1
0
mirror of https://github.com/lua/lua.git synced 2025-01-28 06:03:00 +08:00

routines are defined before rules, to allow correct compilation with bison

This commit is contained in:
Waldemar Celes 1994-12-27 18:04:29 -02:00
parent 96b2b90c50
commit 8bc4b0d741

369
lua.stx
View File

@ -1,6 +1,6 @@
%{
char *rcs_luastx = "$Id: lua.stx,v 3.13 1994/12/06 14:27:18 roberto Exp roberto $";
char *rcs_luastx = "$Id: lua.stx,v 3.14 1994/12/20 21:20:36 roberto Exp celes $";
#include <stdio.h>
#include <stdlib.h>
@ -177,6 +177,189 @@ static void code_number (float f)
}
}
/*
** Search a local name and if find return its index. If do not find return -1
*/
static int lua_localname (Word n)
{
int i;
for (i=nlocalvar-1; i >= 0; i--)
if (n == localvar[i]) return i; /* local var */
return -1; /* global var */
}
/*
** Push a variable given a number. If number is positive, push global variable
** indexed by (number -1). If negative, push local indexed by ABS(number)-1.
** Otherwise, if zero, push indexed variable (record).
*/
static void lua_pushvar (Long number)
{
if (number > 0) /* global var */
{
code_byte(PUSHGLOBAL);
code_word(number-1);
}
else if (number < 0) /* local var */
{
number = (-number) - 1;
if (number < 10) code_byte(PUSHLOCAL0 + number);
else
{
code_byte(PUSHLOCAL);
code_byte(number);
}
}
else
{
code_byte(PUSHINDEXED);
}
}
static void lua_codeadjust (int n)
{
if (n+nlocalvar == 0)
code_byte(ADJUST0);
else
{
code_byte(ADJUST);
code_byte(n+nlocalvar);
}
}
static void init_function (TreeNode *func)
{
if (funcCode == NULL) /* first function */
{
funcCode = newvector(CODE_BLOCK, Byte);
maxcode = CODE_BLOCK;
}
pc=0; basepc=funcCode; maxcurr=maxcode;
nlocalvar=0;
if (lua_debug)
{
code_byte(SETFUNCTION);
code_code((Byte *)strdup(lua_file[lua_nfile-1]));
code_word(luaI_findconstant(func));
}
}
static void codereturn (void)
{
if (lua_debug) code_byte(RESET);
if (nlocalvar == 0)
code_byte(RETCODE0);
else
{
code_byte(RETCODE);
code_byte(nlocalvar);
}
}
static void codedebugline (void)
{
if (lua_debug)
{
code_byte(SETLINE);
code_word(lua_linenumber);
}
}
static void adjust_mult_assign (int vars, int exps, int temps)
{
if (exps < 0)
{
int r = vars - (-exps-1);
if (r >= 0)
code_byte(r);
else
{
code_byte(0);
lua_codeadjust(temps);
}
}
else if (vars != exps)
lua_codeadjust(temps);
}
static void lua_codestore (int i)
{
if (varbuffer[i] > 0) /* global var */
{
code_byte(STOREGLOBAL);
code_word(varbuffer[i]-1);
}
else if (varbuffer[i] < 0) /* local var */
{
int number = (-varbuffer[i]) - 1;
if (number < 10) code_byte(STORELOCAL0 + number);
else
{
code_byte(STORELOCAL);
code_byte(number);
}
}
else /* indexed var */
{
int j;
int upper=0; /* number of indexed variables upper */
int param; /* number of itens until indexed expression */
for (j=i+1; j <nvarbuffer; j++)
if (varbuffer[j] == 0) upper++;
param = upper*2 + i;
if (param == 0)
code_byte(STOREINDEXED0);
else
{
code_byte(STOREINDEXED);
code_byte(param);
}
}
}
static void codeIf (Long thenAdd, Long elseAdd)
{
Long elseinit = elseAdd+sizeof(Word)+1;
if (pc == elseinit) /* no else */
{
pc -= sizeof(Word)+1;
elseinit = pc;
}
else
{
basepc[elseAdd] = JMP;
code_word_at(basepc+elseAdd+1, pc-elseinit);
}
basepc[thenAdd] = IFFJMP;
code_word_at(basepc+thenAdd+1,elseinit-(thenAdd+sizeof(Word)+1));
}
static void yyerror (char *s)
{
static char msg[256];
sprintf (msg,"%s near \"%s\" at line %d in file \"%s\"",
s, lua_lasttext (), lua_linenumber, lua_filename());
lua_error (msg);
}
/*
** Parse LUA code.
*/
void lua_parse (Byte **code)
{
initcode = code;
*initcode = newvector(CODE_BLOCK, Byte);
maincode = 0;
maxmain = CODE_BLOCK;
if (yyparse ()) lua_error("parse error");
(*initcode)[maincode++] = RETCODE0;
#if LISTING
{ static void PrintCode (Byte *c, Byte *end);
PrintCode(*initcode,*initcode+maincode); }
#endif
}
%}
@ -555,190 +738,6 @@ setdebug : DEBUG {lua_debug = $1;}
%%
/*
** Search a local name and if find return its index. If do not find return -1
*/
static int lua_localname (Word n)
{
int i;
for (i=nlocalvar-1; i >= 0; i--)
if (n == localvar[i]) return i; /* local var */
return -1; /* global var */
}
/*
** Push a variable given a number. If number is positive, push global variable
** indexed by (number -1). If negative, push local indexed by ABS(number)-1.
** Otherwise, if zero, push indexed variable (record).
*/
static void lua_pushvar (Long number)
{
if (number > 0) /* global var */
{
code_byte(PUSHGLOBAL);
code_word(number-1);
}
else if (number < 0) /* local var */
{
number = (-number) - 1;
if (number < 10) code_byte(PUSHLOCAL0 + number);
else
{
code_byte(PUSHLOCAL);
code_byte(number);
}
}
else
{
code_byte(PUSHINDEXED);
}
}
static void lua_codeadjust (int n)
{
if (n+nlocalvar == 0)
code_byte(ADJUST0);
else
{
code_byte(ADJUST);
code_byte(n+nlocalvar);
}
}
static void init_function (TreeNode *func)
{
if (funcCode == NULL) /* first function */
{
funcCode = newvector(CODE_BLOCK, Byte);
maxcode = CODE_BLOCK;
}
pc=0; basepc=funcCode; maxcurr=maxcode;
nlocalvar=0;
if (lua_debug)
{
code_byte(SETFUNCTION);
code_code((Byte *)strdup(lua_file[lua_nfile-1]));
code_word(luaI_findconstant(func));
}
}
static void codereturn (void)
{
if (lua_debug) code_byte(RESET);
if (nlocalvar == 0)
code_byte(RETCODE0);
else
{
code_byte(RETCODE);
code_byte(nlocalvar);
}
}
static void codedebugline (void)
{
if (lua_debug)
{
code_byte(SETLINE);
code_word(lua_linenumber);
}
}
static void adjust_mult_assign (int vars, int exps, int temps)
{
if (exps < 0)
{
int r = vars - (-exps-1);
if (r >= 0)
code_byte(r);
else
{
code_byte(0);
lua_codeadjust(temps);
}
}
else if (vars != exps)
lua_codeadjust(temps);
}
static void lua_codestore (int i)
{
if (varbuffer[i] > 0) /* global var */
{
code_byte(STOREGLOBAL);
code_word(varbuffer[i]-1);
}
else if (varbuffer[i] < 0) /* local var */
{
int number = (-varbuffer[i]) - 1;
if (number < 10) code_byte(STORELOCAL0 + number);
else
{
code_byte(STORELOCAL);
code_byte(number);
}
}
else /* indexed var */
{
int j;
int upper=0; /* number of indexed variables upper */
int param; /* number of itens until indexed expression */
for (j=i+1; j <nvarbuffer; j++)
if (varbuffer[j] == 0) upper++;
param = upper*2 + i;
if (param == 0)
code_byte(STOREINDEXED0);
else
{
code_byte(STOREINDEXED);
code_byte(param);
}
}
}
static void codeIf (Long thenAdd, Long elseAdd)
{
Long elseinit = elseAdd+sizeof(Word)+1;
if (pc == elseinit) /* no else */
{
pc -= sizeof(Word)+1;
elseinit = pc;
}
else
{
basepc[elseAdd] = JMP;
code_word_at(basepc+elseAdd+1, pc-elseinit);
}
basepc[thenAdd] = IFFJMP;
code_word_at(basepc+thenAdd+1,elseinit-(thenAdd+sizeof(Word)+1));
}
static void yyerror (char *s)
{
static char msg[256];
sprintf (msg,"%s near \"%s\" at line %d in file \"%s\"",
s, lua_lasttext (), lua_linenumber, lua_filename());
lua_error (msg);
}
/*
** Parse LUA code.
*/
void lua_parse (Byte **code)
{
initcode = code;
*initcode = newvector(CODE_BLOCK, Byte);
maincode = 0;
maxmain = CODE_BLOCK;
if (yyparse ()) lua_error("parse error");
(*initcode)[maincode++] = RETCODE0;
#if LISTING
{ static void PrintCode (Byte *c, Byte *end);
PrintCode(*initcode,*initcode+maincode); }
#endif
}
#if LISTING
static void PrintCode (Byte *code, Byte *end)