From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Thu, 9 Apr 2020 09:18:26 +0000 (+0200)
Subject: basic/parse-util: add safe_atoux64()
X-Git-Tag: v246-rc1~625^2~3
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ce51632a357d347737bf40d3817df331cd8874cb;p=thirdparty%2Fsystemd.git

basic/parse-util: add safe_atoux64()
---

diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
index e0094b0f370..8de5cd5c568 100644
--- a/src/basic/parse-util.c
+++ b/src/basic/parse-util.c
@@ -395,7 +395,7 @@ int safe_atoi(const char *s, int *ret_i) {
         return 0;
 }
 
-int safe_atollu(const char *s, long long unsigned *ret_llu) {
+int safe_atollu_full(const char *s, unsigned base, long long unsigned *ret_llu) {
         char *x = NULL;
         unsigned long long l;
 
@@ -404,7 +404,7 @@ int safe_atollu(const char *s, long long unsigned *ret_llu) {
         s += strspn(s, WHITESPACE);
 
         errno = 0;
-        l = strtoull(s, &x, 0);
+        l = strtoull(s, &x, base);
         if (errno > 0)
                 return -errno;
         if (!x || x == s || *x != 0)
diff --git a/src/basic/parse-util.h b/src/basic/parse-util.h
index 36d76ba5761..970bdefbf0e 100644
--- a/src/basic/parse-util.h
+++ b/src/basic/parse-util.h
@@ -28,7 +28,6 @@ static inline int safe_atou(const char *s, unsigned *ret_u) {
 }
 
 int safe_atoi(const char *s, int *ret_i);
-int safe_atollu(const char *s, unsigned long long *ret_u);
 int safe_atolli(const char *s, long long int *ret_i);
 
 int safe_atou8(const char *s, uint8_t *ret);
@@ -59,6 +58,12 @@ static inline int safe_atoi32(const char *s, int32_t *ret_i) {
         return safe_atoi(s, (int*) ret_i);
 }
 
+int safe_atollu_full(const char *s, unsigned base, long long unsigned *ret_llu);
+
+static inline int safe_atollu(const char *s, long long unsigned *ret_llu) {
+        return safe_atollu_full(s, 0, ret_llu);
+}
+
 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
         assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
         return safe_atollu(s, (unsigned long long*) ret_u);
@@ -69,6 +74,11 @@ static inline int safe_atoi64(const char *s, int64_t *ret_i) {
         return safe_atolli(s, (long long int*) ret_i);
 }
 
+static inline int safe_atoux64(const char *s, uint64_t *ret) {
+        assert_cc(sizeof(int64_t) == sizeof(long long unsigned));
+        return safe_atollu_full(s, 16, (long long unsigned*) ret);
+}
+
 #if LONG_MAX == INT_MAX
 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
         assert_cc(sizeof(unsigned long) == sizeof(unsigned));
diff --git a/src/test/test-parse-util.c b/src/test/test-parse-util.c
index d732f402f0b..1627bc747d5 100644
--- a/src/test/test-parse-util.c
+++ b/src/test/test-parse-util.c
@@ -561,6 +561,44 @@ static void test_safe_atoi64(void) {
         assert_se(r == -EINVAL);
 }
 
+static void test_safe_atoux64(void) {
+        int r;
+        uint64_t l;
+
+        r = safe_atoux64("12345", &l);
+        assert_se(r == 0);
+        assert_se(l == 0x12345);
+
+        r = safe_atoux64("  12345", &l);
+        assert_se(r == 0);
+        assert_se(l == 0x12345);
+
+        r = safe_atoux64("0x12345", &l);
+        assert_se(r == 0);
+        assert_se(l == 0x12345);
+
+        r = safe_atoux64("18446744073709551617", &l);
+        assert_se(r == -ERANGE);
+
+        r = safe_atoux64("-1", &l);
+        assert_se(r == -ERANGE);
+
+        r = safe_atoux64("  -1", &l);
+        assert_se(r == -ERANGE);
+
+        r = safe_atoux64("junk", &l);
+        assert_se(r == -EINVAL);
+
+        r = safe_atoux64("123x", &l);
+        assert_se(r == -EINVAL);
+
+        r = safe_atoux64("12.3", &l);
+        assert_se(r == -EINVAL);
+
+        r = safe_atoux64("", &l);
+        assert_se(r == -EINVAL);
+}
+
 static void test_safe_atod(void) {
         int r;
         double d;
@@ -838,6 +876,7 @@ int main(int argc, char *argv[]) {
         test_safe_atoux16();
         test_safe_atou64();
         test_safe_atoi64();
+        test_safe_atoux64();
         test_safe_atod();
         test_parse_percent();
         test_parse_percent_unbounded();