Factor class Pcre into its own file.

[cydia.git] / UICaboodle / PerlCompatibleRegEx.hpp

diff --git a/UICaboodle/PerlCompatibleRegEx.hpp b/UICaboodle/PerlCompatibleRegEx.hpp
new file mode 100644 (file)
index 0000000..f91c338
--- /dev/null
+++ b/UICaboodle/PerlCompatibleRegEx.hpp
@@ -0,0 +1,117 @@
+/* Cydia - iPhone UIKit Front-End for Debian APT
+ * Copyright (C) 2008-2011  Jay Freeman (saurik)
+*/
+
+/* Modified BSD License {{{ */
+/*
+ *        Redistribution and use in source and binary
+ * forms, with or without modification, are permitted
+ * provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the
+ *    above copyright notice, this list of conditions
+ *    and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the
+ *    above copyright notice, this list of conditions
+ *    and the following disclaimer in the documentation
+ *    and/or other materials provided with the
+ *    distribution.
+ * 3. The name of the author may not be used to endorse
+ *    or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/* }}} */
+
+#ifndef Cydia_PerlCompatibleRegEx_HPP
+#define Cydia_PerlCompatibleRegEx_HPP
+
+#include <pcre.h>
+
+#include "UICaboodle/NSString-UICaboodle.h"
+
+class Pcre {
+  private:
+    pcre *code_;
+    pcre_extra *study_;
+    int capture_;
+    int *matches_;
+    const char *data_;
+
+  public:
+    Pcre() :
+        code_(NULL),
+        study_(NULL)
+    {
+    }
+
+    Pcre(const char *regex) :
+        code_(NULL),
+        study_(NULL)
+    {
+        this->operator =(regex);
+    }
+
+    void operator =(const char *regex) {
+        _assert(code_ == NULL);
+
+        const char *error;
+        int offset;
+        code_ = pcre_compile(regex, 0, &error, &offset, NULL);
+
+        if (code_ == NULL) {
+            fprintf(stderr, "%d:%s\n", offset, error);
+            _assert(false);
+        }
+
+        pcre_fullinfo(code_, study_, PCRE_INFO_CAPTURECOUNT, &capture_);
+        matches_ = new int[(capture_ + 1) * 3];
+    }
+
+    ~Pcre() {
+        pcre_free(code_);
+        delete matches_;
+    }
+
+    NSString *operator [](size_t match) const {
+        return [NSString stringWithUTF8Bytes:(data_ + matches_[match * 2]) length:(matches_[match * 2 + 1] - matches_[match * 2])];
+    }
+
+    _finline bool operator ()(NSString *data) {
+        // XXX: length is for characters, not for bytes
+        return operator ()([data UTF8String], [data length]);
+    }
+
+    _finline bool operator ()(const char *data) {
+        return operator ()(data, strlen(data));
+    }
+
+    bool operator ()(const char *data, size_t size) {
+        data_ = data;
+        return pcre_exec(code_, study_, data, size, 0, 0, matches_, (capture_ + 1) * 3) >= 0;
+    }
+
+    NSString *operator ->*(NSString *format) const {
+        id values[capture_];
+        for (int i(0); i != capture_; ++i)
+            values[i] = this->operator [](i + 1);
+
+        return [[[NSString alloc] initWithFormat:format arguments:reinterpret_cast<va_list>(values)] autorelease];
+    }
+};
+
+#endif//Cydia_PerlCompatibleRegEx_HPP