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-rw-r--r--src/stdlib/atol.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/stdlib/atol.c b/src/stdlib/atol.c
new file mode 100644
index 00000000..9c91bba9
--- /dev/null
+++ b/src/stdlib/atol.c
@@ -0,0 +1,16 @@
+#include <stdlib.h>
+#include <ctype.h>
+
+long atol(const char *s)
+{
+ long n=0;
+ int neg=0;
+ while (isspace(*s)) s++;
+ switch (*s) {
+ case '-': neg=1;
+ case '+': s++;
+ }
+ while (isdigit(*s))
+ n = 10*n + *s++ - '0';
+ return neg ? -n : n;
+}