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/* tinyproxy - A fast light-weight HTTP proxy
* Copyright (C) 2002 Robert James Kaes <rjkaes@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* See 'vector.c' for detailed information. */
#ifndef _VECTOR_H
#define _VECTOR_H
#include <unistd.h>
/*
* We're using a typedef here to "hide" the implementation details of the
* vector. Sure, it's a pointer, but the struct is hidden in the C file.
* So, just use the vector_t like it's a cookie. :)
*/
typedef struct vector_s *vector_t;
/*
* vector_create() takes no arguments.
* vector_delete() is self explanatory.
*/
extern vector_t vector_create (void);
extern int vector_delete (vector_t vector);
/*
* When you insert a piece of data into the vector, the data will be
* duplicated, so you must free your copy if it was created on the heap.
* The data must be non-NULL and the length must be greater than zero.
*
* Returns: negative on error
* 0 upon successful insert.
*/
extern int vector_append (vector_t vector, void *data, size_t len);
extern int vector_prepend (vector_t vector, void *data, size_t len);
/*
* A pointer to the data at position "pos" (zero based) is returned and the
* size pointer contains the length of the data stored.
*
* The pointer points to the actual data in the vector, so you have
* the power to modify the data, but do it responsibly since the
* library doesn't take any steps to prevent you from messing up the
* vector. (A better rule is, don't modify the data since you'll
* likely mess up the "length" parameter of the data.) However, DON'T
* try to realloc or free the data; doing so will break the vector.
*
* If "size" is NULL the size of the data is not returned.
*
* Returns: NULL on error
* valid pointer to data
*/
extern void *vector_getentry (vector_t vector, size_t pos, size_t * size);
/*
* Returns the number of enteries (or the length) of the vector.
*
* Returns: negative if vector is not valid
* positive length of vector otherwise
*/
extern ssize_t vector_length (vector_t vector);
#endif /* _VECTOR_H */
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