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enable debugging output for bison parser, fix // comments, better error recovery, error out on non-instantiable eleme...

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Original commit message from CVS:
enable debugging output for bison parser, fix // comments, better error recovery, error out on non-instantiable elements (fixes #110758)
This commit is contained in:
Benjamin Otte 2003-04-14 18:33:58 +00:00
parent 3639eab50e
commit 838ffca4fa
3 changed files with 33 additions and 7 deletions
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1
gst/gstparse.h
View file

@ -39,6 +39,7 @@ typedef enum
GST_PARSE_ERROR_NO_SUCH_PROPERTY,
GST_PARSE_ERROR_LINK,
GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
GST_PARSE_ERROR_EMPTY_BIN,
} GstParseError;

37
gst/parse/grammar.y
View file

@ -126,13 +126,22 @@ typedef struct {
# define YYDEBUG 1
#endif
#endif // G_HAVE_ISO_VARARGS
#endif /* G_HAVE_ISO_VARARGS */
#define GST_BIN_MAKE(res, type, chain, assign) G_STMT_START{ \
#define GST_BIN_MAKE(res, type, chainval, assign) G_STMT_START{ \
chain_t *chain = chainval; \
GSList *walk; \
GstBin *bin = (GstBin *) gst_element_factory_make (type, NULL); \
if (!bin) { \
ERROR (GST_PARSE_ERROR_NO_SUCH_ELEMENT, "No bin \"%s\"", type); \
if (!chain) { \
ERROR (GST_PARSE_ERROR_EMPTY_BIN, "Specified empty bin \"%s\", not allowed", type); \
g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
g_slist_free (assign); \
YYERROR; \
} else if (!bin) { \
ERROR (GST_PARSE_ERROR_NO_SUCH_ELEMENT, "No bin \"%s\", omitting...", type); \
g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
g_slist_free (assign); \
res = chain; \
} else { \
walk = chain->elements; \
while (walk) { \
@ -499,8 +508,11 @@ static int yyerror (const char *s);
%%
element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
if (!$$) ERROR (GST_PARSE_ERROR_NO_SUCH_ELEMENT, "No element \"%s\"", $1);
if (!$$)
ERROR (GST_PARSE_ERROR_NO_SUCH_ELEMENT, "No element \"%s\"", $1);
gst_parse_strfree ($1);
if (!$$)
YYERROR;
}
| element ASSIGNMENT { gst_parse_element_set ($2, $1, graph);
$$ = $1;
@ -515,6 +527,16 @@ bin: '{' assignments chain '}' { GST_BIN_MAKE ($$, "thread", $3, $2)
| BINREF assignments chain ')' { GST_BIN_MAKE ($$, $1, $3, $2);
gst_parse_strfree ($1);
}
| '{' assignments '}' { GST_BIN_MAKE ($$, "thread", NULL, $2); }
| '(' assignments '}' { GST_BIN_MAKE ($$, "thread", NULL, $2); }
| BINREF assignments ')' { GST_BIN_MAKE ($$, $1, NULL, $2);
gst_parse_strfree ($1);
}
| '{' assignments error '}' { GST_BIN_MAKE ($$, "thread", NULL, $2); }
| '(' assignments error '}' { GST_BIN_MAKE ($$, "thread", NULL, $2); }
| BINREF assignments error ')' { GST_BIN_MAKE ($$, $1, NULL, $2);
gst_parse_strfree ($1);
}
;
pads: PADREF { $$ = g_slist_prepend (NULL, $1); }
@ -533,6 +555,7 @@ reference: REF { MAKE_REF ($$, $1, NULL); }
linkpart: reference { $$ = $1; }
| pads { MAKE_REF ($$, NULL, $1); }
| /* NOP */ { MAKE_REF ($$, NULL, NULL); }
| linkpart error { $$ = $1; }
;
link: linkpart '!' linkpart { $$ = $1;
@ -544,6 +567,7 @@ link: linkpart '!' linkpart { $$ = $1;
linklist: link { $$ = g_slist_prepend (NULL, $1); }
| link linklist { $$ = g_slist_prepend ($2, $1); }
| linklist error { $$ = $1; }
;
chain: element { $$ = gst_parse_chain_new ();
@ -635,6 +659,7 @@ chain: element { $$ = gst_parse_chain_new ();
g_slist_free ($2);
$$ = $1;
}
| chain error { $$ = $1; }
;
graph: chain { $$ = (graph_t *) graph;
@ -701,7 +726,7 @@ _gst_parse_launch (const gchar *str, GError **error)
dstr = g_strdup (str);
_gst_parse_yy_scan_string (dstr);
#ifdef DEBUG
#ifdef GST_DEBUG_ENABLED
yydebug = 1;
#endif

2
gst/parse/parse.l
View file

@ -22,7 +22,7 @@
# ifdef GST_DEBUG_ENABLED
# define PRINT(a...) GST_DEBUG (GST_CAT_PIPELINE, "flex: "##a)
# endif
#endif // G_HAVE_ISO_VARARGS
#endif /* G_HAVE_ISO_VARARGS */
#define YY_DECL int _gst_parse_yylex (YYSTYPE *lvalp)
%}