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script.c
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script.c
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// Copyright (c) Hercules Dev Team, licensed under GNU GPL.
// See the LICENSE file
// Portions Copyright (c) Athena Dev Teams
#include "../common/cbasetypes.h"
#include "../common/malloc.h"
#include "../common/md5calc.h"
#include "../common/nullpo.h"
#include "../common/random.h"
#include "../common/showmsg.h"
#include "../common/socket.h" // usage: getcharip
#include "../common/strlib.h"
#include "../common/timer.h"
#include "../common/utils.h"
#include "map.h"
#include "path.h"
#include "clif.h"
#include "chrif.h"
#include "itemdb.h"
#include "pc.h"
#include "status.h"
#include "storage.h"
#include "mob.h"
#include "npc.h"
#include "pet.h"
#include "mapreg.h"
#include "homunculus.h"
#include "instance.h"
#include "mercenary.h"
#include "intif.h"
#include "skill.h"
#include "status.h"
#include "chat.h"
#include "battle.h"
#include "battleground.h"
#include "party.h"
#include "guild.h"
#include "atcommand.h"
#include "log.h"
#include "unit.h"
#include "pet.h"
#include "mail.h"
#include "script.h"
#include "quest.h"
#include "elemental.h"
#include "../config/core.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#ifndef WIN32
#include <sys/time.h>
#endif
#include <time.h>
static inline int GETVALUE(const unsigned char* buf, int i) {
return (int)MakeDWord(MakeWord(buf[i], buf[i+1]), MakeWord(buf[i+2], 0));
}
static inline void SETVALUE(unsigned char* buf, int i, int n) {
buf[i] = GetByte(n, 0);
buf[i+1] = GetByte(n, 1);
buf[i+2] = GetByte(n, 2);
}
struct script_interface script_s;
const char* script_op2name(int op) {
#define RETURN_OP_NAME(type) case type: return #type
switch( op ) {
RETURN_OP_NAME(C_NOP);
RETURN_OP_NAME(C_POS);
RETURN_OP_NAME(C_INT);
RETURN_OP_NAME(C_PARAM);
RETURN_OP_NAME(C_FUNC);
RETURN_OP_NAME(C_STR);
RETURN_OP_NAME(C_CONSTSTR);
RETURN_OP_NAME(C_ARG);
RETURN_OP_NAME(C_NAME);
RETURN_OP_NAME(C_EOL);
RETURN_OP_NAME(C_RETINFO);
RETURN_OP_NAME(C_USERFUNC);
RETURN_OP_NAME(C_USERFUNC_POS);
RETURN_OP_NAME(C_REF);
// operators
RETURN_OP_NAME(C_OP3);
RETURN_OP_NAME(C_LOR);
RETURN_OP_NAME(C_LAND);
RETURN_OP_NAME(C_LE);
RETURN_OP_NAME(C_LT);
RETURN_OP_NAME(C_GE);
RETURN_OP_NAME(C_GT);
RETURN_OP_NAME(C_EQ);
RETURN_OP_NAME(C_NE);
RETURN_OP_NAME(C_XOR);
RETURN_OP_NAME(C_OR);
RETURN_OP_NAME(C_AND);
RETURN_OP_NAME(C_ADD);
RETURN_OP_NAME(C_SUB);
RETURN_OP_NAME(C_MUL);
RETURN_OP_NAME(C_DIV);
RETURN_OP_NAME(C_MOD);
RETURN_OP_NAME(C_NEG);
RETURN_OP_NAME(C_LNOT);
RETURN_OP_NAME(C_NOT);
RETURN_OP_NAME(C_R_SHIFT);
RETURN_OP_NAME(C_L_SHIFT);
RETURN_OP_NAME(C_ADD_POST);
RETURN_OP_NAME(C_SUB_POST);
RETURN_OP_NAME(C_ADD_PRE);
RETURN_OP_NAME(C_SUB_PRE);
default:
ShowDebug("script_op2name: unexpected op=%d\n", op);
return "???";
}
#undef RETURN_OP_NAME
}
#ifdef SCRIPT_DEBUG_DUMP_STACK
static void script_dump_stack(struct script_state* st)
{
int i;
ShowMessage("\tstart = %d\n", st->start);
ShowMessage("\tend = %d\n", st->end);
ShowMessage("\tdefsp = %d\n", st->stack->defsp);
ShowMessage("\tsp = %d\n", st->stack->sp);
for( i = 0; i < st->stack->sp; ++i )
{
struct script_data* data = &st->stack->stack_data[i];
ShowMessage("\t[%d] %s", i, script_op2name(data->type));
switch( data->type )
{
case C_INT:
case C_POS:
ShowMessage(" %d\n", data->u.num);
break;
case C_STR:
case C_CONSTSTR:
ShowMessage(" \"%s\"\n", data->u.str);
break;
case C_NAME:
ShowMessage(" \"%s\" (id=%d ref=%p subtype=%s)\n", reference_getname(data), data->u.num, data->ref, script_op2name(script->str_data[data->u.num].type));
break;
case C_RETINFO:
{
struct script_retinfo* ri = data->u.ri;
ShowMessage(" %p {var_function=%p, script=%p, pos=%d, nargs=%d, defsp=%d}\n", ri, ri->var_function, ri->script, ri->pos, ri->nargs, ri->defsp);
}
break;
default:
ShowMessage("\n");
break;
}
}
}
#endif
/// Reports on the console the src of a script error.
void script_reportsrc(struct script_state *st) {
struct block_list* bl;
if( st->oid == 0 )
return; //Can't report source.
bl = map->id2bl(st->oid);
if( bl == NULL )
return;
switch( bl->type ) {
case BL_NPC:
if( bl->m >= 0 )
ShowDebug("Source (NPC): %s at %s (%d,%d)\n", ((struct npc_data *)bl)->name, map->list[bl->m].name, bl->x, bl->y);
else
ShowDebug("Source (NPC): %s (invisible/not on a map)\n", ((struct npc_data *)bl)->name);
break;
default:
if( bl->m >= 0 )
ShowDebug("Source (Non-NPC type %d): name %s at %s (%d,%d)\n", bl->type, status->get_name(bl), map->list[bl->m].name, bl->x, bl->y);
else
ShowDebug("Source (Non-NPC type %d): name %s (invisible/not on a map)\n", bl->type, status->get_name(bl));
break;
}
}
/// Reports on the console information about the script data.
void script_reportdata(struct script_data* data)
{
if( data == NULL )
return;
switch( data->type ) {
case C_NOP:// no value
ShowDebug("Data: nothing (nil)\n");
break;
case C_INT:// number
ShowDebug("Data: number value=%d\n", data->u.num);
break;
case C_STR:
case C_CONSTSTR:// string
if( data->u.str ) {
ShowDebug("Data: string value=\"%s\"\n", data->u.str);
} else {
ShowDebug("Data: string value=NULL\n");
}
break;
case C_NAME:// reference
if( reference_tovariable(data) ) {// variable
const char* name = reference_getname(data);
ShowDebug("Data: variable name='%s' index=%d\n", name, reference_getindex(data));
} else if( reference_toconstant(data) ) {// constant
ShowDebug("Data: constant name='%s' value=%d\n", reference_getname(data), reference_getconstant(data));
} else if( reference_toparam(data) ) {// param
ShowDebug("Data: param name='%s' type=%d\n", reference_getname(data), reference_getparamtype(data));
} else {// ???
ShowDebug("Data: reference name='%s' type=%s\n", reference_getname(data), script->op2name(data->type));
ShowDebug("Please report this!!! - script->str_data.type=%s\n", script->op2name(script->str_data[reference_getid(data)].type));
}
break;
case C_POS:// label
ShowDebug("Data: label pos=%d\n", data->u.num);
break;
default:
ShowDebug("Data: %s\n", script->op2name(data->type));
break;
}
}
/// Reports on the console information about the current built-in function.
void script_reportfunc(struct script_state* st)
{
int i, params, id;
struct script_data* data;
if( !script_hasdata(st,0) )
{// no stack
return;
}
data = script_getdata(st,0);
if( !data_isreference(data) || script->str_data[reference_getid(data)].type != C_FUNC )
{// script currently not executing a built-in function or corrupt stack
return;
}
id = reference_getid(data);
params = script_lastdata(st)-1;
if( params > 0 )
{
ShowDebug("Function: %s (%d parameter%s):\n", script->get_str(id), params, ( params == 1 ) ? "" : "s");
for( i = 2; i <= script_lastdata(st); i++ )
{
script->reportdata(script_getdata(st,i));
}
}
else
{
ShowDebug("Function: %s (no parameters)\n", script->get_str(id));
}
}
/*==========================================
* Output error message
*------------------------------------------*/
static void disp_error_message2(const char *mes,const char *pos,int report) analyzer_noreturn;
static void disp_error_message2(const char *mes,const char *pos,int report) {
script->error_msg = aStrdup(mes);
script->error_pos = pos;
script->error_report = report;
longjmp( script->error_jump, 1 );
}
#define disp_error_message(mes,pos) (disp_error_message2((mes),(pos),1))
void disp_warning_message(const char *mes, const char *pos) {
script->warning(script->parser_current_src,script->parser_current_file,script->parser_current_line,mes,pos);
}
/// Checks event parameter validity
void check_event(struct script_state *st, const char *evt)
{
if( evt && evt[0] && !stristr(evt, "::On") )
{
ShowWarning("NPC event parameter deprecated! Please use 'NPCNAME::OnEVENT' instead of '%s'.\n", evt);
script->reportsrc(st);
}
}
/*==========================================
* Hashes the input string
*------------------------------------------*/
unsigned int calc_hash(const char* p) {
unsigned int h;
#if defined(SCRIPT_HASH_DJB2)
h = 5381;
while( *p ) // hash*33 + c
h = ( h << 5 ) + h + ((unsigned char)(*p++));
#elif defined(SCRIPT_HASH_SDBM)
h = 0;
while( *p ) // hash*65599 + c
h = ( h << 6 ) + ( h << 16 ) - h + ((unsigned char)(*p++));
#elif defined(SCRIPT_HASH_ELF) // UNIX ELF hash
h = 0;
while( *p ) {
unsigned int g;
h = ( h << 4 ) + ((unsigned char)(*p++));
g = h & 0xF0000000;
if( g ) {
h ^= g >> 24;
h &= ~g;
}
}
#else // athena hash
h = 0;
while( *p )
h = ( h << 1 ) + ( h >> 3 ) + ( h >> 5 ) + ( h >> 8 ) + (unsigned char)(*p++);
#endif
return h % SCRIPT_HASH_SIZE;
}
/*==========================================
* Hashes the input string in a case insensitive way
*------------------------------------------*/
unsigned int calc_hash_ci(const char* p) {
unsigned int h = 0;
#ifdef ENABLE_CASE_CHECK
#if defined(SCRIPT_HASH_DJB2)
h = 5381;
while( *p ) // hash*33 + c
h = ( h << 5 ) + h + ((unsigned char)TOLOWER(*p++));
#elif defined(SCRIPT_HASH_SDBM)
h = 0;
while( *p ) // hash*65599 + c
h = ( h << 6 ) + ( h << 16 ) - h + ((unsigned char)TOLOWER(*p++));
#elif defined(SCRIPT_HASH_ELF) // UNIX ELF hash
h = 0;
while( *p ) {
unsigned int g;
h = ( h << 4 ) + ((unsigned char)TOLOWER(*p++));
g = h & 0xF0000000;
if( g ) {
h ^= g >> 24;
h &= ~g;
}
}
#else // athena hash
h = 0;
while( *p )
h = ( h << 1 ) + ( h >> 3 ) + ( h >> 5 ) + ( h >> 8 ) + (unsigned char)TOLOWER(*p++);
#endif
#endif // ENABLE_CASE_CHECK
return h % SCRIPT_HASH_SIZE;
}
/*==========================================
* script->str_data manipulation functions
*------------------------------------------*/
/// Looks up string using the provided id.
const char* script_get_str(int id)
{
Assert( id >= LABEL_START && id < script->str_size );
return script->str_buf+script->str_data[id].str;
}
/// Returns the uid of the string, or -1.
int script_search_str(const char* p)
{
int i;
for( i = script->str_hash[script->calc_hash(p)]; i != 0; i = script->str_data[i].next ) {
if( strcmp(script->get_str(i),p) == 0 ) {
return i;
}
}
return -1;
}
void script_casecheck_clear_sub(struct casecheck_data *ccd) {
#ifdef ENABLE_CASE_CHECK
if (ccd->str_data) {
aFree(ccd->str_data);
ccd->str_data = NULL;
}
ccd->str_data_size = 0;
ccd->str_num = 1;
if (ccd->str_buf) {
aFree(ccd->str_buf);
ccd->str_buf = NULL;
}
ccd->str_pos = 0;
ccd->str_size = 0;
memset(ccd->str_hash, 0, sizeof(ccd->str_hash));
#endif // ENABLE_CASE_CHECK
}
void script_global_casecheck_clear(void) {
script_casecheck_clear_sub(&script->global_casecheck);
}
void script_local_casecheck_clear(void) {
script_casecheck_clear_sub(&script->local_casecheck);
}
const char *script_casecheck_add_str_sub(struct casecheck_data *ccd, const char *p) {
#ifdef ENABLE_CASE_CHECK
int len, i;
int h = script->calc_hash_ci(p);
if( ccd->str_hash[h] == 0 ) { //empty bucket, add new node here
ccd->str_hash[h] = ccd->str_num;
} else {
const char *s = NULL;
for( i = ccd->str_hash[h]; ; i = ccd->str_data[i].next ) {
Assert( i >= 0 && i < ccd->str_size );
s = ccd->str_buf+ccd->str_data[i].str;
if( strcasecmp(s,p) == 0 ) {
return s; // string already in list
}
if( ccd->str_data[i].next == 0 )
break; // reached the end
}
// append node to end of list
ccd->str_data[i].next = ccd->str_num;
}
// grow list if neccessary
if( ccd->str_num >= ccd->str_data_size ) {
ccd->str_data_size += 1280;
RECREATE(ccd->str_data,struct str_data_struct,ccd->str_data_size);
memset(ccd->str_data + (ccd->str_data_size - 1280), '\0', 1280);
}
len=(int)strlen(p);
// grow string buffer if neccessary
while( ccd->str_pos+len+1 >= ccd->str_size ) {
ccd->str_size += 10240;
RECREATE(ccd->str_buf,char,ccd->str_size);
memset(ccd->str_buf + (ccd->str_size - 10240), '\0', 10240);
}
safestrncpy(ccd->str_buf+ccd->str_pos, p, len+1);
ccd->str_data[ccd->str_num].type = C_NOP;
ccd->str_data[ccd->str_num].str = ccd->str_pos;
ccd->str_data[ccd->str_num].val = 0;
ccd->str_data[ccd->str_num].next = 0;
ccd->str_data[ccd->str_num].func = NULL;
ccd->str_data[ccd->str_num].backpatch = -1;
ccd->str_data[ccd->str_num].label = -1;
ccd->str_pos += len+1;
ccd->str_num++;
#endif // ENABLE_CASE_CHECK
return NULL;
}
const char *script_global_casecheck_add_str(const char *p) {
return script_casecheck_add_str_sub(&script->global_casecheck, p);
}
const char *script_local_casecheck_add_str(const char *p) {
return script_casecheck_add_str_sub(&script->local_casecheck, p);
}
/// Stores a copy of the string and returns its id.
/// If an identical string is already present, returns its id instead.
int script_add_str(const char* p)
{
int i, len, h = script->calc_hash(p);
#ifdef ENABLE_CASE_CHECK
const char *existingentry = NULL;
#endif // ENABLE_CASE_CHECK
if( script->str_hash[h] == 0 ) {// empty bucket, add new node here
script->str_hash[h] = script->str_num;
} else {// scan for end of list, or occurence of identical string
for( i = script->str_hash[h]; ; i = script->str_data[i].next ) {
if( strcmp(script->get_str(i),p) == 0 ) {
return i; // string already in list
}
if( script->str_data[i].next == 0 )
break; // reached the end
}
// append node to end of list
script->str_data[i].next = script->str_num;
}
#ifdef ENABLE_CASE_CHECK
if( (strncmp(p, ".@", 2) == 0) ) // Local scope vars are checked separately to decrease false positives
existingentry = script->local_casecheck.add_str(p);
else {
existingentry = script->global_casecheck.add_str(p);
if( existingentry ) {
if( strcasecmp(p, "disguise") == 0 || strcasecmp(p, "Poison_Spore") == 0
|| strcasecmp(p, "PecoPeco_Egg") == 0 || strcasecmp(p, "Soccer_Ball") == 0
|| strcasecmp(p, "Horn") == 0 || strcasecmp(p, "Treasure_Box_") == 0
|| strcasecmp(p, "Lord_of_Death") == 0
) // Known duplicates, don't bother warning the user
existingentry = NULL;
}
}
if( existingentry ) {
DeprecationWarning2("script_add_str", p, existingentry, script->parser_current_file); // TODO
}
#endif // ENABLE_CASE_CHECK
// grow list if neccessary
if( script->str_num >= script->str_data_size ) {
script->str_data_size += 1280;
RECREATE(script->str_data,struct str_data_struct,script->str_data_size);
memset(script->str_data + (script->str_data_size - 1280), '\0', 1280);
}
len=(int)strlen(p);
// grow string buffer if neccessary
while( script->str_pos+len+1 >= script->str_size ) {
script->str_size += 10240;
RECREATE(script->str_buf,char,script->str_size);
memset(script->str_buf + (script->str_size - 10240), '\0', 10240);
}
safestrncpy(script->str_buf+script->str_pos, p, len+1);
script->str_data[script->str_num].type = C_NOP;
script->str_data[script->str_num].str = script->str_pos;
script->str_data[script->str_num].val = 0;
script->str_data[script->str_num].next = 0;
script->str_data[script->str_num].func = NULL;
script->str_data[script->str_num].backpatch = -1;
script->str_data[script->str_num].label = -1;
script->str_pos += len+1;
return script->str_num++;
}
/// Appends 1 byte to the script buffer.
void add_scriptb(int a)
{
if( script->pos+1 >= script->size )
{
script->size += SCRIPT_BLOCK_SIZE;
RECREATE(script->buf,unsigned char,script->size);
}
script->buf[script->pos++] = (uint8)(a);
}
/// Appends a c_op value to the script buffer.
/// The value is variable-length encoded into 8-bit blocks.
/// The encoding scheme is ( 01?????? )* 00??????, LSB first.
/// All blocks but the last hold 7 bits of data, topmost bit is always 1 (carries).
void add_scriptc(int a)
{
while( a >= 0x40 )
{
script->addb((a&0x3f)|0x40);
a = (a - 0x40) >> 6;
}
script->addb(a);
}
/// Appends an integer value to the script buffer.
/// The value is variable-length encoded into 8-bit blocks.
/// The encoding scheme is ( 11?????? )* 10??????, LSB first.
/// All blocks but the last hold 7 bits of data, topmost bit is always 1 (carries).
void add_scripti(int a)
{
while( a >= 0x40 )
{
script->addb((a&0x3f)|0xc0);
a = (a - 0x40) >> 6;
}
script->addb(a|0x80);
}
/// Appends a script->str_data object (label/function/variable/integer) to the script buffer.
///
/// @param l The id of the script->str_data entry
// Maximum up to 16M
void add_scriptl(int l)
{
int backpatch = script->str_data[l].backpatch;
switch(script->str_data[l].type) {
case C_POS:
case C_USERFUNC_POS:
script->addc(C_POS);
script->addb(script->str_data[l].label);
script->addb(script->str_data[l].label>>8);
script->addb(script->str_data[l].label>>16);
break;
case C_NOP:
case C_USERFUNC:
// Embedded data backpatch there is a possibility of label
script->addc(C_NAME);
script->str_data[l].backpatch = script->pos;
script->addb(backpatch);
script->addb(backpatch>>8);
script->addb(backpatch>>16);
break;
case C_INT:
script->addi(abs(script->str_data[l].val));
if( script->str_data[l].val < 0 ) //Notice that this is negative, from jA (Rayce)
script->addc(C_NEG);
break;
default: // assume C_NAME
script->addc(C_NAME);
script->addb(l);
script->addb(l>>8);
script->addb(l>>16);
break;
}
}
/*==========================================
* Resolve the label
*------------------------------------------*/
void set_label(int l,int pos, const char* script_pos)
{
int i,next;
if(script->str_data[l].type==C_INT || script->str_data[l].type==C_PARAM || script->str_data[l].type==C_FUNC) {
//Prevent overwriting constants values, parameters and built-in functions [Skotlex]
disp_error_message("set_label: invalid label name",script_pos);
return;
}
if(script->str_data[l].label!=-1) {
disp_error_message("set_label: dup label ",script_pos);
return;
}
script->str_data[l].type=(script->str_data[l].type == C_USERFUNC ? C_USERFUNC_POS : C_POS);
script->str_data[l].label=pos;
for(i=script->str_data[l].backpatch;i>=0 && i!=0x00ffffff;) {
next=GETVALUE(script->buf,i);
script->buf[i-1]=(script->str_data[l].type == C_USERFUNC ? C_USERFUNC_POS : C_POS);
SETVALUE(script->buf,i,pos);
i=next;
}
}
/// Skips spaces and/or comments.
const char* script_skip_space(const char* p)
{
if( p == NULL )
return NULL;
for(;;)
{
while( ISSPACE(*p) )
++p;
if( *p == '/' && p[1] == '/' )
{// line comment
while(*p && *p!='\n')
++p;
}
else if( *p == '/' && p[1] == '*' )
{// block comment
p += 2;
for(;;)
{
if( *p == '\0' ) {
script->disp_warning_message("script:script->skip_space: end of file while parsing block comment. expected "CL_BOLD"*/"CL_NORM, p);
return p;
}
if( *p == '*' && p[1] == '/' )
{// end of block comment
p += 2;
break;
}
++p;
}
}
else
break;
}
return p;
}
/// Skips a word.
/// A word consists of undercores and/or alphanumeric characters,
/// and valid variable prefixes/postfixes.
const char* skip_word(const char* p) {
// prefix
switch( *p ) {
case '@':// temporary char variable
++p; break;
case '#':// account variable
p += ( p[1] == '#' ? 2 : 1 ); break;
case '\'':// instance variable
++p; break;
case '.':// npc variable
p += ( p[1] == '@' ? 2 : 1 ); break;
case '$':// global variable
p += ( p[1] == '@' ? 2 : 1 ); break;
}
while( ISALNUM(*p) || *p == '_' || *p == '\'' )
++p;
// postfix
if( *p == '$' )// string
p++;
return p;
}
/// Adds a word to script->str_data.
/// @see skip_word
/// @see script->add_str
int add_word(const char* p) {
size_t len;
int i;
// Check for a word
len = script->skip_word(p) - p;
if( len == 0 )
disp_error_message("script:add_word: invalid word. A word consists of undercores and/or alphanumeric characters, and valid variable prefixes/postfixes.", p);
// Duplicate the word
if( len+1 > script->word_size )
RECREATE(script->word_buf, char, (script->word_size = (len+1)));
memcpy(script->word_buf, p, len);
script->word_buf[len] = 0;
// add the word
i = script->add_str(script->word_buf);
return i;
}
/// Parses a function call.
/// The argument list can have parenthesis or not.
/// The number of arguments is checked.
static
const char* parse_callfunc(const char* p, int require_paren, int is_custom)
{
const char *p2;
char *arg = NULL;
char null_arg = '\0';
int func;
func = script->add_word(p);
if( script->str_data[func].type == C_FUNC ) {
// buildin function
script->addl(func);
script->addc(C_ARG);
arg = script->buildin[script->str_data[func].val];
if( !arg ) arg = &null_arg; // Use a dummy, null string
} else if( script->str_data[func].type == C_USERFUNC || script->str_data[func].type == C_USERFUNC_POS ) {
// script defined function
script->addl(script->buildin_callsub_ref);
script->addc(C_ARG);
script->addl(func);
arg = script->buildin[script->str_data[script->buildin_callsub_ref].val];
if( *arg == 0 )
disp_error_message("parse_callfunc: callsub has no arguments, please review its definition",p);
if( *arg != '*' )
++arg; // count func as argument
} else {
#ifdef SCRIPT_CALLFUNC_CHECK
const char* name = script->get_str(func);
if( !is_custom && strdb_get(script->userfunc_db, name) == NULL ) {
#endif
disp_error_message("parse_line: expect command, missing function name or calling undeclared function",p);
#ifdef SCRIPT_CALLFUNC_CHECK
} else {;
script->addl(script->buildin_callfunc_ref);
script->addc(C_ARG);
script->addc(C_STR);
while( *name ) script->addb(*name ++);
script->addb(0);
arg = script->buildin[script->str_data[script->buildin_callfunc_ref].val];
if( *arg != '*' ) ++ arg;
}
#endif
}
p = script->skip_word(p);
p = script->skip_space(p);
script->syntax.curly[script->syntax.curly_count].type = TYPE_ARGLIST;
script->syntax.curly[script->syntax.curly_count].count = 0;
if( *p == ';' )
{// <func name> ';'
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_NO_PAREN;
} else if( *p == '(' && *(p2=script->skip_space(p+1)) == ')' )
{// <func name> '(' ')'
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_PAREN;
p = p2;
/*
} else if( 0 && require_paren && *p != '(' )
{// <func name>
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_NO_PAREN;
*/
} else {// <func name> <arg list>
if( require_paren ) {
if( *p != '(' )
disp_error_message("need '('",p);
++p; // skip '('
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_PAREN;
} else if( *p == '(' ) {
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_UNDEFINED;
} else {
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_NO_PAREN;
}
++script->syntax.curly_count;
while( *arg ) {
p2=script->parse_subexpr(p,-1);
if( p == p2 )
break; // not an argument
if( *arg != '*' )
++arg; // next argument
p=script->skip_space(p2);
if( *arg == 0 || *p != ',' )
break; // no more arguments
++p; // skip comma
}
--script->syntax.curly_count;
}
if( arg && *arg && *arg != '?' && *arg != '*' )
disp_error_message2("parse_callfunc: not enough arguments, expected ','", p, script->config.warn_func_mismatch_paramnum);
if( script->syntax.curly[script->syntax.curly_count].type != TYPE_ARGLIST )
disp_error_message("parse_callfunc: DEBUG last curly is not an argument list",p);
if( script->syntax.curly[script->syntax.curly_count].flag == ARGLIST_PAREN ) {
if( *p != ')' )
disp_error_message("parse_callfunc: expected ')' to close argument list",p);
++p;
}
script->addc(C_FUNC);
return p;
}
/// Processes end of logical script line.
/// @param first When true, only fix up scheduling data is initialized
/// @param p Script position for error reporting in set_label
void parse_nextline(bool first, const char* p)
{
if( !first )
{
script->addc(C_EOL); // mark end of line for stack cleanup
script->set_label(LABEL_NEXTLINE, script->pos, p); // fix up '-' labels
}
// initialize data for new '-' label fix up scheduling
script->str_data[LABEL_NEXTLINE].type = C_NOP;
script->str_data[LABEL_NEXTLINE].backpatch = -1;
script->str_data[LABEL_NEXTLINE].label = -1;
}
/**
* Pushes a variable into stack, processing its array index if needed.
* @see parse_variable
*/
void parse_variable_sub_push(int word, const char *p2) {
const char* p3 = NULL;
if( p2 ) {
// process the variable index
// push the getelementofarray method into the stack
script->addl(script->buildin_getelementofarray_ref);
script->addc(C_ARG);
script->addl(word);
// process the sub-expression for this assignment
p3 = script->parse_subexpr(p2 + 1, 1);
p3 = script->skip_space(p3);
if( *p3 != ']' ) {// closing parenthesis is required for this script
disp_error_message("Missing closing ']' parenthesis for the variable assignment.", p3);
}
// push the closing function stack operator onto the stack
script->addc(C_FUNC);
p3++;
} else {
// No array index, simply push the variable or value onto the stack
script->addl(word);
}
}
/// Parse a variable assignment using the direct equals operator
/// @param p script position where the function should run from
/// @return NULL if not a variable assignment, the new position otherwise
const char* parse_variable(const char* p) {
int i, j, word;
c_op type = C_NOP;
const char *p2 = NULL;
const char *var = p;
if( ( p[0] == '+' && p[1] == '+' && (type = C_ADD_PRE) ) // pre ++
|| ( p[0] == '-' && p[1] == '-' && (type = C_SUB_PRE) ) // pre --
) {
var = p = script->skip_space(&p[2]);
}
// skip the variable where applicable
p = script->skip_word(p);
p = script->skip_space(p);
if( p == NULL ) {
// end of the line or invalid buffer
return NULL;
}
if( *p == '[' ) {
// array variable so process the array as appropriate
for( p2 = p, i = 0, j = 1; p; ++ i ) {
if( *p ++ == ']' && --(j) == 0 ) break;
if( *p == '[' ) ++ j;
}
if( !(p = script->skip_space(p)) ) {
// end of line or invalid characters remaining
disp_error_message("Missing right expression or closing bracket for variable.", p);
}
}
if( type == C_NOP &&
!( ( p[0] == '=' && p[1] != '=' && (type = C_EQ) ) // =
|| ( p[0] == '+' && p[1] == '=' && (type = C_ADD) ) // +=
|| ( p[0] == '-' && p[1] == '=' && (type = C_SUB) ) // -=
|| ( p[0] == '^' && p[1] == '=' && (type = C_XOR) ) // ^=
|| ( p[0] == '|' && p[1] == '=' && (type = C_OR ) ) // |=
|| ( p[0] == '&' && p[1] == '=' && (type = C_AND) ) // &=
|| ( p[0] == '*' && p[1] == '=' && (type = C_MUL) ) // *=
|| ( p[0] == '/' && p[1] == '=' && (type = C_DIV) ) // /=
|| ( p[0] == '%' && p[1] == '=' && (type = C_MOD) ) // %=
|| ( p[0] == '+' && p[1] == '+' && (type = C_ADD_POST) ) // post ++
|| ( p[0] == '-' && p[1] == '-' && (type = C_SUB_POST) ) // post --
|| ( p[0] == '<' && p[1] == '<' && p[2] == '=' && (type = C_L_SHIFT) ) // <<=
|| ( p[0] == '>' && p[1] == '>' && p[2] == '=' && (type = C_R_SHIFT) ) // >>=
) )
{// failed to find a matching operator combination so invalid
return NULL;
}
switch( type ) {
case C_ADD_PRE: // pre ++
case C_SUB_PRE: // pre --
// (nothing more to skip)
break;
case C_EQ: // =
p = script->skip_space( &p[1] );
break;
case C_L_SHIFT: // <<=
case C_R_SHIFT: // >>=
p = script->skip_space( &p[3] );
break;
default: // everything else
p = script->skip_space( &p[2] );
}
if( p == NULL ) {
// end of line or invalid buffer
return NULL;
}
// push the set function onto the stack
script->addl(script->buildin_set_ref);
script->addc(C_ARG);
// always append parenthesis to avoid errors
script->syntax.curly[script->syntax.curly_count].type = TYPE_ARGLIST;
script->syntax.curly[script->syntax.curly_count].count = 0;
script->syntax.curly[script->syntax.curly_count].flag = ARGLIST_PAREN;
// increment the total curly count for the position in the script
++script->syntax.curly_count;
// parse the variable currently being modified
word = script->add_word(var);
if( script->str_data[word].type == C_FUNC
|| script->str_data[word].type == C_USERFUNC
|| script->str_data[word].type == C_USERFUNC_POS
) {
// cannot assign a variable which exists as a function or label
disp_error_message("Cannot modify a variable which has the same name as a function or label.", p);