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98f2caaa5f3ce78bded282bdd76b9b09019231fc
bison/src/scan-gram.l
Paul Eggert 98f2caaa5f Use more accurate diagnostics, e.g. 
"integer out of range" rather than "invalid value".
2002-11-06 07:01:06 +00:00

924 lines
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/* Bison Grammar Scanner -*- C -*-
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
*/
%option debug nodefault noyywrap nounput never-interactive stack
%option prefix="gram_" outfile="lex.yy.c"
%{
#include "system.h"
#include "mbswidth.h"
#include "complain.h"
#include "quote.h"
#include "getargs.h"
#include "gram.h"
#include "reader.h"
/* Each time we match a string, move the end cursor to its end. */
#define YY_USER_INIT \
do { \
LOCATION_RESET (*yylloc); \
yylloc->file = infile; \
/* This is only to avoid GCC warnings. */ \
if (yycontrol) {;}; \
} while (0)
#define YY_USER_ACTION extend_location (yylloc, yytext, yyleng);
#define YY_STEP LOCATION_STEP (*yylloc)
#define YY_INPUT(buf, result, size) ((result) = no_cr_read (yyin, buf, size))
/* Read bytes from FP into buffer BUF of size SIZE. Return the
number of bytes read. Remove '\r' from input, treating \r\n
and isolated \r as \n. */
static size_t
no_cr_read (FILE *fp, char *buf, size_t size)
{
size_t s = fread (buf, 1, size, fp);
if (s)
{
char *w = memchr (buf, '\r', s);
if (w)
{
char const *r = ++w;
char const *lim = buf + s;
for (;;)
{
/* Found an '\r'. Treat it like '\n', but ignore any
'\n' that immediately follows. */
w[-1] = '\n';
if (r == lim)
{
int ch = getc (fp);
if (ch != '\n' && ungetc (ch, fp) != ch)
break;
}
else if (*r == '\n')
r++;
/* Copy until the next '\r'. */
do
{
if (r == lim)
return w - buf;
}
while ((*w++ = *r++) != '\r');
}
return w - buf;
}
}
return s;
}
/* Extend *LOC to account for token TOKEN of size SIZE. */
static void
extend_location (location_t *loc, char const *token, int size)
{
int line = loc->last_line;
int column = loc->last_column;
char const *p0 = token;
char const *p = token;
char const *lim = token + size;
for (p = token; p < lim; p++)
switch (*p)
{
case '\r':
/* \r shouldn't survive no_cr_read. */
abort ();
case '\n':
line++;
column = 1;
p0 = p + 1;
break;
case '\t':
column += mbsnwidth (p0, p - p0, 0);
column += 8 - ((column - 1) & 7);
p0 = p + 1;
break;
}
loc->last_line = line;
loc->last_column = column + mbsnwidth (p0, p - p0, 0);
}
/* STRING_OBSTACK -- Used to store all the characters that we need to
keep (to construct ID, STRINGS etc.). Use the following macros to
use it.
Use YY_OBS_GROW to append what has just been matched, and
YY_OBS_FINISH to end the string (it puts the ending 0).
YY_OBS_FINISH also stores this string in LAST_STRING, which can be
used, and which is used by YY_OBS_FREE to free the last string. */
static struct obstack string_obstack;
char *last_string;
#define YY_OBS_GROW \
obstack_grow (&string_obstack, yytext, yyleng)
#define YY_OBS_FINISH \
do { \
obstack_1grow (&string_obstack, '\0'); \
last_string = obstack_finish (&string_obstack); \
} while (0)
#define YY_OBS_FREE \
do { \
obstack_free (&string_obstack, last_string); \
} while (0)
void
scanner_last_string_free (void)
{
YY_OBS_FREE;
}
static int percent_percent_count = 0;
/* Within well-formed rules, RULE_LENGTH is the number of values in
the current rule so far, which says where to find `$0' with respect
to the top of the stack. It is not the same as the rule->length in
the case of mid rule actions.
Outside of well-formed rules, RULE_LENGTH has an undefined value. */
static int rule_length;
static void handle_dollar (braced_code_t code_kind,
char *cp, location_t location);
static void handle_at (braced_code_t code_kind,
char *cp, location_t location);
static int convert_ucn_to_byte (char const *hex_text);
%}
%x SC_COMMENT SC_LINE_COMMENT SC_YACC_COMMENT
%x SC_STRING SC_CHARACTER
%x SC_ESCAPED_STRING SC_ESCAPED_CHARACTER
%x SC_BRACED_CODE SC_PROLOGUE SC_EPILOGUE
letter [.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
id {letter}({letter}|[0-9])*
directive %{letter}({letter}|[0-9]|-)*
int [0-9]+
/* POSIX says that a tag must be both an id and a C union member, but
historically almost any character is allowed in a tag. We disallow
NUL and newline, as this simplifies our implementation. */
tag [^\0\n>]+
/* Zero or more instances of backslash-newline. Following GCC, allow
white space between the backslash and the newline. */
splice (\\[ \f\t\v]*\n)*
%%
%{
int braces_level IF_LINT (= 0);
/* At each yylex invocation, mark the current position as the
start of the next token. */
YY_STEP;
%}
/*----------------------------.
| Scanning Bison directives. |
`----------------------------*/
<INITIAL>
{
"%binary" return PERCENT_NONASSOC;
"%debug" return PERCENT_DEBUG;
"%define" return PERCENT_DEFINE;
"%defines" return PERCENT_DEFINES;
"%destructor" return PERCENT_DESTRUCTOR;
"%dprec" return PERCENT_DPREC;
"%error"[-_]"verbose" return PERCENT_ERROR_VERBOSE;
"%expect" return PERCENT_EXPECT;
"%file-prefix" return PERCENT_FILE_PREFIX;
"%fixed"[-_]"output"[-_]"files" return PERCENT_YACC;
"%glr-parser" return PERCENT_GLR_PARSER;
"%left" return PERCENT_LEFT;
"%locations" return PERCENT_LOCATIONS;
"%merge" return PERCENT_MERGE;
"%name"[-_]"prefix" return PERCENT_NAME_PREFIX;
"%no"[-_]"lines" return PERCENT_NO_LINES;
"%nonassoc" return PERCENT_NONASSOC;
"%nterm" return PERCENT_NTERM;
"%output" return PERCENT_OUTPUT;
"%parse-param" return PERCENT_PARSE_PARAM;
"%prec" rule_length--; return PERCENT_PREC;
"%printer" return PERCENT_PRINTER;
"%pure"[-_]"parser" return PERCENT_PURE_PARSER;
"%right" return PERCENT_RIGHT;
"%lex-param" return PERCENT_LEX_PARAM;
"%skeleton" return PERCENT_SKELETON;
"%start" return PERCENT_START;
"%term" return PERCENT_TOKEN;
"%token" return PERCENT_TOKEN;
"%token"[-_]"table" return PERCENT_TOKEN_TABLE;
"%type" return PERCENT_TYPE;
"%union" return PERCENT_UNION;
"%verbose" return PERCENT_VERBOSE;
"%yacc" return PERCENT_YACC;
{directive} {
complain_at (*yylloc, _("invalid directive: %s"), quote (yytext));
YY_STEP;
}
"=" return EQUAL;
":" rule_length = 0; return COLON;
"|" rule_length = 0; return PIPE;
"," return COMMA;
";" return SEMICOLON;
[ \f\n\t\v]+ YY_STEP;
{id} {
yylval->symbol = symbol_get (yytext, *yylloc);
rule_length++;
return ID;
}
{int} {
unsigned long num;
errno = 0;
num = strtoul (yytext, 0, 10);
if (INT_MAX < num || errno)
{
complain_at (*yylloc, _("integer out of range: %s"), quote (yytext));
num = INT_MAX;
}
yylval->integer = num;
return INT;
}
/* Characters. We don't check there is only one. */
"'" YY_OBS_GROW; yy_push_state (SC_ESCAPED_CHARACTER);
/* Strings. */
"\"" YY_OBS_GROW; yy_push_state (SC_ESCAPED_STRING);
/* Comments. */
"/*" BEGIN SC_YACC_COMMENT;
"//".* YY_STEP;
/* Prologue. */
"%{" yy_push_state (SC_PROLOGUE);
/* Code in between braces. */
"{" YY_OBS_GROW; braces_level = 0; yy_push_state (SC_BRACED_CODE);
/* A type. */
"<"{tag}">" {
obstack_grow (&string_obstack, yytext + 1, yyleng - 2);
YY_OBS_FINISH;
yylval->string = last_string;
return TYPE;
}
"%%" {
if (++percent_percent_count == 2)
yy_push_state (SC_EPILOGUE);
return PERCENT_PERCENT;
}
. {
complain_at (*yylloc, _("invalid character: %s"), quote (yytext));
YY_STEP;
}
}
/*-------------------------------------------------------------------.
| Whatever the start condition (but those which correspond to |
| entities `swallowed' by Bison: SC_YACC_COMMENT, SC_ESCAPED_STRING, |
| and SC_ESCAPED_CHARACTER), no M4 character must escape as is. |
`-------------------------------------------------------------------*/
<SC_COMMENT,SC_LINE_COMMENT,SC_STRING,SC_CHARACTER,SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE>
{
\[ obstack_sgrow (&string_obstack, "@<:@");
\] obstack_sgrow (&string_obstack, "@:>@");
}
/*---------------------------------------------------------------.
| Scanning a Yacc comment. The initial `/ *' is already eaten. |
`---------------------------------------------------------------*/
<SC_YACC_COMMENT>
{
"*/" {
YY_STEP;
BEGIN INITIAL;
}
[^*]+|"*" ;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in a comment"));
BEGIN INITIAL;
}
}
/*------------------------------------------------------------.
| Scanning a C comment. The initial `/ *' is already eaten. |
`------------------------------------------------------------*/
<SC_COMMENT>
{
"*"{splice}"/" YY_OBS_GROW; yy_pop_state ();
[^*\[\]]+|"*" YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in a comment"));
yy_pop_state ();
}
}
/*--------------------------------------------------------------.
| Scanning a line comment. The initial `//' is already eaten. |
`--------------------------------------------------------------*/
<SC_LINE_COMMENT>
{
"\n" YY_OBS_GROW; yy_pop_state ();
([^\n\[\]]|{splice})+ YY_OBS_GROW;
<<EOF>> yy_pop_state ();
}
/*----------------------------------------------------------------.
| Scanning a C string, including its escapes. The initial `"' is |
| already eaten. |
`----------------------------------------------------------------*/
<SC_ESCAPED_STRING>
{
"\"" {
assert (yy_top_state () == INITIAL);
YY_OBS_GROW;
YY_OBS_FINISH;
yylval->string = last_string;
yy_pop_state ();
rule_length++;
return STRING;
}
[^\"\\]+ YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in a string"));
assert (yy_top_state () == INITIAL);
YY_OBS_FINISH;
yylval->string = last_string;
yy_pop_state ();
return STRING;
}
}
/*---------------------------------------------------------------.
| Scanning a C character, decoding its escapes. The initial "'" |
| is already eaten. |
`---------------------------------------------------------------*/
<SC_ESCAPED_CHARACTER>
{
"'" {
YY_OBS_GROW;
assert (yy_top_state () == INITIAL);
{
YY_OBS_FINISH;
yylval->symbol = symbol_get (last_string, *yylloc);
symbol_class_set (yylval->symbol, token_sym, *yylloc);
symbol_user_token_number_set (yylval->symbol,
(unsigned char) last_string[1], *yylloc);
YY_OBS_FREE;
yy_pop_state ();
rule_length++;
return ID;
}
}
[^\'\\]+ YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in a character literal"));
assert (yy_top_state () == INITIAL);
YY_OBS_FINISH;
yylval->string = last_string;
yy_pop_state ();
return CHARACTER;
}
}
/*----------------------------.
| Decode escaped characters. |
`----------------------------*/
<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>
{
\\[0-7]{1,3} {
unsigned long c = strtoul (yytext + 1, 0, 8);
if (UCHAR_MAX < c)
{
complain_at (*yylloc, _("invalid escape sequence: %s"),
quote (yytext));
YY_STEP;
}
else
obstack_1grow (&string_obstack, c);
}
\\x[0-9a-fA-F]+ {
unsigned long c;
errno = 0;
c = strtoul (yytext + 2, 0, 16);
if (UCHAR_MAX < c || errno)
{
complain_at (*yylloc, _("invalid escape sequence: %s"),
quote (yytext));
YY_STEP;
}
else
obstack_1grow (&string_obstack, c);
}
\\a obstack_1grow (&string_obstack, '\a');
\\b obstack_1grow (&string_obstack, '\b');
\\f obstack_1grow (&string_obstack, '\f');
\\n obstack_1grow (&string_obstack, '\n');
\\r obstack_1grow (&string_obstack, '\r');
\\t obstack_1grow (&string_obstack, '\t');
\\v obstack_1grow (&string_obstack, '\v');
\\[\"\'?\\] obstack_1grow (&string_obstack, yytext[1]);
\\(u|U[0-9a-fA-F]{4})[0-9a-fA-F]{4} {
int c = convert_ucn_to_byte (yytext);
if (c < 0)
{
complain_at (*yylloc, _("invalid escape sequence: %s"),
quote (yytext));
YY_STEP;
}
else
obstack_1grow (&string_obstack, c);
}
\\(.|\n) {
complain_at (*yylloc, _("unrecognized escape sequence: %s"),
quote (yytext));
YY_OBS_GROW;
}
/* FLex wants this rule, in case of a `\<<EOF>>'. */
\\ YY_OBS_GROW;
}
/*----------------------------------------------------------.
| Scanning a C character without decoding its escapes. The |
| initial "'" is already eaten. |
`----------------------------------------------------------*/
<SC_CHARACTER>
{
"'" {
YY_OBS_GROW;
assert (yy_top_state () != INITIAL);
yy_pop_state ();
}
[^'\[\]\\]+ YY_OBS_GROW;
\\{splice}[^\[\]] YY_OBS_GROW;
{splice} YY_OBS_GROW;
/* Needed for `\<<EOF>>', `\\<<newline>>[', and `\\<<newline>>]'. */
\\ YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in a character literal"));
assert (yy_top_state () != INITIAL);
yy_pop_state ();
}
}
/*----------------------------------------------------------------.
| Scanning a C string, without decoding its escapes. The initial |
| `"' is already eaten. |
`----------------------------------------------------------------*/
<SC_STRING>
{
"\"" {
assert (yy_top_state () != INITIAL);
YY_OBS_GROW;
yy_pop_state ();
}
[^\"\[\]\\]+ YY_OBS_GROW;
\\{splice}[^\[\]] YY_OBS_GROW;
{splice} YY_OBS_GROW;
/* Needed for `\<<EOF>>', `\\<<newline>>[', and `\\<<newline>>]'. */
\\ YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in a string"));
assert (yy_top_state () != INITIAL);
yy_pop_state ();
}
}
/*---------------------------------------------------.
| Strings, comments etc. can be found in user code. |
`---------------------------------------------------*/
<SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE>
{
/* Characters. We don't check there is only one. */
"'" YY_OBS_GROW; yy_push_state (SC_CHARACTER);
/* Strings. */
"\"" YY_OBS_GROW; yy_push_state (SC_STRING);
/* Comments. */
"/"{splice}"*" YY_OBS_GROW; yy_push_state (SC_COMMENT);
"/"{splice}"/" YY_OBS_GROW; yy_push_state (SC_LINE_COMMENT);
/* Not comments. */
"/" YY_OBS_GROW;
}
/*---------------------------------------------------------------.
| Scanning some code in braces (%union and actions). The initial |
| "{" is already eaten. |
`---------------------------------------------------------------*/
<SC_BRACED_CODE>
{
"{"|"<"{splice}"%" YY_OBS_GROW; braces_level++;
"%"{splice}">" YY_OBS_GROW; braces_level--;
"}" {
YY_OBS_GROW;
braces_level--;
if (braces_level < 0)
{
yy_pop_state ();
YY_OBS_FINISH;
yylval->string = last_string;
rule_length++;
return BRACED_CODE;
}
}
"$"("<"{tag}">")?(-?[0-9]+|"$") { handle_dollar (current_braced_code,
yytext, *yylloc); }
"@"(-?[0-9]+|"$") { handle_at (current_braced_code,
yytext, *yylloc); }
/* `"<"{splice}"<"' tokenizes `<<%' correctly (as `<<' `%') rather
than incorrrectly (as `<' `<%'). */
[^\"$%\'/<@\[\]\{\}]+|[$%/<@]|"<"{splice}"<" YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in `{ ... }'"));
yy_pop_state ();
YY_OBS_FINISH;
yylval->string = last_string;
return BRACED_CODE;
}
}
/*--------------------------------------------------------------.
| Scanning some prologue: from "%{" (already scanned) to "%}". |
`--------------------------------------------------------------*/
<SC_PROLOGUE>
{
"%}" {
yy_pop_state ();
YY_OBS_FINISH;
yylval->string = last_string;
return PROLOGUE;
}
[^%\[\]/\'\"]+ YY_OBS_GROW;
"%" YY_OBS_GROW;
<<EOF>> {
complain_at (*yylloc, _("unexpected end of file in `%%{ ... %%}'"));
yy_pop_state ();
YY_OBS_FINISH;
yylval->string = last_string;
return PROLOGUE;
}
}
/*---------------------------------------------------------------.
| Scanning the epilogue (everything after the second "%%", which |
| has already been eaten). |
`---------------------------------------------------------------*/
<SC_EPILOGUE>
{
[^\[\]]+ YY_OBS_GROW;
<<EOF>> {
yy_pop_state ();
YY_OBS_FINISH;
yylval->string = last_string;
return EPILOGUE;
}
}
%%
/*------------------------------------------------------------------.
| TEXT is pointing to a wannabee semantic value (i.e., a `$'). |
| |
| Possible inputs: $[<TYPENAME>]($|integer) |
| |
| Output to the STRING_OBSTACK a reference to this semantic value. |
`------------------------------------------------------------------*/
static inline void
handle_action_dollar (char *text, location_t location)
{
const char *type_name = NULL;
char *cp = text + 1;
/* Get the type name if explicit. */
if (*cp == '<')
{
type_name = ++cp;
while (*cp != '>')
++cp;
*cp = '\0';
++cp;
}
if (*cp == '$')
{
if (!type_name)
type_name = symbol_list_n_type_name_get (current_rule, location, 0);
if (!type_name && typed)
complain_at (location, _("$$ of `%s' has no declared type"),
current_rule->sym->tag);
if (!type_name)
type_name = "";
obstack_fgrow1 (&string_obstack,
"]b4_lhs_value([%s])[", type_name);
}
else
{
long num;
errno = 0;
num = strtol (cp, 0, 10);
if (INT_MIN <= num && num <= rule_length && ! errno)
{
int n = num;
if (!type_name && n > 0)
type_name = symbol_list_n_type_name_get (current_rule, location,
n);
if (!type_name && typed)
complain_at (location, _("$%d of `%s' has no declared type"),
n, current_rule->sym->tag);
if (!type_name)
type_name = "";
obstack_fgrow3 (&string_obstack,
"]b4_rhs_value([%d], [%d], [%s])[",
rule_length, n, type_name);
}
else
complain_at (location, _("integer out of range: %s"), quote (text));
}
}
/*---------------------------------------------------------------.
| TEXT is expected to be $$ in some code associated to a symbol: |
| destructor or printer. |
`---------------------------------------------------------------*/
static inline void
handle_symbol_code_dollar (char *text, location_t location)
{
char *cp = text + 1;
if (*cp == '$')
obstack_sgrow (&string_obstack, "]b4_dollar_dollar[");
else
complain_at (location, _("invalid value: %s"), quote (text));
}
/*-----------------------------------------------------------------.
| Dispatch onto handle_action_dollar, or handle_destructor_dollar, |
| depending upon CODE_KIND. |
`-----------------------------------------------------------------*/
static void
handle_dollar (braced_code_t braced_code_kind,
char *text, location_t location)
{
switch (braced_code_kind)
{
case action_braced_code:
handle_action_dollar (text, location);
break;
case destructor_braced_code:
case printer_braced_code:
handle_symbol_code_dollar (text, location);
break;
}
}
/*------------------------------------------------------.
| TEXT is a location token (i.e., a `@...'). Output to |
| STRING_OBSTACK a reference to this location. |
`------------------------------------------------------*/
static inline void
handle_action_at (char *text, location_t location)
{
char *cp = text + 1;
locations_flag = 1;
if (*cp == '$')
{
obstack_sgrow (&string_obstack, "]b4_lhs_location[");
}
else
{
long num;
errno = 0;
num = strtol (cp, 0, 10);
if (INT_MIN <= num && num <= rule_length && ! errno)
{
int n = num;
obstack_fgrow2 (&string_obstack, "]b4_rhs_location([%d], [%d])[",
rule_length, n);
}
else
complain_at (location, _("integer out of range: %s"), quote (text));
}
}
/*---------------------------------------------------------------.
| TEXT is expected to be @$ in some code associated to a symbol: |
| destructor or printer. |
`---------------------------------------------------------------*/
static inline void
handle_symbol_code_at (char *text, location_t location)
{
char *cp = text + 1;
if (*cp == '$')
obstack_sgrow (&string_obstack, "]b4_at_dollar[");
else
complain_at (location, _("invalid value: %s"), quote (text));
}
/*-------------------------------------------------------------------.
| Dispatch onto handle_action_at, or handle_destructor_at, depending |
| upon CODE_KIND. |
`-------------------------------------------------------------------*/
static void
handle_at (braced_code_t braced_code_kind,
char *text, location_t location)
{
switch (braced_code_kind)
{
case action_braced_code:
handle_action_at (text, location);
break;
case destructor_braced_code:
case printer_braced_code:
handle_symbol_code_at (text, location);
break;
}
}
/*------------------------------------------------------------------.
| Convert universal character name UCN to a single-byte character, |
| and return that character. Return -1 if UCN does not correspond |
| to a single-byte character. |
`------------------------------------------------------------------*/
static int
convert_ucn_to_byte (char const *ucn)
{
unsigned long code = strtoul (ucn + 2, 0, 16);
/* FIXME: Currently we assume Unicode-compatible unibyte characters
on ASCII hosts (i.e., Latin-1 on hosts with 8-bit bytes). On
non-ASCII hosts we support only the portable C character set.
These limitations should be removed once we add support for
multibyte characters. */
if (UCHAR_MAX < code)
return -1;
#if ! ('$' == 0x24 && '@' == 0x40 && '`' == 0x60 && '~' == 0x7e)
{
/* A non-ASCII host. Use CODE to index into a table of the C
basic execution character set, which is guaranteed to exist on
all Standard C platforms. This table also includes '$', '@',
and '`', which not in the basic execution character set but
which are unibyte characters on all the platforms that we know
about. */
static signed char const table[] =
{
'\0', -1, -1, -1, -1, -1, -1, '\a',
'\b', '\t', '\n', '\v', '\f', '\r', -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
' ', '!', '"', '#', '$', '%', '&', '\'',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~'
};
code = code < sizeof table ? table[code] : -1;
}
#endif
return code;
}
/*-------------------------.
| Initialize the scanner. |
`-------------------------*/
void
scanner_initialize (void)
{
obstack_init (&string_obstack);
}
/*-----------------------------------------------.
| Free all the memory allocated to the scanner. |
`-----------------------------------------------*/
void
scanner_free (void)
{
obstack_free (&string_obstack, 0);
/* Reclaim Flex's buffers. */
yy_delete_buffer (YY_CURRENT_BUFFER);
}
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