diff options
Diffstat (limited to 'lib/lua/src/lobject.c')
-rw-r--r-- | lib/lua/src/lobject.c | 396 |
1 files changed, 198 insertions, 198 deletions
diff --git a/lib/lua/src/lobject.c b/lib/lua/src/lobject.c index 7153a1c..bdc83b3 100644 --- a/lib/lua/src/lobject.c +++ b/lib/lua/src/lobject.c @@ -1,198 +1,198 @@ -/*
-** $Id: lobject.c,v 1.4 2004-11-27 21:35:20 pixel Exp $
-** Some generic functions over Lua objects
-** See Copyright Notice in lua.h
-*/
-
-#include <ctype.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define lobject_c
-
-#include "lua.h"
-
-#include "ldo.h"
-#include "lmem.h"
-#include "lobject.h"
-#include "lstate.h"
-#include "lstring.h"
-#include "lvm.h"
-
-const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
-
-
-/*
-** converts an integer to a "floating point byte", represented as
-** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm)
-*/
-int luaO_int2fb (unsigned int x) {
- int m = 0; /* mantissa */
- while (x >= (1<<3)) {
- x = (x+1) >> 1;
- m++;
- }
- return (m << 3) | cast(int, x);
-}
-
-
-int luaO_log2 (unsigned int x) {
- static const lu_byte log_8[255] = {
- 0,
- 1,1,
- 2,2,2,2,
- 3,3,3,3,3,3,3,3,
- 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
- };
- if (x >= 0x00010000) {
- if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24;
- else return log_8[((x>>16) & 0xff) - 1]+16;
- }
- else {
- if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8;
- else if (x) return log_8[(x & 0xff) - 1];
- return -1; /* special `log' for 0 */
- }
-}
-
-
-int luaO_rawequalObj (const TObject *t1, const TObject *t2) {
- if (ttype(t1) != ttype(t2)) return 0;
- else switch (ttype(t1)) {
- case LUA_TNIL:
- return 1;
- case LUA_TNUMBER:
- return nvalue(t1) == nvalue(t2);
- case LUA_TBOOLEAN:
- return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */
- case LUA_TLIGHTUSERDATA:
- return pvalue(t1) == pvalue(t2);
- default:
- lua_assert(iscollectable(t1));
- return gcvalue(t1) == gcvalue(t2);
- }
-}
-
-
-int luaO_str2d (const char *s, lua_Number *result) {
- char *endptr;
- size_t l = strlen(s);
- lua_Number res;
- if ((l > 0) && (s[0] == '0')) {
- if ((l > 2) && (s[1] == 'x')) {
- res = strtol(s + 2, &endptr, 16);
- } else {
- res = strtol(s + 1, &endptr, 8);
- }
- } else {
- res = strtod(s, &endptr);
- }
- if (endptr == s) return 0; /* no conversion */
- while (isspace((unsigned char)(*endptr))) endptr++;
- if (*endptr != '\0') return 0; /* invalid trailing characters? */
- *result = res;
- return 1;
-}
-
-
-
-static void pushstr (lua_State *L, const char *str) {
- setsvalue2s(L->top, luaS_new(L, str));
- incr_top(L);
-}
-
-
-/* this function handles only `%d', `%c', %f, and `%s' formats */
-const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
- int n = 1;
- pushstr(L, "");
- for (;;) {
- const char *e = strchr(fmt, '%');
- if (e == NULL) break;
- setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt));
- incr_top(L);
- switch (*(e+1)) {
- case 's':
- pushstr(L, va_arg(argp, char *));
- break;
- case 'c': {
- char buff[2];
- buff[0] = cast(char, va_arg(argp, int));
- buff[1] = '\0';
- pushstr(L, buff);
- break;
- }
- case 'd':
- setnvalue(L->top, cast(lua_Number, va_arg(argp, int)));
- incr_top(L);
- break;
- case 'f':
- setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber)));
- incr_top(L);
- break;
- case '%':
- pushstr(L, "%");
- break;
- default: lua_assert(0);
- }
- n += 2;
- fmt = e+2;
- }
- pushstr(L, fmt);
- luaV_concat(L, n+1, L->top - L->base - 1);
- L->top -= n;
- return svalue(L->top - 1);
-}
-
-
-const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
- const char *msg;
- va_list argp;
- va_start(argp, fmt);
- msg = luaO_pushvfstring(L, fmt, argp);
- va_end(argp);
- return msg;
-}
-
-
-void luaO_chunkid (char *out, const char *source, int bufflen) {
- if (*source == '=') {
- strncpy(out, source+1, bufflen); /* remove first char */
- out[bufflen-1] = '\0'; /* ensures null termination */
- }
- else { /* out = "source", or "...source" */
- if (*source == '@') {
- int l;
- source++; /* skip the `@' */
- bufflen -= sizeof(" `...' ");
- l = strlen(source);
- strcpy(out, "");
- if (l>bufflen) {
- source += (l-bufflen); /* get last part of file name */
- strcat(out, "...");
- }
- strcat(out, source);
- }
- else { /* out = [string "string"] */
- int len = strcspn(source, "\n"); /* stop at first newline */
- bufflen -= sizeof(" [string \"...\"] ");
- if (len > bufflen) len = bufflen;
- strcpy(out, "[string \"");
- if (source[len] != '\0') { /* must truncate? */
- strncat(out, source, len);
- strcat(out, "...");
- }
- else
- strcat(out, source);
- strcat(out, "\"]");
- }
- }
-}
+/* +** $Id: lobject.c,v 1.5 2004-11-27 21:46:07 pixel Exp $ +** Some generic functions over Lua objects +** See Copyright Notice in lua.h +*/ + +#include <ctype.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> + +#define lobject_c + +#include "lua.h" + +#include "ldo.h" +#include "lmem.h" +#include "lobject.h" +#include "lstate.h" +#include "lstring.h" +#include "lvm.h" + +const TObject luaO_nilobject = {LUA_TNIL, {NULL}}; + + +/* +** converts an integer to a "floating point byte", represented as +** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm) +*/ +int luaO_int2fb (unsigned int x) { + int m = 0; /* mantissa */ + while (x >= (1<<3)) { + x = (x+1) >> 1; + m++; + } + return (m << 3) | cast(int, x); +} + + +int luaO_log2 (unsigned int x) { + static const lu_byte log_8[255] = { + 0, + 1,1, + 2,2,2,2, + 3,3,3,3,3,3,3,3, + 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, + 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, + 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, + 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 + }; + if (x >= 0x00010000) { + if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24; + else return log_8[((x>>16) & 0xff) - 1]+16; + } + else { + if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8; + else if (x) return log_8[(x & 0xff) - 1]; + return -1; /* special `log' for 0 */ + } +} + + +int luaO_rawequalObj (const TObject *t1, const TObject *t2) { + if (ttype(t1) != ttype(t2)) return 0; + else switch (ttype(t1)) { + case LUA_TNIL: + return 1; + case LUA_TNUMBER: + return nvalue(t1) == nvalue(t2); + case LUA_TBOOLEAN: + return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */ + case LUA_TLIGHTUSERDATA: + return pvalue(t1) == pvalue(t2); + default: + lua_assert(iscollectable(t1)); + return gcvalue(t1) == gcvalue(t2); + } +} + + +int luaO_str2d (const char *s, lua_Number *result) { + char *endptr; + size_t l = strlen(s); + lua_Number res; + if ((l > 0) && (s[0] == '0')) { + if ((l > 2) && (s[1] == 'x')) { + res = strtol(s + 2, &endptr, 16); + } else { + res = strtol(s + 1, &endptr, 8); + } + } else { + res = strtod(s, &endptr); + } + if (endptr == s) return 0; /* no conversion */ + while (isspace((unsigned char)(*endptr))) endptr++; + if (*endptr != '\0') return 0; /* invalid trailing characters? */ + *result = res; + return 1; +} + + + +static void pushstr (lua_State *L, const char *str) { + setsvalue2s(L->top, luaS_new(L, str)); + incr_top(L); +} + + +/* this function handles only `%d', `%c', %f, and `%s' formats */ +const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { + int n = 1; + pushstr(L, ""); + for (;;) { + const char *e = strchr(fmt, '%'); + if (e == NULL) break; + setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt)); + incr_top(L); + switch (*(e+1)) { + case 's': + pushstr(L, va_arg(argp, char *)); + break; + case 'c': { + char buff[2]; + buff[0] = cast(char, va_arg(argp, int)); + buff[1] = '\0'; + pushstr(L, buff); + break; + } + case 'd': + setnvalue(L->top, cast(lua_Number, va_arg(argp, int))); + incr_top(L); + break; + case 'f': + setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber))); + incr_top(L); + break; + case '%': + pushstr(L, "%"); + break; + default: lua_assert(0); + } + n += 2; + fmt = e+2; + } + pushstr(L, fmt); + luaV_concat(L, n+1, L->top - L->base - 1); + L->top -= n; + return svalue(L->top - 1); +} + + +const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) { + const char *msg; + va_list argp; + va_start(argp, fmt); + msg = luaO_pushvfstring(L, fmt, argp); + va_end(argp); + return msg; +} + + +void luaO_chunkid (char *out, const char *source, int bufflen) { + if (*source == '=') { + strncpy(out, source+1, bufflen); /* remove first char */ + out[bufflen-1] = '\0'; /* ensures null termination */ + } + else { /* out = "source", or "...source" */ + if (*source == '@') { + int l; + source++; /* skip the `@' */ + bufflen -= sizeof(" `...' "); + l = strlen(source); + strcpy(out, ""); + if (l>bufflen) { + source += (l-bufflen); /* get last part of file name */ + strcat(out, "..."); + } + strcat(out, source); + } + else { /* out = [string "string"] */ + int len = strcspn(source, "\n"); /* stop at first newline */ + bufflen -= sizeof(" [string \"...\"] "); + if (len > bufflen) len = bufflen; + strcpy(out, "[string \""); + if (source[len] != '\0') { /* must truncate? */ + strncat(out, source, len); + strcat(out, "..."); + } + else + strcat(out, source); + strcat(out, "\"]"); + } + } +} |