[main] fix initializer of MD_Node

docs/md_docs.md

@@ -198,9 +198,12 @@
 ////////////////////////////////
 //~ Code Location Info.
 
+@doc("Source code location using file, line, column coordinates")
 @struct MD_CodeLoc: {
  filename: MD_String8,
+ @doc("Line numbers are 1 based, the lowest valid location is on line number 1.")
  line: MD_u32,
+ @doc("Column numbers are 1 based, the lowest valid location is on column number 1.")
  column: MD_u32,
 };
 
@@ -815,6 +818,22 @@
  return: MD_ParseResult,
 };
 
+////////////////////////////////
+//~ Location Conversion
+
+@func MD_CodeLocFromFileOffset: {
+ filename: MD_String8,
+ base: *MD_u8,
+ off: *MD_u8,
+ return: MD_CodeLoc,
+};
+
+@func MD_CodeLocFromNode: {
+ node: *MD_Node,
+ return: MD_CodeLoc,
+};
+
+
 ////////////////////////////////
 //~ Tree/List Building
 
@@ -927,11 +946,6 @@
  return: MD_b32,
 };
 
-@func MD_CodeLocFromNode: {
- node: *MD_Node,
- return: MD_CodeLoc,
-};
-
 @func MD_ChildCountFromNode: {
  node: *MD_Node,
  return: MD_i64,

source/md.h

@@ -723,6 +723,10 @@ MD_FUNCTION MD_ParseResult MD_ParseOneNode     (MD_String8 filename, MD_String8
 MD_FUNCTION MD_ParseResult MD_ParseWholeString (MD_String8 filename, MD_String8 contents);
 MD_FUNCTION MD_ParseResult MD_ParseWholeFile   (MD_String8 filename);
 
+//~ Location Conversion
+MD_FUNCTION MD_CodeLoc MD_CodeLocFromFileOffset(MD_String8 filename, MD_u8 *base, MD_u8 *off);
+MD_FUNCTION MD_CodeLoc MD_CodeLocFromNode(MD_Node *node);
+
 //~ Tree/List Building
 MD_FUNCTION MD_b32   MD_NodeIsNil(MD_Node *node);
 MD_FUNCTION MD_Node *MD_NilNode(void);
@@ -744,7 +748,6 @@ MD_FUNCTION MD_Node *  MD_ChildFromIndex(MD_Node *node, int n);
 MD_FUNCTION MD_Node *  MD_TagFromIndex(MD_Node *node, int n);
 MD_FUNCTION MD_Node *  MD_TagArgFromIndex(MD_Node *node, MD_String8 tag_string, int n);
 MD_FUNCTION MD_b32     MD_NodeHasTag(MD_Node *node, MD_String8 tag_string);
-MD_FUNCTION MD_CodeLoc MD_CodeLocFromNode(MD_Node *node);
 MD_FUNCTION MD_i64     MD_ChildCountFromNode(MD_Node *node);
 MD_FUNCTION MD_i64     MD_TagCountFromNode(MD_Node *node);
 MD_FUNCTION MD_Node *  MD_Deref(MD_Node *node);

source/md_impl.c

@@ -25,10 +25,12 @@ static MD_Node _md_nil_node =
     MD_ZERO_STRUCT,        // string
     MD_ZERO_STRUCT,        // whole_string
     0xdeadffffffffffull,   // string_hash
+    MD_ZERO_STRUCT,        // comment_before
+    MD_ZERO_STRUCT,        // comment_after
+    {(MD_u8*)"`NIL DD NODE`", 13}, // filename
+    0,                     // file_contents
+    0,                     // at
     &_md_nil_node,         // ref_target
-    {(MD_u8*)"`NIL DD NODE`", 13},
-    0,
-    0,
 };
 
 MD_PRIVATE_FUNCTION_IMPL void
@@ -1520,28 +1522,6 @@ MD_Parse_RequireKind(MD_ParseCtx *ctx, MD_TokenKind kind, MD_Token *out_token)
     return result;
 }
 
-MD_PRIVATE_FUNCTION_IMPL MD_CodeLoc
-_MD_CodeLocFromFileOffset(MD_String8 filename, MD_u8 * file_contents, MD_u8 *at)
-{
-    MD_CodeLoc loc;
-    loc.filename = filename;
-    loc.line = 1;
-    loc.column = 1;
-    for(MD_u64 i = 0; file_contents+i < at && file_contents[i]; i += 1)
-    {
-        if(file_contents[i] == '\n')
-        {
-            loc.line += 1;
-            loc.column = 1;
-        }
-        else
-        {
-            loc.column += 1;
-        }
-    }
-    return loc;
-}
-
 MD_PRIVATE_FUNCTION_IMPL void
 _MD_Error(MD_ParseCtx *ctx, MD_Node *node, MD_MessageKind kind, char *fmt, ...)
 {
@@ -2173,6 +2153,36 @@ MD_ParseWholeFile(MD_String8 filename)
     return parse;
 }
 
+MD_PRIVATE_FUNCTION_IMPL MD_CodeLoc
+MD_CodeLocFromFileOffset(MD_String8 filename, MD_u8 *base, MD_u8 *at)
+{
+    MD_CodeLoc loc;
+    loc.filename = filename;
+    loc.line = 1;
+    loc.column = 1;
+    for(MD_u64 i = 0; base+i < at && base[i]; i += 1)
+    {
+        if(base[i] == '\n')
+        {
+            loc.line += 1;
+            loc.column = 1;
+        }
+        else
+        {
+            loc.column += 1;
+        }
+    }
+    return loc;
+}
+
+MD_FUNCTION_IMPL MD_CodeLoc
+MD_CodeLocFromNode(MD_Node *node)
+{
+    MD_CodeLoc loc = MD_CodeLocFromFileOffset(node->filename, node->file_contents, node->at);
+    return loc;
+}
+
+
 MD_FUNCTION_IMPL MD_b32
 MD_NodeIsNil(MD_Node *node)
 {
@@ -2374,13 +2384,6 @@ MD_NodeHasTag(MD_Node *node, MD_String8 tag_string)
     return !MD_NodeIsNil(MD_TagFromString(node, tag_string));
 }
 
-MD_FUNCTION_IMPL MD_CodeLoc
-MD_CodeLocFromNode(MD_Node *node)
-{
-    MD_CodeLoc loc = _MD_CodeLocFromFileOffset(node->filename, node->file_contents, node->at);
-    return loc;
-}
-
 MD_FUNCTION_IMPL MD_i64
 MD_ChildCountFromNode(MD_Node *node)
 {