Return to fgetln.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / tmux / compat

Annotation of embedaddon/tmux/compat/fgetln.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 2015 Joerg Jung <jung@openbsd.org>
        !             3:  *
        !             4:  * Permission to use, copy, modify, and distribute this software for any
        !             5:  * purpose with or without fee is hereby granted, provided that the above
        !             6:  * copyright notice and this permission notice appear in all copies.
        !             7:  *
        !             8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            15:  */
        !            16: 
        !            17: /*
        !            18:  * portable fgetln() version, NOT reentrant
        !            19:  */
        !            20: 
        !            21: #include <stdio.h>
        !            22: #include <stdlib.h>
        !            23: #include <errno.h>
        !            24: 
        !            25: #include "compat.h"
        !            26: 
        !            27: char *
        !            28: fgetln(FILE *fp, size_t *len)
        !            29: {
        !            30:        static char *buf = NULL;
        !            31:        static size_t bufsz = 0;
        !            32:        size_t r = 0;
        !            33:        char *p;
        !            34:        int c, e;
        !            35: 
        !            36:        if (!fp || !len) {
        !            37:                errno = EINVAL;
        !            38:                return NULL;
        !            39:        }
        !            40:        if (!buf) {
        !            41:                if (!(buf = calloc(1, BUFSIZ)))
        !            42:                        return NULL;
        !            43:                bufsz = BUFSIZ;
        !            44:        }
        !            45:        while ((c = getc(fp)) != EOF) {
        !            46:                buf[r++] = c;
        !            47:                if (r == bufsz) {
        !            48:                        if (!(p = reallocarray(buf, 2, bufsz))) {
        !            49:                                e = errno;
        !            50:                                free(buf);
        !            51:                                errno = e;
        !            52:                                buf = NULL, bufsz = 0;
        !            53:                                return NULL;
        !            54:                        }
        !            55:                        buf = p, bufsz = 2 * bufsz;
        !            56:                }
        !            57:                if (c == '\n')
        !            58:                        break;
        !            59:        }
        !            60:        return (*len = r) ? buf : NULL;
        !            61: }