renamed capwap directory to cw.

FossilOrigin-Name: 8a43dd9d05a4cb73210243ddd8df2a26f16c7ef2c4d4e36ab446de1f65d88223

src/cw/format.c

@@ -0,0 +1,113 @@
+/*
+    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 Implementation of various format functions.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+
+/**
+ * Format bytes as hex string.
+ * @param dst Destination buffer
+ * @param format Format to use, when writing a byte. Use the same format syntax as for printf,
+ * e.g. the string "%02X" would format a byte as upper case hexadeciaml string.
+ * @param delim Delimiter string. The given string is placed between bytes.
+ * @param src Bytes to format
+ * @param len Number of bytes to format
+ * @return the number of characters written to dst
+ *
+ * This function is used by macros like #cw_format_hexl, #cw_format_hex ... \n
+ * The size of the destination buffer must be at least x * len + strlen(delim) * (len-1) +1,
+ * where x is the number of characters. A formatted hex byte needs (typically 2).
+ *
+ */
+int cw_format_hex_bytes(char *dst, const char *format, const char *delim,
+			const uint8_t * src, int len)
+{
+	char *d = dst;
+	int i;
+	const char *cdelim = NULL;
+	for (i = 0; i < len; i++) {
+		if (cdelim)
+			d += sprintf(d, "%s", cdelim);
+		else
+			cdelim = delim;
+
+		d += sprintf(d, format, src[i]);
+
+	}
+	return d - dst;
+}
+
+
+
+/**
+ * Read hex bytes from a string to an uint8_t array
+ * @param dst destination array
+ * @param s string to read
+ * @param len length of string
+ * @return 0 if all was ok \n 1 if an error has occured.
+ */
+
+int cw_format_scan_hex_bytes(uint8_t *dst,const char *s, int len)
+{
+	int rc ;
+	int err=0;
+	int val;
+	int c;
+	int i;
+
+	if ( len & 1){
+		rc = sscanf(s,"%01X",&c);
+		if (rc!=1){
+			c=0;
+			err=1;
+		}
+		*dst++=c;
+		s++;
+		len--;
+	}
+
+
+	for (i=0; i<len; i++){
+		rc = sscanf(s+i,"%01X",&c);
+		if (rc!=1){
+			c=0;
+			err=1;
+		}
+
+
+		if (!(i&1)) {
+			val = c<<4;	
+
+		}
+		else{
+			val |= c;
+			*dst++=val;
+		}
+
+	}
+	
+	return err;
+}
+
+