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-rw-r--r--libbb/fgets_str.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/libbb/fgets_str.c b/libbb/fgets_str.c
new file mode 100644
index 0000000..33d8d00
--- /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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * 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);
+}
+