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/* |
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list.c - Part of psiconv, a PSION 5 file formats converter |
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Copyright (c) 1999, 2000 Frodo Looijaard <frodol@dds.nl> |
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frodo |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "config.h" |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include "list.h" |
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#include "error.h" |
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static int psiconv_list_resize(psiconv_list l,unsigned int nr); |
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struct psiconv_list_s { |
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int cur_len; |
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int max_len; |
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int el_size; |
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void *els; |
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}; |
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psiconv_list psiconv_list_new(int element_size) |
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{ |
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psiconv_list l; |
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l = malloc(sizeof(*l)); |
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if (!l) |
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return NULL; |
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l->cur_len = 0; |
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l->max_len = 0; |
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l->el_size=element_size; |
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l->els = NULL; |
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return l; |
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} |
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void psiconv_list_free(psiconv_list l) |
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{ |
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if (l->max_len) |
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free(l->els); |
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l->max_len = 0; |
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l->cur_len = 0; |
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l->els = NULL; |
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} |
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void psiconv_list_free_el(psiconv_list l, void free_el(void *el)) |
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{ |
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psiconv_list_foreach_el(l,free_el); |
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psiconv_list_free(l); |
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} |
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int psiconv_list_length(const psiconv_list l) |
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{ |
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return l->cur_len; |
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} |
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int psiconv_list_is_empty(const psiconv_list l) |
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{ |
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return l->cur_len == 0; |
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} |
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void *psiconv_list_get(const psiconv_list l, unsigned int indx) |
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{ |
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if (indx >= l->cur_len) |
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return NULL; |
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else |
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return ((char *) (l->els)) + indx * l->el_size; |
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} |
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int psiconv_list_add(psiconv_list l, void *el) |
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{ |
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if (psiconv_list_resize(l,l->cur_len + 1)) |
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return -PSICONV_E_NOMEM; |
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memcpy(((char *) (l->els)) + l->cur_len * l->el_size, el, l->el_size); |
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l->cur_len ++; |
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return 0; |
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} |
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void psiconv_list_foreach_el(psiconv_list l, void action(void *el)) |
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{ |
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int i; |
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for (i = 0; i < l->cur_len; i ++) |
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action(psiconv_list_get(l,i)); |
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} |
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psiconv_list psiconv_list_clone(const psiconv_list l) |
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{ |
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psiconv_list l2; |
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int i; |
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l2 = psiconv_list_new(l->el_size); |
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if (!l2) |
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return NULL; |
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for (i = 0; i < l->cur_len; i ++) |
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if (psiconv_list_add(l2,psiconv_list_get(l,i))) { |
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psiconv_list_free(l2); |
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return NULL; |
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} |
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return l2; |
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} |
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size_t psiconv_list_fread(psiconv_list l,size_t size, FILE *f) |
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{ |
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size_t res; |
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if (psiconv_list_resize(l,l->cur_len + size)) |
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return 0; |
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res = fread(((char *) (l->els)) + l->cur_len * l->el_size,l->el_size,size,f); |
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l->cur_len += res; |
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return res; |
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} |
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int psiconv_list_resize(psiconv_list l,unsigned int nr) |
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{ |
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void * temp; |
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if (nr > l->max_len) { |
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l->max_len = 1.1 * nr; |
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l->max_len += 16 - l->max_len % 16; |
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temp = realloc(l->els,l->max_len * l->el_size); |
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if (temp) { |
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l->els = temp; |
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return 0; |
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} else |
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return -PSICONV_E_NOMEM; |
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} |
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} |
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