Fixed a bug: Compiling an empty source file led to an internal error.

Changed the lineinfo module to take dynamically allocated string buffers
instead of char*.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3523 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/cc65/input.c

@@ -205,6 +205,9 @@ static IFile* FindFile (const char* Name)
 void OpenMainFile (const char* Name)
 /* Open the main file. Will call Fatal() in case of failures. */
 {
+    AFile* MainFile;
+
+
     /* Setup a new IFile structure for the main file */
     IFile* IF = NewIFile (Name);
 
@@ -216,10 +219,15 @@ void OpenMainFile (const char* Name)
     }
 
     /* Allocate a new AFile structure for the file */
-    (void) NewAFile (IF, F);
+    MainFile = NewAFile (IF, F);
 
     /* Allocate the input line buffer */
     Line = NewStrBuf ();
+
+    /* Update the line infos, so we have a valid line info even at start of
+     * the main file before the first line is read.
+     */
+    UpdateLineInfo (MainFile->Input, MainFile->Line, Line);
 }
 
 
@@ -478,7 +486,7 @@ int NextLine (void)
     InitLine (Line);
 
     /* Create line information for this line */
-    UpdateLineInfo (Input->Input, Input->Line, SB_GetConstBuf (Line));
+    UpdateLineInfo (Input->Input, Input->Line, Line);
 
     /* Done */
     return 1;

src/cc65/lineinfo.c

@@ -64,22 +64,25 @@ static LineInfo* CurLineInfo = 0;
 
 
 
-static LineInfo* NewLineInfo (struct IFile* F, unsigned LineNum, const char* Line)
+static LineInfo* NewLineInfo (struct IFile* F, unsigned LineNum, const StrBuf* Line)
 /* Create and return a new line info. Ref count will be 1. */
 {
-    unsigned  Len;
-    LineInfo* LI;
-    char*     T;
+    unsigned    Len;
+    LineInfo*   LI;
+    const char* S;
+    char*       T;
+
+    /* Get the length of the line and a pointer to the line buffer */
+    Len = SB_GetLen (Line);
+    S   = SB_GetConstBuf (Line);
 
     /* Skip leading spaces in Line */
-    while (IsBlank (*Line)) {
-    	++Line;
+    while (Len > 0 && IsBlank (*S)) {
+       	++S;
+        --Len;
     }
 
-    /* Calculate the length of the line */
-    Len = strlen (Line);
-
-    /* Allocate memory */
+    /* Allocate memory for the line info and the input line */
     LI = xmalloc (sizeof (LineInfo) + Len);
 
     /* Initialize the fields */
@@ -93,13 +96,13 @@ static LineInfo* NewLineInfo (struct IFile* F, unsigned LineNum, const char* Lin
      */
     T = LI->Line;
     while (Len--) {
-       	if (*Line == '\t') {
-	    *T = ' ';
-	} else {
-	    *T = *Line;
-	}
-	++Line;
-	++T;
+       	if (*S == '\t') {
+       	    *T = ' ';
+       	} else {
+       	    *T = *S;
+       	}
+       	++S;
+       	++T;
     }
 
     /* Add the terminator */
@@ -153,7 +156,7 @@ LineInfo* GetCurLineInfo (void)
 
 
 
-void UpdateLineInfo (struct IFile* F, unsigned LineNum, const char* Line)
+void UpdateLineInfo (struct IFile* F, unsigned LineNum, const StrBuf* Line)
 /* Update the line info - called if a new line is read */
 {
     /* If a current line info exists, release it */
@@ -165,7 +168,7 @@ void UpdateLineInfo (struct IFile* F, unsigned LineNum, const char* Line)
      * of the supplied one to save some memory.
      */
     if (!AddSource) {
-	Line = "";
+	Line = &EmptyStrBuf;
     }
 
     /* Create a new line info */

src/cc65/lineinfo.h

@@ -38,6 +38,11 @@
 
 
                    
+/* common */
+#include "strbuf.h"
+
+
+
 /*****************************************************************************/
 /*				   Forwards                                  */
 /*****************************************************************************/
@@ -87,7 +92,7 @@ LineInfo* GetCurLineInfo (void);
  * increased, use UseLineInfo for that purpose.
  */
 
-void UpdateLineInfo (struct IFile* F, unsigned LineNum, const char* Line);
+void UpdateLineInfo (struct IFile* F, unsigned LineNum, const StrBuf* Line);
 /* Update the line info - called if a new line is read */
 
 const char* GetInputName (const LineInfo* LI);