Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Utility routines. |
| 4 | * |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 5 | * Copyright (C) 2005, 2006 Rob Landley <rob@landley.net> |
| 6 | * Copyright (C) 2004 Erik Andersen <andersen@codepoet.org> |
| 7 | * Copyright (C) 2001 Matt Krai |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 8 | * |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include <stdio.h> |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 13 | #include <stdlib.h> |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 14 | #include "libbb.h" |
| 15 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 16 | /* get_line_from_file() - This function reads an entire line from a text file, |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 17 | * up to a newline or NUL byte. It returns a malloc'ed char * which must be |
| 18 | * stored and free'ed by the caller. If end is null '\n' isn't considered |
| 19 | * and of line. If end isn't null, length of the chunk read is stored in it. */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 20 | |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 21 | char *bb_get_chunk_from_file(FILE * file, int *end) |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 22 | { |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 23 | int ch; |
| 24 | int idx = 0; |
| 25 | char *linebuf = NULL; |
| 26 | int linebufsz = 0; |
| 27 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 28 | while ((ch = getc(file)) != EOF) { |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 29 | /* grow the line buffer as necessary */ |
Glenn L McGrath | 2570b43 | 2003-09-16 05:25:43 +0000 | [diff] [blame] | 30 | if (idx > linebufsz - 2) { |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 31 | linebuf = xrealloc(linebuf, linebufsz += 80); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 32 | } |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 33 | linebuf[idx++] = (char) ch; |
| 34 | if (!ch || (end && ch == '\n')) |
| 35 | break; |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 36 | } |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 37 | if (end) |
| 38 | *end = idx; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 39 | if (linebuf) { |
| 40 | if (ferror(file)) { |
| 41 | free(linebuf); |
| 42 | return NULL; |
| 43 | } |
| 44 | linebuf[idx] = 0; |
| 45 | } |
Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 46 | return linebuf; |
| 47 | } |
| 48 | |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 49 | /* Get line, including trailing /n if any */ |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 50 | char *bb_get_line_from_file(FILE * file) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 51 | { |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 52 | int i; |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 53 | |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 54 | return bb_get_chunk_from_file(file, &i); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 55 | } |
| 56 | |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 57 | /* Get line. Remove trailing /n */ |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 58 | char *bb_get_chomped_line_from_file(FILE * file) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 59 | { |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 60 | int i; |
Bernhard Reutner-Fischer | 2d1a6e7 | 2006-06-10 11:04:43 +0000 | [diff] [blame^] | 61 | char *c = bb_get_chunk_from_file(file, &i); |
| 62 | |
| 63 | if (i && c[--i] == '\n') |
| 64 | c[i] = 0; |
| 65 | |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 66 | return c; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 67 | } |