Author: michael
Date: Fri May 1 16:38:07 2009
New Revision: 18725
Log:
av_get_token()
based on a patch by Stefano Sabatini
Added:
trunk/libavfilter/parseutils.c
trunk/libavfilter/parseutils.h
Added: trunk/libavfilter/parseutils.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ trunk/libavfilter/parseutils.c Fri May 1 16:38:07 2009 (r18725)
@@ -0,0 +1,110 @@
+/*
+ * copyright (c) 2009 Stefano Sabatini
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file libavfilter/parseutils.c
+ * parsing utils
+ */
+
+#include <string.h>
+#include "libavutil/avutil.h"
+#include "parseutils.h"
+
+#define WHITESPACES " \n\t"
+
+char *av_get_token(const char **buf, const char *term)
+{
+ char *out = av_malloc(strlen(*buf) + 1);
+ char *ret= out, *end= out;
+ const char *p = *buf;
+ p += strspn(p, WHITESPACES);
+
+ while(*p && !strspn(p, term)) {
+ char c = *p++;
+ if(c == '\\' && *p){
+ *out++ = *p++;
+ end= out;
+ }else if(c == '\''){
+ while(*p && *p != '\'')
+ *out++ = *p++;
+ if(*p){
+ p++;
+ end= out;
+ }
+ }else{
+ *out++ = c;
+ }
+ }
+
+ do{
+ *out-- = 0;
+ }while(out >= end && strspn(out, WHITESPACES));
+
+ *buf = p;
+
+ return ret;
+}
+
+#ifdef TEST
+
+#undef printf
+
+int main()
+{
+ int i;
+
+ const char *strings[] = {
+ "''",
+ "",
+ ":",
+ "\\",
+ "'",
+ " '' :",
+ " '' '' :",
+ "foo '' :",
+ "'foo'",
+ "foo ",
+ "foo\\",
+ "foo': blah:blah",
+ "foo\\: blah:blah",
+ "foo\'",
+ "'foo : ' :blahblah",
+ "\\ :blah",
+ " foo",
+ " foo ",
+ " foo \\ ",
+ "foo ':blah",
+ " foo bar : blahblah",
+ "\\f\\o\\o",
+ "'foo : \\ \\ ' : blahblah",
+ "'\\fo\\o:': blahblah",
+ "\\'fo\\o\\:': foo ' :blahblah"
+ };
+
+ for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
+ const char *p= strings[i];
+ printf("|%s|", p);
+ printf(" -> |%s|", av_get_token(&p, ":"));
+ printf(" + |%s|\n", p);
+ }
+
+ return 0;
+}
+
+#endif
Added: trunk/libavfilter/parseutils.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ trunk/libavfilter/parseutils.h Fri May 1 16:38:07 2009 (r18725)
@@ -0,0 +1,43 @@
+/*
+ * copyright (c) 2009 Stefano Sabatini
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file libavfilter/parseutils.h
+ * parsing utils
+ */
+
+#ifndef AVFILTER_PARSEUTILS_H
+#define AVFILTER_PARSEUTILS_H
+
+/**
+ * Unescapes the given string until a non escaped terminating char,
+ * and returns the token corresponding to the unescaped string.
+ *
+ * The normal \ and ' escaping is supported. Leading and trailing
+ * whitespaces are removed.
+ *
+ * @param term a 0-terminated list of terminating chars
+ * @param buf the buffer to parse, buf will be updated to point to the
+ * terminating char
+ * @return the malloced unescaped string, which must be av_freed by
+ * the user
+ */
+char *av_get_token(const char **buf, const char *term);
+
+#endif /* AVFILTER_PARSEUTILS_H */
