TextAsmScanner Class Reference

This class implements the VM plaintext assembly scanner. More...

#include <tasm-scanner.h>

Inheritance diagram for TextAsmScanner:

[legend]Collaboration diagram for TextAsmScanner:

[legend]List of all members.

Public Types
enum	TokID {   T_EOF = 0, T_pop = 258, T_symbols, T_locations,   T_program, T_info, TS_namespace, TS_class,   TS_base, TS_baseent, TS_varent, TS_size,   TS_virtual, TS_vtable, TS_symref, TS_vglobal,   TS_pglobal, TS_symbols, TS_funcsym, TS_varsym,   TS_globvar, TP_slabel, TP_mlabel, TP_rlabel,   TI_abivers }
Public Member Functions
	TextAsmScanner ()
	Construct text assembly scanner.
	~TextAsmScanner ()
	Destroy text assembly scanner and all (allocated and zombie) tokens.
int	NErrors () const
	Get the number of lexer errors.
VM::InstructionStorage *	InsnStorage ()
	Used to get insn_storage.
Static Public Member Functions
const char *	TokID2String (TokID t)
	Return string representation of token ID.
Public Attributes
VM::ProgramStorage::Function *	insn_storage
Private Member Functions
void	reset ()
	Scanner reset [overriding virtual].
TokenEntry *	AllocTokenEntry ()
	Important: Override token entry allocation routine.
char *	_ParseNameStr (const char *str, const char *end)
	Parse name string.
template<typename T> const char *	_ParseInt (T *ret, const char *str, char prefix='\0')
	Overloaded integer parsing function.
template<typename T> const char *	_ParseInt0 (T *ret, const char *str)
	Special version which will return 0 if value is not present.
template<typename T> const char *	_ParseFloat (T *ret, const char *str)
	Overloaded float parsing function.
const char *	_ParseTypeSpec (Token::Type *ts, const char *str)
	Parse type spec.
void	_CheckInstAllowed_Failed ()
	Internally used by _CheckInstAllowed().
bool	_CheckInstAllowed ()
	Check if an instruction may be specified now. Returns 0 if not.
	TextAsmScanner (const TextAsmScanner &)
	Do not use.
void	operator= (const TextAsmScanner &)
	Do not use.
Friends
int	TASM_lex (void *)

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Detailed Description

This class implements the VM plaintext assembly scanner.

Author:

Wolfgang Wieser ] wwieser (a) gmx <*> de [

Note the use of the TASM_ prefix for the base class from scannerbase.h.

NOTE: This class is not in a namespace as it makes big trouble to put a flex lexer into a namespace.

Definition at line 50 of file tasm-scanner.h.

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Member Enumeration Documentation

enum TextAsmScanner::TokID

This are the token identifiers. Do not forget to keep _TokID2String() in sync. Enumeration values: T_EOF  end of input (must be 0) T_pop  read ";"; pop state T_symbols  symbol / object desc T_locations  location description T_program  program instruction section T_info  info section TS_namespace  str_val: NAME TS_class  str_val: NAME TS_base  TS_baseent  TS_varent  [str_val: NAME] TS_size  TS_virtual  TS_vtable  vtable block begin TS_symref  vtable block entry TS_vglobal  (Token info: none) TS_pglobal  (Token info: none) TS_symbols  number of symbol entries (TS_*sym) TS_funcsym  str_val: fname; function symbol TS_varsym  str_val: NAME; variable symbol TS_globvar  (Token info: none); global block entry TP_slabel  str_val: NAME; string label TP_mlabel  codemark label TP_rlabel  symref label (start of function) TI_abivers  ABI version (str_val). Definition at line 56 of file tasm-scanner.h.

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Constructor & Destructor Documentation

TextAsmScanner::TextAsmScanner (  const TextAsmScanner &   )  [private]

Do not use.

TextAsmScanner::TextAsmScanner (   )

Construct text assembly scanner.

TextAsmScanner::~TextAsmScanner (   )

Destroy text assembly scanner and all (allocated and zombie) tokens.

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Member Function Documentation

bool TextAsmScanner::_CheckInstAllowed (   )  [inline, private]

Check if an instruction may be specified now. Returns 0 if not. Definition at line 211 of file tasm-scanner.h. References _CheckInstAllowed_Failed(), and insn_storage.

void TextAsmScanner::_CheckInstAllowed_Failed (   )  [private]

Internally used by _CheckInstAllowed(). Referenced by _CheckInstAllowed().

template<typename T> const char* TextAsmScanner::_ParseFloat (  T *  ret, const char *  str )  [private]

Overloaded float parsing function. For internal use only. Same as _ParseInt() but for floats and without prefix skipping.

template<typename T> const char* TextAsmScanner::_ParseInt (  T *  ret, const char *  str, char  prefix = '\0' )  [private]

Overloaded integer parsing function. For internal use only. Parse integer by first skipping any number of whitespace before the integer. Additionally, the specified prefix (if not '\0') must be present before the ineger value. Input string (str) is NUL-terminated. The parsed integer is stored in *ret. Returns where the parsed integer string ended (i.e. where to resume parsing).

template<typename T> const char* TextAsmScanner::_ParseInt0 (  T *  ret, const char *  str )  [private]

Special version which will return 0 if value is not present.

char* TextAsmScanner::_ParseNameStr (  const char *  str, const char *  end )  [private]

Parse name string. For internal use only. Parse name string by first skipping any number of whitespace before the name. If end=NULL, the input string (str) must be NUL-terminated and strlen() is asked for the length. If end is non-NULL, it points to the end of the string; in this case the string does not have to be NUL-terminated and will be trimmed to size end-str. Returns: ALLOC<>ated name string. (Token::~Token() and Token::clear() are responsible for FREEing).

const char* TextAsmScanner::_ParseTypeSpec (  Token::Type *  ts, const char *  str )  [private]

Parse type spec. For internal use only. Parse type spec in the form type ::= "b" | "s" | "i" | "l" | "f" | "d" | | "p" [">" TYPEID] | "a" ( "b" | "s" | "i" | "l" | "f" | "d" | "p" ) . (FIXME: Do we need "p>TYPEID"??) Parsed type spec is stored in *ts. Returns: Where to go on parsing.

TokenEntry* TextAsmScanner::AllocTokenEntry (   )  [inline, private]

Important: Override token entry allocation routine. Definition at line 146 of file tasm-scanner.h.

VM::InstructionStorage* TextAsmScanner::InsnStorage (   )  [inline]

Used to get insn_storage. Definition at line 237 of file tasm-scanner.h. References insn_storage.

int TextAsmScanner::NErrors (   )  const [inline]

Get the number of lexer errors. Definition at line 228 of file tasm-scanner.h. Referenced by VM::AssemblerFile_Plaintext::ParseFile().

void TextAsmScanner::operator= (  const TextAsmScanner &   )  [private]

Do not use.

void TextAsmScanner::reset (   )  [private]

Scanner reset [overriding virtual].

const char* TextAsmScanner::TokID2String (  TokID  t  )  [static]

Return string representation of token ID. Referenced by VM::AssemblerFile_Plaintext::_AlreadySetError(), and VM::AssemblerFile_Plaintext::_ExpectError().

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Friends And Related Function Documentation

int TASM_lex (  void *   )  [friend]

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Member Data Documentation

VM::ProgramStorage::Function* TextAsmScanner::insn_storage

This InstructionStorage-derived object is used to append all instructions as they come. If NULL, instructions in input will generate an error. Definition at line 234 of file tasm-scanner.h. Referenced by _CheckInstAllowed(), VM::AssemblerFile_Plaintext::_ParseProgram_FinishFunction(), VM::AssemblerFile_Plaintext::_ParseProgram_Label(), and InsnStorage().

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The documentation for this class was generated from the following file:

• /ray/src/vm/input/tasm/tasm-scanner.h

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