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easier way to change type Number

This commit is contained in:
Roberto Ierusalimschy 2000-10-03 11:03:21 -03:00
parent 6759f3ec5e
commit 1088cde03c
2 changed files with 11 additions and 4 deletions
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9
llimits.h
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@ -1,5 +1,5 @@
/* /*
** $Id: llimits.h,v 1.14 2000/08/29 14:48:16 roberto Exp roberto $ ** $Id: llimits.h,v 1.15 2000/09/29 12:42:13 roberto Exp roberto $
** Limits, basic types, and some other "installation-dependent" definitions ** Limits, basic types, and some other "installation-dependent" definitions
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -41,6 +41,13 @@
typedef LUA_NUM_TYPE Number; typedef LUA_NUM_TYPE Number;
/* function to convert a Number to a string */
#define lua_number2str(s,n) sprintf((s), "%.16g", (n))
/* function to convert a string to a Number */
#define lua_str2number(s,p) strtod((s), (p))
typedef unsigned long lint32; /* unsigned int with at least 32 bits */ typedef unsigned long lint32; /* unsigned int with at least 32 bits */

6
lvm.c
View File

@ -1,5 +1,5 @@
/* /*
** $Id: lvm.c,v 1.138 2000/10/02 14:47:43 roberto Exp roberto $ ** $Id: lvm.c,v 1.139 2000/10/02 20:10:55 roberto Exp roberto $
** Lua virtual machine ** Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -39,7 +39,7 @@
int luaV_tonumber (TObject *obj) { /* LUA_NUMBER */ int luaV_tonumber (TObject *obj) {
if (ttype(obj) != TAG_STRING) if (ttype(obj) != TAG_STRING)
return 1; return 1;
else { else {
@ -56,7 +56,7 @@ int luaV_tostring (lua_State *L, TObject *obj) { /* LUA_NUMBER */
return 1; return 1;
else { else {
char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */ char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */
sprintf(s, "%.16g", (double)nvalue(obj)); lua_number2str(s, nvalue(obj)); /* convert `s' to number */
tsvalue(obj) = luaS_new(L, s); tsvalue(obj) = luaS_new(L, s);
ttype(obj) = TAG_STRING; ttype(obj) = TAG_STRING;
return 0; return 0;