_t**
 
 char*		iniGetString(str_list_t, const char* section, const char* key
 					,const char* deflt, char* value);
+/* If the key doesn't exist, iniGetExistingString just returns NULL */
+char*		iniGetExistingString(str_list_t, const char* section, const char* key
+					,const char* deflt, char* value);
 str_list_t	iniGetStringList(str_list_t, const char* section, const char* key
 					,const char* sep, const char* deflt);
 long		iniGetInteger(str_list_t, const char* section, const char* key