Added more functionality to Buf, substring, search for characer, and shifting string.

1 files changed, 58 insertions, 0 deletions

diff --git a/buf.c b/buf.c
index c9cf59a..2a64b1c 100644
--- a/buf.c
+++ b/buf.c
@@ -440,4 +440,62 @@ int Buf::getc(int idx, char *c)
 	*c = buf[idx];
 
 	return 0;
+}
+
+int Buf::findc(char c, int *idx)
+{
+	int i=0;
+
+	for (i=0;i<this->cur_size;i++)
+	{
+		if (buf[i] == c)
+		{
+			//found
+			*idx = i;
+			return 1;
+		}
+	}
+
+	//not found
+	return 0;
+}
+
+int Buf::popsubstring(int sz, char **val, int *size)
+{
+	int ret=-1;
+
+	if (sz>this->cur_size)
+	{
+		sz = this->cur_size;
+	}
+
+	*val = (char *)malloc(sz);
+	memcpy(*val,buf,sz);
+	*size = sz;
+	shiftleft(sz);
+	ret = sz;
+
+	return ret;
+}
+
+int Buf::shiftleft(int n)
+{
+	int i=0;
+
+	if ((n>this->cur_size) || (n<0))
+	{
+		//cant shift
+		return -1;
+	}
+	int mvsz = cur_size-n;
+	for (i=0;i<mvsz;i++)
+	{
+		char c = buf[n+i];
+		printf("%c",c);
+		buf[i] = c;
+	}
+	this->cur_size -= n;
+
+	//amount of shifted bytes
+	return n;
 }
\ No newline at end of file