+#include <string.h>
+#include <limits.h>
+
/* common */
#include "coll.h"
#include "xmalloc.h"
/* ca65 */
-#include "objfile.h"
+#include "global.h"
#include "lineinfo.h"
+#include "objfile.h"
/*****************************************************************************/
-/* Data */
+/* Data */
/*****************************************************************************/
+/* An invalid line info index */
+#define INV_LINEINFO_INDEX UINT_MAX
+
/* Collection containing all line infos */
-Collection LineInfoColl = STATIC_COLLECTION_INITIALIZER;
-unsigned LineInfoValid = 0; /* Valid, that is, used entries */
+static Collection LineInfoColl = STATIC_COLLECTION_INITIALIZER;
-/* Static pointer to last line info or NULL if not active */
-LineInfo* CurLineInfo = 0;
+/* Number of valid (=used) line infos in LineInfoColl */
+static unsigned UsedLineInfoCount;
+
+/* Entry in CurLineInfo */
+typedef struct LineInfoSlot LineInfoSlot;
+struct LineInfoSlot {
+ unsigned Type;
+ LineInfo* Info;
+};
+
+/* Dynamically allocated array of LineInfoSlots */
+static LineInfoSlot* CurLineInfo;
+static unsigned AllocatedSlots;
+static unsigned UsedSlots;
/*****************************************************************************/
-/* Code */
+/* struct LineInfo */
/*****************************************************************************/
-static LineInfo* NewLineInfo (unsigned File, unsigned long Line, unsigned Col)
+static LineInfo* NewLineInfo (unsigned Type, unsigned File,
+ unsigned long Line, unsigned Col)
/* Create and return a new line info. Usage will be zero. */
{
/* Allocate memory */
/* Initialize the fields */
LI->Usage = 0;
- LI->Index = 0; /* Currently invalid */
+ LI->Type = Type;
+ LI->Index = INV_LINEINFO_INDEX;
+ LI->Pos.Name = File;
LI->Pos.Line = Line;
LI->Pos.Col = Col;
- LI->Pos.Name = File;
-
- /* Insert this structure into the collection */
- CollAppend (&LineInfoColl, LI);
/* Return the new struct */
return LI;
-LineInfo* UseLineInfo (LineInfo* LI)
-/* Increase the reference count of the given line info and return it. The
- * function will gracefully accept NULL pointers and do nothing in this case.
+static void FreeLineInfo (LineInfo* LI)
+/* "Free" line info. If the usage counter is non zero, move it to the
+ * collection that contains all line infos, otherwise delete it.
+ * The function handles a NULL pointer transparently.
*/
{
if (LI) {
- if (LI->Usage++ == 0) {
- /* One more valid line info */
- ++LineInfoValid;
- }
+ if (LI->Usage > 0) {
+ CollAppend (&LineInfoColl, LI);
+ } else {
+ xfree (LI);
+ }
}
- return LI;
}
-void GenLineInfo (unsigned FileIndex, unsigned long LineNum, unsigned ColNum)
-/* Generate a new line info */
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+void InitLineInfo (void)
+/* Initialize the line infos */
+{
+ /* Allocate 8 slots */
+ AllocatedSlots = 8;
+ CurLineInfo = xmalloc (AllocatedSlots * sizeof (LineInfoSlot));
+
+ /* Initalize the predefined slots */
+ UsedSlots = 2;
+ CurLineInfo[LI_SLOT_ASM].Type = LI_TYPE_ASM;
+ CurLineInfo[LI_SLOT_ASM].Info = 0;
+ CurLineInfo[LI_SLOT_EXT].Type = LI_TYPE_EXT;
+ CurLineInfo[LI_SLOT_EXT].Info = 0;
+}
+
+
+
+unsigned AllocLineInfoSlot (unsigned Type)
+/* Allocate a line info slot of the given type and return the slot index */
+{
+ /* Grow the array if necessary */
+ if (UsedSlots >= AllocatedSlots) {
+ LineInfoSlot* NewLineInfo;
+ AllocatedSlots *= 2;
+ NewLineInfo = xmalloc (AllocatedSlots * sizeof (LineInfoSlot));
+ memcpy (NewLineInfo, CurLineInfo, UsedSlots * sizeof (LineInfoSlot));
+ xfree (CurLineInfo);
+ CurLineInfo = NewLineInfo;
+ }
+
+ /* Array is now big enough, add the new data */
+ CurLineInfo[UsedSlots].Type = Type;
+ CurLineInfo[UsedSlots].Info = 0;
+
+ /* Increment the count and return the index of the new slot */
+ return UsedSlots++;
+}
+
+
+
+void FreeLineInfoSlot (unsigned Slot)
+/* Free the line info in the given slot. Note: Alloc/Free must be used in
+ * FIFO order.
+ */
+{
+ /* Check the parameter */
+ PRECONDITION (Slot == UsedSlots - 1);
+
+ /* Free the last entry */
+ FreeLineInfo (CurLineInfo[Slot].Info);
+ --UsedSlots;
+}
+
+
+
+void GenLineInfo (unsigned Slot, unsigned File, unsigned long Line, unsigned Col)
+/* Generate a new line info in the given slot */
+{
+ /* Get a pointer to the slot */
+ LineInfoSlot* S = CurLineInfo + Slot;
+
+ /* Check if we already have data */
+ if (S->Info) {
+ /* Generate new data only if it is different from the existing. */
+ if (S->Info->Pos.Col == Col &&
+ S->Info->Pos.Line == Line &&
+ S->Info->Pos.Name == File) {
+ /* Already there */
+ return;
+ }
+
+ /* We have data, but it's not identical. If it is in use, copy it to
+ * line info collection, otherwise delete it.
+ */
+ FreeLineInfo (S->Info);
+
+ }
+
+ /* Allocate new data */
+ S->Info = NewLineInfo (S->Type, File, Line, Col);
+}
+
+
+
+void ClearLineInfo (unsigned Slot)
+/* Clear the line info in the given slot */
+{
+ /* Get a pointer to the slot */
+ LineInfoSlot* S = CurLineInfo + Slot;
+
+ /* Free the struct and zero the pointer */
+ FreeLineInfo (S->Info);
+ S->Info = 0;
+}
+
+
+
+LineInfo* GetLineInfo (unsigned Slot)
+/* Get the line info from the given slot */
{
- /* Create a new line info and make it current */
- CurLineInfo = NewLineInfo (FileIndex, LineNum, ColNum);
+ PRECONDITION (Slot < UsedSlots);
+ return CurLineInfo[Slot].Info;
+}
+
+
+
+void GetFullLineInfo (Collection* LineInfos)
+/* Return full line infos, that is line infos for all slots in LineInfos. The
+ * function does also increase the usage counter for all line infos returned.
+ */
+{
+ unsigned I;
+
+ /* Copy all valid line infos to the collection */
+ for (I = 0; I < UsedSlots; ++I) {
+
+ /* Get the slot */
+ LineInfoSlot* S = CurLineInfo + I;
+
+ /* Ignore empty slots */
+ if (S->Info) {
+ ++S->Info->Usage;
+ CollAppend (LineInfos, S->Info);
+ }
+ }
+}
+
+
+
+LineInfo* UseLineInfo (LineInfo* LI)
+/* Increase the reference count of the given line info and return it. The
+ * function will gracefully accept NULL pointers and do nothing in this case.
+ */
+{
+ if (LI) {
+ ++LI->Usage;
+ }
+ return LI;
}
-void ClearLineInfo (void)
-/* Clear the current line info */
+LineInfo* ReleaseLineInfo (LineInfo* LI)
+/* Decrease the reference count of the given line info and return it. The
+ * function will gracefully accept NULL pointers and do nothing in this case.
+ */
{
- CurLineInfo = 0;
+ if (LI) {
+ /* Cannot decrease below zero */
+ CHECK (LI->Usage != 0);
+ --LI->Usage;
+ }
+ return LI;
}
static int CmpLineInfo (void* Data attribute ((unused)),
- const void* LI1_, const void* LI2_)
+ const void* LI1_, const void* LI2_)
/* Compare function for the sort */
{
/* Cast the pointers */
const LineInfo* LI2 = LI2_;
/* Unreferenced line infos are always larger, otherwise sort by file,
- * then by line.
+ * then by line, then by column.
*/
if ((LI1->Usage == 0) == (LI2->Usage == 0)) {
/* Both are either referenced or unreferenced */
- if (LI1->Pos.Name< LI2->Pos.Name) {
- return -1;
- } else if (LI1->Pos.Name > LI2->Pos.Name) {
- return 1;
- } else if (LI1->Pos.Line < LI2->Pos.Line) {
- return -1;
- } else if (LI1->Pos.Line > LI2->Pos.Line) {
- return 1;
- } else {
- return 0;
- }
+ return CompareFilePos (&LI1->Pos, &LI2->Pos);
} else {
if (LI1->Usage > 0) {
return -1;
+void WriteLineInfo (const Collection* LineInfos)
+/* Write a list of line infos to the object file. MakeLineInfoIndex has to
+ * be called before!
+ */
+{
+ unsigned I;
+
+ /* Write the count */
+ ObjWriteVar (CollCount (LineInfos));
+
+ /* Write the line info indices */
+ for (I = 0; I < CollCount (LineInfos); ++I) {
+ ObjWriteVar (((const LineInfo*) CollConstAt (LineInfos, I))->Index);
+ }
+}
+
+
+
void MakeLineInfoIndex (void)
-/* Sort the line infos and drop all unreferenced ones */
+/* Index the line infos */
{
unsigned I;
/* Sort the collection */
CollSort (&LineInfoColl, CmpLineInfo, 0);
- /* Walk over the list and index the line infos. */
- for (I = 0; I < LineInfoValid; ++I) {
+ /* Walk over the list, index the line infos and count the used ones */
+ UsedLineInfoCount = 0;
+ for (I = 0; I < CollCount (&LineInfoColl); ++I) {
/* Get a pointer to this line info */
LineInfo* LI = CollAtUnchecked (&LineInfoColl, I);
- LI->Index = I;
+
+ /* If it is invalid, terminate the loop. All unused line infos were
+ * placed at the end of the collection by the sort.
+ */
+ if (LI->Usage == 0) {
+ break;
+ }
+
+ /* Index and count this one */
+ LI->Index = I;
+ ++UsedLineInfoCount;
}
}
-void WriteLineInfo (void)
+void WriteLineInfos (void)
/* Write a list of all line infos to the object file. */
{
/* Tell the object file module that we're about to write line infos */
unsigned I;
/* Write the line info count to the list */
- ObjWriteVar (LineInfoValid);
+ ObjWriteVar (UsedLineInfoCount);
- /* Walk through list and write all line infos that have references.
- * Because of the sort, this are exactly the first LineInfoValid
- * ones.
- */
- for (I = 0; I < LineInfoValid; ++I) {
+ /* Walk over the list and write all line infos */
+ for (I = 0; I < UsedLineInfoCount; ++I) {
/* Get a pointer to this line info */
- LineInfo* LI = CollAtUnchecked (&LineInfoColl, I);
+ LineInfo* LI = CollAt (&LineInfoColl, I);
/* Write the source file position */
ObjWritePos (&LI->Pos);
}
projects / cc65 / blobdiff