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 /*

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

  *

  * Copyright 2013 Olaf Wintermann. 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 HOLDER 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.

  */

 /**

  * @file utils.h

  * 

  * Common utilities like compare and copy functions.

  * 

  * @author Mike Becker

  * @author Olaf Wintermann

  */

 #ifndef UCX_UTILS_H

 #define	UCX_UTILS_H

 #ifdef	__cplusplus

 extern "C" {

 #endif

 #include "ucx.h"

 #include <stdint.h>

 #include <string.h>

 /**

  * Copies a string.

  * @param s the string to copy

  * @param data omitted

  * @return a pointer to a copy of s1 that can be passed to free(void*)

  */

 void *ucx_strcpy(void *s, void *data);

 /**

  * Copies a memory area.

  * @param m a pointer to the memory area

  * @param n a pointer to the size_t containing the size of the memory area

  * @return a pointer to a copy of the specified memory area that can

  * be passed to free(void*)

  */

 void *ucx_memcpy(void *m, void *n);

 /**

  * Reads data from a stream and writes it to another stream.

  * 

  * @param src the source stream

  * @param dest the destination stream

  * @param rfnc the read function

  * @param wfnc the write function

  * @param buf a pointer to the copy buffer or <code>NULL</code> if a buffer

  * shall be implicitly created on the heap

  * @param bufsize the size of the copy buffer - if <code>NULL</code> was

  * provided for <code>buf</code>, this is the size of the buffer that shall be

  * implicitly created

  * @param n the maximum number of bytes that shall be copied

  * @return the total number of bytes copied

   */

 size_t ucx_stream_copy(void *src, void *dest, read_func rfnc, write_func wfnc,

         char* buf, size_t bufsize, size_t n);

 /**

  * Shorthand for ucx_stream_copy using the default copy buffer.

  * 

  * @param src the source stream

  * @param dest the destination stream

  * @param rfnc the read function

  * @param wfnc the write function

  * @return total number of bytes copied

  */

 #define ucx_stream_hcopy(src,dest,rfnc,wfnc) ucx_stream_copy(\

         src, dest, (read_func)rfnc, (write_func)wfnc, NULL, 0x100, SIZE_MAX)

 /**

  * Shorthand for ucx_stream_copy using the default copy buffer and a copy limit.

  * 

  * @param src the source stream

  * @param dest the destination stream

  * @param rfnc the read function

  * @param wfnc the write function

  * @param n maximum number of bytes that shall be copied

  * @return total number of bytes copied

  */

 #define ucx_stream_ncopy(src,dest,rfnc,wfnc, n) ucx_stream_copy(\

         src, dest, (read_func)rfnc, (write_func)wfnc, NULL, 0x100, n)

 /**

  * Wraps the strcmp function.

  * @param s1 string one

  * @param s2 string two

  * @param data omitted

  * @return the result of strcmp(s1, s2)

  */

 int ucx_strcmp(void *s1, void *s2, void *data);

 /**

  * Wraps the strncmp function.

  * @param s1 string one

  * @param s2 string two

  * @param n a pointer to the size_t containing the third strncmp parameter

  * @return the result of strncmp(s1, s2, *n)

  */

 int ucx_strncmp(void *s1, void *s2, void *n);

 /**

  * Compares two integers of type int.

  * @param i1 pointer to integer one

  * @param i2 pointer to integer two

  * @param data omitted

  * @return -1, if *i1 is less than *i2, 0 if both are equal,

  * 1 if *i1 is greater than *i2

  */

 int ucx_intcmp(void *i1, void *i2, void *data);

 /**

  * Compares two real numbers of type float.

  * @param f1 pointer to float one

  * @param f2 pointer to float two

  * @param data if provided: a pointer to precision (default: 1e-6f)

  * @return -1, if *f1 is less than *f2, 0 if both are equal,

  * 1 if *f1 is greater than *f2

  */

 int ucx_floatcmp(void *f1, void *f2, void *data);

 /**

  * Compares two real numbers of type double.

  * @param d1 pointer to double one

  * @param d2 pointer to double two

  * @param data if provided: a pointer to precision (default: 1e-14)

  * @return -1, if *d1 is less than *d2, 0 if both are equal,

  * 1 if *d1 is greater than *d2

  */

 int ucx_doublecmp(void *d1, void *d2, void *data);

 /**

  * Compares two pointers.

  * @param ptr1 pointer one

  * @param ptr2 pointer two

  * @param data omitted

  * @return -1 if ptr1 is less than ptr2, 0 if both are equal,

  * 1 if ptr1 is greater than ptr2

  */

 int ucx_ptrcmp(void *ptr1, void *ptr2, void *data);

 /**

  * Compares two memory areas.

  * @param ptr1 pointer one

  * @param ptr2 pointer two

  * @param n a pointer to the size_t containing the third parameter for memcmp

  * @return the result of memcmp(ptr1, ptr2, *n)

  */

 int ucx_memcmp(void *ptr1, void *ptr2, void *n);

 #ifdef	__cplusplus

 }

 #endif

 #endif	/* UCX_UTILS_H */