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Cleanup lexer a bit

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This commit is contained in:
Dave Davenport 2017-03-13 10:49:33 +01:00
parent be036f086d
commit 1ca69704db
2 changed files with 42 additions and 22 deletions
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62
lexer/theme-lexer.l
View file

@ -8,6 +8,8 @@
#include "rofi.h"
#include "lexer/theme-parser.h"
#define LOG_DOMAIN "Parser"
int last_state = 0;
/**
@ -32,13 +34,15 @@ typedef struct _ParseObject {
char *filename;
/** Length of string */
int str_len;
size_t str_len;
/** String */
const char *input_str;
/** Position in file */
YYLTYPE location;
} ParseObject;
GList *prev_imported_files = NULL;
GQueue *file_queue = NULL;
GQueue *queue = NULL;
@ -125,7 +129,7 @@ INCLUDE "@import"
%x INCLUDE
%x PROPERTIES
%x NAMESTR
%x ENTRY
%x SECTION
%x DEFAULTS
%%
@ -138,6 +142,11 @@ if ( queue == NULL ){
}
%}
/**
* General code for handling comments.
* Both C and C++ style comments, including nexting.
*/
<*>"//" {
int c;
while ((c = input()) != 0){
@ -180,8 +189,10 @@ if ( queue == NULL ){
g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) );
BEGIN(INCLUDE);
}
/** Skip all whitespace */
<INCLUDE>{WHITESPACE} {}
/** Parse path. Last element in this INCLUDE */
<INCLUDE>\"{STRING}\" {
yytext[yyleng-1] = '\0';
ParseObject *top = g_queue_peek_head ( file_queue );
@ -195,6 +206,7 @@ if ( queue == NULL ){
filename = path;
g_free ( basedir );
}
g_log ( LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Parsing file: '%s'", filename );
FILE *f = fopen ( filename, "rb" );
if ( f ) {
top->location = *yylloc;
@ -218,47 +230,59 @@ if ( queue == NULL ){
// Pop out of include. */
BEGIN(GPOINTER_TO_INT(g_queue_pop_head ( queue )));
}
/** Everythin not yet parsed is an error. */
<INCLUDE>. {
return T_ERROR_INCLUDE;
}
/**
* END INCLUDES
*/
/**
* Handle defaults: * { ... }
*/
<INITIAL>{ASTERIX} {
g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) );
BEGIN(DEFAULTS);
return PDEFAULTS;
}
/** Skip all whitespace */
<DEFAULTS>{WHITESPACE} {}
<DEFAULTS>"\{" {
g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) );
BEGIN(ENTRY);
BEGIN(SECTION);
return BOPEN;
}
/** Everythin not yet parsed is an error. */
<DEFAULTS>. {
return T_ERROR_DEFAULTS;
}
/* Go into parsing an entry */
<INITIAL>"#" { g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) ); BEGIN(NAMESTR);return NAME_PREFIX;}
/* Go into parsing an section*/
<NAMESTR>"\{" {
g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) );
BEGIN(ENTRY);
BEGIN(SECTION);
return BOPEN;
}
/* Pop out of parsing an entry. */
<ENTRY>"\}" {
/* Pop out of parsing an section. */
<SECTION>"\}" {
g_queue_pop_head ( queue );
BEGIN(GPOINTER_TO_INT(g_queue_pop_head ( queue )));
return BCLOSE;
}
<INITIAL>"#" { g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) ); BEGIN(NAMESTR);return NAME_PREFIX;}
<NAMESTR>\.|{WHITESPACE} { return NSEP; }
<ENTRY>{WORD} { yylval->sval = g_strdup(yytext); return N_STRING;}
<SECTION>{WORD} { yylval->sval = g_strdup(yytext); return N_STRING;}
<NAMESTR>{WORD} { yylval->sval = g_strdup(yytext); return NAME_ELEMENT;}
/* After Namestr/Classstr we want to go to state str, then to { */
/*<NAMESTR>{WHITESPACE} { BEGIN(GPOINTER_TO_INT (g_queue_pop_head ( queue )));}*/
<INITIAL,ENTRY>{WHITESPACE}+ ; // ignore all whitespace
/* After Namestr/Classstr we want to go to state str, then to { */
<INITIAL,SECTION>{WHITESPACE}+ ; // ignore all whitespace
<PROPERTIES>{WHITESPACE}+ ; // ignore all whitespace
<INITIAL,ENTRY>":" { g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) ); BEGIN(PROPERTIES); return PSEP; }
<SECTION>":" { g_queue_push_head ( queue, GINT_TO_POINTER (YY_START) ); BEGIN(PROPERTIES); return PSEP; }
<PROPERTIES>";" { BEGIN(GPOINTER_TO_INT ( g_queue_pop_head ( queue ))); return PCLOSE;}
<PROPERTIES>(true|false) { yylval->bval= g_strcmp0(yytext, "true") == 0; return T_BOOLEAN;}
<PROPERTIES>{PNNUMBER}+ { yylval->ival = (int)g_ascii_strtoll(yytext, NULL, 10); return T_INT;}
@ -453,8 +477,8 @@ if ( queue == NULL ){
<INITIAL>. {
return T_ERROR;
}
<ENTRY>. {
return T_ERROR_ENTRY;
<SECTION>. {
return T_ERROR_SECTION;
}
<PROPERTIES>. {
return T_ERROR_PROPERTY;
@ -462,12 +486,6 @@ if ( queue == NULL ){
<NAMESTR>. {
return T_ERROR_NAMESTRING;
}
<DEFAULTS>. {
return T_ERROR_DEFAULTS;
}
<INCLUDE>. {
return T_ERROR_INCLUDE;
}
%%
gboolean rofi_theme_parse_file ( const char *file )
@ -491,6 +509,7 @@ gboolean rofi_theme_parse_file ( const char *file )
po->filein = yyin;
current = po;
g_queue_push_head ( file_queue, po );
g_log ( LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Parsing top file: '%s'", filename );
int parser_retv = yyparse ( file );
yylex_destroy ();
@ -516,6 +535,7 @@ gboolean rofi_theme_parse_string ( const char *string )
po->str_len = strlen(string);
current = po;
g_queue_push_head ( file_queue, po );
g_log ( LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "Parsing string: '%s'", string );
int parser_retv = yyparse ( string );
yylex_destroy ();

2
lexer/theme-parser.y
View file

@ -35,7 +35,7 @@ int yylex (YYSTYPE *, YYLTYPE *);
%token <ival> T_END 0 "end of file"
%token <ival> T_ERROR 1 "error from file parser"
%token <ival> T_ERROR_PROPERTY 2 "invalid property value"
%token <ival> T_ERROR_ENTRY 3 "invalid property name"
%token <ival> T_ERROR_SECTION 3 "invalid property name"
%token <ival> T_ERROR_NAMESTRING 4 "invalid element name"
%token <ival> T_ERROR_DEFAULTS 5 "invalid defaults name"
%token <ival> T_ERROR_INCLUDE 6 "invalid import value"