gstreamer/gst/parse/parse.l

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%{
#include <math.h>
#include <ctype.h>
#include <string.h>
#include "types.h"
#include <grammar.tab.h>
#ifdef G_HAVE_ISO_VARARGS
#ifdef DEBUG
# define PRINT(...) printf(__VAR_ARGS__)
#else
#define PRINT(...)
#endif
#elif defined(G_HAVE_GNUC_VARARGS)
#ifdef DEBUG
# define PRINT(a...) printf(##a)
#else
#define PRINT(a...)
#endif
#endif
#define CHAR(x) PRINT ("char: %c\n", *yytext); return *yytext;
#define YY_DECL int _gst_parse_yylex (YYSTYPE *lvalp)
#define YY_NO_UNPUT
%}
_integer [-+]?[[:digit:]]+
_double [-+]?[[:digit:]]+"."*[[:digit:]]*
_number {_integer}|{_double}
_boolean "true"|"false"|"TRUE"|"FALSE"
_identifier [[:alpha:]][[:alnum:]\-_%:]*
_char ([^[:space:]])|("\\".)
_string {_char}+|("\""([^\"]|"\\\"")*"\"")
_comma [[:space:]]*","[[:space:]]*
_assign [[:space:]]*"="[[:space:]]*
_caps_type_string "fourcc"|"string"
_caps_type_double "float"
_caps_string {_string}{_assign}{_caps_type_string}[[:space:]]+{_string}
_caps_int {_string}{_assign}"int"[[:space:]]+{_integer}
_caps_double {_string}{_assign}{_caps_type_double}[[:space:]]+{_double}
_caps_boolean {_string}{_assign}"boolean"[[:space:]]+{_boolean}
_caps_pair {_caps_string}|{_caps_int}|{_caps_double}|{_caps_boolean}
_caps {_string}({_comma}{_caps_pair})*
_llink ({_identifier}\.)?{_identifier}!
_rlink !({_identifier}\.)?{_identifier}
_blink ({_identifier}\.)?{_identifier}!({_identifier}\.)?{_identifier}
_flink ({_identifier}\.)?{_identifier}!{_caps}!({_identifier}\.)?{_identifier}
%x value
%option noyywrap
%%
<value>{
{_integer} {
PRINT ("An integer: %s (%d)\n", yytext,
atoi (yytext));
lvalp->v = g_new0 (GValue, 1);
g_value_init (lvalp->v, G_TYPE_INT);
g_value_set_int (lvalp->v, atoi (yytext));
BEGIN (INITIAL);
return VALUE;
}
{_double} {
PRINT ("A double: %s (%g)\n", yytext, atof (yytext));
lvalp->v = g_new0 (GValue, 1);
g_value_init (lvalp->v, G_TYPE_DOUBLE);
g_value_set_double (lvalp->v, atof (yytext));
BEGIN (INITIAL);
return VALUE;
}
{_boolean} {
PRINT ("A boolean: %s (%d)\n", yytext, tolower (*yytext) == 't' ? 1 : 0);
lvalp->v = g_new0 (GValue, 1);
g_value_init (lvalp->v, G_TYPE_BOOLEAN);
g_value_set_boolean (lvalp->v, tolower (*yytext) == 't' ? TRUE : FALSE);
BEGIN (INITIAL);
return VALUE;
}
{_string} {
if (*yytext == '"') {
yytext++;
*(yytext + strlen (yytext) - 1) = '\0';
}
_gst_parse_unescape (yytext);
PRINT ("A string: \"%s\"\n", yytext);
lvalp->v = g_new0 (GValue, 1);
g_value_init (lvalp->v, G_TYPE_STRING);
g_value_set_string (lvalp->v, yytext);
BEGIN (INITIAL);
return VALUE;
}
[[:space:]]+ { /* PRINT ("space: [%s]\n", yytext); */ }
}
{_llink} {
gchar *d1, *q;
lvalp->c = g_new0 (link_t, 1);
PRINT ("An link: %s\n", yytext);
q = strchr (yytext, '!');
d1 = strchr (yytext, '.');
if (d1) {
lvalp->c->src_name = g_strndup (yytext, d1 - yytext);
lvalp->c->src_pads = g_list_append (lvalp->c->src_pads, g_strndup (d1 + 1, q - d1 - 1));
} else {
lvalp->c->src_pads = g_list_append (lvalp->c->src_pads, g_strndup (yytext, q - yytext));
}
return LINK;
}
{_rlink} {
gchar *d2;
lvalp->c = g_new0 (link_t, 1);
PRINT ("An rlink: %s\n", yytext);
d2 = strchr (yytext, '.');
if (d2) {
lvalp->c->sink_name = g_strndup (yytext + 1, d2 - yytext - 1);
lvalp->c->sink_pads = g_list_append (lvalp->c->sink_pads, g_strdup (d2 + 1));
} else {
lvalp->c->sink_pads = g_list_append (lvalp->c->sink_pads, g_strdup (yytext + 1));
}
return LINK;
}
{_blink} {
gchar *d1, *d2, *q;
lvalp->c = g_new0 (link_t, 1);
PRINT ("A blink: %s\n", yytext);
q = strchr (yytext, '!');
d1 = strchr (yytext, '.');
d2 = strchr (q, '.');
if (d1 && d1 < q) {
lvalp->c->src_name = g_strndup (yytext, d1 - yytext);
lvalp->c->src_pads = g_list_append (lvalp->c->src_pads, g_strndup (d1 + 1, q - d1 - 1));
} else {
lvalp->c->src_pads = g_list_append (lvalp->c->src_pads, g_strndup (yytext, q - yytext));
}
if (d2) {
lvalp->c->sink_name = g_strndup (q + 1, d2 - q - 1);
lvalp->c->sink_pads = g_list_append (lvalp->c->sink_pads, g_strdup (d2 + 1));
} else {
lvalp->c->sink_pads = g_list_append (lvalp->c->sink_pads, g_strdup (q + 1));
}
return BLINK;
}
{_flink} {
gchar *d1, *d2, *q1, *q2, *a1, *m1;
gchar *mime;
GstProps *props;
lvalp->c = g_new0 (link_t, 1);
PRINT ("An flink: %s\n", yytext);
q1 = strchr (yytext, '!');
d1 = strchr (yytext, '.');
q2 = strchr (q1+1, '!');
d2 = strchr (q2, '.');
if (d1 && d1 < q1) {
lvalp->c->src_name = g_strndup (yytext, d1 - yytext);
lvalp->c->src_pads = g_list_append (lvalp->c->src_pads, g_strndup (d1 + 1, q1 - d1 - 1));
} else {
lvalp->c->src_pads = g_list_append (lvalp->c->src_pads, g_strndup (yytext, q1 - yytext));
}
if (d2) {
lvalp->c->sink_name = g_strndup (q2 + 1, d2 - q2 - 1);
lvalp->c->sink_pads = g_list_append (lvalp->c->sink_pads, g_strdup (d2 + 1));
} else {
lvalp->c->sink_pads = g_list_append (lvalp->c->sink_pads, g_strdup (q2 + 1));
}
/* parse mime type */
m1 = strchr (q1 + 1, ',');
mime = g_strndup (q1 + 1, m1 - q1 - 1);
props = gst_props_empty_new ();
a1 = strchr (m1 + 1, ',');
if (a1 == NULL)
a1 = q2;
while (a1 && a1 <= q2) {
gchar *key, *t, *v;
gchar *k1, *k2;
GstPropsEntry *entry = NULL;
k1 = strchr (m1, '=');
key = g_strstrip (g_strndup (m1 + 1, k1 - m1 -1));
k1++;
while (g_ascii_isspace (*k1)) k1++;
k2 = strchr (k1, ' ');
t = g_strstrip (g_strndup (k1, k2 - k1));
while (g_ascii_isspace (*k2)) k2++;
v = g_strstrip (g_strndup (k2, a1 - k2));
if (!strcmp (t, "string")) {
entry = gst_props_entry_new (key, GST_PROPS_STRING (v));
}
else if (!strcmp (t, "fourcc")) {
entry = gst_props_entry_new (key, GST_PROPS_FOURCC (GST_STR_FOURCC(v)));
}
else if (!strcmp (t, "float")) {
gfloat f;
sscanf (v, "%f", &f);
entry = gst_props_entry_new (key, GST_PROPS_FLOAT (f));
}
else if (!strcmp (t, "int")) {
gint i;
sscanf (v, "%d", &i);
entry = gst_props_entry_new (key, GST_PROPS_INT (i));
}
else if (!strcmp (t, "boolean")) {
gboolean b;
b = (!strcmp (v, "true") || ! strcmp (v, "TRUE"));
entry = gst_props_entry_new (key, GST_PROPS_BOOLEAN (b));
}
gst_props_add_entry (props, entry);
m1 = a1;
if (a1 < q2) {
a1 = strchr (m1 + 1, ',');
if (a1 == NULL)
a1 = q2;
}
else
break;
}
lvalp->c->caps = gst_caps_new ("parse_caps", mime, props);
return FLINK;
}
{_identifier} {
PRINT ("An identifier: %s\n", yytext);
lvalp->s = g_strdup (yytext);
return IDENTIFIER;
}
"=" { BEGIN (value); CHAR ('='); }
"@" { CHAR ('@'); }
"." { CHAR ('.'); }
"," { CHAR (','); }
"{" { CHAR ('{'); }
"}" { CHAR ('}'); }
"[" { CHAR ('['); }
"]" { CHAR (']'); }
"(" { CHAR ('('); }
")" { CHAR (')'); }
"!" { CHAR ('!'); }
"+" { CHAR ('+'); }
[[:space:]]+ { PRINT ("space: [%s]\n", yytext); }
. {
printf ("unknown: %s\n", yytext);
return *yytext;
}
%%