/[public]/psiconv/trunk/lib/psiconv/list.h
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Revision 62 Revision 79
1/* 1/*
2 list.h - Part of psiconv, a PSION 5 file formats converter 2 list.h - Part of psiconv, a PSION 5 file formats converter
3 Copyright (c) 1999 Frodo Looijaard <frodol@dds.nl> 3 Copyright (c) 1999, 2000 Frodo Looijaard <frodol@dds.nl>
4 4
5 This program is free software; you can redistribute it and/or modify 5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by 6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or 7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 8 (at your option) any later version.
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21 be of the same size (solve it with pointers, if needed) */ 21 be of the same size (solve it with pointers, if needed) */
22 22
23#ifndef PSICONV_LIST_H 23#ifndef PSICONV_LIST_H
24#define PSICONV_LIST_H 24#define PSICONV_LIST_H
25 25
26#include <psiconv/general.h>
26#include <stddef.h> 27#include <stddef.h>
27#include <stdio.h> 28#include <stdio.h>
28 29
29#ifdef __cplusplus 30#ifdef __cplusplus
30extern "C" { 31extern "C" {
… …
38 as its argument. Always compute it with a sizeof() expression, just to be 39 as its argument. Always compute it with a sizeof() expression, just to be
39 safe. The returned list is empty. 40 safe. The returned list is empty.
40 If there is not enough memory available, NULL is returned. You should 41 If there is not enough memory available, NULL is returned. You should
41 always test for this explicitely, because the other functions do not 42 always test for this explicitely, because the other functions do not
42 like a psiconv_list argument that is equal to NULL */ 43 like a psiconv_list argument that is equal to NULL */
43extern psiconv_list psiconv_list_new(int element_size); 44extern psiconv_list psiconv_list_new(size_t element_size);
44 45
45/* This frees the list. If elements contain pointers that need to be freed 46/* This frees the list. If elements contain pointers that need to be freed
46 separately, call list_free_el below. */ 47 separately, call list_free_el below. */
47extern void psiconv_list_free(psiconv_list l); 48extern void psiconv_list_free(psiconv_list l);
48 49
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50 Note that you should *not* do 'free(el)' at any time; that is taken care of 51 Note that you should *not* do 'free(el)' at any time; that is taken care of
51 automatically. */ 52 automatically. */
52extern void psiconv_list_free_el(psiconv_list l, void free_el(void *el)); 53extern void psiconv_list_free_el(psiconv_list l, void free_el(void *el));
53 54
54/* Return the number of allocated elements */ 55/* Return the number of allocated elements */
55extern int psiconv_list_length(const psiconv_list l); 56extern psiconv_u32 psiconv_list_length(const psiconv_list l);
56 57
57/* Return 1 if the list is empty, 0 if not */ 58/* Return 1 if the list is empty, 0 if not */
58extern int psiconv_list_is_empty(const psiconv_list l); 59extern int psiconv_list_is_empty(const psiconv_list l);
59 60
60/* Get an element from the list, and return a pointer to it. Note: you can 61/* Get an element from the list, and return a pointer to it. Note: you can
61 directly modify this element, but be careful not to write beyond the 62 directly modify this element, but be careful not to write beyond the
62 element memory space. 63 element memory space.
63 If indx is out of range, NULL is returned. */ 64 If indx is out of range, NULL is returned. */
64extern void * psiconv_list_get(const psiconv_list l, unsigned int indx); 65extern void * psiconv_list_get(const psiconv_list l, psiconv_u32 indx);
65 66
66/* Add an element at the end of the list. The element is copied from the 67/* Add an element at the end of the list. The element is copied from the
67 supplied element. Of course, this does not help if the element contains 68 supplied element. Of course, this does not help if the element contains
68 pointers. 69 pointers.
69 As the lists extends itself, it may be necessary to allocate new 70 As the lists extends itself, it may be necessary to allocate new
70 memory. If this fails, a negative error-code is returned. If everything, 71 memory. If this fails, a negative error-code is returned. If everything,
71 succeeds, 0 is returned. */ 72 succeeds, 0 is returned. */
72extern int psiconv_list_add(psiconv_list l, void *el); 73extern int psiconv_list_add(psiconv_list l, const void *el);
73 74
74/* Do some action for each element. Note: you can directly modify the 75/* Do some action for each element. Note: you can directly modify the
75 elements supplied to action, and they will be changed in the list, 76 elements supplied to action, and they will be changed in the list,
76 but never try a free(el)! */ 77 but never try a free(el)! */
77extern void psiconv_list_foreach_el(psiconv_list l, void action(void *el)); 78extern void psiconv_list_foreach_el(psiconv_list l, void action(void *el));
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85 Returned is the actual number of elements added. This assumes the file 86 Returned is the actual number of elements added. This assumes the file
86 layout and the memory layout of elements is the same. Note that if 87 layout and the memory layout of elements is the same. Note that if
87 not enough memory could be allocated, 0 is simply returned. */ 88 not enough memory could be allocated, 0 is simply returned. */
88extern size_t psiconv_list_fread(psiconv_list l,size_t size, FILE *f); 89extern size_t psiconv_list_fread(psiconv_list l,size_t size, FILE *f);
89 90
91/* Read the whole file f to list l. Returns 0 on succes, and an errorcode
92 on failure. */
93extern int psiconv_list_fread_all(psiconv_list l, FILE *f);
94
95/* Write the whole list l to the opened file f. Returns 0 on succes, and
96 an errorcode on failure. */
97extern int psiconv_list_fwrite_all(const psiconv_list l, FILE *f);
98
99/* Concatenate two lists. The element sized does not have to be the same,
100 but the result may be quite unexpected if it is not. */
101int psiconv_list_concat(psiconv_list l, const psiconv_list extra);
102
90 103
91#ifdef __cplusplus 104#ifdef __cplusplus
92} 105}
93#endif /* __cplusplus */ 106#endif /* __cplusplus */
94 107
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