| | 1 | /* |
| | 2 | * This file is part of DisOrder. |
| | 3 | * Copyright (C) 2004, 2007-9, 2013 Richard Kettlewell |
| | 4 | * |
| | 5 | * This program is free software: you can redistribute it and/or modify |
| | 6 | * it under the terms of the GNU General Public License as published by |
| | 7 | * the Free Software Foundation, either version 3 of the License, or |
| | 8 | * (at your option) any later version. |
| | 9 | * |
| | 10 | * This program is distributed in the hope that it will be useful, |
| | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 13 | * GNU General Public License for more details. |
| | 14 | * |
| | 15 | * You should have received a copy of the GNU General Public License |
| | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| | 17 | */ |
| | 18 | /** @file lib/inputline.c |
| | 19 | * @brief Line input |
| | 20 | */ |
| | 21 | |
| | 22 | #include "common.h" |
| | 23 | |
| | 24 | #include <errno.h> |
| | 25 | |
| | 26 | #include "log.h" |
| | 27 | #include "mem.h" |
| | 28 | #include "vector.h" |
| | 29 | #include "charset.h" |
| | 30 | #include "inputline.h" |
| | 31 | #include "sink.h" |
| | 32 | |
| | 33 | /** @brief Read a line from @p fp |
| | 34 | * @param tag Used in error messages |
| | 35 | * @param fp Stream to read from |
| | 36 | * @param lp Where to store newly allocated string |
| | 37 | * @param newline Newline character or @ref CRLF |
| | 38 | * @return 0 on success, -1 on error or eof. |
| | 39 | * |
| | 40 | * The newline is not included in the string. If the last line of a |
| | 41 | * stream does not have a newline then that line is still returned. |
| | 42 | * |
| | 43 | * If @p newline is @ref CRLF then the line is terminated by CR LF, |
| | 44 | * not by a single newline character. The CRLF is still not included |
| | 45 | * in the string in this case. |
| | 46 | * |
| | 47 | * @p *lp is only set if the return value was 0. |
| | 48 | */ |
| | 49 | int inputline(const char *tag, FILE *fp, char **lp, int newline) { |
| | 50 | struct source *s = source_stdio(fp); |
| | 51 | int rc = inputlines(tag, s, lp, newline); |
| | 52 | xfree(s); |
| | 53 | return rc; |
| | 54 | } |
| | 55 | |
| | 56 | int inputlines(const char *tag, struct source *s, char **lp, int newline) { |
| | 57 | struct dynstr d; |
| | 58 | int ch, err; |
| | 59 | char errbuf[1024]; |
| | 60 | |
| | 61 | dynstr_init(&d); |
| | 62 | while((ch = source_getc(s)), |
| | 63 | (!source_err(s) && !source_eof(s) && ch != newline)) { |
| | 64 | dynstr_append(&d, ch); |
| | 65 | if(newline == CRLF && d.nvec >= 2 |
| | 66 | && d.vec[d.nvec - 2] == 0x0D && d.vec[d.nvec - 1] == 0x0A) { |
| | 67 | d.nvec -= 2; |
| | 68 | break; |
| | 69 | } |
| | 70 | } |
| | 71 | if((err = source_err(s))) { |
| | 72 | disorder_error(0, "error reading %s: %s", tag, |
| | 73 | format_error(s->eclass, err, errbuf, sizeof errbuf)); |
| | 74 | return -1; |
| | 75 | } else if(source_eof(s)) { |
| | 76 | if(d.nvec != 0) |
| | 77 | disorder_error(0, "error reading %s: unexpected EOF", tag); |
| | 78 | return -1; |
| | 79 | } |
| | 80 | dynstr_terminate(&d); |
| | 81 | *lp = d.vec; |
| | 82 | return 0; |
| | 83 | } |
| | 84 | |
| | 85 | /* |
| | 86 | Local Variables: |
| | 87 | c-basic-offset:2 |
| | 88 | comment-column:40 |
| | 89 | End: |
| | 90 | */ |
~mdw / disorder / blame_incremental