Fixed c_i2u() didn't trigger -Wsign-conversion warning.

1 files changed, 3 insertions, 3 deletions

diff --git a/include/stc/ccommon.h b/include/stc/ccommon.h
index 42631f85..e33e657a 100644
--- a/include/stc/ccommon.h
+++ b/include/stc/ccommon.h
@@ -88,16 +88,16 @@ typedef long long _llong;
 #define c_const_cast(T, p)      ((T)(1 ? (p) : (T)0))
 #define c_swap(T, xp, yp)       do { T *_xp = xp, *_yp = yp, \
                                     _tv = *_xp; *_xp = *_yp; *_yp = _tv; } while (0)
+// use with gcc -Wsign-conversion
 #define c_sizeof                (intptr_t)sizeof
 #define c_strlen(s)             (intptr_t)strlen(s)
-
 #define c_strncmp(a, b, ilen)   strncmp(a, b, c_i2u(ilen))
 #define c_memcpy(d, s, ilen)    memcpy(d, s, c_i2u(ilen))
 #define c_memmove(d, s, ilen)   memmove(d, s, c_i2u(ilen))
 #define c_memset(d, val, ilen)  memset(d, val, c_i2u(ilen))
 #define c_memcmp(a, b, ilen)    memcmp(a, b, c_i2u(ilen))
-#define c_u2i(u)                ((intptr_t)(1 ? (u) : (size_t)1))
-#define c_i2u(i)                ((size_t)(1 ? (i) : (intptr_t)1))
+#define c_u2i(u)                (intptr_t)(1 ? (u) : (size_t)1)
+#define c_i2u(i)                (size_t)(1 ? (i) : -1)
 #define c_LTu(a, b)             ((size_t)(a) < (size_t)(b))
 
 // x and y are i_keyraw* type, defaults to i_key*: