Stupid "copy" bstr_create_from_cfgstr

FossilOrigin-Name: 37e640922757dc1ada24bd949cf8117c45b22123f2a3cc76dea08a4744ad72f6

src/cw/bstr16_create_from_cfgstr.c

@@ -0,0 +1,89 @@
+/*
+    This file is part of libcapwap.
+
+    libcapwap is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libcapwap is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+/**
+ * @file
+ * @brief bstr_create_from_cfgstr function
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "bstr.h"
+
+
+/**
+ * Create a bstr16_t string from a string read from config file.
+ * 
+ * @param s String from config file.
+ * @return The create bstr_t string.
+ *
+ * The string from config file is an ASCII-text which is interpreted
+ * as hexadecimal string if it starts with ".x"
+ *
+ * @see bstr16_t
+ */
+uint8_t * bstr16_create_from_cfgstr(const char * s)
+{
+	int l = strlen(s);
+
+	
+	if (s[0]!='.')
+		return bstr16_create((uint8_t*)s,l);
+
+	if (l<=2)
+		return bstr16_create((uint8_t*)s,l);
+
+	if (s[1]=='.')
+		return bstr16_create((uint8_t*)s+1,l-1);
+
+	if (s[1]=='x'){
+		uint8_t * ns=0;
+		int len=0;
+
+		int ch,cl;
+		const char *ss = s+2;
+		int rc ;
+		do {
+			rc = sscanf(ss,"%01X",&ch);
+			if (rc!=1)
+				break;
+			ss++;
+			rc = sscanf(ss,"%01X",&cl);
+			if (rc!=1)
+				cl=0;
+			ss++;
+			int c=(ch<<4) | cl;
+			
+			len++;
+			ns = realloc(ns,len);
+			ns[len-1]=c;
+
+
+		}while (rc==1);
+
+
+		return bstr16_create(ns,len);
+
+	}
+
+	return NULL;
+}
+
+