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.gitignore	50 B	0644	Edit Rename Delete
Makefile	951 B	0644	Edit Rename Delete
genksyms.c	22.16 KB	0644	Edit Rename Delete
genksyms.h	2.04 KB	0644	Edit Rename Delete
keywords.c	2.2 KB	0644	Edit Rename Delete
lex.l	8.26 KB	0644	Edit Rename Delete
parse.y	10.92 KB	0644	Edit Rename Delete

Edit File:lex.l

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Lexical analysis for genksyms.
 * Copyright 1996, 1997 Linux International.
 *
 * New implementation contributed by Richard Henderson <rth@tamu.edu>
 * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
 *
 * Taken from Linux modutils 2.4.22.
 */

#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "genksyms.h"
#include "parse.tab.h"

/* We've got a two-level lexer here.  We let flex do basic tokenization
   and then we categorize those basic tokens in the second stage.  */
#define YY_DECL		static int yylex1(void)

IDENT			[A-Za-z_\$][A-Za-z0-9_\$]*

O_INT			0[0-7]*
D_INT			[1-9][0-9]*
X_INT			0[Xx][0-9A-Fa-f]+
I_SUF			[Uu]|[Ll]|[Uu][Ll]|[Ll][Uu]
INT			({O_INT}|{D_INT}|{X_INT}){I_SUF}?

FRAC			([0-9]*\.[0-9]+)|([0-9]+\.)
EXP			[Ee][+-]?[0-9]+
F_SUF			[FfLl]
REAL			({FRAC}{EXP}?{F_SUF}?)|([0-9]+{EXP}{F_SUF}?)

STRING			L?\"([^\\\"]*\\.)*[^\\\"]*\"
CHAR			L?\'([^\\\']*\\.)*[^\\\']*\'

MC_TOKEN		([~%^&*+=|<>/-]=)|(&&)|("||")|(->)|(<<)|(>>)

/* We don't do multiple input files.  */
%option noyywrap

%option noinput

/* Keep track of our location in the original source files.  */
^#[ \t]+{INT}[ \t]+\"[^\"\n]+\".*\n	return FILENAME;
^#.*\n					cur_line++;
\n					cur_line++;

/* Ignore all other whitespace.  */
[ \t\f\v\r]+				;

{STRING}				return STRING;
{CHAR}					return CHAR;
{IDENT}					return IDENT;

/* The Pedant requires that the other C multi-character tokens be
    recognized as tokens.  We don't actually use them since we don't
    parse expressions, but we do want whitespace to be arranged
    around them properly.  */
{MC_TOKEN}				return OTHER;
{INT}					return INT;
{REAL}					return REAL;

"..."					return DOTS;

/* All other tokens are single characters.  */
.					return yytext[0];

/* Bring in the keyword recognizer.  */

#include "keywords.c"

/* Macros to append to our phrase collection list.  */

/*
 * We mark any token, that that equals to a known enumerator, as
 * SYM_ENUM_CONST. The parser will change this for struct and union tags later,
 * the only problem is struct and union members:
 *    enum e { a, b }; struct s { int a, b; }
 * but in this case, the only effect will be, that the ABI checksums become
 * more volatile, which is acceptable. Also, such collisions are quite rare,
 * so far it was only observed in include/linux/telephony.h.
 */
#define _APP(T,L)	do {						   \
			  cur_node = next_node;				   \
			  next_node = xmalloc(sizeof(*next_node));	   \
			  next_node->next = cur_node;			   \
			  cur_node->string = memcpy(xmalloc(L+1), T, L+1); \
			  cur_node->tag =				   \
			    find_symbol(cur_node->string, SYM_ENUM_CONST, 1)?\
			    SYM_ENUM_CONST : SYM_NORMAL ;		   \
			  cur_node->in_source_file = in_source_file;       \
			} while (0)

#define APP		_APP(yytext, yyleng)

/* The second stage lexer.  Here we incorporate knowledge of the state
   of the parser to tailor the tokens that are returned.  */

int
yylex(void)
{
  static enum {
    ST_NOTSTARTED, ST_NORMAL, ST_ATTRIBUTE, ST_ASM, ST_TYPEOF, ST_TYPEOF_1,
    ST_BRACKET, ST_BRACE, ST_EXPRESSION, ST_STATIC_ASSERT,
  } lexstate = ST_NOTSTARTED;

static int suppress_type_lookup, dont_want_brace_phrase;
  static struct string_list *next_node;
  static char *source_file;

int token, count = 0;
  struct string_list *cur_node;

if (lexstate == ST_NOTSTARTED)
    {
      next_node = xmalloc(sizeof(*next_node));
      next_node->next = NULL;
      lexstate = ST_NORMAL;
    }

repeat:
  token = yylex1();

if (token == 0)
    return 0;
  else if (token == FILENAME)
    {
      char *file, *e;

/* Save the filename and line number for later error messages.  */

if (cur_filename)
	free(cur_filename);

file = strchr(yytext, '\"')+1;
      e = strchr(file, '\"');
      *e = '\0';
      cur_filename = memcpy(xmalloc(e-file+1), file, e-file+1);
      cur_line = atoi(yytext+2);

if (!source_file) {
        source_file = xstrdup(cur_filename);
        in_source_file = 1;
      } else {
        in_source_file = (strcmp(cur_filename, source_file) == 0);
      }

goto repeat;
    }

switch (lexstate)
    {
    case ST_NORMAL:
      switch (token)
	{
	case IDENT:
	  APP;
	  {
	    int r = is_reserved_word(yytext, yyleng);
	    if (r >= 0)
	      {
		switch (token = r)
		  {
		  case ATTRIBUTE_KEYW:
		    lexstate = ST_ATTRIBUTE;
		    count = 0;
		    goto repeat;
		  case ASM_KEYW:
		    lexstate = ST_ASM;
		    count = 0;
		    goto repeat;
		  case TYPEOF_KEYW:
		    lexstate = ST_TYPEOF;
		    count = 0;
		    goto repeat;

case STRUCT_KEYW:
		  case UNION_KEYW:
		  case ENUM_KEYW:
		    dont_want_brace_phrase = 3;
		    suppress_type_lookup = 2;
		    goto fini;

case EXPORT_SYMBOL_KEYW:
		      goto fini;

case STATIC_ASSERT_KEYW:
		    lexstate = ST_STATIC_ASSERT;
		    count = 0;
		    goto repeat;
		  }
	      }
	    if (!suppress_type_lookup)
	      {
		if (find_symbol(yytext, SYM_TYPEDEF, 1))
		  token = TYPE;
	      }
	  }
	  break;

case '[':
	  APP;
	  lexstate = ST_BRACKET;
	  count = 1;
	  goto repeat;

case '{':
	  APP;
	  if (dont_want_brace_phrase)
	    break;
	  lexstate = ST_BRACE;
	  count = 1;
	  goto repeat;

case '=': case ':':
	  APP;
	  lexstate = ST_EXPRESSION;
	  break;

default:
	  APP;
	  break;
	}
      break;

case ST_ATTRIBUTE:
      APP;
      switch (token)
	{
	case '(':
	  ++count;
	  goto repeat;
	case ')':
	  if (--count == 0)
	    {
	      lexstate = ST_NORMAL;
	      token = ATTRIBUTE_PHRASE;
	      break;
	    }
	  goto repeat;
	default:
	  goto repeat;
	}
      break;

case ST_ASM:
      APP;
      switch (token)
	{
	case '(':
	  ++count;
	  goto repeat;
	case ')':
	  if (--count == 0)
	    {
	      lexstate = ST_NORMAL;
	      token = ASM_PHRASE;
	      break;
	    }
	  goto repeat;
	default:
	  goto repeat;
	}
      break;

case ST_TYPEOF_1:
      if (token == IDENT)
	{
	  if (is_reserved_word(yytext, yyleng) >= 0
	      || find_symbol(yytext, SYM_TYPEDEF, 1))
	    {
	      yyless(0);
	      unput('(');
	      lexstate = ST_NORMAL;
	      token = TYPEOF_KEYW;
	      break;
	    }
	  _APP("(", 1);
	}
	lexstate = ST_TYPEOF;
	/* FALLTHRU */

case ST_TYPEOF:
      switch (token)
	{
	case '(':
	  if ( ++count == 1 )
	    lexstate = ST_TYPEOF_1;
	  else
	    APP;
	  goto repeat;
	case ')':
	  APP;
	  if (--count == 0)
	    {
	      lexstate = ST_NORMAL;
	      token = TYPEOF_PHRASE;
	      break;
	    }
	  goto repeat;
	default:
	  APP;
	  goto repeat;
	}
      break;

case ST_BRACKET:
      APP;
      switch (token)
	{
	case '[':
	  ++count;
	  goto repeat;
	case ']':
	  if (--count == 0)
	    {
	      lexstate = ST_NORMAL;
	      token = BRACKET_PHRASE;
	      break;
	    }
	  goto repeat;
	default:
	  goto repeat;
	}
      break;

case ST_BRACE:
      APP;
      switch (token)
	{
	case '{':
	  ++count;
	  goto repeat;
	case '}':
	  if (--count == 0)
	    {
	      lexstate = ST_NORMAL;
	      token = BRACE_PHRASE;
	      break;
	    }
	  goto repeat;
	default:
	  goto repeat;
	}
      break;

case ST_EXPRESSION:
      switch (token)
	{
	case '(': case '[': case '{':
	  ++count;
	  APP;
	  goto repeat;
	case '}':
	  /* is this the last line of an enum declaration? */
	  if (count == 0)
	    {
	      /* Put back the token we just read so's we can find it again
		 after registering the expression.  */
	      unput(token);

lexstate = ST_NORMAL;
	      token = EXPRESSION_PHRASE;
	      break;
	    }
	  /* FALLTHRU */
	case ')': case ']':
	  --count;
	  APP;
	  goto repeat;
	case ',': case ';':
	  if (count == 0)
	    {
	      /* Put back the token we just read so's we can find it again
		 after registering the expression.  */
	      unput(token);

lexstate = ST_NORMAL;
	      token = EXPRESSION_PHRASE;
	      break;
	    }
	  APP;
	  goto repeat;
	default:
	  APP;
	  goto repeat;
	}
      break;

case ST_STATIC_ASSERT:
      APP;
      switch (token)
	{
	case '(':
	  ++count;
	  goto repeat;
	case ')':
	  if (--count == 0)
	    {
	      lexstate = ST_NORMAL;
	      token = STATIC_ASSERT_PHRASE;
	      break;
	    }
	  goto repeat;
	default:
	  goto repeat;
	}
      break;

default:
      exit(1);
    }
fini:

if (suppress_type_lookup > 0)
    --suppress_type_lookup;
  if (dont_want_brace_phrase > 0)
    --dont_want_brace_phrase;

yylval = &next_node->next;

return token;
}

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current directory: / / usr / src / linux-headers-5.15.0-140 / scripts / genksyms

Edit File:lex.l