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/* -*-C-*-
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 * Wrc preprocessor lexical analysis
 *
 * Copyright 1999-2000	Bertho A. Stultiens (BS)
 *
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 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 *
 * History:
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 * 24-Apr-2000 BS	- Started from scratch to restructure everything
 *			  and reintegrate the source into the wine-tree.
 * 04-Jan-2000 BS	- Added comments about the lexicographical
 *			  grammar to give some insight in the complexity.
 * 28-Dec-1999 BS	- Eliminated backing-up of the flexer by running
 *			  `flex -b' on the source. This results in some
 *			  weirdo extra rules, but a much faster scanner.
 * 23-Dec-1999 BS	- Started this file
 *
 *-------------------------------------------------------------------------
 * The preprocessor's lexographical grammar (approximately):
 *
 * pp		:= {ws} # {ws} if {ws} {expr} {ws} \n
 *		|  {ws} # {ws} ifdef {ws} {id} {ws} \n
 *		|  {ws} # {ws} ifndef {ws} {id} {ws} \n
 *		|  {ws} # {ws} elif {ws} {expr} {ws} \n
 *		|  {ws} # {ws} else {ws} \n
 *		|  {ws} # {ws} endif {ws} \n
 *		|  {ws} # {ws} include {ws} < {anytext} > \n
 *		|  {ws} # {ws} include {ws} " {anytext} " \n
 *		|  {ws} # {ws} define {ws} {anytext} \n
 *		|  {ws} # {ws} define( {arglist} ) {ws} {expansion} \n
 *		|  {ws} # {ws} pragma {ws} {anytext} \n
 *		|  {ws} # {ws} ident {ws} {anytext} \n
 *		|  {ws} # {ws} error {ws} {anytext} \n
 *		|  {ws} # {ws} warning {ws} {anytext} \n
 *		|  {ws} # {ws} line {ws} " {anytext} " {number} \n
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 *		|  {ws} # {ws} {number} " {anytext} " {number} [ {number} [{number}] ] \n
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 *		|  {ws} # {ws} \n
 *
 * ws		:= [ \t\r\f\v]*
 *
 * expr		:= {expr} [+-*%^/|&] {expr}
 *		|  {expr} {logor|logand} {expr}
 *		|  [!~+-] {expr}
 *		|  {expr} ? {expr} : {expr}
 *
 * logor	:= ||
 *
 * logand	:= &&
 *
 * id		:= [a-zA-Z_][a-zA-Z0-9_]*
 *
 * anytext	:= [^\n]*	(see note)
 *
 * arglist	:=
 *		|  {id}
 *		|  {arglist} , {id}
 *		|  {arglist} , {id} ...
 *
 * expansion	:= {id}
 *		|  # {id}
 *		|  {anytext}
 *		|  {anytext} ## {anytext}
 *
 * number	:= [0-9]+
 *
 * Note: "anytext" is not always "[^\n]*". This is because the
 *	 trailing context must be considered as well.
 *
 * The only certain assumption for the preprocessor to make is that
 * directives start at the beginning of the line, followed by a '#'
 * and end with a newline.
 * Any directive may be suffixed with a line-continuation. Also
 * classical comment / *...* / (note: no comments within comments,
 * therefore spaces) is considered to be a line-continuation
 * (according to gcc and egcs AFAIK, ANSI is a bit vague).
Francois Gouget's avatar
Francois Gouget committed
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 * Comments have not been added to the above grammar for simplicity
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 * reasons. However, it is allowed to enter comment anywhere within
 * the directives as long as they do not interfere with the context.
 * All comments are considered to be deletable whitespace (both
 * classical form "/ *...* /" and C++ form "//...\n").
 *
 * All recursive scans, except for macro-expansion, are done by the
 * parser, whereas the simple state transitions of non-recursive
 * directives are done in the scanner. This results in the many
 * exclusive start-conditions of the scanner.
 *
 * Macro expansions are slightly more difficult because they have to
 * prescan the arguments. Parameter substitution is literal if the
 * substitution is # or ## (either side). This enables new identifiers
 * to be created (see 'info cpp' node Macro|Pitfalls|Prescan for more
 * information).
 *
 * FIXME: Variable macro parameters is recognized, but not yet
 * expanded. I have to reread the ANSI standard on the subject (yes,
 * ANSI defines it).
 *
 * The following special defines are supported:
 * __FILE__	-> "thissource.c"
 * __LINE__	-> 123
 * __DATE__	-> "May  1 2000"
 * __TIME__	-> "23:59:59"
 * These macros expand, as expected, into their ANSI defined values.
 *
 * The same include prevention is implemented as gcc and egcs does.
 * This results in faster processing because we do not read the text
 * at all. Some wine-sources attempt to include the same file 4 or 5
 * times. This strategy also saves a lot blank output-lines, which in
 * its turn improves the real resource scanner/parser.
 *
 */

/*
 * Special flex options and exclusive scanner start-conditions
 */
%option stack
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%option 8bit never-interactive
%option nounput
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%option prefix="ppy_"
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%x pp_pp
%x pp_eol
%x pp_inc
%x pp_dqs
%x pp_sqs
%x pp_iqs
%x pp_comment
%x pp_def
%x pp_define
%x pp_macro
%x pp_mbody
%x pp_macign
%x pp_macscan
%x pp_macexp
%x pp_if
%x pp_ifd
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%x pp_endif
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%x pp_line
%x pp_defined
%x pp_ignore
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%x RCINCL
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ws	[ \v\f\t\r]
cident	[a-zA-Z_][0-9a-zA-Z_]*
ul	[uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]

%{
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#include <config.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>

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#include "wpp_private.h"
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#include "ppy.tab.h"
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/*
 * Make sure that we are running an appropriate version of flex.
 */
#if !defined(YY_FLEX_MAJOR_VERSION) || (1000 * YY_FLEX_MAJOR_VERSION + YY_FLEX_MINOR_VERSION < 2005)
#error Must use flex version 2.5.1 or higher (yy_scan_* routines are required).
#endif

#define YY_READ_BUF_SIZE	65536		/* So we read most of a file at once */

#define yy_current_state()	YY_START
#define yy_pp_state(x)		yy_pop_state(); yy_push_state(x)

/*
 * Always update the current character position within a line
 */
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#define YY_USER_ACTION	pp_status.char_number+=ppy_leng;
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/*
 * Buffer management for includes and expansions
 */
#define MAXBUFFERSTACK	128	/* Nesting more than 128 includes or macro expansion textss is insane */

typedef struct bufferstackentry {
	YY_BUFFER_STATE	bufferstate;	/* Buffer to switch back to */
	pp_entry_t	*define;	/* Points to expanding define or NULL if handling includes */
	int		line_number;	/* Line that we were handling */
	int		char_number;	/* The current position on that line */
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	const char	*filename;	/* Filename that we were handling */
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	int		if_depth;	/* How many #if:s deep to check matching #endif:s */
	int		ncontinuations;	/* Remember the continuation state */
	int		should_pop;	/* Set if we must pop the start-state on EOF */
	/* Include management */
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        include_state_t incl;
	char 		*include_filename;
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	int 		pass_data;
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} bufferstackentry_t;

#define ALLOCBLOCKSIZE	(1 << 10)	/* Allocate these chunks at a time for string-buffers */

/*
 * Macro expansion nesting
 * We need the stack to handle expansions while scanning
 * a macro's arguments. The TOS must always be the macro
 * that receives the current expansion from the scanner.
 */
#define MAXMACEXPSTACK	128	/* Nesting more than 128 macro expansions is insane */

typedef struct macexpstackentry {
	pp_entry_t	*ppp;		/* This macro we are scanning */
	char		**args;		/* With these arguments */
	char		**ppargs;	/* Resulting in these preprocessed arguments */
	int		*nnls;		/* Number of newlines per argument */
	int		nargs;		/* And this many arguments scanned */
	int		parentheses;	/* Nesting level of () */
	int		curargsize;	/* Current scanning argument's size */
	int		curargalloc;	/* Current scanning argument's block allocated */
	char		*curarg;	/* Current scanning argument's content */
} macexpstackentry_t;

#define MACROPARENTHESES()	(top_macro()->parentheses)

/*
 * Prototypes
 */
static void newline(int);
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static int make_number(int radix, YYSTYPE *val, const char *str, int len);
static void put_buffer(const char *s, int len);
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static int is_c_h_include(char *fname, int quoted);
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/* Buffer management */
static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop);
static bufferstackentry_t *pop_buffer(void);
/* String functions */
static void new_string(void);
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static void add_string(const char *str, int len);
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static char *get_string(void);
static void put_string(void);
static int string_start(void);
/* Macro functions */
static void push_macro(pp_entry_t *ppp);
static macexpstackentry_t *top_macro(void);
static macexpstackentry_t *pop_macro(void);
static void free_macro(macexpstackentry_t *mep);
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static void add_text_to_macro(const char *text, int len);
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static void macro_add_arg(int last);
static void macro_add_expansion(void);
/* Expansion */
static void expand_special(pp_entry_t *ppp);
static void expand_define(pp_entry_t *ppp);
static void expand_macro(macexpstackentry_t *mep);

/*
 * Local variables
 */
static int ncontinuations;

static int strbuf_idx = 0;
static int strbuf_alloc = 0;
static char *strbuffer = NULL;
static int str_startline;

static macexpstackentry_t *macexpstack[MAXMACEXPSTACK];
static int macexpstackidx = 0;

static bufferstackentry_t bufferstack[MAXBUFFERSTACK];
static int bufferstackidx = 0;

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static int pass_data=1;

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/*
 * Global variables
 */
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include_state_t pp_incl_state =
{
    -1,    /* state */
    NULL,  /* ppp */
    0,     /* ifdepth */
    0      /* seen_junk */
};

includelogicentry_t *pp_includelogiclist = NULL;
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%}

/*
 **************************************************************************
 * The scanner starts here
 **************************************************************************
 */

%%
	/*
	 * Catch line-continuations.
	 * Note: Gcc keeps the line-continuations in, for example, strings
	 * intact. However, I prefer to remove them all so that the next
	 * scanner will not need to reduce the continuation state.
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	 *
	 * <*>\\\n		newline(0);
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	 */

	/*
	 * Detect the leading # of a preprocessor directive.
	 */
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<INITIAL,pp_ignore>^{ws}*#	pp_incl_state.seen_junk++; yy_push_state(pp_pp);
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	/*
	 * Scan for the preprocessor directives
	 */
<pp_pp>{ws}*include{ws}*	if(yy_top_state() != pp_ignore) {yy_pp_state(pp_inc); return tINCLUDE;} else {yy_pp_state(pp_eol);}
<pp_pp>{ws}*define{ws}*		yy_pp_state(yy_current_state() != pp_ignore ? pp_def : pp_eol);
<pp_pp>{ws}*error{ws}*		yy_pp_state(pp_eol);	if(yy_top_state() != pp_ignore) return tERROR;
<pp_pp>{ws}*warning{ws}*	yy_pp_state(pp_eol);	if(yy_top_state() != pp_ignore) return tWARNING;
<pp_pp>{ws}*pragma{ws}*		yy_pp_state(pp_eol);	if(yy_top_state() != pp_ignore) return tPRAGMA;
<pp_pp>{ws}*ident{ws}*		yy_pp_state(pp_eol);	if(yy_top_state() != pp_ignore) return tPPIDENT;
<pp_pp>{ws}*undef{ws}*		if(yy_top_state() != pp_ignore) {yy_pp_state(pp_ifd); return tUNDEF;} else {yy_pp_state(pp_eol);}
<pp_pp>{ws}*ifdef{ws}*		yy_pp_state(pp_ifd);	return tIFDEF;
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<pp_pp>{ws}*ifndef{ws}*		pp_incl_state.seen_junk--; yy_pp_state(pp_ifd);	return tIFNDEF;
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<pp_pp>{ws}*if{ws}*		yy_pp_state(pp_if);	return tIF;
<pp_pp>{ws}*elif{ws}*		yy_pp_state(pp_if);	return tELIF;
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<pp_pp>{ws}*else{ws}*		yy_pp_state(pp_endif);  return tELSE;
<pp_pp>{ws}*endif{ws}*		yy_pp_state(pp_endif);  return tENDIF;
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<pp_pp>{ws}*line{ws}*		if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tLINE;} else {yy_pp_state(pp_eol);}
<pp_pp>{ws}+			if(yy_top_state() != pp_ignore) {yy_pp_state(pp_line); return tGCCLINE;} else {yy_pp_state(pp_eol);}
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<pp_pp>{ws}*[a-z]+		ppy_error("Invalid preprocessor token '%s'", ppy_text);
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<pp_pp>\r?\n			newline(1); yy_pop_state(); return tNL;	/* This could be the null-token */
<pp_pp>\\\r?\n			newline(0);
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<pp_pp>\\\r?			ppy_error("Preprocessor junk '%s'", ppy_text);
<pp_pp>.			return *ppy_text;
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	/*
	 * Handle #include and #line
	 */
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<pp_line>[0-9]+			return make_number(10, &ppy_lval, ppy_text, ppy_leng);
<pp_inc>\<			new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_iqs);
<pp_inc,pp_line>\"		new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
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<pp_inc,pp_line>{ws}+		;
<pp_inc,pp_line>\n		newline(1); yy_pop_state(); return tNL;
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<pp_inc,pp_line>\\\r?\n		newline(0);
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<pp_inc,pp_line>(\\\r?)|(.)	ppy_error(yy_current_state() == pp_inc ? "Trailing junk in #include" : "Trailing junk in #line");
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	/*
	 * Ignore all input when a false clause is parsed
	 */
<pp_ignore>[^#/\\\n]+		;
<pp_ignore>\n			newline(1);
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<pp_ignore>\\\r?\n		newline(0);
<pp_ignore>(\\\r?)|(.)		;
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	/*
	 * Handle #if and #elif.
	 * These require conditionals to be evaluated, but we do not
	 * want to jam the scanner normally when we see these tokens.
	 * Note: tIDENT is handled below.
	 */

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<pp_if>0[0-7]*{ul}?		return make_number(8, &ppy_lval, ppy_text, ppy_leng);
<pp_if>0[0-7]*[8-9]+{ul}?	ppy_error("Invalid octal digit");
<pp_if>[1-9][0-9]*{ul}?		return make_number(10, &ppy_lval, ppy_text, ppy_leng);
<pp_if>0[xX][0-9a-fA-F]+{ul}?	return make_number(16, &ppy_lval, ppy_text, ppy_leng);
<pp_if>0[xX]			ppy_error("Invalid hex number");
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<pp_if>defined			yy_push_state(pp_defined); return tDEFINED;
<pp_if>"<<"			return tLSHIFT;
<pp_if>">>"			return tRSHIFT;
<pp_if>"&&"			return tLOGAND;
<pp_if>"||"			return tLOGOR;
<pp_if>"=="			return tEQ;
<pp_if>"!="			return tNE;
<pp_if>"<="			return tLTE;
<pp_if>">="			return tGTE;
<pp_if>\n			newline(1); yy_pop_state(); return tNL;
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<pp_if>\\\r?\n			newline(0);
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<pp_if>\\\r?			ppy_error("Junk in conditional expression");
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<pp_if>{ws}+			;
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<pp_if>\'			new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
<pp_if>\"			ppy_error("String constants not allowed in conditionals");
<pp_if>.			return *ppy_text;
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	/*
	 * Handle #ifdef, #ifndef and #undef
	 * to get only an untranslated/unexpanded identifier
	 */
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<pp_ifd>{cident}	ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
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<pp_ifd>{ws}+		;
<pp_ifd>\n		newline(1); yy_pop_state(); return tNL;
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<pp_ifd>\\\r?\n		newline(0);
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<pp_ifd>(\\\r?)|(.)	ppy_error("Identifier expected");
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	/*
	 * Handle #else and #endif.
	 */
<pp_endif>{ws}+		;
<pp_endif>\n		newline(1); yy_pop_state(); return tNL;
<pp_endif>\\\r?\n	newline(0);
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<pp_endif>.		ppy_error("Garbage after #else or #endif.");
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	/*
	 * Handle the special 'defined' keyword.
	 * This is necessary to get the identifier prior to any
	 * substitutions.
	 */
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<pp_defined>{cident}		yy_pop_state(); ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
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<pp_defined>{ws}+		;
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<pp_defined>(\()|(\))		return *ppy_text;
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<pp_defined>\\\r?\n		newline(0);
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<pp_defined>(\\.)|(\n)|(.)	ppy_error("Identifier expected");
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	/*
	 * Handle #error, #warning, #pragma and #ident.
	 * Pass everything literally to the parser, which
	 * will act appropriately.
	 * Comments are stripped from the literal text.
	 */
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<pp_eol>[^/\\\n]+		if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
<pp_eol>\/[^/\\\n*]*		if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
<pp_eol>(\\\r?)|(\/[^/*])	if(yy_top_state() != pp_ignore) { ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL; }
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<pp_eol>\n			newline(1); yy_pop_state(); if(yy_current_state() != pp_ignore) { return tNL; }
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<pp_eol>\\\r?\n			newline(0);
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	/*
	 * Handle left side of #define
	 */
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<pp_def>{cident}\(		ppy_lval.cptr = pp_xstrdup(ppy_text); ppy_lval.cptr[ppy_leng-1] = '\0'; yy_pp_state(pp_macro);  return tMACRO;
<pp_def>{cident}		ppy_lval.cptr = pp_xstrdup(ppy_text); yy_pp_state(pp_define); return tDEFINE;
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<pp_def>{ws}+			;
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<pp_def>\\\r?\n			newline(0);
<pp_def>(\\\r?)|(\n)|(.)	perror("Identifier expected");
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	/*
	 * Scan the substitution of a define
	 */
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<pp_define>[^'"/\\\n]+		ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
<pp_define>(\\\r?)|(\/[^/*])	ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
<pp_define>\\\r?\n{ws}+		newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
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<pp_define>\\\r?\n		newline(0);
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<pp_define>\n			newline(1); yy_pop_state(); return tNL;
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<pp_define>\'			new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
<pp_define>\"			new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
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	/*
	 * Scan the definition macro arguments
	 */
<pp_macro>\){ws}*		yy_pp_state(pp_mbody); return tMACROEND;
<pp_macro>{ws}+			;
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<pp_macro>{cident}		ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
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<pp_macro>,			return ',';
<pp_macro>"..."			return tELIPSIS;
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<pp_macro>(\\\r?)|(\n)|(.)|(\.\.?)	ppy_error("Argument identifier expected");
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<pp_macro>\\\r?\n		newline(0);
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	/*
	 * Scan the substitution of a macro
	 */
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<pp_mbody>[^a-zA-Z0-9'"#/\\\n]+	ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
<pp_mbody>{cident}		ppy_lval.cptr = pp_xstrdup(ppy_text); return tIDENT;
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<pp_mbody>\#\#			return tCONCAT;
<pp_mbody>\#			return tSTRINGIZE;
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<pp_mbody>[0-9][^'"#/\\\n]*	ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
<pp_mbody>(\\\r?)|(\/[^/*'"#\\\n]*)	ppy_lval.cptr = pp_xstrdup(ppy_text); return tLITERAL;
<pp_mbody>\\\r?\n{ws}+		newline(0); ppy_lval.cptr = pp_xstrdup(" "); return tLITERAL;
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<pp_mbody>\\\r?\n		newline(0);
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<pp_mbody>\n			newline(1); yy_pop_state(); return tNL;
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<pp_mbody>\'			new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
<pp_mbody>\"			new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
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	/*
	 * Macro expansion text scanning.
	 * This state is active just after the identifier is scanned
	 * that triggers an expansion. We *must* delete the leading
	 * whitespace before we can start scanning for arguments.
	 *
	 * If we do not see a '(' as next trailing token, then we have
	 * a false alarm. We just continue with a nose-bleed...
	 */
<pp_macign>{ws}*/\(	yy_pp_state(pp_macscan);
<pp_macign>{ws}*\n	{
		if(yy_top_state() != pp_macscan)
			newline(0);
	}
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<pp_macign>{ws}*\\\r?\n	newline(0);
<pp_macign>{ws}+|{ws}*\\\r?|.	{
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		macexpstackentry_t *mac = pop_macro();
		yy_pop_state();
		put_buffer(mac->ppp->ident, strlen(mac->ppp->ident));
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		put_buffer(ppy_text, ppy_leng);
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		free_macro(mac);
	}

	/*
	 * Macro expansion argument text scanning.
	 * This state is active when a macro's arguments are being read for expansion.
	 */
<pp_macscan>\(	{
		if(++MACROPARENTHESES() > 1)
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			add_text_to_macro(ppy_text, ppy_leng);
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	}
<pp_macscan>\)	{
		if(--MACROPARENTHESES() == 0)
		{
			yy_pop_state();
			macro_add_arg(1);
		}
		else
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			add_text_to_macro(ppy_text, ppy_leng);
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	}
<pp_macscan>,		{
		if(MACROPARENTHESES() > 1)
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			add_text_to_macro(ppy_text, ppy_leng);
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		else
			macro_add_arg(0);
	}
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<pp_macscan>\"		new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
<pp_macscan>\'		new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
520
<pp_macscan>"/*"	yy_push_state(pp_comment); add_text_to_macro(" ", 1);
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<pp_macscan>\n		pp_status.line_number++; pp_status.char_number = 1; add_text_to_macro(ppy_text, ppy_leng);
<pp_macscan>([^/(),\\\n"']+)|(\/[^/*(),\\\n'"]*)|(\\\r?)|(.)	add_text_to_macro(ppy_text, ppy_leng);
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<pp_macscan>\\\r?\n	newline(0);
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	/*
	 * Comment handling (almost all start-conditions)
	 */
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<INITIAL,pp_pp,pp_ignore,pp_eol,pp_inc,pp_if,pp_ifd,pp_endif,pp_defined,pp_def,pp_define,pp_macro,pp_mbody,RCINCL>"/*" yy_push_state(pp_comment);
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<pp_comment>[^*\n]*|"*"+[^*/\n]*	;
<pp_comment>\n				newline(0);
<pp_comment>"*"+"/"			yy_pop_state();

	/*
	 * Remove C++ style comment (almost all start-conditions)
	 */
536
<INITIAL,pp_pp,pp_ignore,pp_eol,pp_inc,pp_if,pp_ifd,pp_endif,pp_defined,pp_def,pp_define,pp_macro,pp_mbody,pp_macscan,RCINCL>"//"[^\n]*	{
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		if(ppy_text[ppy_leng-1] == '\\')
			ppy_warning("C++ style comment ends with an escaped newline (escape ignored)");
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	}

	/*
	 * Single, double and <> quoted constants
	 */
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<INITIAL,pp_macexp>\"		pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_dqs);
<INITIAL,pp_macexp>\'		pp_incl_state.seen_junk++; new_string(); add_string(ppy_text, ppy_leng); yy_push_state(pp_sqs);
<pp_dqs>[^"\\\n]+		add_string(ppy_text, ppy_leng);
547
<pp_dqs>\"			{
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		add_string(ppy_text, ppy_leng);
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		yy_pop_state();
		switch(yy_current_state())
		{
		case pp_pp:
		case pp_define:
		case pp_mbody:
		case pp_inc:
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		case RCINCL:
			if (yy_current_state()==RCINCL) yy_pop_state();
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			ppy_lval.cptr = get_string();
559
			return tDQSTRING;
560
		case pp_line:
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			ppy_lval.cptr = get_string();
			if (is_c_h_include(ppy_lval.cptr, 1)) pass_data=0;
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			else pass_data=1;
			return tDQSTRING;
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		default:
			put_string();
		}
	}
569
<pp_sqs>[^'\\\n]+		add_string(ppy_text, ppy_leng);
570
<pp_sqs>\'			{
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		add_string(ppy_text, ppy_leng);
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		yy_pop_state();
		switch(yy_current_state())
		{
		case pp_if:
		case pp_define:
		case pp_mbody:
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			ppy_lval.cptr = get_string();
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			return tSQSTRING;
		default:
			put_string();
		}
	}
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<pp_iqs>[^\>\\\n]+		add_string(ppy_text, ppy_leng);
585
<pp_iqs>\>			{
586
		add_string(ppy_text, ppy_leng);
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		yy_pop_state();
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		ppy_lval.cptr = get_string();
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		return tIQSTRING;
	}
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<pp_dqs>\\\r?\n		{
		/*
		 * This is tricky; we need to remove the line-continuation
		 * from preprocessor strings, but OTOH retain them in all
		 * other strings. This is because the resource grammar is
		 * even more braindead than initially analysed and line-
		 * continuations in strings introduce, sigh, newlines in
		 * the output. There goes the concept of non-breaking, non-
		 * spacing whitespace.
		 */
		switch(yy_top_state())
		{
		case pp_pp:
		case pp_define:
		case pp_mbody:
		case pp_inc:
		case pp_line:
			newline(0);
			break;
		default:
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			add_string(ppy_text, ppy_leng);
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			newline(-1);
		}
	}
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<pp_iqs,pp_dqs,pp_sqs>\\.	add_string(ppy_text, ppy_leng);
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<pp_iqs,pp_dqs,pp_sqs>\n	{
		newline(1);
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		add_string(ppy_text, ppy_leng);
		ppy_warning("Newline in string constant encounterd (started line %d)", string_start());
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	}

	/*
	 * Identifier scanning
	 */
<INITIAL,pp_if,pp_inc,pp_macexp>{cident}	{
		pp_entry_t *ppp;
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		pp_incl_state.seen_junk++;
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		if(!(ppp = pplookup(ppy_text)))
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		{
			if(yy_current_state() == pp_inc)
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				ppy_error("Expected include filename");
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			if(yy_current_state() == pp_if)
			{
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				ppy_lval.cptr = pp_xstrdup(ppy_text);
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				return tIDENT;
			}
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			else {
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				if((yy_current_state()==INITIAL) && (strcasecmp(ppy_text,"RCINCLUDE")==0)){
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					yy_push_state(RCINCL);
					return tRCINCLUDE;
				}
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				else put_buffer(ppy_text, ppy_leng);
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			}
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		}
		else if(!ppp->expanding)
		{
			switch(ppp->type)
			{
			case def_special:
				expand_special(ppp);
				break;
			case def_define:
				expand_define(ppp);
				break;
			case def_macro:
				yy_push_state(pp_macign);
				push_macro(ppp);
				break;
			default:
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				pp_internal_error(__FILE__, __LINE__, "Invalid define type %d\n", ppp->type);
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			}
		}
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		else put_buffer(ppy_text, ppy_leng);
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	}

	/*
	 * Everything else that needs to be passed and
	 * newline and continuation handling
	 */
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<INITIAL,pp_macexp>[^a-zA-Z_#'"/\\\n \r\t\f\v]+|(\/|\\)[^a-zA-Z_/*'"\\\n \r\t\v\f]*	pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
<INITIAL,pp_macexp>{ws}+	put_buffer(ppy_text, ppy_leng);
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<INITIAL>\n			newline(1);
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<INITIAL>\\\r?\n		newline(0);
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<INITIAL>\\\r?			pp_incl_state.seen_junk++; put_buffer(ppy_text, ppy_leng);
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	/*
	 * Special catcher for macro argmument expansion to prevent
	 * newlines to propagate to the output or admin.
	 */
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<pp_macexp>(\n)|(.)|(\\\r?(\n|.))	put_buffer(ppy_text, ppy_leng);
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<RCINCL>[A-Za-z0-9_\.\\/]+ {
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		ppy_lval.cptr=pp_xstrdup(ppy_text);
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        	yy_pop_state();
		return tRCINCLUDEPATH;
	}

<RCINCL>{ws}+ ;

<RCINCL>\"		{
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		new_string(); add_string(ppy_text,ppy_leng);yy_push_state(pp_dqs);
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	}

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	/*
	 * This is a 'catch-all' rule to discover errors in the scanner
	 * in an orderly manner.
	 */
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<*>.		pp_incl_state.seen_junk++; ppy_warning("Unmatched text '%c' (0x%02x); please report\n", isprint(*ppy_text & 0xff) ? *ppy_text : ' ', *ppy_text);
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<<EOF>>	{
		YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
		bufferstackentry_t *bep = pop_buffer();

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		if((!bep && pp_get_if_depth()) || (bep && pp_get_if_depth() != bep->if_depth))
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			ppy_warning("Unmatched #if/#endif at end of file");
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		if(!bep)
		{
			if(YY_START != INITIAL)
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				ppy_error("Unexpected end of file during preprocessing");
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			yyterminate();
		}
		else if(bep->should_pop == 2)
		{
			macexpstackentry_t *mac;
			mac = pop_macro();
			expand_macro(mac);
		}
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		ppy__delete_buffer(b);
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	}

%%
/*
 **************************************************************************
 * Support functions
 **************************************************************************
 */

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#ifndef ppy_wrap
int ppy_wrap(void)
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{
	return 1;
}
#endif


/*
 *-------------------------------------------------------------------------
 * Output newlines or set them as continuations
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 *
 * Input: -1 - Don't count this one, but update local position (see pp_dqs)
 *	   0 - Line-continuation seen and cache output
 *	   1 - Newline seen and flush output
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 *-------------------------------------------------------------------------
 */
static void newline(int dowrite)
{
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	pp_status.line_number++;
	pp_status.char_number = 1;
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	if(dowrite == -1)
		return;

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	ncontinuations++;
	if(dowrite)
	{
		for(;ncontinuations; ncontinuations--)
			put_buffer("\n", 1);
	}
}


/*
 *-------------------------------------------------------------------------
 * Make a number out of an any-base and suffixed string
 *
 * Possible number extensions:
 * - ""		int
 * - "L"	long int
 * - "LL"	long long int
 * - "U"	unsigned int
 * - "UL"	unsigned long int
 * - "ULL"	unsigned long long int
 * - "LU"	unsigned long int
 * - "LLU"	unsigned long long int
 * - "LUL"	invalid
 *
 * FIXME:
 * The sizes of resulting 'int' and 'long' are compiler specific.
 * I depend on sizeof(int) > 2 here (although a relatively safe
 * assumption).
 * Long longs are not yet implemented because this is very compiler
 * specific and I don't want to think too much about the problems.
 *
 *-------------------------------------------------------------------------
 */
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static int make_number(int radix, YYSTYPE *val, const char *str, int len)
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{
	int is_l  = 0;
	int is_ll = 0;
	int is_u  = 0;
	char ext[4];

	ext[3] = '\0';
	ext[2] = toupper(str[len-1]);
	ext[1] = len > 1 ? toupper(str[len-2]) : ' ';
	ext[0] = len > 2 ? toupper(str[len-3]) : ' ';

	if(!strcmp(ext, "LUL"))
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		ppy_error("Invalid constant suffix");
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	else if(!strcmp(ext, "LLU") || !strcmp(ext, "ULL"))
	{
		is_ll++;
		is_u++;
	}
	else if(!strcmp(ext+1, "LU") || !strcmp(ext+1, "UL"))
	{
		is_l++;
		is_u++;
	}
	else if(!strcmp(ext+1, "LL"))
	{
		is_ll++;
	}
	else if(!strcmp(ext+2, "L"))
	{
		is_l++;
	}
	else if(!strcmp(ext+2, "U"))
	{
		is_u++;
	}

	if(is_ll)
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	{
/* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
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#ifdef HAVE_LONG_LONG
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		if (is_u)
		{
			val->ull = strtoull(str, NULL, radix);
			return tULONGLONG;
		}
		else
		{
			val->sll = strtoll(str, NULL, radix);
			return tSLONGLONG;
		}
#else
		pp_internal_error(__FILE__, __LINE__, "long long constants not supported on this platform");
#endif
	}
	else if(is_u && is_l)
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	{
		val->ulong = strtoul(str, NULL, radix);
		return tULONG;
	}
	else if(!is_u && is_l)
	{
		val->slong = strtol(str, NULL, radix);
		return tSLONG;
	}
	else if(is_u && !is_l)
	{
		val->uint = (unsigned int)strtoul(str, NULL, radix);
		return tUINT;
	}

	/* Else it must be an int... */
	val->sint = (int)strtol(str, NULL, radix);
	return tSINT;
}


/*
 *-------------------------------------------------------------------------
 * Macro and define expansion support
 *
 * FIXME: Variable macro arguments.
 *-------------------------------------------------------------------------
 */
static void expand_special(pp_entry_t *ppp)
{
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	const char *dbgtext = "?";
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	static char *buf = NULL;

	assert(ppp->type == def_special);

	if(!strcmp(ppp->ident, "__LINE__"))
	{
		dbgtext = "def_special(__LINE__)";
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		buf = pp_xrealloc(buf, 32);
		sprintf(buf, "%d", pp_status.line_number);
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	}
	else if(!strcmp(ppp->ident, "__FILE__"))
	{
		dbgtext = "def_special(__FILE__)";
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		buf = pp_xrealloc(buf, strlen(pp_status.input) + 3);
		sprintf(buf, "\"%s\"", pp_status.input);
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	}
	else
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		pp_internal_error(__FILE__, __LINE__, "Special macro '%s' not found...\n", ppp->ident);
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	if(pp_flex_debug)
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		fprintf(stderr, "expand_special(%d): %s:%d: '%s' -> '%s'\n",
			macexpstackidx,
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			pp_status.input,
			pp_status.line_number,
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			ppp->ident,
			buf ? buf : "");

	if(buf && buf[0])
	{
		push_buffer(ppp, NULL, NULL, 0);
		yy_scan_string(buf);
	}
}

static void expand_define(pp_entry_t *ppp)
{
	assert(ppp->type == def_define);

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	if(pp_flex_debug)
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		fprintf(stderr, "expand_define(%d): %s:%d: '%s' -> '%s'\n",
			macexpstackidx,
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			pp_status.input,
			pp_status.line_number,
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			ppp->ident,
			ppp->subst.text);
	if(ppp->subst.text && ppp->subst.text[0])
	{
		push_buffer(ppp, NULL, NULL, 0);
		yy_scan_string(ppp->subst.text);
	}
}

static int curdef_idx = 0;
static int curdef_alloc = 0;
static char *curdef_text = NULL;

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static void add_text(const char *str, int len)
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{
	if(len == 0)
		return;
	if(curdef_idx >= curdef_alloc || curdef_alloc - curdef_idx < len)
	{
		curdef_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
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		curdef_text = pp_xrealloc(curdef_text, curdef_alloc * sizeof(curdef_text[0]));
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		if(curdef_alloc > 65536)
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			ppy_warning("Reallocating macro-expansion buffer larger than 64kB");
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	}
	memcpy(&curdef_text[curdef_idx], str, len);
	curdef_idx += len;
}

static mtext_t *add_expand_text(mtext_t *mtp, macexpstackentry_t *mep, int *nnl)
{
	char *cptr;
	char *exp;
	int tag;
	int n;

	if(mtp == NULL)
		return NULL;

	switch(mtp->type)
	{
	case exp_text:
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		if(pp_flex_debug)
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			fprintf(stderr, "add_expand_text: exp_text: '%s'\n", mtp->subst.text);
		add_text(mtp->subst.text, strlen(mtp->subst.text));
		break;

	case exp_stringize:
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		if(pp_flex_debug)
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			fprintf(stderr, "add_expand_text: exp_stringize(%d): '%s'\n",
				mtp->subst.argidx,
				mep->args[mtp->subst.argidx]);
		cptr = mep->args[mtp->subst.argidx];
		add_text("\"", 1);
		while(*cptr)
		{
			if(*cptr == '"' || *cptr == '\\')
				add_text("\\", 1);
			add_text(cptr, 1);
			cptr++;
		}
		add_text("\"", 1);
		break;

	case exp_concat:
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		if(pp_flex_debug)
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			fprintf(stderr, "add_expand_text: exp_concat\n");
		/* Remove trailing whitespace from current expansion text */
		while(curdef_idx)
		{
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			if(isspace(curdef_text[curdef_idx-1] & 0xff))
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				curdef_idx--;
			else
				break;
		}
		/* tag current position and recursively expand the next part */
		tag = curdef_idx;
		mtp = add_expand_text(mtp->next, mep, nnl);

		/* Now get rid of the leading space of the expansion */
		cptr = &curdef_text[tag];
		n = curdef_idx - tag;
		while(n)
		{
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			if(isspace(*cptr & 0xff))
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			{
				cptr++;
				n--;
			}
			else
				break;
		}
		if(cptr != &curdef_text[tag])
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		{
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			memmove(&curdef_text[tag], cptr, n);
			curdef_idx -= (curdef_idx - tag) - n;
		}
		break;

	case exp_subst:
		if((mtp->next && mtp->next->type == exp_concat) || (mtp->prev && mtp->prev->type == exp_concat))
			exp = mep->args[mtp->subst.argidx];
		else
			exp = mep->ppargs[mtp->subst.argidx];
		if(exp)
		{
			add_text(exp, strlen(exp));
			*nnl -= mep->nnls[mtp->subst.argidx];
			cptr = strchr(exp, '\n');
			while(cptr)
			{
				*cptr = ' ';
				cptr = strchr(cptr+1, '\n');
			}
			mep->nnls[mtp->subst.argidx] = 0;
		}
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		if(pp_flex_debug)
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			fprintf(stderr, "add_expand_text: exp_subst(%d): '%s'\n", mtp->subst.argidx, exp);
		break;

	default:
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		pp_internal_error(__FILE__, __LINE__, "Invalid expansion type (%d) in macro expansion\n", mtp->type);
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	}
	return mtp;
}

static void expand_macro(macexpstackentry_t *mep)
{
	mtext_t *mtp;
	int n, k;
	char *cptr;
	int nnl = 0;
	pp_entry_t *ppp = mep->ppp;
	int nargs = mep->nargs;

	assert(ppp->type == def_macro);
	assert(ppp->expanding == 0);

	if((ppp->nargs >= 0 && nargs != ppp->nargs) || (ppp->nargs < 0 && nargs < -ppp->nargs))
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		ppy_error("Too %s macro arguments (%d)", nargs < abs(ppp->nargs) ? "few" : "many", nargs);
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	for(n = 0; n < nargs; n++)
		nnl += mep->nnls[n];

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	if(pp_flex_debug)
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		fprintf(stderr, "expand_macro(%d): %s:%d: '%s'(%d,%d) -> ...\n",
			macexpstackidx,
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			pp_status.input,
			pp_status.line_number,
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			ppp->ident,
			mep->nargs,
			nnl);

	curdef_idx = 0;

	for(mtp = ppp->subst.mtext; mtp; mtp = mtp->next)
	{
		if(!(mtp = add_expand_text(mtp, mep, &nnl)))
			break;
	}

	for(n = 0; n < nnl; n++)
		add_text("\n", 1);

	/* To make sure there is room and termination (see below) */
	add_text(" \0", 2);

	/* Strip trailing whitespace from expansion */
	for(k = curdef_idx, cptr = &curdef_text[curdef_idx-1]; k > 0; k--, cptr--)
	{
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		if(!isspace(*cptr & 0xff))
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			break;
	}

	/*
	 * We must add *one* whitespace to make sure that there
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Francois Gouget committed
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	 * is a token-separation after the expansion.
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	 */
	*(++cptr) = ' ';
	*(++cptr) = '\0';
	k++;

	/* Strip leading whitespace from expansion */
	for(n = 0, cptr = curdef_text; n < k; n++, cptr++)
	{
1102
		if(!isspace(*cptr & 0xff))
1103 1104 1105 1106 1107
			break;
	}

	if(k - n > 0)
	{
1108
		if(pp_flex_debug)
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
			fprintf(stderr, "expand_text: '%s'\n", curdef_text + n);
		push_buffer(ppp, NULL, NULL, 0);
		/*yy_scan_bytes(curdef_text + n, k - n);*/
		yy_scan_string(curdef_text + n);
	}
}

/*
 *-------------------------------------------------------------------------
 * String collection routines
 *-------------------------------------------------------------------------
 */
static void new_string(void)
{
#ifdef DEBUG
	if(strbuf_idx)
1125
		ppy_warning("new_string: strbuf_idx != 0");
1126 1127
#endif
	strbuf_idx = 0;
1128
	str_startline = pp_status.line_number;
1129 1130
}

1131
static void add_string(const char *str, int len)
1132 1133 1134 1135 1136 1137
{
	if(len == 0)
		return;
	if(strbuf_idx >= strbuf_alloc || strbuf_alloc - strbuf_idx < len)
	{
		strbuf_alloc += (len + ALLOCBLOCKSIZE-1) & ~(ALLOCBLOCKSIZE-1);
1138
		strbuffer = pp_xrealloc(strbuffer, strbuf_alloc * sizeof(strbuffer[0]));
1139
		if(strbuf_alloc > 65536)
1140
			ppy_warning("Reallocating string buffer larger than 64kB");
1141 1142 1143 1144 1145 1146 1147
	}
	memcpy(&strbuffer[strbuf_idx], str, len);
	strbuf_idx += len;
}

static char *get_string(void)
{
1148
	char *str = pp_xmalloc(strbuf_idx + 1);
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
	memcpy(str, strbuffer, strbuf_idx);
	str[strbuf_idx] = '\0';
#ifdef DEBUG
	strbuf_idx = 0;
#endif
	return str;
}

static void put_string(void)
{
	put_buffer(strbuffer, strbuf_idx);
#ifdef DEBUG
	strbuf_idx = 0;
#endif
}

static int string_start(void)
{
	return str_startline;
}


/*
 *-------------------------------------------------------------------------
 * Buffer management
 *-------------------------------------------------------------------------
 */
static void push_buffer(pp_entry_t *ppp, char *filename, char *incname, int pop)
{
1178
	if(ppy_debug)
1179 1180
		printf("push_buffer(%d): %p %p %p %d\n", bufferstackidx, ppp, filename, incname, pop);
	if(bufferstackidx >= MAXBUFFERSTACK)
1181
		pp_internal_error(__FILE__, __LINE__, "Buffer stack overflow");
1182 1183 1184 1185

	memset(&bufferstack[bufferstackidx], 0, sizeof(bufferstack[0]));
	bufferstack[bufferstackidx].bufferstate	= YY_CURRENT_BUFFER;
	bufferstack[bufferstackidx].define	= ppp;
1186 1187 1188
	bufferstack[bufferstackidx].line_number	= pp_status.line_number;
	bufferstack[bufferstackidx].char_number	= pp_status.char_number;
	bufferstack[bufferstackidx].if_depth	= pp_get_if_depth();
1189
	bufferstack[bufferstackidx].should_pop	= pop;
1190
	bufferstack[bufferstackidx].filename	= pp_status.input;
1191
	bufferstack[bufferstackidx].ncontinuations	= ncontinuations;
1192
	bufferstack[bufferstackidx].incl		= pp_incl_state;
1193
	bufferstack[bufferstackidx].include_filename	= incname;
1194
	bufferstack[bufferstackidx].pass_data		= pass_data;
1195 1196 1197 1198 1199

	if(ppp)
		ppp->expanding = 1;
	else if(filename)
	{
1200
		/* These will track the ppy_error to the correct file and line */
1201 1202 1203
		pp_status.line_number = 1;
		pp_status.char_number = 1;
		pp_status.input  = filename;
1204 1205 1206
		ncontinuations = 0;
	}
	else if(!pop)
1207
		pp_internal_error(__FILE__, __LINE__, "Pushing buffer without knowing where to go to");
1208 1209 1210 1211 1212 1213
	bufferstackidx++;
}

static bufferstackentry_t *pop_buffer(void)
{
	if(bufferstackidx < 0)
1214
		pp_internal_error(__FILE__, __LINE__, "Bufferstack underflow?");
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224

	if(bufferstackidx == 0)
		return NULL;

	bufferstackidx--;

	if(bufferstack[bufferstackidx].define)
		bufferstack[bufferstackidx].define->expanding = 0;
	else
	{
1225 1226 1227
		pp_status.line_number = bufferstack[bufferstackidx].line_number;
		pp_status.char_number = bufferstack[bufferstackidx].char_number;
		pp_status.input  = bufferstack[bufferstackidx].filename;
1228 1229 1230
		ncontinuations = bufferstack[bufferstackidx].ncontinuations;
		if(!bufferstack[bufferstackidx].should_pop)
		{
1231 1232
			fclose(ppy_in);
			fprintf(ppy_out, "# %d \"%s\" 2\n", pp_status.line_number, pp_status.input);
1233 1234

			/* We have EOF, check the include logic */
1235
			if(pp_incl_state.state == 2 && !pp_incl_state.seen_junk && pp_incl_state.ppp)
1236
			{
1237
				pp_entry_t *ppp = pplookup(pp_incl_state.ppp);
1238 1239
				if(ppp)
				{
1240
					includelogicentry_t *iep = pp_xmalloc(sizeof(includelogicentry_t));
1241 1242 1243
					iep->ppp = ppp;
					ppp->iep = iep;
					iep->filename = bufferstack[bufferstackidx].include_filename;
1244 1245
                                        iep->prev = NULL;
					iep->next = pp_includelogiclist;
1246 1247
					if(iep->next)
						iep->next->prev = iep;
1248 1249 1250
					pp_includelogiclist = iep;
					if(pp_status.debug)
						fprintf(stderr, "pop_buffer: %s:%d: includelogic added, include_ppp='%s', file='%s'\n", pp_status.input, pp_status.line_number, pp_incl_state.ppp, iep->filename);
1251
				}
1252
				else
1253 1254
					free(bufferstack[bufferstackidx].include_filename);
			}
1255
			free(pp_incl_state.ppp);
1256
			pp_incl_state	= bufferstack[bufferstackidx].incl;
1257 1258
			pass_data	= bufferstack[bufferstackidx].pass_data;

1259 1260 1261
		}
	}

1262
	if(ppy_debug)
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272
		printf("pop_buffer(%d): %p %p (%d, %d, %d) %p %d\n",
			bufferstackidx,
			bufferstack[bufferstackidx].bufferstate,
			bufferstack[bufferstackidx].define,
			bufferstack[bufferstackidx].line_number,
			bufferstack[bufferstackidx].char_number,
			bufferstack[bufferstackidx].if_depth,
			bufferstack[bufferstackidx].filename,
			bufferstack[bufferstackidx].should_pop);

1273
        ppy__switch_to_buffer(bufferstack[bufferstackidx].bufferstate);
1274 1275 1276 1277 1278 1279

	if(bufferstack[bufferstackidx].should_pop)
	{
		if(yy_current_state() == pp_macexp)
			macro_add_expansion();
		else
1280
			pp_internal_error(__FILE__, __LINE__, "Pop buffer and state without macro expansion state");
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295
		yy_pop_state();
	}

	return &bufferstack[bufferstackidx];
}


/*
 *-------------------------------------------------------------------------
 * Macro nestng support
 *-------------------------------------------------------------------------
 */
static void push_macro(pp_entry_t *ppp)
{
	if(macexpstackidx >= MAXMACEXPSTACK)
1296
		ppy_error("Too many nested macros");
1297

1298 1299
	macexpstack[macexpstackidx] = pp_xmalloc(sizeof(macexpstack[0][0]));
        memset( macexpstack[macexpstackidx], 0, sizeof(macexpstack[0][0]));
1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311
	macexpstack[macexpstackidx]->ppp = ppp;
	macexpstackidx++;
}

static macexpstackentry_t *top_macro(void)
{
	return macexpstackidx > 0 ? macexpstack[macexpstackidx-1] : NULL;
}

static macexpstackentry_t *pop_macro(void)
{
	if(macexpstackidx <= 0)
1312
		pp_internal_error(__FILE__, __LINE__, "Macro expansion stack underflow\n");
1313 1314 1315 1316 1317 1318 1319 1320 1321
	return macexpstack[--macexpstackidx];
}

static void free_macro(macexpstackentry_t *mep)
{
	int i;

	for(i = 0; i < mep->nargs; i++)
		free(mep->args[i]);
1322 1323 1324
	free(mep->args);
	free(mep->nnls);
	free(mep->curarg);
1325 1326 1327
	free(mep);
}

1328
static void add_text_to_macro(const char *text, int len)
1329 1330 1331 1332 1333
{
	macexpstackentry_t *mep = top_macro();

	assert(mep->ppp->expanding == 0);

1334
	if(mep->curargalloc - mep->curargsize <= len+1)	/* +1 for '\0' */
1335
	{
1336 1337
		mep->curargalloc += (ALLOCBLOCKSIZE > len+1) ? ALLOCBLOCKSIZE : len+1;
		mep->curarg = pp_xrealloc(mep->curarg, mep->curargalloc * sizeof(mep->curarg[0]));
1338
	}
1339
	memcpy(mep->curarg + mep->curargsize, text, len);
1340
	mep->curargsize += len;
1341
	mep->curarg[mep->curargsize] = '\0';
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
}

static void macro_add_arg(int last)
{
	int nnl = 0;
	char *cptr;
	macexpstackentry_t *mep = top_macro();

	assert(mep->ppp->expanding == 0);

1352 1353 1354 1355
	mep->args = pp_xrealloc(mep->args, (mep->nargs+1) * sizeof(mep->args[0]));
	mep->ppargs = pp_xrealloc(mep->ppargs, (mep->nargs+1) * sizeof(mep->ppargs[0]));
	mep->nnls = pp_xrealloc(mep->nnls, (mep->nargs+1) * sizeof(mep->nnls[0]));
	mep->args[mep->nargs] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
	cptr = mep->args[mep->nargs]-1;
	while((cptr = strchr(cptr+1, '\n')))
	{
		nnl++;
	}
	mep->nnls[mep->nargs] = nnl;
	mep->nargs++;
	free(mep->curarg);
	mep->curargalloc = mep->curargsize = 0;
	mep->curarg = NULL;

1367
	if(pp_flex_debug)
1368
		fprintf(stderr, "macro_add_arg: %s:%d: %d -> '%s'\n",
1369 1370
			pp_status.input,
			pp_status.line_number,
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
			mep->nargs-1,
			mep->args[mep->nargs-1]);

	/* Each macro argument must be expanded to cope with stingize */
	if(last || mep->args[mep->nargs-1][0])
	{
		yy_push_state(pp_macexp);
		push_buffer(NULL, NULL, NULL, last ? 2 : 1);
		yy_scan_string(mep->args[mep->nargs-1]);
		/*mep->bufferstackidx = bufferstackidx;	 But not nested! */
	}
}

static void macro_add_expansion(void)
{
	macexpstackentry_t *mep = top_macro();

	assert(mep->ppp->expanding == 0);

1390
	mep->ppargs[mep->nargs-1] = pp_xstrdup(mep->curarg ? mep->curarg : "");
1391 1392 1393 1394
	free(mep->curarg);
	mep->curargalloc = mep->curargsize = 0;
	mep->curarg = NULL;

1395
	if(pp_flex_debug)
1396
		fprintf(stderr, "macro_add_expansion: %s:%d: %d -> '%s'\n",
1397 1398
			pp_status.input,
			pp_status.line_number,
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408
			mep->nargs-1,
			mep->ppargs[mep->nargs-1]);
}


/*
 *-------------------------------------------------------------------------
 * Output management
 *-------------------------------------------------------------------------
 */
1409
static void put_buffer(const char *s, int len)
1410 1411 1412
{
	if(top_macro())
		add_text_to_macro(s, len);
1413 1414
	else {
           if(pass_data)
1415
           fwrite(s, 1, len, ppy_out);
1416
        }
1417 1418 1419 1420 1421 1422 1423 1424
}


/*
 *-------------------------------------------------------------------------
 * Include management
 *-------------------------------------------------------------------------
 */
1425
static int is_c_h_include(char *fname, int quoted)
1426
{
1427
	int sl=strlen(fname);
1428 1429 1430
	if (sl < 2 + 2 * quoted) return 0;
	if ((toupper(fname[sl-1-quoted])!='H') && (toupper(fname[sl-1-quoted])!='C')) return 0;
	if (fname[sl-2-quoted]!='.') return 0;
1431 1432 1433
	return 1;
}

1434
void pp_do_include(char *fname, int type)
1435 1436 1437 1438 1439
{
	char *newpath;
	int n;
	includelogicentry_t *iep;

1440
	for(iep = pp_includelogiclist; iep; iep = iep->next)
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
	{
		if(!strcmp(iep->filename, fname))
		{
			/*
			 * We are done. The file was included before.
			 * If the define was deleted, then this entry would have
			 * been deleted too.
			 */
			return;
		}
	}

	n = strlen(fname);

	if(n <= 2)
1456
		ppy_error("Empty include filename");
1457 1458 1459 1460

	/* Undo the effect of the quotation */
	fname[n-1] = '\0';

1461 1462
	if((ppy_in = pp_open_include(fname+1, type ? pp_status.input : NULL, &newpath)) == NULL)
		ppy_error("Unable to open include file %s", fname+1);
1463 1464 1465

	fname[n-1] = *fname;	/* Redo the quotes */
	push_buffer(NULL, newpath, fname, 0);
1466 1467 1468
	pp_incl_state.seen_junk = 0;
	pp_incl_state.state = 0;
	pp_incl_state.ppp = NULL;
1469
	if (is_c_h_include(newpath, 0)) pass_data=0;
1470 1471
	else pass_data=1;

1472 1473 1474
	if(pp_status.debug)
		fprintf(stderr, "pp_do_include: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d ,pass_data=%d\n",
                        pp_status.input, pp_status.line_number, pp_incl_state.state, pp_incl_state.ppp, pp_incl_state.ifdepth, pass_data);
1475
        ppy__switch_to_buffer(ppy__create_buffer(ppy_in, YY_BUF_SIZE));
1476

1477
	fprintf(ppy_out, "# 1 \"%s\" 1%s\n", newpath, type ? "" : " 3");
1478 1479 1480 1481 1482 1483 1484 1485
}

/*
 *-------------------------------------------------------------------------
 * Push/pop preprocessor ignore state when processing conditionals
 * which are false.
 *-------------------------------------------------------------------------
 */
1486
void pp_push_ignore_state(void)
1487 1488 1489 1490
{
	yy_push_state(pp_ignore);
}

1491
void pp_pop_ignore_state(void)
1492 1493 1494
{
	yy_pop_state();
}