From 17822cd60aaf9333a9895494edcf03a0037de54c Mon Sep 17 00:00:00 2001 From: Glenn L McGrath Date: Wed, 13 Jun 2001 07:34:03 +0000 Subject: Reorganise unarchive functions, new files, removed some --- libbb/fgets_str.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 libbb/fgets_str.c (limited to 'libbb/fgets_str.c') diff --git a/libbb/fgets_str.c b/libbb/fgets_str.c new file mode 100644 index 000000000..33d8d00cc --- /dev/null +++ b/libbb/fgets_str.c @@ -0,0 +1,64 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Library General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + + +#include +#include +#include + +/* + * Continue reading from file until the terminating string is encountered. + * Return data as string. + * e.g. fgets_str(file, "\n"); will read till end of file + */ + +char *fgets_str(FILE *file, const char *terminating_string) +{ + char *linebuf = NULL; + const int term_length = strlen(terminating_string); + int end_string_offset; + int linebufsz = 0; + int idx = 0; + int ch; + + while (1) { + ch = fgetc(file); + if (ch == EOF) { + break; + } + + /* grow the line buffer as necessary */ + while (idx > linebufsz - 2) { + linebuf = realloc(linebuf, linebufsz += 1000); /* GROWBY */ + } + + linebuf[idx] = ch; + idx++; + + /* Check for terminating string */ + end_string_offset = idx - term_length; + if ((end_string_offset > 0) && (memcmp(&linebuf[end_string_offset], terminating_string, term_length) == 0)) { + idx -= term_length; + break; + } + } + if (idx == 0) { + return NULL; + } + linebuf[idx] = '\0'; + return(linebuf); +} + -- cgit v1.2.3