[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/libbb/fgets_str.c b/ap/app/busybox/src/libbb/fgets_str.c
new file mode 100644
index 0000000..89210a3
--- /dev/null
+++ b/ap/app/busybox/src/libbb/fgets_str.c
@@ -0,0 +1,86 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) many different people.
+ * If you wrote this, please acknowledge your work.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+
+static char *xmalloc_fgets_internal(FILE *file, const char *terminating_string, int chop_off, size_t *maxsz_p)
+{
+ char *linebuf = NULL;
+ const int term_length = strlen(terminating_string);
+ int end_string_offset;
+ int linebufsz = 0;
+ int idx = 0;
+ int ch;
+ size_t maxsz = *maxsz_p;
+
+ while (1) {
+ ch = fgetc(file);
+ if (ch == EOF) {
+ if (idx == 0)
+ return linebuf; /* NULL */
+ break;
+ }
+
+ if (idx >= linebufsz) {
+ linebufsz += 200;
+ linebuf = xrealloc(linebuf, linebufsz);
+ if (idx >= maxsz) {
+ linebuf[idx] = ch;
+ idx++;
+ break;
+ }
+ }
+
+ 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
+ ) {
+ if (chop_off)
+ idx -= term_length;
+ break;
+ }
+ }
+ /* Grow/shrink *first*, then store NUL */
+ linebuf = xrealloc(linebuf, idx + 1);
+ linebuf[idx] = '\0';
+ *maxsz_p = idx;
+ return linebuf;
+}
+
+/* Read up to TERMINATING_STRING from FILE and return it,
+ * including terminating string.
+ * Non-terminated string can be returned if EOF is reached.
+ * Return NULL if EOF is reached immediately. */
+char* FAST_FUNC xmalloc_fgets_str(FILE *file, const char *terminating_string)
+{
+ size_t maxsz = INT_MAX - 4095;
+ return xmalloc_fgets_internal(file, terminating_string, 0, &maxsz);
+}
+
+char* FAST_FUNC xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p)
+{
+ size_t maxsz;
+
+ if (!maxsz_p) {
+ maxsz = INT_MAX - 4095;
+ maxsz_p = &maxsz;
+ }
+ return xmalloc_fgets_internal(file, terminating_string, 0, maxsz_p);
+}
+
+char* FAST_FUNC xmalloc_fgetline_str(FILE *file, const char *terminating_string)
+{
+ size_t maxsz = INT_MAX - 4095;
+ return xmalloc_fgets_internal(file, terminating_string, 1, &maxsz);
+}