unsigned AddLiteral (const char* S)
/* Add a literal string to the literal pool. Return the starting offset into
* the pool
*/
{
/* Remember the starting offset */
unsigned Start = SB_GetLen (&LiteralPool);
/* Copy the string including the terminator growing the buffer if needed */
SB_AppendBuf (&LiteralPool, S, strlen (S) + 1);
/* Return the starting offset */
return Start;
}
static Literal* NewLiteral (const void* Buf, unsigned Len)
/* Create a new literal and return it */
{
/* Allocate memory */
Literal* L = xmalloc (sizeof (*L));
/* Initialize the fields */
L->Label = GetLocalLabel ();
L->RefCount = 0;
L->Output = 0;
SB_Init (&L->Data);
SB_AppendBuf (&L->Data, Buf, Len);
/* Return the new literal */
return L;
}
static void LineMarkerOrComment ()
/* Handle a line beginning with '#'. Possible interpretations are:
** - #line <lineno> ["<filename>"] (C preprocessor input)
** - # <lineno> "<filename>" [<flag>]... (gcc preprocessor output)
** - #<comment>
*/
{
unsigned long LineNo = 0;
int LineDirective = 0;
StrBuf SrcNameBuf = AUTO_STRBUF_INITIALIZER;
/* Skip the first "# " */
NextChar ();
SkipBlanks (1);
/* Check "line" */
if (C == 'l') {
char MaybeLine [6];
unsigned I;
for (I = 0; I < sizeof MaybeLine - 1 && C != EOF && IsAlNum (C); ++I) {
MaybeLine [I] = C;
NextChar ();
}
MaybeLine [I] = 0;
if (strcmp (MaybeLine, "line") != 0) {
goto NotMarker;
}
LineDirective = 1;
SkipBlanks (1);
}
/* Get line number */
if (C == EOF || !IsDigit (C)) {
goto NotMarker;
}
LineNo = GetDecimalToken ();
SkipBlanks (1);
/* Get the source file name */
if (C != '\"') {
/* The source file name is missing */
if (LineDirective && C == '\n') {
/* got #line <lineno> */
NextChar ();
InputLine = LineNo;
goto Last;
} else {
goto NotMarker;
}
}
NextChar ();
while (C != EOF && C != '\n' && C != '\"') {
char DecodeBuf [2];
unsigned I = 0;
if (GetEncodedChar (DecodeBuf, &I, sizeof DecodeBuf) < 0) {
goto BadMarker;
}
SB_AppendBuf (&SrcNameBuf, DecodeBuf, I);
}
if (C != '\"') {
goto BadMarker;
}
NextChar ();
/* Ignore until the end of line */
while (C != EOF && C != '\n') {
NextChar ();
}
/* Accepted a line marker */
SB_Terminate (&SrcNameBuf);
xfree (InputSrcName);
InputSrcName = SB_GetBuf (&SrcNameBuf);
SB_Init (&SrcNameBuf);
InputLine = (unsigned)LineNo;
NextChar ();
goto Last;
BadMarker:
InfoWarning ("Bad line marker");
NotMarker:
while (C != EOF && C != '\n') {
NextChar ();
}
NextChar ();
Last:
SB_Done (&SrcNameBuf);
}
