| | 1 | /* -*-c-*- |
| | 2 | * |
| | 3 | * $Id: pool-file.c,v 1.2 2004/04/08 01:36:13 mdw Exp $ |
| | 4 | * |
| | 5 | * File handles in resource pools |
| | 6 | * |
| | 7 | * (c) 2000 Straylight/Edgeware |
| | 8 | */ |
| | 9 | |
| | 10 | /*----- Licensing notice --------------------------------------------------* |
| | 11 | * |
| | 12 | * This file is part of the mLib utilities library. |
| | 13 | * |
| | 14 | * mLib is free software; you can redistribute it and/or modify |
| | 15 | * it under the terms of the GNU Library General Public License as |
| | 16 | * published by the Free Software Foundation; either version 2 of the |
| | 17 | * License, or (at your option) any later version. |
| | 18 | * |
| | 19 | * mLib is distributed in the hope that it will be useful, |
| | 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 22 | * GNU Library General Public License for more details. |
| | 23 | * |
| | 24 | * You should have received a copy of the GNU Library General Public |
| | 25 | * License along with mLib; if not, write to the Free |
| | 26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| | 27 | * MA 02111-1307, USA. |
| | 28 | */ |
| | 29 | |
| | 30 | /*----- Header files ------------------------------------------------------*/ |
| | 31 | |
| | 32 | #include <stdio.h> |
| | 33 | |
| | 34 | #include "pool.h" |
| | 35 | |
| | 36 | /*----- Main code ---------------------------------------------------------*/ |
| | 37 | |
| | 38 | /* --- @pool_fopen@ --- * |
| | 39 | * |
| | 40 | * Arguments: @pool *p@ = pointer to a pool |
| | 41 | * @const char *file@ = name of the file to open |
| | 42 | * @const char *how@ = string specifying opening parameters |
| | 43 | * |
| | 44 | * Returns: A pointer to a pool resource containing an open file handle, |
| | 45 | * or null if the file open filed. |
| | 46 | * |
| | 47 | * Use: Opens a file so that it will be freed again when a pool is |
| | 48 | * destroyed. |
| | 49 | */ |
| | 50 | |
| | 51 | static void pf_destroy(pool_resource *r) { pool_fclose((pool_file *)r); } |
| | 52 | |
| | 53 | pool_file *pool_fopen(pool *p, const char *file, const char *how) |
| | 54 | { |
| | 55 | FILE *fp; |
| | 56 | pool_file *pf; |
| | 57 | |
| | 58 | if ((fp = fopen(file, how)) == 0) |
| | 59 | return (0); |
| | 60 | pf = pool_alloc(p, sizeof(pool_file)); |
| | 61 | POOL_ADD(p, &pf->r, pf_destroy); |
| | 62 | pf->fp = fp; |
| | 63 | return (pf); |
| | 64 | } |
| | 65 | |
| | 66 | /* --- @pool_fclose@ --- * |
| | 67 | * |
| | 68 | * Arguments: @pool_file *pf@ = pointer to a file resource |
| | 69 | * |
| | 70 | * Returns: The response from the @fclose@ function. |
| | 71 | * |
| | 72 | * Use: Closes a file. It is not an error to close a file multiple |
| | 73 | * times. |
| | 74 | */ |
| | 75 | |
| | 76 | int pool_fclose(pool_file *pf) |
| | 77 | { |
| | 78 | if (!pf->r.destroy) |
| | 79 | return (0); |
| | 80 | pf->r.destroy = 0; |
| | 81 | return (fclose(pf->fp)); |
| | 82 | } |
| | 83 | |
| | 84 | /*----- That's all, folks -------------------------------------------------*/ |
~mdw / mLib / blame_incremental