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78 lines
2.4 KiB
78 lines
2.4 KiB
/*- |
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* Copyright (c) 2011 The NetBSD Foundation, Inc. |
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* All rights reserved. |
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* |
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* This code is derived from software contributed to The NetBSD Foundation |
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* by Christos Zoulas. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "getline.h" |
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ssize_t |
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getdelim(char** buf, size_t* bufsiz, int delimiter, FILE* fp) |
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{ |
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char* ptr, * eptr; |
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if (*buf == NULL || *bufsiz == 0) { |
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*bufsiz = BUFSIZ; |
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if ((*buf = (char*)malloc(*bufsiz)) == NULL) |
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return -1; |
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} |
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for (ptr = *buf, eptr = *buf + *bufsiz;;) { |
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int c = fgetc(fp); |
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if (c == -1) { |
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if (feof(fp)) { |
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ssize_t diff = (ssize_t)(ptr - *buf); |
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if (diff != 0) { |
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*ptr = '\0'; |
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return diff; |
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} |
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} |
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return -1; |
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} |
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*ptr++ = c; |
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if (c == delimiter) { |
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*ptr = '\0'; |
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return ptr - *buf; |
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} |
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if (ptr + 2 >= eptr) { |
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char* nbuf; |
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size_t nbufsiz = *bufsiz * 2; |
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ssize_t d = ptr - *buf; |
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if ((nbuf = (char*)realloc(*buf, nbufsiz)) == NULL) |
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return -1; |
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*buf = nbuf; |
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*bufsiz = nbufsiz; |
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eptr = nbuf + nbufsiz; |
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ptr = nbuf + d; |
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} |
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} |
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} |
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ssize_t |
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getline(char** buf, size_t* bufsiz, FILE* fp) |
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{ |
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return getdelim(buf, bufsiz, '\n', fp); |
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} |