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Annotation of mandoc/compat_getline.c, Revision 1.1

1.1     ! schwarze    1: #include "config.h"
        !             2:
        !             3: #if HAVE_GETLINE
        !             4:
        !             5: int dummy;
        !             6:
        !             7: #else
        !             8:
        !             9: /*     $Id$ */
        !            10: /*
        !            11:  * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
        !            12:  *
        !            13:  * Permission to use, copy, modify, and distribute this software for any
        !            14:  * purpose with or without fee is hereby granted, provided that the above
        !            15:  * copyright notice and this permission notice appear in all copies.
        !            16:  *
        !            17:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            18:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            19:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            20:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            21:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            22:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            23:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            24:  */
        !            25:
        !            26: #include <sys/types.h>
        !            27: #include <errno.h>
        !            28: #include <stdio.h>
        !            29: #include <stdlib.h>
        !            30:
        !            31: ssize_t
        !            32: getline(char **buf, size_t *bufsz, FILE *fp)
        !            33: {
        !            34:        char    *nbuf;
        !            35:        size_t   nbufsz, pos;
        !            36:        int      c;
        !            37:
        !            38:        if (buf == NULL || bufsz == NULL) {
        !            39:                errno = EINVAL;
        !            40:                return -1;
        !            41:        }
        !            42:
        !            43:        if (*buf == NULL)
        !            44:                *bufsz = 0;
        !            45:        else
        !            46:                **buf = '\0';
        !            47:
        !            48:        pos = 0;
        !            49:        for (;;) {
        !            50:                if (pos + 1 >= *bufsz) {
        !            51:                        nbufsz = *bufsz ? *bufsz * 2 : BUFSIZ;
        !            52:                        if ((nbuf = realloc(*buf, nbufsz)) == NULL)
        !            53:                                return -1;
        !            54:                        *buf = nbuf;
        !            55:                        *bufsz = nbufsz;
        !            56:                }
        !            57:                if ((c = fgetc(fp)) == EOF) {
        !            58:                        (*buf)[pos] = '\0';
        !            59:                        return pos > 0 && feof(fp) ? (ssize_t)pos : -1;
        !            60:                }
        !            61:                (*buf)[pos++] = c;
        !            62:                (*buf)[pos] = '\0';
        !            63:                if (c == '\n')
        !            64:                        return pos;
        !            65:        }
        !            66: }
        !            67:
        !            68: #endif

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