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authorSteven Barth <steven@midlink.org>2009-11-28 10:24:19 +0000
committerSteven Barth <steven@midlink.org>2009-11-28 10:24:19 +0000
commit87491bf031881a4f5b828aaf6826cf98bda1252e (patch)
treea67086f36d95dbac5ea02f3c06ecf827fa171fbf /libs/nixio/src/bit.c
parent7f9c9d208e2465e80cba92dcc8d450022a8cfd1e (diff)
nixio: Improve number handling with non-double Lua setups
Diffstat (limited to 'libs/nixio/src/bit.c')
-rw-r--r--libs/nixio/src/bit.c51
1 files changed, 33 insertions, 18 deletions
diff --git a/libs/nixio/src/bit.c b/libs/nixio/src/bit.c
index 5b41e91aa4..1b352c51c5 100644
--- a/libs/nixio/src/bit.c
+++ b/libs/nixio/src/bit.c
@@ -21,19 +21,24 @@
#include <stdlib.h>
/* 52 bit maximum precision */
+#ifdef NIXIO_DOUBLE
+#define NIXIO_BIT_BMAX 52
+#define NIXIO_BIT_NMAX 0xfffffffffffff
+#else
#define NIXIO_BIT_BMAX 32
#define NIXIO_BIT_NMAX 0xffffffff
+#endif
#define NIXIO_BIT_XOP(BIT_XOP) \
- uint64_t oper = luaL_checkinteger(L, 1); \
+ uint64_t oper = nixio__checknumber(L, 1); \
const int args = lua_gettop(L); \
\
for (int i = 2; i <= args; i++) { \
- uint64_t oper2 = luaL_checkinteger(L, i); \
+ uint64_t oper2 = nixio__checknumber(L, i); \
oper BIT_XOP oper2; \
} \
\
- lua_pushinteger(L, oper); \
+ nixio__pushnumber(L, oper); \
return 1; \
@@ -54,53 +59,63 @@ static int nixio_bit_unset(lua_State *L) {
}
static int nixio_bit_not(lua_State *L) {
- lua_pushinteger(L, (~((uint64_t)luaL_checkinteger(L, 1))) & NIXIO_BIT_NMAX);
+ nixio__pushnumber(L,
+ (~((uint64_t)nixio__checknumber(L, 1))) & NIXIO_BIT_NMAX);
return 1;
}
static int nixio_bit_shl(lua_State *L) {
- uint64_t oper = luaL_checkinteger(L, 1);
+ uint64_t oper = nixio__checknumber(L, 1);
oper <<= luaL_checkinteger(L, 2);
if (oper > NIXIO_BIT_NMAX) {
return luaL_error(L, "arithmetic overflow");
} else {
- lua_pushinteger(L, oper);
+ nixio__pushnumber(L, oper);
return 1;
}
}
static int nixio_bit_ashr(lua_State *L) {
- int64_t oper = luaL_checkinteger(L, 1);
- lua_pushinteger(L, oper >> luaL_checkinteger(L, 2));
+ int64_t oper = nixio__checknumber(L, 1);
+ nixio__pushnumber(L, oper >> luaL_checkinteger(L, 2));
return 1;
}
static int nixio_bit_shr(lua_State *L) {
- uint64_t oper = luaL_checkinteger(L, 1);
- lua_pushinteger(L, oper >> luaL_checkinteger(L, 2));
+ uint64_t oper = nixio__checknumber(L, 1);
+ nixio__pushnumber(L, oper >> luaL_checkinteger(L, 2));
return 1;
}
static int nixio_bit_div(lua_State *L) {
- NIXIO_BIT_XOP(/=);
+ uint64_t oper = luaL_checknumber(L, 1);
+ const int args = lua_gettop(L);
+
+ for (int i = 2; i <= args; i++) {
+ uint64_t oper2 = nixio__checknumber(L, i);
+ oper /= oper2;
+ }
+
+ nixio__pushnumber(L, oper);
+ return 1;
}
static int nixio_bit_check(lua_State *L) {
- uint64_t oper = luaL_checkinteger(L, 1);
- uint64_t oper2 = luaL_checkinteger(L, 2);
+ uint64_t oper = nixio__checknumber(L, 1);
+ uint64_t oper2 = nixio__checknumber(L, 2);
lua_pushboolean(L, (oper & oper2) == oper2);
return 1;
}
static int nixio_bit_cast(lua_State *L) {
- lua_pushinteger(L, ((uint64_t)luaL_checkinteger(L, 1)) & NIXIO_BIT_NMAX);
+ nixio__pushnumber(L, ((uint64_t)nixio__checknumber(L, 1)) & NIXIO_BIT_NMAX);
return 1;
}
static int nixio_bit_swap(lua_State *L) {
- uint64_t op = luaL_checkinteger(L, 1);
+ uint64_t op = nixio__checknumber(L, 1);
op = (op >> 24) | ((op >> 8) & 0xff00) | ((op & 0xff00) << 8) | (op << 24);
- lua_pushinteger(L, op);
+ nixio__pushnumber(L, op);
return 1;
}
@@ -126,9 +141,9 @@ static const luaL_reg R[] = {
void nixio_open_bit(lua_State *L) {
lua_newtable(L);
luaL_register(L, NULL, R);
- lua_pushinteger(L, NIXIO_BIT_BMAX);
+ nixio__pushnumber(L, NIXIO_BIT_BMAX);
lua_setfield(L, -2, "bits");
- lua_pushinteger(L, NIXIO_BIT_NMAX);
+ nixio__pushnumber(L, NIXIO_BIT_NMAX);
lua_setfield(L, -2, "max");
lua_setfield(L, -2, "bit");
}