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135 lines
3 KiB
Plaintext
135 lines
3 KiB
Plaintext
%{
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#include <math.h>
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#include <ctype.h>
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#include <string.h>
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#include "../gst_private.h"
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#include "types.h"
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#include "../gstinfo.h"
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#include "../gsturi.h"
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#include "grammar.tab.h"
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#ifdef G_HAVE_ISO_VARARGS
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#define PRINT(...) GST_CAT_DEBUG (GST_CAT_PIPELINE, "flex: "__VA_ARGS__)
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define PRINT(args...) GST_CAT_DEBUG (GST_CAT_PIPELINE, "flex: "##args)
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#else
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#define PRINT(args...)
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#endif
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#define YY_DECL int _gst_parse_yylex (YYSTYPE *lvalp)
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%}
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_operator [(){}.:!,;=]
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_identifier [[:alpha:]][[:alnum:]\-_%]*
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_char ("\\".)|([^[:space:]])
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_string {_char}+|("\""([^\"]|"\\\"")*"\"")|("'"([^']|"\\\"")*"'")
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_comma [[:space:]]*","[[:space:]]*
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_assign [[:space:]]*"="[[:space:]]*
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_protocol [[:alpha:]][[:alnum:]+-\.]*
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_url {_protocol}"://"{_string}|["."{_identifier}]?"/"{_string}
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/* we must do this here, because nearly everything matches a {_string} */
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_assignment {_identifier}{_assign}{_string}
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/* get pad/element references and stuff with dots right */
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_padref "."{_identifier}
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_ref {_identifier}"."{_identifier}?
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_binref {_identifier}[[:space:]]*"."[[:space:]]*"("
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/* links */
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_capschar ("\\".)|([^[:space:]\;!\.\,\(\)\]\[])
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_capsstring {_capschar}+|("\""([^\"]|"\\\"")*"\"")|("'"([^']|"\\\"")*"'")
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_mimetype ({_capschar}+"/"{_capschar}+)|("\""([^\"]|"\\\"")*"\"")|("'"([^']|"\\\"")*"'")
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_caps {_mimetype}(","[^!]|{_capsstring})*
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_link ("!"[[:space:]]*{_caps}([[:space:]]*";"[[:space:]]*{_caps})*[[:space:]]*"!")|("!")
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%x value
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%option noyywrap
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%option nounput
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%%
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{_assignment} {
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/* "=" */
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PRINT ("ASSIGNMENT: %s\n", yytext);
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lvalp->s = gst_parse_strdup (yytext);
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BEGIN (INITIAL);
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return ASSIGNMENT;
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}
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{_padref} {
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yytext++;
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PRINT ("PADREF: %s\n", yytext);
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lvalp->s = gst_parse_strdup (yytext);
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BEGIN (INITIAL);
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return PADREF;
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}
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{_ref} {
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PRINT ("REF: %s\n", yytext);
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lvalp->s = gst_parse_strdup (yytext);
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BEGIN (INITIAL);
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return REF;
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}
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{_binref} {
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gchar *pos = yytext;
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while (!g_ascii_isspace (*pos) && (*pos != '.')) pos++;
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*pos = '\0';
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PRINT ("BINREF: %s\n", yytext);
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lvalp->s = gst_parse_strdup (yytext);
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BEGIN (INITIAL);
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return BINREF;
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}
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{_identifier} {
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PRINT ("IDENTIFIER: %s\n", yytext);
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lvalp->s = gst_parse_strdup (yytext);
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BEGIN (INITIAL);
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return IDENTIFIER;
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}
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{_link} {
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gchar *c = yytext;
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PRINT ("LINK: %s\n", yytext);
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c++;
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if (*c) {
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while (g_ascii_isspace (*c)) c++;
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c = lvalp->s = gst_parse_strdup (c);
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while (*c) c++;
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g_assert (*--c == '!');
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while (g_ascii_isspace (*--c));
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*++c = '\0';
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} else {
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lvalp->s = NULL;
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}
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BEGIN (INITIAL);
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return LINK;
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}
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{_url} {
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PRINT ("URL: %s\n", yytext);
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if (gst_uri_is_valid (yytext)) {
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lvalp->s = g_strdup (yytext);
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} else {
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lvalp->s = gst_uri_construct ("file", yytext);
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}
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gst_parse_unescape (lvalp->s);
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BEGIN (INITIAL);
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return PARSE_URL;
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}
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{_operator} { PRINT ("OPERATOR: [%s]\n", yytext); return *yytext; }
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[[:space:]]+ { PRINT ("SPACE: [%s]\n", yytext); }
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. {
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printf ("???: %s\n", yytext);
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return *yytext;
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}
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%%
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