skel.c

Flex词法/语法分析器源码

/* File created from flex.skl via mkskel.sh */

#include "flexdef.h"

const char *skel[] = {
  "/* A lexical scanner generated by flex */",
  "",
  "/* Scanner skeleton version:",
  " * $Header: /home/daffy/u0/vern/flex/RCS/flex.skl,v 2.85 95/04/24 10:48:47 vern Exp $",
  " */",
  "",
  "#define FLEX_SCANNER",
  "#define YY_FLEX_MAJOR_VERSION 2",
  "#define YY_FLEX_MINOR_VERSION 5",
  "",
  "%-",
  "#include <stdio.h>",
  "%*",
  "",
  "",
  "/* cfront 1.2 defines \"c_plusplus\" instead of \"__cplusplus\" */",
  "#ifdef c_plusplus",
  "#ifndef __cplusplus",
  "#define __cplusplus",
  "#endif",
  "#endif",
  "",
  "",
  "#ifdef __cplusplus",
  "",
  "#include <stdlib.h>",
  "%+",
  "class istream;",
  "%*",
  "#include <unistd.h>",
  "",
  "/* Use prototypes in function declarations. */",
  "#define YY_USE_PROTOS",
  "",
  "/* The \"const\" storage-class-modifier is valid. */",
  "#define YY_USE_CONST",
  "",
  "#else	/* ! __cplusplus */",
  "",
  "#if __STDC__",
  "",
  "#define YY_USE_PROTOS",
  "#define YY_USE_CONST",
  "",
  "#endif	/* __STDC__ */",
  "#endif	/* ! __cplusplus */",
  "",
  "#ifdef __TURBOC__",
  " #pragma warn -rch",
  " #pragma warn -use",
  "#include <io.h>",
  "#include <stdlib.h>",
  "#define YY_USE_CONST",
  "#define YY_USE_PROTOS",
  "#endif",
  "",
  "#ifdef YY_USE_CONST",
  "#define yyconst const",
  "#else",
  "#define yyconst",
  "#endif",
  "",
  "",
  "#ifdef YY_USE_PROTOS",
  "#define YY_PROTO(proto) proto",
  "#else",
  "#define YY_PROTO(proto) ()",
  "#endif",
  "",
  "/* Returned upon end-of-file. */",
  "#define YY_NULL 0",
  "",
  "/* Promotes a possibly negative, possibly signed char to an unsigned",
  " * integer for use as an array index.  If the signed char is negative,",
  " * we want to instead treat it as an 8-bit unsigned char, hence the",
  " * double cast.",
  " */",
  "#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)",
  "",
  "/* Enter a start condition.  This macro really ought to take a parameter,",
  " * but we do it the disgusting crufty way forced on us by the ()-less",
  " * definition of BEGIN.",
  " */",
  "#define BEGIN yy_start = 1 + 2 *",
  "",
  "/* Translate the current start state into a value that can be later handed",
  " * to BEGIN to return to the state.  The YYSTATE alias is for lex",
  " * compatibility.",
  " */",
  "#define YY_START ((yy_start - 1) / 2)",
  "#define YYSTATE YY_START",
  "",
  "/* Action number for EOF rule of a given start state. */",
  "#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)",
  "",
  "/* Special action meaning \"start processing a new file\". */",
  "#define YY_NEW_FILE yyrestart( yyin )",
  "",
  "#define YY_END_OF_BUFFER_CHAR 0",
  "",
  "/* Size of default input buffer. */",
  "#define YY_BUF_SIZE 16384",
  "",
  "typedef struct yy_buffer_state *YY_BUFFER_STATE;",
  "",
  "extern int yyleng;",
  "%-",
  "extern FILE *yyin, *yyout;",
  "%*",
  "",
  "#define EOB_ACT_CONTINUE_SCAN 0",
  "#define EOB_ACT_END_OF_FILE 1",
  "#define EOB_ACT_LAST_MATCH 2",
  "",
  "/* The funky do-while in the following #define is used to turn the definition",
  " * int a single C statement (which needs a semi-colon terminator).  This",
  " * avoids problems with code like:",
  " *",
  " * 	if ( condition_holds )",
  " *		yyless( 5 );",
  " *	else",
  " *		do_something_else();",
  " *",
  " * Prior to using the do-while the compiler would get upset at the",
  " * \"else\" because it interpreted the \"if\" statement as being all",
  " * done when it reached the ';' after the yyless() call.",
  " */",
  "",
  "/* Return all but the first 'n' matched characters back to the input stream. */",
  "",
  "#define yyless(n) \\",
  "	do \\",
  "		{ \\",
  "		/* Undo effects of setting up yytext. */ \\",
  "		*yy_cp = yy_hold_char; \\",
  "		yy_c_buf_p = yy_cp = yy_bp + n - YY_MORE_ADJ; \\",
  "		YY_DO_BEFORE_ACTION; /* set up yytext again */ \\",
  "		} \\",
  "	while ( 0 )",
  "",
  "#define unput(c) yyunput( c, yytext_ptr )",
  "",
  "/* The following is because we cannot portably get our hands on size_t",
  " * (without autoconf's help, which isn't available because we want",
  " * flex-generated scanners to compile on their own).",
  " */",
  "typedef unsigned int yy_size_t;",
  "",
  "",
  "struct yy_buffer_state",
  "	{",
  "%-",
  "	FILE *yy_input_file;",
  "%+",
  "	istream* yy_input_file;",
  "%*",
  "",
  "	char *yy_ch_buf;		/* input buffer */",
  "	char *yy_buf_pos;		/* current position in input buffer */",
  "",
  "	/* Size of input buffer in bytes, not including room for EOB",
  "	 * characters.",
  "	 */",
  "	yy_size_t yy_buf_size;",
  "",
  "	/* Number of characters read into yy_ch_buf, not including EOB",
  "	 * characters.",
  "	 */",
  "	int yy_n_chars;",
  "",
  "	/* Whether we \"own\" the buffer - i.e., we know we created it,",
  "	 * and can realloc() it to grow it, and should free() it to",
  "	 * delete it.",
  "	 */",
  "	int yy_is_our_buffer;",
  "",
  "	/* Whether this is an \"interactive\" input source; if so, and",
  "	 * if we're using stdio for input, then we want to use getc()",
  "	 * instead of fread(), to make sure we stop fetching input after",
  "	 * each newline.",
  "	 */",
  "	int yy_is_interactive;",
  "",
  "	/* Whether we're considered to be at the beginning of a line.",
  "	 * If so, '^' rules will be active on the next match, otherwise",
  "	 * not.",
  "	 */",
  "	int yy_at_bol;",
  "",
  "	/* Whether to try to fill the input buffer when we reach the",
  "	 * end of it.",
  "	 */",
  "	int yy_fill_buffer;",
  "",
  "	int yy_buffer_status;",
  "#define YY_BUFFER_NEW 0",
  "#define YY_BUFFER_NORMAL 1",
  "	/* When an EOF's been seen but there's still some text to process",
  "	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we",
  "	 * shouldn't try reading from the input source any more.  We might",
  "	 * still have a bunch of tokens to match, though, because of",
  "	 * possible backing-up.",
  "	 *",
  "	 * When we actually see the EOF, we change the status to \"new\"",
  "	 * (via yyrestart()), so that the user can continue scanning by",
  "	 * just pointing yyin at a new input file.",
  "	 */",
  "#define YY_BUFFER_EOF_PENDING 2",
  "	};",
  "",
  "%- Standard (non-C++) definition",
  "static YY_BUFFER_STATE yy_current_buffer = 0;",
  "%*",
  "",
  "/* We provide macros for accessing buffer states in case in the",
  " * future we want to put the buffer states in a more general",
  " * \"scanner state\".",
  " */",
  "#define YY_CURRENT_BUFFER yy_current_buffer",
  "",
  "",
  "%- Standard (non-C++) definition",
  "/* yy_hold_char holds the character lost when yytext is formed. */",
  "static char yy_hold_char;",
  "",
  "static int yy_n_chars;		/* number of characters read into yy_ch_buf */",
  "",
  "",
  "int yyleng;",
  "",
  "/* Points to current character in buffer. */",
  "static char *yy_c_buf_p = (char *) 0;",
  "static int yy_init = 1;		/* whether we need to initialize */",
  "static int yy_start = 0;	/* start state number */",
  "",
  "/* Flag which is used to allow yywrap()'s to do buffer switches",
  " * instead of setting up a fresh yyin.  A bit of a hack ...",
  " */",
  "static int yy_did_buffer_switch_on_eof;",
  "",
  "void yyrestart YY_PROTO(( FILE *input_file ));",
  "",
  "void yy_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer ));",
  "void yy_load_buffer_state YY_PROTO(( void ));",
  "YY_BUFFER_STATE yy_create_buffer YY_PROTO(( FILE *file, int size ));",
  "void yy_delete_buffer YY_PROTO(( YY_BUFFER_STATE b ));",
  "void yy_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file ));",
  "void yy_flush_buffer YY_PROTO(( YY_BUFFER_STATE b ));",
  "#define YY_FLUSH_BUFFER yy_flush_buffer( yy_current_buffer )",
  "",
  "YY_BUFFER_STATE yy_scan_buffer YY_PROTO(( char *base, yy_size_t size ));",
  "YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *str ));",
  "YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len ));",
  "%*",
  "",
  "static void *yy_flex_alloc YY_PROTO(( yy_size_t ));",
  "static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t ));",
  "static void yy_flex_free YY_PROTO(( void * ));",
  "",
  "#define yy_new_buffer yy_create_buffer",
  "",
  "#define yy_set_interactive(is_interactive) \\",
  "	{ \\",
  "	if ( ! yy_current_buffer ) \\",
  "		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \\",
  "	yy_current_buffer->yy_is_interactive = is_interactive; \\",
  "	}",
  "",
  "#define yy_set_bol(at_bol) \\",
  "	{ \\",
  "	if ( ! yy_current_buffer ) \\",
  "		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \\",
  "	yy_current_buffer->yy_at_bol = at_bol; \\",
  "	}",
  "",
  "#define YY_AT_BOL() (yy_current_buffer->yy_at_bol)",
  "",
  "%% yytext/yyin/yyout/yy_state_type/yylineno etc. def's & init go here",
  "",
  "%- Standard (non-C++) definition",
  "static yy_state_type yy_get_previous_state YY_PROTO(( void ));",
  "static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state ));",
  "static int yy_get_next_buffer YY_PROTO(( void ));",
  "static void yy_fatal_error YY_PROTO(( yyconst char msg[] ));",
  "%*",
  "",
  "/* Done after the current pattern has been matched and before the",
  " * corresponding action - sets up yytext.",
  " */",
  "#define YY_DO_BEFORE_ACTION \\",
  "	yytext_ptr = yy_bp; \\",
  "%% code to fiddle yytext and yyleng for yymore() goes here",
  "	yy_hold_char = *yy_cp; \\",
  "	*yy_cp = '\\0'; \\",
  "%% code to copy yytext_ptr to yytext[] goes here, if %array",
  "	yy_c_buf_p = yy_cp;",
  "",
  "%% data tables for the DFA and the user's section 1 definitions go here",
  "",
  "/* Macros after this point can all be overridden by user definitions in",
  " * section 1.",
  " */",
  "",
  "#ifndef YY_SKIP_YYWRAP",
  "#ifdef __cplusplus",
  "extern \"C\" int yywrap YY_PROTO(( void ));",
  "#else",
  "extern int yywrap YY_PROTO(( void ));",
  "#endif",
  "#endif",
  "",
  "%-",
  "#ifndef YY_NO_UNPUT",
  "static void yyunput YY_PROTO(( int c, char *buf_ptr ));",
  "#endif",
  "%*",
  "",
  "#ifndef yytext_ptr",
  "static void yy_flex_strncpy YY_PROTO(( char *, yyconst char *, int ));",
  "#endif",
  "",
  "#ifndef YY_NO_INPUT",
  "%- Standard (non-C++) definition",
  "#ifdef __cplusplus",
  "static int yyinput YY_PROTO(( void ));",
  "#else",
  "static int input YY_PROTO(( void ));",
  "#endif",
  "%*",
  "#endif",
  "",
  "#if YY_STACK_USED",
  "static int yy_start_stack_ptr = 0;",
  "static int yy_start_stack_depth = 0;",
  "static int *yy_start_stack = 0;",
  "#ifndef YY_NO_PUSH_STATE",
  "static void yy_push_state YY_PROTO(( int new_state ));",
  "#endif",
  "#ifndef YY_NO_POP_STATE",
  "static void yy_pop_state YY_PROTO(( void ));",
  "#endif",
  "#ifndef YY_NO_TOP_STATE",
  "static int yy_top_state YY_PROTO(( void ));",
  "#endif",
  "",
  "#else",
  "#define YY_NO_PUSH_STATE 1",
  "#define YY_NO_POP_STATE 1",
  "#define YY_NO_TOP_STATE 1",
  "#endif",
  "",
  "#ifdef YY_MALLOC_DECL",
  "YY_MALLOC_DECL",
  "#else",
  "#if __STDC__",
  "#ifndef __cplusplus",
  "#include <stdlib.h>",
  "#endif",
  "#else",
  "/* Just try to get by without declaring the routines.  This will fail",
  " * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int)",
  " * or sizeof(void*) != sizeof(int).",
  " */",
  "#endif",
  "#endif",
  "",
  "/* Amount of stuff to slurp up with each read. */",
  "#ifndef YY_READ_BUF_SIZE",
  "#define YY_READ_BUF_SIZE 8192",
  "#endif",
  "",
  "/* Copy whatever the last rule matched to the standard output. */",
  "",
  "#ifndef ECHO",
  "%- Standard (non-C++) definition",
  "/* This used to be an fputs(), but since the string might contain NUL's,",
  " * we now use fwrite().",
  " */",
  "#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )",
  "%+ C++ definition",
  "#define ECHO LexerOutput( yytext, yyleng )",
  "%*",
  "#endif",
  "",
  "/* Gets input and stuffs it into \"buf\".  number of characters read, or YY_NULL,",
  " * is returned in \"result\".",
  " */",
  "#ifndef YY_INPUT",
  "#define YY_INPUT(buf,result,max_size) \\",
  "%% fread()/read() definition of YY_INPUT goes here unless we're doing C++",
  "%+ C++ definition",
  "	if ( (result = LexerInput( (char *) buf, max_size )) < 0 ) \\",
  "		YY_FATAL_ERROR( \"input in flex scanner failed\" );",
  "%*",
  "#endif",
  "",
  "/* No semi-colon after return; correct usage is to write \"yyterminate();\" -",
  " * we don't want an extra ';' after the \"return\" because that will cause",
  " * some compilers to complain about unreachable statements.",
  " */",
  "#ifndef yyterminate",
  "#define yyterminate() return YY_NULL",
  "#endif",
  "",
  "/* Number of entries by which start-condition stack grows. */",
  "#ifndef YY_START_STACK_INCR",
  "#define YY_START_STACK_INCR 25",
  "#endif",
  "",
  "/* Report a fatal error. */",
  "#ifndef YY_FATAL_ERROR",
  "%-",
  "#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )",
  "%+",
  "#define YY_FATAL_ERROR(msg) LexerError( msg )",
  "%*",
  "#endif",
  "",
  "/* Default declaration of generated scanner - a define so the user can",
  " * easily add parameters.",
  " */",
  "#ifndef YY_DECL",
  "%- Standard (non-C++) definition",
  "#define YY_DECL int yylex YY_PROTO(( void ))",
  "%+ C++ definition",
  "#define YY_DECL int yyFlexLexer::yylex()",
  "%*",
  "#endif",
  "",
  "/* Code executed at the beginning of each rule, after yytext and yyleng",
  " * have been set up.",
  " */",
  "#ifndef YY_USER_ACTION",
  "#define YY_USER_ACTION",
  "#endif",
  "",
  "/* Code executed at the end of each rule. */",
  "#ifndef YY_BREAK",
  "#define YY_BREAK break;",
  "#endif",
  "",
  "%% YY_RULE_SETUP definition goes here",
  "",
  "YY_DECL",
  "	{",
  "	register yy_state_type yy_current_state;",
  "	register char *yy_cp, *yy_bp;",
  "	register int yy_act;",
  "",
  "%% user's declarations go here",
  "",
  "	if ( yy_init )",
  "		{",
  "		yy_init = 0;",
  "",
  "#ifdef YY_USER_INIT",
  "		YY_USER_INIT;",
  "#endif",
  "",
  "		if ( ! yy_start )",
  "			yy_start = 1;	/* first start state */",
  "",
  "		if ( ! yyin )",
  "%-",
  "			yyin = stdin;",
  "%+",
  "			yyin = &cin;",
  "%*",
  "",
  "		if ( ! yyout )",
  "%-",
  "			yyout = stdout;",
  "%+",
  "			yyout = &cout;",
  "%*",
  "",
  "		if ( ! yy_current_buffer )",
  "			yy_current_buffer =",
  "				yy_create_buffer( yyin, YY_BUF_SIZE );",
  "",
  "		yy_load_buffer_state();",
  "		}",
  "",
  "	while ( 1 )		/* loops until end-of-file is reached */",
  "		{",
  "%% yymore()-related code goes here",
  "		yy_cp = yy_c_buf_p;",
  "",
  "		/* Support of yytext. */",
  "		*yy_cp = yy_hold_char;",
  "",
  "		/* yy_bp points to the position in yy_ch_buf of the start of",
  "		 * the current run.",
  "		 */",
  "		yy_bp = yy_cp;",
  "",
  "%% code to set up and find next match goes here",
  "",
  "yy_find_action:",
  "%% code to find the action number goes here",
  "",