lib: Add function to extract a number from the end of a string
Split out the code in fdtdec which finds a number at the end of a string. It
can be useful in other situations.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index a9b8a3a..4c82837 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -166,6 +166,25 @@
return result;
}
+long trailing_strtoln(const char *str, const char *end)
+{
+ const char *p;
+
+ if (!end)
+ end = str + strlen(str);
+ for (p = end - 1; p > str; p--) {
+ if (!isdigit(*p))
+ return simple_strtoul(p + 1, NULL, 10);
+ }
+
+ return -1;
+}
+
+long trailing_strtol(const char *str)
+{
+ return trailing_strtoln(str, NULL);
+}
+
/* we use this so that we can do without the ctype library */
#define is_digit(c) ((c) >= '0' && (c) <= '9')