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authorRoberto Ierusalimschy <roberto@inf.puc-rio.br>2014-05-26 14:10:22 -0300
committerRoberto Ierusalimschy <roberto@inf.puc-rio.br>2014-05-26 14:10:22 -0300
commitc98f195eb930422be2829f78696fb4bf79b93677 (patch)
tree119b0eca4b1b1435f6a73cecb50e368455081c14 /ltable.c
parent4d696c45b9710e4b3d2eb65a0ebef79766937a4a (diff)
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function 'luaV_numtointeger' changed to a global macro
'lua_numtointeger' (tricky, small, and useful in several places)
Diffstat (limited to 'ltable.c')
-rw-r--r--ltable.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/ltable.c b/ltable.c
index 945123af..18802c9f 100644
--- a/ltable.c
+++ b/ltable.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: ltable.c,v 2.87 2014/04/15 14:28:20 roberto Exp roberto $ 2** $Id: ltable.c,v 2.88 2014/04/15 16:32:49 roberto Exp roberto $
3** Lua tables (hash) 3** Lua tables (hash)
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -67,12 +67,6 @@
67#define hashpointer(t,p) hashmod(t, IntPoint(p)) 67#define hashpointer(t,p) hashmod(t, IntPoint(p))
68 68
69 69
70/* checks whether a float has a value representable as a lua_Integer
71 (and does the conversion if so) */
72#define numisinteger(x,i) \
73 (((x) == l_floor(x)) && luaV_numtointeger(x, i))
74
75
76#define dummynode (&dummynode_) 70#define dummynode (&dummynode_)
77 71
78#define isdummy(n) ((n) == dummynode) 72#define isdummy(n) ((n) == dummynode)
@@ -84,6 +78,17 @@ static const Node dummynode_ = {
84 78
85 79
86/* 80/*
81** Checks whether a float has a value representable as a lua_Integer
82** (and does the conversion if so)
83*/
84static int numisinteger (lua_Number x, lua_Integer *p) {
85 if ((x) == l_floor(x)) /* integral value? */
86 return lua_numtointeger(x, p); /* try as an integer */
87 else return 0;
88}
89
90
91/*
87** hash for floating-point numbers 92** hash for floating-point numbers
88*/ 93*/
89static Node *hashfloat (const Table *t, lua_Number n) { 94static Node *hashfloat (const Table *t, lua_Number n) {
@@ -424,7 +429,7 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
424 if (luai_numisnan(n)) 429 if (luai_numisnan(n))
425 luaG_runerror(L, "table index is NaN"); 430 luaG_runerror(L, "table index is NaN");
426 if (numisinteger(n, &k)) { /* index is int? */ 431 if (numisinteger(n, &k)) { /* index is int? */
427 setivalue(&aux, k); 432 setivalue(&aux, k);
428 key = &aux; /* insert it as an integer */ 433 key = &aux; /* insert it as an integer */
429 } 434 }
430 } 435 }