From dcc89a6f6173792e64b8312a8080f05500abe8de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Enrico=20Tr=C3=B6ger?= <enrico.troeger@uvena.de>
Date: Tue, 9 Jun 2009 21:02:46 +0000
Subject: [PATCH] Parse Pascal calltips (closes #2802640).

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@3849 ea778897-0a13-0410-b9d1-a72fbfd435f5
---
 ChangeLog           |  6 ++++
 tagmanager/pascal.c | 84 ++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 86 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 59362f1a..045c23ed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-06-09  Enrico Tröger  <enrico(dot)troeger(at)uvena(dot)de>
+
+ * tagmanager/pascal.c:
+   Parse Pascal calltips (closes #2802640).
+
+
 2009-06-09  Nick Treleaven  <nick(dot)treleaven(at)btinternet(dot)com>
 
  * src/filetypes.c, src/ui_utils.c:
diff --git a/tagmanager/pascal.c b/tagmanager/pascal.c
index ce9079f2..fac7e66c 100644
--- a/tagmanager/pascal.c
+++ b/tagmanager/pascal.c
@@ -20,6 +20,7 @@
 #include "entry.h"
 #include "parse.h"
 #include "read.h"
+#include "main.h"
 #include "vstring.h"
 
 /*
@@ -30,7 +31,7 @@ typedef enum {
 } pascalKind;
 
 static kindOption PascalKinds [] = {
-    { TRUE, 'f', "function",  "functions"},
+    { TRUE, 'f', "function", "functions"},
     { TRUE, 'f', "function", "procedures"}
 };
 
@@ -39,7 +40,8 @@ static kindOption PascalKinds [] = {
 */
 
 static void createPascalTag (tagEntryInfo* const tag,
-			     const vString* const name, const int kind)
+			     const vString* const name, const int kind,
+			     const char *arglist, const char *vartype)
 {
     if (PascalKinds [kind].enabled  &&  name != NULL  &&  vStringLength (name) > 0)
     {
@@ -47,6 +49,8 @@ static void createPascalTag (tagEntryInfo* const tag,
 
         tag->kindName = PascalKinds [kind].name;
         tag->kind     = PascalKinds [kind].letter;
+        tag->extensionFields.arglist = arglist;
+        tag->extensionFields.varType = vartype;
     }
     else
         initTagEntry (tag, NULL);
@@ -79,6 +83,69 @@ static boolean tail (const char *cp)
     return result;
 }
 
+static void parseArglist(const char *buf, char **arglist, char **vartype)
+{
+    char *c, *start, *end;
+    int level;
+
+    if (NULL == buf || NULL == arglist)
+	return;
+
+    c = strdup(buf);
+    /* parse argument list which can be missing like in "function ginit:integer;" */
+    if (NULL != (start = strchr(c, '(')))
+    {
+	for (level = 1, end = start + 1; level > 0; ++end)
+	{
+	    if ('\0' == *end)
+		break;
+	    else if ('(' == *end)
+		++ level;
+	    else if (')' == *end)
+		-- level;
+	}
+    }
+    else /* if no argument list was found, continue looking for a return value */
+    {
+	start = "()";
+	end = c;
+    }
+
+    /* parse return type if requested by passing a non-NULL vartype argument */
+    if (NULL != vartype)
+    {
+	char *var, *var_start;
+
+	*vartype = NULL;
+
+	if (NULL != (var = strchr(end, ':')))
+	{
+	    var++; /* skip ':' */
+	    while (isspace((int) *var))
+		++var;
+
+	    if (starttoken(*var))
+	    {
+		var_start = var;
+		var++;
+		while (intoken(*var))
+		    var++;
+		if (endtoken(*var))
+		{
+		    *var = '\0';
+		    *vartype = strdup(var_start);
+		}
+	    }
+	}
+    }
+
+    *end = '\0';
+    *arglist = strdup(start);
+
+    eFree(c);
+}
+
+
 /* Algorithm adapted from from GNU etags.
  * Locates tags for procedures & functions.  Doesn't do any type- or
  * var-definitions.  It does look for the keyword "extern" or "forward"
@@ -89,6 +156,8 @@ static void findPascalTags (void)
 {
     vString *name = vStringNew ();
     tagEntryInfo tag;
+    char *arglist = NULL;
+    char *vartype = NULL;
     pascalKind kind = K_FUNCTION;
 				/* each of these flags is TRUE iff: */
     boolean incomment = FALSE;	/* point is inside a comment */
@@ -208,7 +277,11 @@ static void findPascalTags (void)
 	    for (cp = dbp  ;  *cp != '\0' && !endtoken (*cp)  ;  cp++)
 		continue;
 	    vStringNCopyS (name, (const char*) dbp,  cp - dbp);
-	    createPascalTag (&tag, name, kind);
+	    eFree(arglist);
+	    if (kind == K_FUNCTION)
+		eFree(vartype);
+	    parseArglist((const char*) cp, &arglist, (kind == K_FUNCTION) ? &vartype : NULL);
+	    createPascalTag (&tag, name, kind, arglist, vartype);
 	    dbp = cp;		/* set dbp to e-o-token */
 	    get_tagname = FALSE;
 	    found_tag = TRUE;
@@ -254,8 +327,11 @@ static void findPascalTags (void)
 		    }
 		    break;
 	    }
-	}				/* while not eof */
+	}  /* while not eof */
     }
+    eFree(arglist);
+    eFree(vartype);
+    vStringDelete(name);
 }
 
 extern parserDefinition* PascalParser (void)