libs,klib,stdlib: enhance atoi()

* skip leading space and finish with non-digit character
2020-02-06 23:03:13 +08:00 · 2020-02-06 23:03:13 +08:00 · b5db2daab5
parent ae87feded1
commit b5db2daab5
1 changed files with 2 additions and 1 deletions
--- a/libs/klib/src/stdlib.c
+++ b/libs/klib/src/stdlib.c
@ -19,7 +19,8 @@ int abs(int x) {

 int atoi(const char* nptr) {
  int x = 0;
-  while (*nptr != '\0') {
+  while (*nptr == ' ') { nptr ++; }
+  while (*nptr >= '0' && *nptr <= '9') {
    x = x * 10 + *nptr - '0';
    nptr ++;
  }