Adding ranges and cfstring_find

src/cfwrange.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2012, Jos Kuijpers <jos@kuijpersvof.nl>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+
+#include "cfwrange.h"
+
+cfw_range_t cfw_range_all = { 0, SIZE_MAX };

src/cfwrange.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2012, Jos Kuijpers <jos@kuijpersvof.nl>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 __CFWRANGE_H__
+#define __CFWRANGE_H__
+
+typedef struct cfw_range_t
+{
+	size_t location, length;
+} cfw_range_t;
+
+extern cfw_range_t cfw_range_all;
+
+#endif

src/cfwstring.c

@@ -131,6 +131,37 @@ cfw_string_set(CFWString *str, const char *cstr)
 	return true;
 }
 
+cfw_unichar
+cfw_string_char(CFWString *str, size_t index)
+{
+	if(len > index)
+		return str->cstr[index];
+	return NULL;
+}
+
+size_t
+cfw_string_find(CFWString *strA, CFWString *strB, cfw_range_t range)
+{
+	char *cstrA = strA->cstr+range.location;
+	size_t i, max = MIN(range.length+range.location, strB->len);
+	
+	if(strA->len == 0)
+		return 0;
+	
+	if(strA->len-range.location < strB->len)
+		return SIZE_MAX;
+	
+	for(i = range.location;
+		i <= strA->len-strB->len && i <= max;
+		i++)
+	{
+		if(!memcmp(strA->cstr+i, strB->cstr, max-i))
+			return i;
+	}
+	
+	return SIZE_MAX;
+}
+
 static CFWClass class = {
 	.name = "CFWString",
 	.size = sizeof(CFWString),

src/cfwstring.h

@@ -28,11 +28,16 @@
 #define __CFWSTRING_H__
 
 #include "cfwclass.h"
+#include "cfwrange.h"
 
 typedef struct CFWString CFWString;
+typedef uint32_t cfw_unichar;
+
 extern CFWClass *cfw_string;
 extern const char* cfw_string_c(CFWString*);
 extern size_t cfw_string_len(CFWString*);
 extern bool cfw_string_set(CFWString*, const char*);
+extern cfw_unichar cfw_string_char(CFWString*, size_t);
+extern size_t cfw_string_find(CFWString*, CFWString*, cfw_range_t);
 
 #endif