[systemd-devel] [PATCH v2 3/8] add atoi function

[Joonas Lahtinen]

Add generic purpose number parsing function to be used by modeline
parsing.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Reviewed-by: Darren Hart <dvhart at linux.intel.com>
Reviewed-by: Mikko Ylinen <mikko.ylinen at intel.com>
---
 src/efi/gummiboot.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/efi/gummiboot.c b/src/efi/gummiboot.c
index 127db22..8a83474 100644
--- a/src/efi/gummiboot.c
+++ b/src/efi/gummiboot.c
@@ -1356,6 +1356,32 @@ static CHAR8 *strchra(CHAR8 *s, CHAR8 c) {
         return NULL;
 }
 
+static INTN atoi(CHAR16  *str)
+{
+        INTN       i;
+        BOOLEAN    sign = FALSE;
+        CHAR16     c;
+
+        while (*str && *str == ' ') {
+                str += 1;
+        }
+
+        if(*str == '-') {
+                sign = TRUE;
+                str += 1;
+        }
+
+        i = 0;
+        while (c = *(str++)) {
+                if (c >= '0' && c <= '9') {
+                        i = (i * 10) + (c - '0');
+                } else {
+                        break;
+                }
+        }
+        return sign ? -i : i;
+}
+
 static CHAR8 *line_get_key_value(CHAR8 *content, UINTN *pos, CHAR8 **key_ret, CHAR8 **value_ret) {
         CHAR8 *line;
         UINTN linelen;
-- 
1.8.1.4