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** $Id: lobject.c,v 1.1 2003/02/09 21:30:32 dheck Exp $
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** Some generic functions over Lua objects
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** See Copyright Notice in lua.h
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const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
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const char *const luaO_typenames[] = {
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"userdata", "nil", "number", "string", "table", "function"
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** returns smaller power of 2 larger than `n' (minimum is MINPOWER2)
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lint32 luaO_power2 (lint32 n) {
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int luaO_equalObj (const TObject *t1, const TObject *t2) {
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if (ttype(t1) != ttype(t2)) return 0;
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return nvalue(t1) == nvalue(t2);
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case LUA_TSTRING: case LUA_TUSERDATA:
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return tsvalue(t1) == tsvalue(t2);
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return hvalue(t1) == hvalue(t2);
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return clvalue(t1) == clvalue(t2);
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LUA_ASSERT(ttype(t1) == LUA_TNIL, "invalid type");
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return 1; /* LUA_TNIL */
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char *luaO_openspace (lua_State *L, size_t n) {
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if (n > L->Mbuffsize) {
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luaM_reallocvector(L, L->Mbuffer, n, char);
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L->nblocks += (n - L->Mbuffsize)*sizeof(char);
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int luaO_str2d (const char *s, Number *result) { /* LUA_NUMBER */
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Number res = lua_str2number(s, &endptr);
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if (endptr == s) return 0; /* no conversion */
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while (isspace((unsigned char)*endptr)) endptr++;
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if (*endptr != '\0') return 0; /* invalid trailing characters? */
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/* maximum length of a string format for `luaO_verror' */
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#define MAX_VERROR 280
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/* this function needs to handle only '%d' and '%.XXs' formats */
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void luaO_verror (lua_State *L, const char *fmt, ...) {
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char buff[MAX_VERROR]; /* to hold formatted message */
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vsprintf(buff, fmt, argp);
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void luaO_chunkid (char *out, const char *source, int bufflen) {
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strncpy(out, source+1, bufflen); /* remove first char */
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out[bufflen-1] = '\0'; /* ensures null termination */
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source++; /* skip the `@' */
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bufflen -= sizeof("file `...%s'");
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source += (l-bufflen); /* get last part of file name */
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sprintf(out, "file `...%.99s'", source);
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sprintf(out, "file `%.99s'", source);
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int len = strcspn(source, "\n"); /* stop at first newline */
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bufflen -= sizeof("string \"%.*s...\"");
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if (len > bufflen) len = bufflen;
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if (source[len] != '\0') { /* must truncate? */
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strcpy(out, "string \"");
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strncpy(out, source, len);
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strcpy(out+len, "...\"");
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sprintf(out, "string \"%.99s\"", source);