X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/46b0747592074017ff0ea4b33d4a7194235886e5..b2b89723a2427bba8290bd6967a1ab39cbb630be:/libs/smux/include/stg/xer_decoder.h

diff --git a/libs/smux/include/stg/xer_decoder.h b/libs/smux/include/stg/xer_decoder.h
index cf0d846f..b951c41d 100644
--- a/libs/smux/include/stg/xer_decoder.h
+++ b/libs/smux/include/stg/xer_decoder.h
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Copyright (c) 2004-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
  * Redistribution and modifications are permitted subject to BSD license.
  */
 #ifndef	_XER_DECODER_H_
@@ -15,23 +15,24 @@ struct asn_TYPE_descriptor_s;	/* Forward declaration */
 
 /*
  * The XER decoder of any ASN.1 type. May be invoked by the application.
+ * Decodes CANONICAL-XER and BASIC-XER.
  */
-asn_dec_rval_t xer_decode(struct asn_codec_ctx_s *opt_codec_ctx,
-	struct asn_TYPE_descriptor_s *type_descriptor,
-	void **struct_ptr,	/* Pointer to a target structure's pointer */
-	const void *buffer,	/* Data to be decoded */
-	size_t size		/* Size of data buffer */
-	);
+asn_dec_rval_t xer_decode(
+    const struct asn_codec_ctx_s *opt_codec_ctx,
+    const struct asn_TYPE_descriptor_s *type_descriptor,
+    void **struct_ptr,  /* Pointer to a target structure's pointer */
+    const void *buffer, /* Data to be decoded */
+    size_t size         /* Size of data buffer */
+);
 
 /*
  * Type of the type-specific XER decoder function.
  */
-typedef asn_dec_rval_t (xer_type_decoder_f)(asn_codec_ctx_t *opt_codec_ctx,
-		struct asn_TYPE_descriptor_s *type_descriptor,
-		void **struct_ptr,
-		const char *opt_mname,	/* Member name */
-		const void *buf_ptr, size_t size
-	);
+typedef asn_dec_rval_t(xer_type_decoder_f)(
+    const asn_codec_ctx_t *opt_codec_ctx,
+    const struct asn_TYPE_descriptor_s *type_descriptor, void **struct_ptr,
+    const char *opt_mname, /* Member name */
+    const void *buf_ptr, size_t size);
 
 /*******************************
  * INTERNALLY USEFUL FUNCTIONS *
@@ -43,28 +44,28 @@ typedef asn_dec_rval_t (xer_type_decoder_f)(asn_codec_ctx_t *opt_codec_ctx,
  * and others. This function should not be used by applications, as its API
  * is subject to changes.
  */
-asn_dec_rval_t xer_decode_general(asn_codec_ctx_t *opt_codec_ctx,
-	asn_struct_ctx_t *ctx,	/* Type decoder context */
-	void *struct_key,	/* Treated as opaque pointer */
-	const char *xml_tag,	/* Expected XML tag name */
-	const void *buf_ptr, size_t size,
-	int (*opt_unexpected_tag_decoder)
-		(void *struct_key, const void *chunk_buf, size_t chunk_size),
-	ssize_t (*body_receiver)
-		(void *struct_key, const void *chunk_buf, size_t chunk_size,
-			int have_more)
-	);
+asn_dec_rval_t xer_decode_general(
+    const asn_codec_ctx_t *opt_codec_ctx,
+    asn_struct_ctx_t *ctx, /* Type decoder context */
+    void *struct_key,      /* Treated as opaque pointer */
+    const char *xml_tag,   /* Expected XML tag name */
+    const void *buf_ptr, size_t size,
+    int (*opt_unexpected_tag_decoder)(void *struct_key, const void *chunk_buf,
+                                      size_t chunk_size),
+    ssize_t (*body_receiver)(void *struct_key, const void *chunk_buf,
+                             size_t chunk_size, int have_more));
 
 
 /*
  * Fetch the next XER (XML) token from the stream.
  * The function returns the number of bytes occupied by the chunk type,
  * returned in the _ch_type. The _ch_type is only set (and valid) when
- * the return value is greater than 0.
+ * the return value is >= 0.
  */
   typedef enum pxer_chunk_type {
-	PXER_TAG,	/* Complete XER tag */
-	PXER_TEXT,	/* Plain text between XER tags */
+	PXER_WMORE,     /* Chunk type is not clear, more data expected. */
+	PXER_TAG,	    /* Complete XER tag */
+	PXER_TEXT,	    /* Plain text between XER tags */
 	PXER_COMMENT	/* A comment, may be part of */
   } pxer_chunk_type_e;
 ssize_t xer_next_token(int *stateContext,
@@ -87,12 +88,11 @@ xer_check_tag_e xer_check_tag(const void *buf_ptr, int size,
 		const char *need_tag);
 
 /*
- * Check whether this buffer consists of entirely XER whitespace characters.
+ * Get the number of bytes consisting entirely of XER whitespace characters.
  * RETURN VALUES:
- * 1:	Whitespace or empty string
- * 0:	Non-whitespace
+ * >=0:	Number of whitespace characters in the string.
  */
-int xer_is_whitespace(const void *chunk_buf, size_t chunk_size);
+size_t xer_whitespace_span(const void *chunk_buf, size_t chunk_size);
 
 /*
  * Skip the series of anticipated extensions.