Diff: mylib/StreamFilter/StreamFilter.cpp

Revision:

0:db299c5a18ba

Child:

1:c4cfd136f9c7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mylib/StreamFilter/StreamFilter.cpp	Fri Oct 29 23:17:01 2010 +0000
@@ -0,0 +1,97 @@
+
+#include "StreamFilter.h"
+
+/**
+ * Create.
+ *
+ * @param headtxt Head of a target.
+ * @param tailtxt Tail of a target.
+ */
+StreamFilter::StreamFilter(const char *headtxt, const char *tailtxt)
+        : headcnt(0), tailcnt(0), head(headtxt), tail(tailtxt), content("") {
+}
+
+/**
+ * Dispose.
+ */
+StreamFilter::~StreamFilter() {
+}
+
+/**
+ * Check state of done.
+ *
+ * @return Return true if it done.
+ */
+bool StreamFilter::done() {
+    if ((headcnt == strlen(head)) && (tailcnt == strlen(tail))) {
+        return true;
+    }
+    return false;
+}
+
+/**
+ * Reset state.
+ */
+void StreamFilter::reset() {
+    headcnt = 0;
+    tailcnt = 0;
+    memset(content, 0, sizeof(content));
+}
+
+/**
+ * Push a data to a internal buffer.
+ *
+ * @param c character.
+ */
+void StreamFilter::push(char c) {
+    if (done()) {
+        return;
+    }
+
+    /*
+     * Check a text for the header.
+     */
+    if (headcnt < strlen(head)) {
+        if (c == head[headcnt]) {
+            headcnt++;
+        } else {
+            headcnt = 0;
+        }
+        return;
+    }
+    /*
+     * Check a text for the tailer.
+     */
+    if (tailcnt < strlen(tail)) {
+        if (c == tail[tailcnt]) {
+            tailcnt++;
+            return;
+        } else {
+            tailcnt = 0;
+        }
+    }
+    /*
+     * It's a content.
+     */
+    const int n = strlen(content);
+    if (n < sizeof(content) - 1) {
+        content[n + 0] = c;
+        content[n + 1] = '\0';
+    }
+}
+
+/**
+ * Get a content text.
+ *
+ * @param buf A pointer to a buffer.
+ * @param bufsiz Size of the buffer.
+ *
+ * @return true if it succeed.
+ */
+bool StreamFilter::getContent(char *buf, size_t bufsiz) {
+    if (strlen(content) < bufsiz) {
+        strcpy(buf, content);
+        return true;
+    }
+    return false;
+}