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expread.y
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expread.y
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/* Parse C expressions for GDB.
Copyright (C) 1986 Free Software Foundation, Inc.
GDB is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY. No author or distributor accepts responsibility to anyone
for the consequences of using it or for whether it serves any
particular purpose or works at all, unless he says so in writing.
Refer to the GDB General Public License for full details.
Everyone is granted permission to copy, modify and redistribute GDB,
but only under the conditions described in the GDB General Public
License. A copy of this license is supposed to have been given to you
along with GDB so you can know your rights and responsibilities. It
should be in a file named COPYING. Among other things, the copyright
notice and this notice must be preserved on all copies.
In other words, go ahead and share GDB, but don't try to stop
anyone else from sharing it farther. Help stamp out software hoarding!
*/
/* Parse a C expression from text in a string,
and return the result as a struct expression pointer.
That structure contains arithmetic operations in reverse polish,
with constants represented by operations that are followed by special data.
See expression.h for the details of the format.
What is important here is that it can be built up sequentially
during the process of parsing; the lower levels of the tree always
come first in the result. */
%{
#include "defs.h"
#include "param.h"
#include "symtab.h"
#include "frame.h"
#include "expression.h"
#include <stdio.h>
static struct expression *expout;
static int expout_size;
static int expout_ptr;
static int yylex ();
static void yyerror ();
static void write_exp_elt ();
static void write_exp_string ();
static void start_arglist ();
static int end_arglist ();
static void free_funcalls ();
static char *copy_name ();
/* If this is nonzero, this block is used as the lexical context
for symbol names. */
static struct block *expression_context_block;
/* The innermost context required by the stack and register variables
we've encountered so far. */
struct block *innermost_block;
/* The block in which the most recently discovered symbol was found. */
struct block *block_found;
/* Number of arguments seen so far in innermost function call. */
static int arglist_len;
/* Data structure for saving values of arglist_len
for function calls whose arguments contain other function calls. */
struct funcall
{
struct funcall *next;
int arglist_len;
};
struct funcall *funcall_chain;
/* This kind of datum is used to represent the name
of a symbol token. */
struct stoken
{
char *ptr;
int length;
};
%}
/* Although the yacc "value" of an expression is not used,
since the result is stored in the structure being created,
other node types do have values. */
%union
{
long lval;
double dval;
struct symbol *sym;
struct type *tval;
struct stoken sval;
int voidval;
struct block *bval;
enum exp_opcode opcode;
struct internalvar *ivar;
struct type **tvec;
int *ivec;
}
%type <voidval> exp exp1 start variable
%type <tval> type typebase
%type <tvec> nonempty_typelist
%type <bval> block
%token <lval> INT CHAR
%token <dval> FLOAT
/* Both NAME and TYPENAME tokens represent symbols in the input,
and both convey their data as strings.
But a TYPENAME is a string that happens to be defined as a typedef
or builtin type name (such as int or char)
and a NAME is any other symbol.
Contexts where this distinction is not important can use the
nonterminal "name", which matches either NAME or TYPENAME. */
%token <sval> NAME TYPENAME STRING
%type <sval> name
%token STRUCT UNION ENUM SIZEOF UNSIGNED COLONCOLON
%token <lval> LAST REGNAME
%token <ivar> VARIABLE
%token <opcode> ASSIGN_MODIFY
/* C++ */
%token THIS
%left ','
%left ABOVE_COMMA
%right '=' ASSIGN_MODIFY
%left OR
%left AND
%left '|'
%left '^'
%left '&'
%left EQUAL NOTEQUAL
%left '<' '>' LEQ GEQ
%left LSH RSH
%left '+' '-'
%left '*' '/' '%'
%left '@'
%right UNARY INCREMENT DECREMENT
%right ARROW '.' '['
%left COLONCOLON
%%
start : exp1
;
/* Expressions, including the comma operator. */
exp1 : exp
| exp1 ',' exp
{ write_exp_elt_opcode (BINOP_COMMA); }
;
/* Expressions, not including the comma operator. */
exp : '*' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_IND); }
exp : '&' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_ADDR); }
exp : '-' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_NEG); }
;
exp : '!' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_ZEROP); }
;
exp : '~' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_LOGNOT); }
;
exp : INCREMENT exp %prec UNARY
{ write_exp_elt_opcode (UNOP_PREINCREMENT); }
;
exp : DECREMENT exp %prec UNARY
{ write_exp_elt_opcode (UNOP_PREDECREMENT); }
;
exp : exp INCREMENT %prec UNARY
{ write_exp_elt_opcode (UNOP_POSTINCREMENT); }
;
exp : exp DECREMENT %prec UNARY
{ write_exp_elt_opcode (UNOP_POSTDECREMENT); }
;
exp : SIZEOF exp %prec UNARY
{ write_exp_elt_opcode (UNOP_SIZEOF); }
;
exp : exp ARROW name
{ write_exp_elt_opcode (STRUCTOP_PTR);
write_exp_string ($3);
write_exp_elt_opcode (STRUCTOP_PTR); }
;
exp : exp ARROW '*' exp
{ write_exp_elt_opcode (STRUCTOP_MPTR); }
;
exp : exp '.' name
{ write_exp_elt_opcode (STRUCTOP_STRUCT);
write_exp_string ($3);
write_exp_elt_opcode (STRUCTOP_STRUCT); }
;
exp : exp '.' '*' exp
{ write_exp_elt_opcode (STRUCTOP_MEMBER); }
;
exp : exp '[' exp1 ']'
{ write_exp_elt_opcode (BINOP_SUBSCRIPT); }
;
exp : exp '('
/* This is to save the value of arglist_len
being accumulated by an outer function call. */
{ start_arglist (); }
arglist ')'
{ write_exp_elt_opcode (OP_FUNCALL);
write_exp_elt_longcst (end_arglist ());
write_exp_elt_opcode (OP_FUNCALL); }
;
arglist :
;
arglist : exp
{ arglist_len = 1; }
;
arglist : arglist ',' exp %prec ABOVE_COMMA
{ arglist_len++; }
;
exp : '{' type '}' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_MEMVAL);
write_exp_elt_type ($2);
write_exp_elt_opcode (UNOP_MEMVAL); }
;
exp : '(' type ')' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_CAST);
write_exp_elt_type ($2);
write_exp_elt_opcode (UNOP_CAST); }
;
exp : '(' exp1 ')'
{ }
;
/* Binary operators in order of decreasing precedence. */
exp : exp '@' exp
{ write_exp_elt_opcode (BINOP_REPEAT); }
;
exp : exp '*' exp
{ write_exp_elt_opcode (BINOP_MUL); }
;
exp : exp '/' exp
{ write_exp_elt_opcode (BINOP_DIV); }
;
exp : exp '%' exp
{ write_exp_elt_opcode (BINOP_REM); }
;
exp : exp '+' exp
{ write_exp_elt_opcode (BINOP_ADD); }
;
exp : exp '-' exp
{ write_exp_elt_opcode (BINOP_SUB); }
;
exp : exp LSH exp
{ write_exp_elt_opcode (BINOP_LSH); }
;
exp : exp RSH exp
{ write_exp_elt_opcode (BINOP_RSH); }
;
exp : exp EQUAL exp
{ write_exp_elt_opcode (BINOP_EQUAL); }
;
exp : exp NOTEQUAL exp
{ write_exp_elt_opcode (BINOP_NOTEQUAL); }
;
exp : exp LEQ exp
{ write_exp_elt_opcode (BINOP_LEQ); }
;
exp : exp GEQ exp
{ write_exp_elt_opcode (BINOP_GEQ); }
;
exp : exp '<' exp
{ write_exp_elt_opcode (BINOP_LESS); }
;
exp : exp '>' exp
{ write_exp_elt_opcode (BINOP_GTR); }
;
exp : exp '&' exp
{ write_exp_elt_opcode (BINOP_LOGAND); }
;
exp : exp '^' exp
{ write_exp_elt_opcode (BINOP_LOGXOR); }
;
exp : exp '|' exp
{ write_exp_elt_opcode (BINOP_LOGIOR); }
;
exp : exp AND exp
{ write_exp_elt_opcode (BINOP_AND); }
;
exp : exp OR exp
{ write_exp_elt_opcode (BINOP_OR); }
;
exp : exp '?' exp ':' exp
{ write_exp_elt_opcode (TERNOP_COND); }
;
exp : exp '=' exp
{ write_exp_elt_opcode (BINOP_ASSIGN); }
;
exp : exp ASSIGN_MODIFY exp
{ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
write_exp_elt_opcode ($2);
write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
;
exp : INT
{ write_exp_elt_opcode (OP_LONG);
write_exp_elt_type (builtin_type_long);
write_exp_elt_longcst ($1);
write_exp_elt_opcode (OP_LONG); }
;
exp : CHAR
{ write_exp_elt_opcode (OP_LONG);
write_exp_elt_type (builtin_type_char);
write_exp_elt_longcst ($1);
write_exp_elt_opcode (OP_LONG); }
;
exp : FLOAT
{ write_exp_elt_opcode (OP_DOUBLE);
write_exp_elt_type (builtin_type_double);
write_exp_elt_dblcst ($1);
write_exp_elt_opcode (OP_DOUBLE); }
;
exp : variable
;
exp : LAST
{ write_exp_elt_opcode (OP_LAST);
write_exp_elt_longcst ($1);
write_exp_elt_opcode (OP_LAST); }
;
exp : REGNAME
{ write_exp_elt_opcode (OP_REGISTER);
write_exp_elt_longcst ($1);
write_exp_elt_opcode (OP_REGISTER); }
;
exp : VARIABLE
{ write_exp_elt_opcode (OP_INTERNALVAR);
write_exp_elt_intern ($1);
write_exp_elt_opcode (OP_INTERNALVAR); }
;
exp : SIZEOF '(' type ')'
{ write_exp_elt_opcode (OP_LONG);
write_exp_elt_type (builtin_type_int);
write_exp_elt_longcst ((long) TYPE_LENGTH ($3));
write_exp_elt_opcode (OP_LONG); }
;
exp : STRING
{ write_exp_elt_opcode (OP_STRING);
write_exp_string ($1);
write_exp_elt_opcode (OP_STRING); }
;
/* C++. */
exp : THIS
{ write_exp_elt_opcode (OP_THIS);
write_exp_elt_opcode (OP_THIS); }
;
/* end of C++. */
block : name
{
struct symtab *tem = lookup_symtab (copy_name ($1));
struct symbol *sym;
if (tem)
$$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem), 1);
else
{
sym = lookup_symbol (copy_name ($1),
expression_context_block,
VAR_NAMESPACE, 0);
if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
$$ = SYMBOL_BLOCK_VALUE (sym);
else
error ("No file or function \"%s\".",
copy_name ($1));
}
}
;
block : block COLONCOLON name
{ struct symbol *tem
= lookup_symbol (copy_name ($3), $1, VAR_NAMESPACE, 0);
if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
error ("No function \"%s\" in specified context.",
copy_name ($3));
$$ = SYMBOL_BLOCK_VALUE (tem); }
;
variable: block COLONCOLON name
{ struct symbol *sym;
sym = lookup_symbol (copy_name ($3), $1, VAR_NAMESPACE, 0);
if (sym == 0)
error ("No symbol \"%s\" in specified context.",
copy_name ($3));
write_exp_elt_opcode (OP_VAR_VALUE);
write_exp_elt_sym (sym);
write_exp_elt_opcode (OP_VAR_VALUE); }
;
variable: typebase COLONCOLON name
{
struct type *type = $1;
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
&& TYPE_CODE (type) != TYPE_CODE_UNION)
error ("`%s' is not defined as an aggregate type.",
TYPE_NAME (type));
write_exp_elt_opcode (OP_SCOPE);
write_exp_elt_type (type);
write_exp_string ($3);
write_exp_elt_opcode (OP_SCOPE);
}
| COLONCOLON name
{
char *name = copy_name ($2);
struct symbol *sym;
int i;
sym = lookup_symbol (name, 0, VAR_NAMESPACE, 0);
if (sym)
{
write_exp_elt_opcode (OP_VAR_VALUE);
write_exp_elt_sym (sym);
write_exp_elt_opcode (OP_VAR_VALUE);
break;
}
for (i = 0; i < misc_function_count; i++)
if (!strcmp (misc_function_vector[i].name, name))
break;
if (i < misc_function_count)
{
write_exp_elt_opcode (OP_LONG);
write_exp_elt_type (builtin_type_int);
write_exp_elt_longcst (misc_function_vector[i].address);
write_exp_elt_opcode (OP_LONG);
write_exp_elt_opcode (UNOP_MEMVAL);
write_exp_elt_type (builtin_type_char);
write_exp_elt_opcode (UNOP_MEMVAL);
}
else
if (symtab_list == 0
&& partial_symtab_list == 0)
error ("No symbol table is loaded. Use the \"symbol-file\" command.");
else
error ("No symbol \"%s\" in current context.", name);
}
;
variable: NAME
{ struct symbol *sym;
int is_a_field_of_this;
sym = lookup_symbol (copy_name ($1),
expression_context_block,
VAR_NAMESPACE,
&is_a_field_of_this);
if (sym)
{
switch (sym->class)
{
case LOC_REGISTER:
case LOC_ARG:
case LOC_LOCAL:
if (innermost_block == 0 ||
contained_in (block_found,
innermost_block))
innermost_block = block_found;
}
write_exp_elt_opcode (OP_VAR_VALUE);
write_exp_elt_sym (sym);
write_exp_elt_opcode (OP_VAR_VALUE);
}
else if (is_a_field_of_this)
{
/* C++: it hangs off of `this'. Must
not inadvertently convert from a method call
to data ref. */
if (innermost_block == 0 ||
contained_in (block_found, innermost_block))
innermost_block = block_found;
write_exp_elt_opcode (OP_THIS);
write_exp_elt_opcode (OP_THIS);
write_exp_elt_opcode (STRUCTOP_PTR);
write_exp_string ($1);
write_exp_elt_opcode (STRUCTOP_PTR);
}
else
{
register int i;
register char *arg = copy_name ($1);
for (i = 0; i < misc_function_count; i++)
if (!strcmp (misc_function_vector[i].name, arg))
break;
if (i < misc_function_count)
{
write_exp_elt_opcode (OP_LONG);
write_exp_elt_type (builtin_type_int);
write_exp_elt_longcst (misc_function_vector[i].address);
write_exp_elt_opcode (OP_LONG);
write_exp_elt_opcode (UNOP_MEMVAL);
write_exp_elt_type (builtin_type_char);
write_exp_elt_opcode (UNOP_MEMVAL);
}
else if (symtab_list == 0
&& partial_symtab_list == 0)
error ("No symbol table is loaded. Use the \"symbol-file\" command.");
else
error ("No symbol \"%s\" in current context.",
copy_name ($1));
}
}
;
type : typebase
| type '*'
{ $$ = lookup_pointer_type ($1); }
| type '&'
{ $$ = lookup_reference_type ($1); }
| typebase COLONCOLON '*'
{ $$ = lookup_member_type (builtin_type_int, $1); }
| type '(' typebase COLONCOLON '*' ')'
{ $$ = lookup_member_type ($1, $3); }
| type '(' typebase COLONCOLON '*' ')' '(' ')'
{ $$ = lookup_member_type (lookup_function_type ($1)); }
| type '(' typebase COLONCOLON '*' ')' '(' nonempty_typelist ')'
{ $$ = lookup_member_type (lookup_function_type ($1));
free ($8); }
;
typebase
: TYPENAME
{ $$ = lookup_typename (copy_name ($1),
expression_context_block, 0); }
| STRUCT name
{ $$ = lookup_struct (copy_name ($2),
expression_context_block); }
| UNION name
{ $$ = lookup_union (copy_name ($2),
expression_context_block); }
| ENUM name
{ $$ = lookup_enum (copy_name ($2),
expression_context_block); }
| UNSIGNED name
{ $$ = lookup_unsigned_typename (copy_name ($2)); }
;
nonempty_typelist
: type
{ $$ = (struct type **)xmalloc (sizeof (struct type *) * 2);
$$[0] = (struct type *)0;
$$[1] = $1;
}
| nonempty_typelist ',' type
{ int len = sizeof (struct type *) * ++($<ivec>1[0]);
$$ = (struct type **)xrealloc ($1, len);
$$[$<ivec>$[0]] = $3;
}
;
name : NAME
| TYPENAME
;
%%
/* Begin counting arguments for a function call,
saving the data about any containing call. */
static void
start_arglist ()
{
register struct funcall *new = (struct funcall *) xmalloc (sizeof (struct funcall));
new->next = funcall_chain;
new->arglist_len = arglist_len;
arglist_len = 0;
funcall_chain = new;
}
/* Return the number of arguments in a function call just terminated,
and restore the data for the containing function call. */
static int
end_arglist ()
{
register int val = arglist_len;
register struct funcall *call = funcall_chain;
funcall_chain = call->next;
arglist_len = call->arglist_len;
free (call);
return val;
}
/* Free everything in the funcall chain.
Used when there is an error inside parsing. */
static void
free_funcalls ()
{
register struct funcall *call, *next;
for (call = funcall_chain; call; call = next)
{
next = call->next;
free (call);
}
}
/* This page contains the functions for adding data to the struct expression
being constructed. */
/* Add one element to the end of the expression. */
/* To avoid a bug in the Sun 4 compiler, we pass things that can fit into
a register through here */
static void
write_exp_elt (expelt)
union exp_element expelt;
{
if (expout_ptr >= expout_size)
{
expout_size *= 2;
expout = (struct expression *) xrealloc (expout,
sizeof (struct expression)
+ expout_size * sizeof (union exp_element));
}
expout->elts[expout_ptr++] = expelt;
}
static void
write_exp_elt_opcode (expelt)
enum exp_opcode expelt;
{
union exp_element tmp;
tmp.opcode = expelt;
write_exp_elt (tmp);
}
static void
write_exp_elt_sym (expelt)
struct symbol *expelt;
{
union exp_element tmp;
tmp.symbol = expelt;
write_exp_elt (tmp);
}
static void
write_exp_elt_longcst (expelt)
LONGEST expelt;
{
union exp_element tmp;
tmp.longconst = expelt;
write_exp_elt (tmp);
}
static void
write_exp_elt_dblcst (expelt)
double expelt;
{
union exp_element tmp;
tmp.doubleconst = expelt;
write_exp_elt (tmp);
}
static void
write_exp_elt_type (expelt)
struct type *expelt;
{
union exp_element tmp;
tmp.type = expelt;
write_exp_elt (tmp);
}
static void
write_exp_elt_intern (expelt)
struct internalvar *expelt;
{
union exp_element tmp;
tmp.internalvar = expelt;
write_exp_elt (tmp);
}
/* Add a string constant to the end of the expression.
Follow it by its length in bytes, as a separate exp_element. */
static void
write_exp_string (str)
struct stoken str;
{
register int len = str.length;
register int lenelt
= (len + sizeof (union exp_element)) / sizeof (union exp_element);
expout_ptr += lenelt;
if (expout_ptr >= expout_size)
{
expout_size = max (expout_size * 2, expout_ptr + 10);
expout = (struct expression *)
xrealloc (expout, (sizeof (struct expression)
+ (expout_size * sizeof (union exp_element))));
}
bcopy (str.ptr, (char *) &expout->elts[expout_ptr - lenelt], len);
((char *) &expout->elts[expout_ptr - lenelt])[len] = 0;
write_exp_elt_longcst (len);
}
/* During parsing of a C expression, the pointer to the next character
is in this variable. */
static char *lexptr;
/* Tokens that refer to names do so with explicit pointer and length,
so they can share the storage that lexptr is parsing.
When it is necessary to pass a name to a function that expects
a null-terminated string, the substring is copied out
into a block of storage that namecopy points to.
namecopy is allocated once, guaranteed big enough, for each parsing. */
static char *namecopy;
/* Current depth in parentheses within the expression. */
static int paren_depth;
/* Nonzero means stop parsing on first comma (if not within parentheses). */
static int comma_terminates;
/* Take care of parsing a number (anything that starts with a digit).
Set yylval and return the token type; update lexptr.
LEN is the number of characters in it. */
/*** Needs some error checking for the float case ***/
static int
parse_number (olen)
int olen;
{
register char *p = lexptr;
register long n = 0;
register int c;
register int base = 10;
register int len = olen;
char *err_copy;
extern double atof ();
for (c = 0; c < len; c++)
if (p[c] == '.')
{
/* It's a float since it contains a point. */
yylval.dval = atof (p);
lexptr += len;
return FLOAT;
}
if (len >= 3 && (!strncmp (p, "0x", 2) || !strncmp (p, "0X", 2)))
{
p += 2;
base = 16;
len -= 2;
}
else if (*p == '0')
base = 8;
while (len-- > 0)
{
c = *p++;
if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
if (c != 'l')
n *= base;
if (c >= '0' && c <= '9')
n += c - '0';
else
{
if (base == 16 && c >= 'a' && c <= 'f')
n += c - 'a' + 10;
else if (len == 0 && c == 'l')
;
else
{
err_copy = (char *) alloca (olen + 1);
bcopy (lexptr, err_copy, olen);
err_copy[olen] = 0;
error ("Invalid number \"%s\".", err_copy);
}
}
}
lexptr = p;
yylval.lval = n;
return INT;
}
struct token
{
char *operator;
int token;
enum exp_opcode opcode;
};
static struct token tokentab3[] =
{
{">>=", ASSIGN_MODIFY, BINOP_RSH},
{"<<=", ASSIGN_MODIFY, BINOP_LSH}
};
static struct token tokentab2[] =
{
{"+=", ASSIGN_MODIFY, BINOP_ADD},
{"-=", ASSIGN_MODIFY, BINOP_SUB},
{"*=", ASSIGN_MODIFY, BINOP_MUL},
{"/=", ASSIGN_MODIFY, BINOP_DIV},
{"%=", ASSIGN_MODIFY, BINOP_REM},
{"|=", ASSIGN_MODIFY, BINOP_LOGIOR},
{"&=", ASSIGN_MODIFY, BINOP_LOGAND},
{"^=", ASSIGN_MODIFY, BINOP_LOGXOR},
{"++", INCREMENT, BINOP_END},
{"--", DECREMENT, BINOP_END},
{"->", ARROW, BINOP_END},
{"&&", AND, BINOP_END},
{"||", OR, BINOP_END},
{"::", COLONCOLON, BINOP_END},
{"<<", LSH, BINOP_END},
{">>", RSH, BINOP_END},
{"==", EQUAL, BINOP_END},
{"!=", NOTEQUAL, BINOP_END},
{"<=", LEQ, BINOP_END},
{">=", GEQ, BINOP_END}
};
/* assign machine-independent names to certain registers
* (unless overridden by the REGISTER_NAMES table)
*/
struct std_regs {
char *name;
int regnum;
} std_regs[] = {
#ifdef PC_REGNUM
{ "pc", PC_REGNUM },
#endif
#ifdef FP_REGNUM
{ "fp", FP_REGNUM },
#endif
#ifdef SP_REGNUM
{ "sp", SP_REGNUM },
#endif
#ifdef PS_REGNUM
{ "ps", PS_REGNUM },
#endif
};
#define NUM_STD_REGS (sizeof std_regs / sizeof std_regs[0])
/* Read one token, getting characters through lexptr. */
static int
yylex ()
{
register int c;
register int namelen;
register int i;
register char *tokstart;
retry:
tokstart = lexptr;
/* See if it is a special token of length 3. */
for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
if (!strncmp (tokstart, tokentab3[i].operator, 3))
{
lexptr += 3;
yylval.opcode = tokentab3[i].opcode;
return tokentab3[i].token;
}
/* See if it is a special token of length 2. */
for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
if (!strncmp (tokstart, tokentab2[i].operator, 2))
{
lexptr += 2;
yylval.opcode = tokentab2[i].opcode;
return tokentab2[i].token;
}
switch (c = *tokstart)
{
case 0:
return 0;
case ' ':
case '\t':
case '\n':
lexptr++;
goto retry;
case '\'':
lexptr++;
c = *lexptr++;
if (c == '\\')
c = parse_escape (&lexptr);
yylval.lval = c;
c = *lexptr++;
if (c != '\'')
error ("Invalid character constant.");
return CHAR;
case '(':
paren_depth++;
lexptr++;
return c;
case ')':
if (paren_depth == 0)
return 0;
paren_depth--;
lexptr++;