1 files changed, 278 insertions, 0 deletions
diff --git a/lib/util/util.c b/lib/util/util.c
index fc55629c4c..1e7991dbf1 100644
--- a/lib/util/util.c
+++ b/lib/util/util.c
@@ -27,6 +27,7 @@
 #include "system/locale.h"
 #undef malloc
 #undef strcasecmp
+#undef strncasecmp
 #undef strdup
 #undef realloc
 
@@ -559,3 +560,280 @@ _PUBLIC_ void *talloc_check_name_abort(const void *ptr, const char *name)
         return NULL;
 }
 
+/**
+ Trim the specified elements off the front and back of a string.
+**/
+_PUBLIC_ bool trim_string(char *s, const char *front, const char *back)
+{
+	bool ret = false;
+	size_t front_len;
+	size_t back_len;
+	size_t len;
+
+	/* Ignore null or empty strings. */
+	if (!s || (s[0] == '\0'))
+		return false;
+
+	front_len	= front? strlen(front) : 0;
+	back_len	= back? strlen(back) : 0;
+
+	len = strlen(s);
+
+	if (front_len) {
+		while (len && strncmp(s, front, front_len)==0) {
+			/* Must use memmove here as src & dest can
+			 * easily overlap. Found by valgrind. JRA. */
+			memmove(s, s+front_len, (len-front_len)+1);
+			len -= front_len;
+			ret=true;
+		}
+	}
+	
+	if (back_len) {
+		while ((len >= back_len) && strncmp(s+len-back_len,back,back_len)==0) {
+			s[len-back_len]='\0';
+			len -= back_len;
+			ret=true;
+		}
+	}
+	return ret;
+}
+
+/**
+ Find the number of 'c' chars in a string
+**/
+_PUBLIC_ _PURE_ size_t count_chars(const char *s, char c)
+{
+	size_t count = 0;
+
+	while (*s) {
+		if (*s == c) count++;
+		s ++;
+	}
+
+	return count;
+}
+
+/**
+ Routine to get hex characters and turn them into a 16 byte array.
+ the array can be variable length, and any non-hex-numeric
+ characters are skipped.  "0xnn" or "0Xnn" is specially catered
+ for.
+
+ valid examples: "0A5D15"; "0x15, 0x49, 0xa2"; "59\ta9\te3\n"
+
+
+**/
+_PUBLIC_ size_t strhex_to_str(char *p, size_t p_len, const char *strhex, size_t strhex_len)
+{
+	size_t i;
+	size_t num_chars = 0;
+	uint8_t   lonybble, hinybble;
+	const char     *hexchars = "0123456789ABCDEF";
+	char           *p1 = NULL, *p2 = NULL;
+
+	for (i = 0; i < strhex_len && strhex[i] != 0; i++) {
+		if (strncasecmp(hexchars, "0x", 2) == 0) {
+			i++; /* skip two chars */
+			continue;
+		}
+
+		if (!(p1 = strchr(hexchars, toupper((unsigned char)strhex[i]))))
+			break;
+
+		i++; /* next hex digit */
+
+		if (!(p2 = strchr(hexchars, toupper((unsigned char)strhex[i]))))
+			break;
+
+		/* get the two nybbles */
+		hinybble = PTR_DIFF(p1, hexchars);
+		lonybble = PTR_DIFF(p2, hexchars);
+
+		if (num_chars >= p_len) {
+			break;
+		}
+
+		p[num_chars] = (hinybble << 4) | lonybble;
+		num_chars++;
+
+		p1 = NULL;
+		p2 = NULL;
+	}
+	return num_chars;
+}
+
+/** 
+ * Parse a hex string and return a data blob. 
+ */
+_PUBLIC_ _PURE_ DATA_BLOB strhex_to_data_blob(TALLOC_CTX *mem_ctx, const char *strhex) 
+{
+	DATA_BLOB ret_blob = data_blob_talloc(mem_ctx, NULL, strlen(strhex)/2+1);
+
+	ret_blob.length = strhex_to_str((char *)ret_blob.data, ret_blob.length,
+					strhex,
+					strlen(strhex));
+
+	return ret_blob;
+}
+
+
+/**
+ * Routine to print a buffer as HEX digits, into an allocated string.
+ */
+_PUBLIC_ void hex_encode(const unsigned char *buff_in, size_t len, char **out_hex_buffer)
+{
+	int i;
+	char *hex_buffer;
+
+	*out_hex_buffer = malloc_array_p(char, (len*2)+1);
+	hex_buffer = *out_hex_buffer;
+
+	for (i = 0; i < len; i++)
+		slprintf(&hex_buffer[i*2], 3, "%02X", buff_in[i]);
+}
+
+/**
+ * talloc version of hex_encode()
+ */
+_PUBLIC_ char *hex_encode_talloc(TALLOC_CTX *mem_ctx, const unsigned char *buff_in, size_t len)
+{
+	int i;
+	char *hex_buffer;
+
+	hex_buffer = talloc_array(mem_ctx, char, (len*2)+1);
+
+	for (i = 0; i < len; i++)
+		slprintf(&hex_buffer[i*2], 3, "%02X", buff_in[i]);
+
+	return hex_buffer;
+}
+
+/**
+ Unescape a URL encoded string, in place.
+**/
+
+_PUBLIC_ void rfc1738_unescape(char *buf)
+{
+	char *p=buf;
+
+	while ((p=strchr(p,'+')))
+		*p = ' ';
+
+	p = buf;
+
+	while (p && *p && (p=strchr(p,'%'))) {
+		int c1 = p[1];
+		int c2 = p[2];
+
+		if (c1 >= '0' && c1 <= '9')
+			c1 = c1 - '0';
+		else if (c1 >= 'A' && c1 <= 'F')
+			c1 = 10 + c1 - 'A';
+		else if (c1 >= 'a' && c1 <= 'f')
+			c1 = 10 + c1 - 'a';
+		else {p++; continue;}
+
+		if (c2 >= '0' && c2 <= '9')
+			c2 = c2 - '0';
+		else if (c2 >= 'A' && c2 <= 'F')
+			c2 = 10 + c2 - 'A';
+		else if (c2 >= 'a' && c2 <= 'f')
+			c2 = 10 + c2 - 'a';
+		else {p++; continue;}
+			
+		*p = (c1<<4) | c2;
+
+		memmove(p+1, p+3, strlen(p+3)+1);
+		p++;
+	}
+}
+
+/**
+  varient of strcmp() that handles NULL ptrs
+**/
+_PUBLIC_ int strcmp_safe(const char *s1, const char *s2)
+{
+	if (s1 == s2) {
+		return 0;
+	}
+	if (s1 == NULL || s2 == NULL) {
+		return s1?-1:1;
+	}
+	return strcmp(s1, s2);
+}
+
+
+/**
+return the number of bytes occupied by a buffer in ASCII format
+the result includes the null termination
+limited by 'n' bytes
+**/
+_PUBLIC_ size_t ascii_len_n(const char *src, size_t n)
+{
+	size_t len;
+
+	len = strnlen(src, n);
+	if (len+1 <= n) {
+		len += 1;
+	}
+
+	return len;
+}
+
+/**
+ Set a boolean variable from the text value stored in the passed string.
+ Returns true in success, false if the passed string does not correctly 
+ represent a boolean.
+**/
+
+_PUBLIC_ bool set_boolean(const char *boolean_string, bool *boolean)
+{
+	if (strwicmp(boolean_string, "yes") == 0 ||
+	    strwicmp(boolean_string, "true") == 0 ||
+	    strwicmp(boolean_string, "on") == 0 ||
+	    strwicmp(boolean_string, "1") == 0) {
+		*boolean = true;
+		return true;
+	} else if (strwicmp(boolean_string, "no") == 0 ||
+		   strwicmp(boolean_string, "false") == 0 ||
+		   strwicmp(boolean_string, "off") == 0 ||
+		   strwicmp(boolean_string, "0") == 0) {
+		*boolean = false;
+		return true;
+	}
+	return false;
+}
+
+/**
+return the number of bytes occupied by a buffer in CH_UTF16 format
+the result includes the null termination
+**/
+_PUBLIC_ size_t utf16_len(const void *buf)
+{
+	size_t len;
+
+	for (len = 0; SVAL(buf,len); len += 2) ;
+
+	return len + 2;
+}
+
+/**
+return the number of bytes occupied by a buffer in CH_UTF16 format
+the result includes the null termination
+limited by 'n' bytes
+**/
+_PUBLIC_ size_t utf16_len_n(const void *src, size_t n)
+{
+	size_t len;
+
+	for (len = 0; (len+2 < n) && SVAL(src, len); len += 2) ;
+
+	if (len+2 <= n) {
+		len += 2;
+	}
+
+	return len;
+}
+
+