moved parser into separate lib

2 files changed, 146 insertions, 0 deletions

diff --git a/plugins/libparser/parser.c b/plugins/libparser/parser.c
new file mode 100644
index 00000000..c49eeb72
--- /dev/null
+++ b/plugins/libparser/parser.c
@@ -0,0 +1,107 @@
+/*
+    DeaDBeeF - ultimate music player for GNU/Linux systems with X11
+    Copyright (C) 2009-2012 Alexey Yakovenko <waker@users.sourceforge.net>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include "parser.h"
+
+// very basic parser, ripped from psynth, optimized, and extended to support
+// quoted strings and extra special chars
+int parser_line;
+
+void
+parser_init (void) {
+    parser_line = 1;
+}
+
+const char *
+skipws (const char *p) {
+    while (*p <= ' ' && *p) {
+        if (*p == '\n') {
+            parser_line++;
+        }
+        p++;
+    }
+    if (!*p) {
+        return NULL;
+    }
+    return p;
+}
+
+const char *
+gettoken (const char *p, char *tok) {
+    const char *c;
+    assert (p);
+    assert (tok);
+    int n = MAX_TOKEN-1;
+    char specialchars[] = "{}();";
+    if (!(p = skipws (p))) {
+        return NULL;
+    }
+    if (*p == '"') {
+        p++;
+        c = p;
+        while (n > 0 && *c && *c != '"') {
+            if (*c == '\n') {
+                parser_line++;
+            }
+            *tok++ = *c++;
+            n--;
+        }
+        if (*c) {
+            c++;
+        }
+        *tok = 0;
+        return c;
+    }
+    if (strchr (specialchars, *p)) {
+        *tok = *p;
+        tok[1] = 0;
+        return p+1;
+    }
+    c = p;
+    while (n > 0 && *c > ' ' && !strchr (specialchars, *c)) {
+        *tok++ = *c++;
+        n--;
+    }
+    *tok = 0;
+    return c;
+}
+
+const char *
+gettoken_warn_eof (const char *p, char *tok) {
+    p = gettoken (p, tok);
+    if (!p) {
+        fprintf (stderr, "parser: unexpected eof at line %d", parser_line);
+    }
+    return p;
+}
+
+const char *
+gettoken_err_eof (const char *p, char *tok) {
+    p = gettoken (p, tok);
+    if (!p) {
+        fprintf (stderr, "parser: unexpected eof at line %d", parser_line);
+        exit (-1);
+    }
+    return p;
+}
+
+
diff --git a/plugins/libparser/parser.h b/plugins/libparser/parser.h
new file mode 100644
index 00000000..b0f95169
--- /dev/null
+++ b/plugins/libparser/parser.h
@@ -0,0 +1,39 @@
+/*
+    DeaDBeeF - ultimate music player for GNU/Linux systems with X11
+    Copyright (C) 2009-2012 Alexey Yakovenko <waker@users.sourceforge.net>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef __PARSER_H
+#define __PARSER_H
+
+#define MAX_TOKEN 256
+extern int parser_line;
+
+void
+parser_init (void);
+
+const char *
+skipws (const char *p);
+
+const char *
+gettoken (const char *p, char *tok);
+
+const char *
+gettoken_warn_eof (const char *p, char *tok);
+
+const char *
+gettoken_err_eof (const char *p, char *tok);
+
+#endif