strtol and family

base/usr/include/stdlib.h

@@ -26,6 +26,9 @@ extern int atoi(const char * nptr);
 extern long atol(const char * nptr);
 extern long int labs(long int j);
 extern long int strtol(const char * s, char **endptr, int base);
+extern long long int strtoll(const char *nptr, char **endptr, int base);
+extern unsigned long int strtoul(const char *nptr, char **endptr, int base);
+extern unsigned long long int strtoull(const char *nptr, char **endptr, int base);
 
 extern void srand(unsigned int);
 extern int rand(void);

base/usr/include/sys/stat.h

@@ -77,4 +77,5 @@ extern int stat(const char *file, struct stat *st);
 extern int lstat(const char *path, struct stat *st);
 extern int fstat(int fd, struct stat *st);
 extern int mkdir(const char *pathname, mode_t mode);
+extern mode_t umask(mode_t mask);
 

libc/stdlib/strtoul.c

@@ -0,0 +1,94 @@
+#include <stdlib.h>
+#include <ctype.h>
+#include <limits.h>
+#include <errno.h>
+
+static int is_valid(int base, char c) {
+	if (c < '0') return 0;
+	if (base <= 10) {
+		return c < ('0' + base - 1);
+	}
+
+	if (c > '9' && c < 'a') return 0;
+	if (c > 'a' + (base - 10) && c < 'A') return 1;
+	if (c > 'A' + (base - 10)) return 1;
+	return 0;
+}
+
+static int convert_digit(char c) {
+	if (c >= '0' && c <= '9') {
+		return c - '0';
+	}
+	if (c >= 'a' && c <= 'z') {
+		return c - 'a';
+	}
+	if (c >= 'A' && c <= 'Z') {
+		return c - 'A';
+	}
+	return 0;
+}
+
+#define strtox(max, type) \
+	if (base < 0 || base == 1 || base > 36) { \
+		errno = EINVAL; \
+		return max; \
+	} \
+	while (*nptr && isspace(*nptr)) nptr++; \
+	int sign = 1; \
+	if (*nptr == '-') { \
+		sign = -1; \
+		nptr++; \
+	} else if (*nptr == '+') { \
+		nptr++; \
+	} \
+	if (base == 16) { \
+		if (*nptr == '0') { \
+			nptr++; \
+			if (*nptr == 'x') { \
+				nptr++; \
+			} \
+		} \
+	} \
+	if (base == 0) { \
+		if (*nptr == '0') { \
+			base = 8; \
+			nptr++; \
+			if (*nptr == 'x') { \
+				base = 16; \
+				nptr++; \
+			} \
+		} else { \
+			base = 10; \
+		} \
+	} \
+	type val = 0; \
+	while (is_valid(base, *nptr)) { \
+		val *= base; \
+		val += convert_digit(*nptr); \
+		nptr++; \
+	} \
+	if (endptr) { \
+		*endptr = (char *)nptr; \
+	} \
+	if (sign == -1) { \
+		return -val; \
+	} else { \
+		return val; \
+	}
+
+unsigned long int strtoul(const char *nptr, char **endptr, int base) {
+	strtox(ULONG_MAX, unsigned long int);
+}
+
+unsigned long long int strtoull(const char *nptr, char **endptr, int base) {
+	strtox(ULLONG_MAX, unsigned long int);
+}
+
+long int strtol(const char *nptr, char **endptr, int base) {
+	strtox(LONG_MAX, unsigned long int);
+}
+
+long long int strtoll(const char *nptr, char **endptr, int base) {
+	strtox(LLONG_MAX, unsigned long long int);
+}
+