From c4af6732c4021ffe8b3d0c82bdcf1eebb263bfc3 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 23 Jun 2015 15:39:08 -0600 Subject: 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 --- lib/vsprintf.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'lib/vsprintf.c') diff --git a/lib/vsprintf.c b/lib/vsprintf.c index a9b8a3ae67..4c82837cc4 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -166,6 +166,25 @@ unsigned long long simple_strtoull(const char *cp, char **endp, 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') -- cgit v1.2.3