static void FuncString (void)
/* Handle the .STRING function */
{
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
/* Skip it */
NextTok ();
/* Left paren expected */
ConsumeLParen ();
/* Accept identifiers or numeric expressions */
if (CurTok.Tok == TOK_LOCAL_IDENT) {
/* Save the identifier, then skip it */
SB_Copy (&Buf, &CurTok.SVal);
NextTok ();
} else if (CurTok.Tok == TOK_NAMESPACE || CurTok.Tok == TOK_IDENT) {
/* Parse a fully qualified symbol name. We cannot use
* ParseScopedSymName here since the name may be invalid.
*/
int NameSpace;
do {
NameSpace = (CurTok.Tok == TOK_NAMESPACE);
if (NameSpace) {
SB_AppendStr (&Buf, "::");
} else {
SB_Append (&Buf, &CurTok.SVal);
}
NextTok ();
} while ((NameSpace != 0 && CurTok.Tok == TOK_IDENT) ||
(NameSpace == 0 && CurTok.Tok == TOK_NAMESPACE));
} else {
/* Numeric expression */
long Val = ConstExpression ();
SB_Printf (&Buf, "%ld", Val);
}
/* We expect a closing parenthesis, but will not skip it but replace it
* by the string token just created.
*/
if (CurTok.Tok != TOK_RPAREN) {
Error ("`)' expected");
} else {
CurTok.Tok = TOK_STRCON;
SB_Copy (&CurTok.SVal, &Buf);
SB_Terminate (&CurTok.SVal);
}
/* Free string memory */
SB_Done (&Buf);
}
static Macro* NewMacro (const StrBuf* Name, unsigned char Style)
/* Generate a new macro entry, initialize and return it */
{
/* Allocate memory */
Macro* M = xmalloc (sizeof (Macro));
/* Initialize the macro struct */
InitHashNode (&M->Node);
M->LocalCount = 0;
M->Locals = 0;
M->ParamCount = 0;
M->Params = 0;
M->TokCount = 0;
M->TokRoot = 0;
M->TokLast = 0;
SB_Init (&M->Name);
SB_Copy (&M->Name, Name);
M->Expansions = 0;
M->Style = Style;
M->Incomplete = 1;
/* Insert the macro into the hash table */
HT_Insert (&MacroTab, &M->Node);
/* Return the new macro struct */
return M;
}
static Macro* NewMacro (const StrBuf* Name, unsigned char Style)
/* Generate a new macro entry, initialize and return it */
{
/* Allocate memory */
Macro* M = xmalloc (sizeof (Macro));
/* Initialize the macro struct */
InitHashNode (&M->Node, M);
M->LocalCount = 0;
M->Locals = 0;
M->ParamCount = 0;
M->Params = 0;
M->TokCount = 0;
M->TokRoot = 0;
M->TokLast = 0;
M->Style = Style;
M->Name = AUTO_STRBUF_INITIALIZER;
SB_Copy (&M->Name, Name);
/* Insert the macro into the global macro list */
M->List = MacroRoot;
MacroRoot = M;
/* Insert the macro into the hash table */
HT_Insert (&MacroTab, &M->Node);
/* Return the new macro struct */
return M;
}
void TokSet (TokNode* T)
/* Set the scanner token from the given token node */
{
/* Set the values */
Tok = T->Tok;
WS = T->WS;
IVal = T->IVal;
SB_Copy (&SVal, &T->SVal);
}
static IdDesc* NewIdDesc (const StrBuf* Id)
/* Create a new IdDesc, initialize and return it */
{
/* Allocate memory */
IdDesc* ID = xmalloc (sizeof (IdDesc));
/* Initialize the struct */
ID->Next = 0;
SB_Init (&ID->Id);
SB_Copy (&ID->Id, Id);
/* Return the new struct */
return ID;
}
static IdDesc* NewIdDesc (const StrBuf* Id)
/* Create a new IdDesc, initialize and return it */
{
/* Allocate memory */
IdDesc* I = xmalloc (sizeof (IdDesc));
/* Initialize the struct */
I->Next = 0;
I->Id = AUTO_STRBUF_INITIALIZER;
SB_Copy (&I->Id, Id);
/* Return the new struct */
return I;
}
static void FuncConcat (void)
/* Handle the .CONCAT function */
{
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
/* Skip it */
NextTok ();
/* Left paren expected */
ConsumeLParen ();
/* Concatenate any number of strings */
while (1) {
/* Next token must be a string */
if (!LookAtStrCon ()) {
SB_Done (&Buf);
return;
}
/* Append the string */
SB_Append (&Buf, &CurTok.SVal);
/* Skip the string token */
NextTok ();
/* Comma means another argument */
if (CurTok.Tok == TOK_COMMA) {
NextTok ();
} else {
/* Done */
break;
}
}
/* We expect a closing parenthesis, but will not skip it but replace it
* by the string token just created.
*/
if (CurTok.Tok != TOK_RPAREN) {
Error ("`)' expected");
} else {
CurTok.Tok = TOK_STRCON;
SB_Copy (&CurTok.SVal, &Buf);
SB_Terminate (&CurTok.SVal);
}
/* Free the string buffer */
SB_Done (&Buf);
}
TokNode* NewTokNode (void)
/* Create and return a token node with the current token value */
{
TokNode* T;
/* Allocate memory */
T = xmalloc (sizeof (TokNode));
/* Initialize the token contents */
T->Next = 0;
T->Tok = Tok;
T->WS = WS;
T->IVal = IVal;
T->SVal = AUTO_STRBUF_INITIALIZER;
SB_Copy (&T->SVal, &SVal);
/* Return the node */
return T;
}
void DbgInfoFile (void)
/* Parse and handle FILE subcommand of the .dbg pseudo instruction */
{
StrBuf Name = STATIC_STRBUF_INITIALIZER;
unsigned long Size;
unsigned long MTime;
/* Parameters are separated by a comma */
ConsumeComma ();
/* Name */
if (CurTok.Tok != TOK_STRCON) {
ErrorSkip ("String constant expected");
return;
}
SB_Copy (&Name, &CurTok.SVal);
NextTok ();
/* Comma expected */
ConsumeComma ();
/* Size */
Size = ConstExpression ();
/* Comma expected */
ConsumeComma ();
/* MTime */
MTime = ConstExpression ();
/* Insert the file into the table */
AddFile (&Name, FT_DBGINFO, Size, MTime);
/* Free memory used for Name */
SB_Done (&Name);
}
SymTable* ParseScopedIdent (StrBuf* Name, StrBuf* FullName)
/* Parse a (possibly scoped) identifer. The scope of the name must exist and
* is returned as function result, while the last part (the identifier) which
* may be either a symbol or a scope depending on the context is returned in
* Name. FullName is a string buffer that is used to store the full name of
* the identifier including the scope. It is used internally and may be used
* by the caller for error messages or similar.
*/
{
SymTable* Scope;
/* Clear both passed string buffers */
SB_Clear (Name);
SB_Clear (FullName);
/* Get the starting table */
if (CurTok.Tok == TOK_NAMESPACE) {
/* Start from the root scope */
Scope = RootScope;
} else if (CurTok.Tok == TOK_IDENT) {
/* Remember the name and skip it */
SB_Copy (Name, &CurTok.SVal);
NextTok ();
/* If no namespace symbol follows, we're already done */
if (CurTok.Tok != TOK_NAMESPACE) {
SB_Terminate (FullName);
return CurrentScope;
}
/* Pass the scope back to the caller */
SB_Append (FullName, Name);
/* The scope must exist, so search for it starting with the current
* scope.
*/
Scope = SymFindAnyScope (CurrentScope, Name);
if (Scope == 0) {
/* Scope not found */
SB_Terminate (FullName);
Error ("No such scope: `%m%p'", FullName);
return 0;
}
} else {
/* Invalid token */
Error ("Identifier expected");
return 0;
}
/* Skip the namespace token that follows */
SB_AppendStr (FullName, "::");
NextTok ();
/* Resolve scopes. */
while (1) {
/* Next token must be an identifier. */
if (CurTok.Tok != TOK_IDENT) {
Error ("Identifier expected");
return 0;
}
/* Remember and skip the identifier */
SB_Copy (Name, &CurTok.SVal);
NextTok ();
/* If a namespace token follows, we search for another scope, otherwise
* the name is a symbol and we're done.
*/
if (CurTok.Tok != TOK_NAMESPACE) {
/* Symbol */
return Scope;
}
/* Pass the scope back to the caller */
SB_Append (FullName, Name);
/* Search for the child scope */
Scope = SymFindScope (Scope, Name, SYM_FIND_EXISTING);
if (Scope == 0) {
/* Scope not found */
Error ("No such scope: `%m%p'", FullName);
return 0;
}
/* Skip the namespace token that follows */
SB_AppendStr (FullName, "::");
NextTok ();
}
}
static void FuncSPrintF (void)
/* Handle the .SPRINTF function */
{
StrBuf Format = STATIC_STRBUF_INITIALIZER; /* User supplied format */
StrBuf R = STATIC_STRBUF_INITIALIZER; /* Result string */
StrBuf F1 = STATIC_STRBUF_INITIALIZER; /* One format spec from F */
StrBuf R1 = STATIC_STRBUF_INITIALIZER; /* One result */
char C;
int Done;
long IVal; /* Integer value */
/* Skip the .SPRINTF token */
NextTok ();
/* Left paren expected */
ConsumeLParen ();
/* First argument is a format string. Remember and skip it */
if (!LookAtStrCon ()) {
return;
}
SB_Copy (&Format, &CurTok.SVal);
NextTok ();
/* Walk over the format string, generating the function result in R */
while (1) {
/* Get the next char from the format string and check for EOS */
if (SB_Peek (&Format) == '\0') {
break;
}
/* Check for a format specifier */
if (SB_Peek (&Format) != '%') {
/* No format specifier, just copy */
SB_AppendChar (&R, SB_Get (&Format));
continue;
}
SB_Skip (&Format);
if (SB_Peek (&Format) == '%') {
/* %% */
SB_AppendChar (&R, '%');
SB_Skip (&Format);
continue;
}
if (SB_Peek (&Format) == '\0') {
InvalidFormatString ();
break;
}
/* Since a format specifier follows, we do expect anotehr argument for
* the .sprintf function.
*/
ConsumeComma ();
/* We will copy the format spec into F1 checking for the things we
* support, and later use xsprintf to do the actual formatting. This
* is easier than adding another printf implementation...
*/
SB_Clear (&F1);
SB_AppendChar (&F1, '%');
/* Check for flags */
Done = 0;
while ((C = SB_Peek (&Format)) != '\0' && !Done) {
switch (C) {
case '-': /* FALLTHROUGH */
case '+': /* FALLTHROUGH */
case ' ': /* FALLTHROUGH */
case '#': /* FALLTHROUGH */
case '0': SB_AppendChar (&F1, SB_Get (&Format)); break;
default: Done = 1; break;
}
}
/* We do only support a numerical width field */
while (IsDigit (SB_Peek (&Format))) {
SB_AppendChar (&F1, SB_Get (&Format));
}
/* Precision - only positive numerical fields supported */
if (SB_Peek (&Format) == '.') {
SB_AppendChar (&F1, SB_Get (&Format));
while (IsDigit (SB_Peek (&Format))) {
SB_AppendChar (&F1, SB_Get (&Format));
}
}
/* Length modifiers aren't supported, so read the conversion specs */
switch (SB_Peek (&Format)) {
case 'd':
case 'i':
case 'o':
case 'u':
case 'X':
case 'x':
/* Our ints are actually longs, so we use the 'l' modifier when
* calling xsprintf later. Terminate the format string.
*/
SB_AppendChar (&F1, 'l');
SB_AppendChar (&F1, SB_Get (&Format));
SB_Terminate (&F1);
/* The argument must be a constant expression */
IVal = ConstExpression ();
/* Format this argument according to the spec */
SB_Printf (&R1, SB_GetConstBuf (&F1), IVal);
/* Append the formatted argument to the result */
SB_Append (&R, &R1);
break;
case 's':
/* Add the format spec and terminate the format */
SB_AppendChar (&F1, SB_Get (&Format));
SB_Terminate (&F1);
/* The argument must be a string constant */
if (!LookAtStrCon ()) {
/* Make it one */
SB_CopyStr (&CurTok.SVal, "**undefined**");
}
/* Format this argument according to the spec */
SB_Printf (&R1, SB_GetConstBuf (&F1), SB_GetConstBuf (&CurTok.SVal));
/* Skip the string constant */
NextTok ();
/* Append the formatted argument to the result */
SB_Append (&R, &R1);
break;
case 'c':
/* Add the format spec and terminate the format */
SB_AppendChar (&F1, SB_Get (&Format));
SB_Terminate (&F1);
/* The argument must be a constant expression */
IVal = ConstExpression ();
/* Check for a valid character range */
if (IVal <= 0 || IVal > 255) {
Error ("Char argument out of range");
IVal = ' ';
}
/* Format this argument according to the spec. Be sure to pass
* an int as the char value.
*/
SB_Printf (&R1, SB_GetConstBuf (&F1), (int) IVal);
/* Append the formatted argument to the result */
SB_Append (&R, &R1);
break;
default:
Error ("Invalid format string");
SB_Skip (&Format);
break;
}
}
/* Terminate the result string */
SB_Terminate (&R);
/* We expect a closing parenthesis, but will not skip it but replace it
* by the string token just created.
*/
if (CurTok.Tok != TOK_RPAREN) {
Error ("`)' expected");
} else {
CurTok.Tok = TOK_STRCON;
SB_Copy (&CurTok.SVal, &R);
SB_Terminate (&CurTok.SVal);
}
/* Delete the string buffers */
SB_Done (&Format);
SB_Done (&R);
SB_Done (&F1);
SB_Done (&R1);
}
static void FuncIdent (void)
/* Handle the .IDENT function */
{
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
token_t Id;
unsigned I;
/* Skip it */
NextTok ();
/* Left paren expected */
ConsumeLParen ();
/* The function expects a string argument */
if (!LookAtStrCon ()) {
return;
}
/* Check that the string contains a valid identifier. While doing so,
* determine if it is a cheap local, or global one.
*/
SB_Reset (&CurTok.SVal);
/* Check for a cheap local symbol */
if (SB_Peek (&CurTok.SVal) == LocalStart) {
SB_Skip (&CurTok.SVal);
Id = TOK_LOCAL_IDENT;
} else {
Id = TOK_IDENT;
}
/* Next character must be a valid identifier start */
if (!IsIdStart (SB_Get (&CurTok.SVal))) {
NoIdent ();
return;
}
for (I = SB_GetIndex (&CurTok.SVal); I < SB_GetLen (&CurTok.SVal); ++I) {
if (!IsIdChar (SB_AtUnchecked (&CurTok.SVal, I))) {
NoIdent ();
return;
}
}
if (IgnoreCase) {
UpcaseSVal ();
}
/* If anything is ok, save and skip the string. Check that the next token
* is a right paren, then replace the token by an identifier token.
*/
SB_Copy (&Buf, &CurTok.SVal);
NextTok ();
if (CurTok.Tok != TOK_RPAREN) {
Error ("`)' expected");
} else {
CurTok.Tok = Id;
SB_Copy (&CurTok.SVal, &Buf);
SB_Terminate (&CurTok.SVal);
}
/* Free buffer memory */
SB_Done (&Buf);
}
