[settings] Remove "uristring" setting type

Commit b5f5f73 ("[cmdline] Expand settings within each command-line
token individually") effectively rendered the "uristring" setting type
obsolete, since strings containing whitespace no longer break the
command line parser.  The concept of the "uristring" type is not well
defined, since URI escaping rules depend on which portion of a URI is
being escaped.

Remove the "uristring" type, converting it into an alias for the
"string" setting type so as to avoid breaking existing scripts.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/core/settings.c

 	.format = format_string_setting,
 };
 
-/**
- * Parse URI-encoded string setting value
+/** A URI-encoded string setting type
  *
- * @v type		Setting type
- * @v value		Formatted setting value
- * @v buf		Buffer to contain raw value
- * @v len		Length of buffer
- * @ret len		Length of raw value, or negative error
+ * This setting type is obsolete; the name ":uristring" is retained to
+ * avoid breaking existing scripts.
  */
-static int parse_uristring_setting ( const struct setting_type *type __unused,
-				     const char *value, void *buf, size_t len ){
-	char tmp[ len + 1 /* NUL */ ];
-	size_t raw_len;
-
-	/* Decode to temporary buffer (including NUL) */
-	raw_len = uri_decode ( value, tmp, sizeof ( tmp ) );
-
-	/* Copy to output buffer (excluding NUL) */
-	if ( len > raw_len )
-		len = raw_len;
-	memcpy ( buf, tmp, len );
-
-	return raw_len;
-}
-
-/**
- * Format URI-encoded string setting value
- *
- * @v type		Setting type
- * @v raw		Raw setting value
- * @v raw_len		Length of raw setting value
- * @v buf		Buffer to contain formatted value
- * @v len		Length of buffer
- * @ret len		Length of formatted value, or negative error
- */
-static int format_uristring_setting ( const struct setting_type *type __unused,
-				      const void *raw, size_t raw_len,
-				      char *buf, size_t len ) {
-	char tmp[ raw_len + 1 /* NUL */ ];
-
-	/* Copy to temporary buffer and terminate */
-	memcpy ( tmp, raw, raw_len );
-	tmp[raw_len] = '\0';
-
-	/* Encode directly into output buffer */
-	return uri_encode ( tmp, buf, len, URI_FRAGMENT );
-}
-
-/** A URI-encoded string setting type */
 const struct setting_type setting_type_uristring __setting_type = {
 	.name = "uristring",
-	.parse = parse_uristring_setting,
-	.format = format_uristring_setting,
+	.parse = parse_string_setting,
+	.format = format_string_setting,
 };
 
 /**

src/tests/settings_test.c

 	.type = &setting_type_string,
 };
 
-/** Test URI-encoded string setting */
-static struct setting test_uristring_setting = {
-	.name = "test_uristring",
-	.type = &setting_type_uristring,
-};
-
 /** Test IPv4 address setting type */
 static struct setting test_ipv4_setting = {
 	.name = "test_ipv4",
 	fetchf_ok ( &test_settings, &test_string_setting,
 		    RAW ( 'w', 'o', 'r', 'l', 'd' ), "world" );
 
-	/* "uristring" setting type */
-	storef_ok ( &test_settings, &test_uristring_setting, "hello%20world",
-		    RAW ( 'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l',
-			  'd' ) );
-	fetchf_ok ( &test_settings, &test_uristring_setting,
-		    RAW ( 1, 2, 3, 4, 5 ), "%01%02%03%04%05" );
-
 	/* "ipv4" setting type */
 	storef_ok ( &test_settings, &test_ipv4_setting, "192.168.0.1",
 		    RAW ( 192, 168, 0, 1 ) );