Missed MANIFEST change and addition of ext/syck/emitter.c.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4067 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 318 insertions, 0 deletions

diff --git a/ext/syck/MANIFEST b/ext/syck/MANIFEST
index 0f500f2846..666e9c0465 100644
--- a/ext/syck/MANIFEST
+++ b/ext/syck/MANIFEST
@@ -9,3 +9,4 @@ rubyext.c
 syck.c
 syck.h
 token.c
+emitter.c
diff --git a/ext/syck/emitter.c b/ext/syck/emitter.c
new file mode 100644
index 0000000000..08c280feaf
--- /dev/null
+++ b/ext/syck/emitter.c
@@ -0,0 +1,317 @@
+/*
+ * emitter.c
+ *
+ * $Author$
+ * $Date$
+ *
+ * Copyright (C) 2003 why the lucky stiff
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "syck.h"
+
+#define DEFAULT_ANCHOR_FORMAT "id%03d"
+
+struct adjust_arg {
+    /* Position to start adjusting */
+    long startpos;
+    /* Adjusting by an offset */
+    int offset;
+};
+
+/*
+ * Allocate an emitter
+ */
+SyckEmitter *
+syck_new_emitter()
+{
+    SyckEmitter *e;
+    e = S_ALLOC( SyckEmitter );
+    e->headless = 0;
+    e->seq_map = 0;
+    e->use_header = 0;
+    e->use_version = 0;
+    e->sort_keys = 0;
+    e->anchor_format = NULL;
+    e->explicit_typing = 0;
+    e->best_width = 80;
+    e->block_style = block_arbitrary;
+    e->stage = doc_open;
+    e->indent = 2;
+    e->level = -1;
+    e->ignore_id = 0;
+    e->anchors = NULL;
+    e->markers = NULL;
+    e->bufsize = SYCK_BUFFERSIZE;
+    e->buffer = NULL;
+    e->marker = NULL;
+    e->bufpos = 0;
+    e->handler = NULL;
+    e->bonus = NULL;
+    return e;
+}
+
+int
+syck_st_free_anchors( char *key, char *name, char *arg )
+{
+    S_FREE( name );
+    return ST_CONTINUE;
+}
+
+int
+syck_st_free_markers( char *key, SyckEmitterNode *n, char *arg )
+{
+    S_FREE( n );
+    return ST_CONTINUE;
+}
+
+void
+syck_emitter_st_free( SyckEmitter *e )
+{
+    /*
+     * Free the anchor tables
+     */
+    if ( e->anchors != NULL )
+    {
+        st_foreach( e->anchors, syck_st_free_anchors, 0 );
+        st_free_table( e->anchors );
+        e->anchors = NULL;
+    }
+
+    /*
+     * Free the markers tables
+     */
+    if ( e->markers != NULL )
+    {
+        st_foreach( e->markers, syck_st_free_markers, 0 );
+        st_free_table( e->markers );
+        e->markers = NULL;
+    }
+}
+
+void
+syck_emitter_ignore_id( SyckEmitter *e, SYMID id )
+{
+    e->ignore_id = id;
+}
+
+void
+syck_emitter_handler( SyckEmitter *e, SyckOutputHandler hdlr )
+{
+    e->handler = hdlr;
+}
+
+void
+syck_free_emitter( SyckEmitter *e )
+{
+    /*
+     * Free tables
+     */
+    syck_emitter_st_free( e );
+    if ( e->buffer != NULL )
+    {
+        S_FREE( e->buffer );
+    }
+    S_FREE( e );
+}
+
+void
+syck_emitter_clear( SyckEmitter *e )
+{
+    if ( e->buffer == NULL )
+    {
+        e->buffer = S_ALLOC_N( char, e->bufsize );
+        S_MEMZERO( e->buffer, char, e->bufsize );
+    }
+    e->buffer[0] = '\0';
+    e->marker = e->buffer;
+    e->bufpos = 0;
+}
+
+/*
+ * Raw write to the emitter buffer.
+ */
+void
+syck_emitter_write( SyckEmitter *e, char *str, long len )
+{
+    long at;
+    ASSERT( str != NULL )
+    if ( e->buffer == NULL )
+    {
+        syck_emitter_clear( e );
+    }
+    
+    /*
+     * Flush if at end of buffer
+     */
+    at = e->marker - e->buffer;
+    if ( len + at > e->bufsize )
+    {
+        syck_emitter_flush( e );
+    }
+
+    /*
+     * Write to buffer
+     */
+    S_MEMCPY( e->marker, str, char, len );
+    e->marker += len;
+}
+
+/*
+ * Write a chunk of data out.
+ */
+void
+syck_emitter_flush( SyckEmitter *e )
+{
+    if ( ( e->stage == doc_open && ( e->headless == 0 || e->use_header == 1 ) ) || 
+         e->stage == doc_need_header )
+    {
+        if ( e->use_version == 1 )
+        {
+            char *header = S_ALLOC_N( char, 64 );
+            S_MEMZERO( header, char, 64 );
+            sprintf( header, "--- %YAML:%d.%d ", SYCK_YAML_MAJOR, SYCK_YAML_MINOR );
+            (e->handler)( e, header, strlen( header ) );
+            S_FREE( header );
+        }
+        else
+        {
+            (e->handler)( e, "--- ", 4 );
+        }
+        e->stage = doc_processing;
+    }
+    (e->handler)( e, e->buffer, e->marker - e->buffer );
+    e->bufpos += e->marker - e->buffer;
+    e->marker = e->buffer;
+}
+
+/*
+ * Emit a simple, unquoted string.
+ */
+void
+syck_emitter_simple( SyckEmitter *e, char *str, long len )
+{
+    e->seq_map = 0;
+    syck_emitter_write( e, str, len );
+}
+
+/*
+ * Shift the offsets of all applicable anchors
+ */
+int
+syck_adjust_anchors( char *key, SyckEmitterNode *n, struct adjust_arg *arg )
+{
+    if ( arg->startpos >= n->pos )
+    {
+        n->pos += arg->offset + 1;
+    }
+    return ST_CONTINUE;
+}
+
+/*
+ * call on start of an object's marshalling
+ * (handles anchors, returns an alias)
+ */
+char *
+syck_emitter_start_obj( SyckEmitter *e, SYMID oid )
+{
+    SyckEmitterNode *n = NULL;
+    char *anchor_name = NULL;
+
+    e->level++;
+    if ( oid != e->ignore_id )
+    {
+        /*
+         * Look for anchors
+         */
+        if ( e->markers == NULL )
+        {
+            e->markers = st_init_numtable();
+        }
+
+        /*
+         * Markers table initially marks the string position of the
+         * object.  Doesn't yet create an anchor, simply notes the
+         * position.
+         */
+        if ( ! st_lookup( e->markers, (st_data_t)oid, (st_data_t *)&n ) )
+        {
+            /*
+             * Store all markers
+             */
+            n = S_ALLOC( SyckEmitterNode );
+            n->is_shortcut = 0;
+            n->indent = e->level * e->indent;
+            n->pos = e->bufpos + ( e->marker - e->buffer );
+            st_insert( e->markers, (st_data_t)oid, (st_data_t)n );
+        }
+        else
+        {
+            if ( e->anchors == NULL )
+            {
+                e->anchors = st_init_numtable();
+            }
+
+            if ( ! st_lookup( e->anchors, (st_data_t)oid, (st_data_t *)&anchor_name ) )
+            {
+                int idx = 0;
+                /*
+                 * Second time hitting this object, let's give it an anchor
+                 */
+                idx = e->anchors->num_entries + 1;
+
+                /*
+                 * Create the anchor tag
+                 */
+                if ( n->pos >= e->bufpos )
+                {
+                    int alen;
+                    struct adjust_arg *args = S_ALLOC( struct adjust_arg );
+                    char *start = e->buffer + ( n->pos - e->bufpos );
+
+                    char *anc = ( e->anchor_format == NULL ? DEFAULT_ANCHOR_FORMAT : e->anchor_format );
+                    char *aname = S_ALLOC_N( char, strlen( anc ) + 10 );
+                    S_MEMZERO( aname, char, strlen( anc ) + 10 );
+                    sprintf( aname, anc, idx );
+
+                    /*
+                     * Write the anchor into the buffer
+                     * FIXME: Need to flush the buffer some, if there is not room for the anchor.
+                     */
+                    alen = strlen( aname );
+                    S_MEMMOVE( start + alen + 1, start, char, e->marker - start );
+                    S_MEMCPY( start + 1, aname, char, alen );
+                    start[0] = '&';
+                    e->marker += alen + 1;
+
+                    /*
+                     * Cycle through anchors, modify for the size of the anchor.
+                     */
+                    args->startpos = n->pos;
+                    args->offset = alen + 1;
+                    st_foreach( e->anchors, syck_adjust_anchors, args );
+                    S_FREE( args );
+
+                    /*
+                     * Insert into anchors table
+                     */
+                    st_insert( e->anchors, (st_data_t)oid, (st_data_t)aname );
+                }
+            }
+
+        }
+    }
+
+    return anchor_name;
+}
+
+/*
+ * call on completion of an object's marshalling
+ */
+void
+syck_emitter_end_obj( SyckEmitter *e )
+{
+    e->level--;
+}
+