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- An extern statement finishes with the first closing '}' or the first 

outer ';'
- Handle '#error', '#line' and '#pragma' even when in the 'pp_strips',
  'pp_stripe', 'pp_stripp' or 'pp_false' contexts (just like '#if' and
  co).  But still don't issue an error if '#error' is found when in the
  'pp_false' state.
This commit is contained in:
Francois Gouget 2000-03-19 12:44:46 +00:00 committed by Alexandre Julliard
parent b8d1b48736
commit 524bd76997
2 changed files with 37 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/wrc/parser.h
View File

@ -27,6 +27,7 @@ void set_yywf(void);
void set_pp_ignore(int state);
void push_to(int start);
void pop_start(void);
void strip_extern(void);
void strip_til_semicolon(void);
void strip_til_parenthesis(void);

53
tools/wrc/parser.l
View File

@ -75,6 +75,7 @@
/* Set when handling a false #if case */
%x pp_false
/* Set when stripping c-junk */
%x pp_stripe
%x pp_strips
%x pp_stripp
%x pp_stripp_final
@ -134,7 +135,7 @@ static int wbufidx;
static int wbufalloc = 0;
static int want_nl = 0; /* Set when newline needs to go to parser */
static int want_ident = 0; /* Set is #ifdef, #ifndef or defined is seen */
static int stripslevel = 0; /* Count {} during pp_strips mode */
static int stripslevel = 0; /* Count {} during pp_strips/pp_stripe mode */
static int stripplevel = 0; /* Count () during pp_strips mode */
static char *substtext = NULL; /* Holds the substition text while getting a define */
static int cjunk_tagline; /* Where did we start stripping (helps error tracking) */
@ -454,7 +455,7 @@ void add_to_substtext(char *text, int len)
}
/* Conditional handling */
<INITIAL,pp_strips,pp_stripp,pp_false>^{ws}*#{ws}*if{ws}* {
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*if{ws}* {
if(YY_START == pp_false)
{
if(yydebug)
@ -469,7 +470,7 @@ void add_to_substtext(char *text, int len)
return tIF;
}
}
<INITIAL,pp_strips,pp_stripp,pp_false>^{ws}*#{ws}*ifdef{ws}* {
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*ifdef{ws}* {
if(YY_START == pp_false)
{
if(yydebug)
@ -485,7 +486,7 @@ void add_to_substtext(char *text, int len)
return tIFDEF;
}
}
<INITIAL,pp_strips,pp_stripp,pp_false>^{ws}*#{ws}*ifndef{ws}* {
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*ifndef{ws}* {
if(YY_START == pp_false)
{
if(yydebug)
@ -501,7 +502,7 @@ void add_to_substtext(char *text, int len)
return tIFNDEF;
}
}
<INITIAL,pp_strips,pp_stripp,pp_false>^{ws}*#{ws}*elif{ws}* {
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*elif{ws}* {
if(!isnevertrue_if())
{
push_to(INITIAL);
@ -513,7 +514,7 @@ void add_to_substtext(char *text, int len)
if(yydebug)
printf("(%d)#elif ignored\n", line_number);
}
<INITIAL,pp_strips,pp_stripp,pp_false>^{ws}*#{ws}*else{ws}* {
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*else{ws}* {
if(!isnevertrue_if())
{
push_to(INITIAL);
@ -523,7 +524,7 @@ void add_to_substtext(char *text, int len)
if(yydebug)
printf("(%d)#else ignored\n", line_number);
}
<INITIAL,pp_strips,pp_stripp,pp_false>^{ws}*#{ws}*endif{ws}* {
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*endif{ws}* {
if(!isnevertrue_if())
{
want_nl = 1;
@ -538,12 +539,16 @@ void add_to_substtext(char *text, int len)
}
/* The error directive */
^{ws}*#{ws}*error{ws}* push_to(pp_error);
<pp_error>[^\n]* yyerror("Error directive: %s", yytext);
<INITIAL,pp_strips,pp_stripe,pp_stripp>^{ws}*#{ws}*error{ws}* push_to(pp_error);
<pp_error>[^\n]* yyerror("Error directive: %s", yytext);
<pp_false>^{ws}*#{ws}*error[^\n]* {
if(yydebug)
printf("(%d)#error ignored\n", line_number);
}
/* preprocessor junk */
^{ws}*#{ws}*pragma[^\n]* ; /* Ignore #pragma */
^{ws}*#{ws}*line[^\n]* ; /* Ignore #line */
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*pragma[^\n]* ; /* Ignore #pragma */
<INITIAL,pp_strips,pp_stripe,pp_stripp,pp_false>^{ws}*#{ws}*line[^\n]* ; /* Ignore #line */
/* We'll get an error on malformed #xxx statements
* by not recognising '#' at all. This helps tracking
* preprocessor errors.
@ -556,6 +561,15 @@ void add_to_substtext(char *text, int len)
<pp_strips>\/[^*\n] ; /* To catch comments */
<pp_strips>[^\{\};\n#/]* ; /* Ignore rest */
<pp_stripe>\{ stripslevel++;
<pp_stripe>\} {
stripslevel--;
if(!stripslevel) pop_start();
}
<pp_stripe>; if(!stripslevel) pop_start();
<pp_stripe>\/[^*\n] ; /* To catch comments */
<pp_stripe>[^\{\};\n#/]* ; /* Ignore rest */
<pp_stripp>\( stripplevel++;
<pp_stripp>\) {
stripplevel--;
@ -781,7 +795,7 @@ L\" {
<yyrcd>\n line_number++; char_number = 1;
<yyrcd>. yyerror("Malformed data-line");
<INITIAL,pp_ignore,pp_def_s,pp_strips,pp_stripp>"/*" push_to(comment); /* Eat comment */
<INITIAL,pp_ignore,pp_def_s,pp_strips,pp_stripe,pp_stripp>"/*" push_to(comment); /* Eat comment */
<comment>[^*\n]* ;
<comment>"*"+[^*/\n]* ;
<comment>\n line_number++; char_number = 1;
@ -790,7 +804,7 @@ L\" {
;[^\n]* ; /* Eat comment */
<INITIAL,pp_ignore,pp_def_s>"//"[^\n]* ; /* Eat comment */
<INITIAL,yywf,pp_false,pp_strips,pp_stripp>\n {
<INITIAL,yywf,pp_false,pp_strips,pp_stripe,pp_stripp>\n {
if(YY_START == yywf)
pop_start();
line_number++;
@ -808,7 +822,7 @@ L\" {
YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
if(!pop_buffer())
{
if(YY_START == pp_strips || YY_START == pp_stripp || YY_START == pp_stripp_final)
if(YY_START == pp_strips || YY_START == pp_stripe || YY_START == pp_stripp || YY_START == pp_stripp_final)
yyerror("Unexpected end of file during c-junk scanning (started at %d)", cjunk_tagline);
else
yyterminate();
@ -823,8 +837,8 @@ L\" {
line_number++;
char_number = 1;
}
yywarning("Unmatched text '%c' (0x%02x) YY_START=%d",
isprint(*yytext) ? *yytext : '.', *yytext, YY_START);
yywarning("Unmatched text '%c' (0x%02x) YY_START=%d stripslevel=%d",
isprint(*yytext) ? *yytext : '.', *yytext, YY_START,stripslevel);
}
%%
@ -958,6 +972,12 @@ void set_pp_ignore(int state)
}
/* Called from the parser to kill c-junk */
void strip_extern(void)
{
cjunk_tagline = line_number;
push_to(pp_stripe);
}
void strip_til_semicolon(void)
{
cjunk_tagline = line_number;
@ -971,4 +991,3 @@ void strip_til_parenthesis(void)
push_to(pp_stripp);
}