static void read_string (LexState *LS, int del, SemInfo *seminfo) {
lua_State *L = LS->L;
size_t l = 0;
checkbuffer(L, 10, l);
save_and_next(L, LS, l);
while (LS->current != del) {
checkbuffer(L, 10, l);
switch (LS->current) {
case EOZ: case '\n': case '\r':
save(L, '\0', l);
luaX_error(LS, "unfinished string", TK_STRING);
break; /* to avoid warnings */
case '\\':
next(LS); /* do not save the '\' */
switch (LS->current) {
case 'a': save(L, '\a', l); next(LS); break;
case 'b': save(L, '\b', l); next(LS); break;
case 'f': save(L, '\f', l); next(LS); break;
case 'n': save(L, '\n', l); next(LS); break;
case 'r': save(L, '\r', l); next(LS); break;
case 't': save(L, '\t', l); next(LS); break;
case 'v': save(L, '\v', l); next(LS); break;
case '\n':
save(L, '\n', l);
inclinenumber(LS);
if (LS->current == '\r') next(LS);
break;
case '\r':
save(L, '\n', l);
inclinenumber(LS);
if (LS->current == '\n') next(LS);
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
int c = 0;
int i = 0;
do {
c = 10*c + (LS->current-'0');
next(LS);
} while (++i<3 && isdigit(LS->current));
if (c != (unsigned char)c) {
save(L, '\0', l);
luaX_error(LS, "escape sequence too large", TK_STRING);
}
save(L, c, l);
break;
}
default: /* handles \\, \", \', and \? */
save_and_next(L, LS, l);
}
break;
default:
save_and_next(L, LS, l);
}
}
save_and_next(L, LS, l); /* skip delimiter */
save(L, '\0', l);
seminfo->ts = luaS_newlstr(L, L->Mbuffer+1, l-3);
}
/* this function handles only `%d', `%c', %f, %p, 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, L->top, luaS_newlstr(L, fmt, e-fmt));
incr_top(L);
switch (*(e+1)) {
case 's': {
const char *s = va_arg(argp, char *);
if (s == NULL) s = "(null)";
pushstr(L, s);
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_num(va_arg(argp, int)));
incr_top(L);
break;
}
case 'f': {
setnvalue(L->top, cast_num(va_arg(argp, l_uacNumber)));
incr_top(L);
break;
}
case 'p': {
char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */
sprintf(buff, "%p", va_arg(argp, void *));
pushstr(L, buff);
break;
}
case '%': {
pushstr(L, "%");
break;
}
default: {
char buff[3];
buff[0] = '%';
buff[1] = *(e+1);
buff[2] = '\0';
pushstr(L, buff);
break;
}
}
n += 2;
fmt = e+2;
}
pushstr(L, fmt);
luaV_concat(L, n+1, cast_int(L->top - L->base) - 1);
L->top -= n;
return svalue(L->top - 1);
}
static TaggedString *strconc (TaggedString *l, TaggedString *r)
{
size_t nl = l->u.s.len;
size_t nr = r->u.s.len;
char *buffer = luaL_openspace(nl+nr+1);
memcpy(buffer, l->str, nl);
memcpy(buffer+nl, r->str, nr);
return luaS_newlstr(buffer, nl+nr);
}
static TString *corename(lua_State *L, const TString *filename)
{
const char *fn = getstr(filename)+1;
const char *s = strrchr(fn, '/');
s = s ? s + 1 : fn;
while (*s == '.') s++;
const char *e = strchr(s, '.');
int l = e ? e - s: strlen(s);
return l ? luaS_newlstr (L, s, l) : luaS_new(L, fn);
}
LUA_API const char *lua_pushlstring (lua_State *L, const char *s, size_t len) {
TString *ts;
lua_lock(L);
luaC_checkGC(L);
ts = luaS_newlstr(L, s, len);
setsvalue2s(L, L->top, ts);
api_incr_top(L);
lua_unlock(L);
return getstr(ts);
}
/* this function handles only `%d', `%c', %f, %p, and `%s' formats */
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
int n = 0;
for (;;) {
const char *e = strchr(fmt, '%');
if (e == NULL) break;
setsvalue2s(L, L->top, luaS_newlstr(L, fmt, e-fmt));
incr_top(L);
switch (*(e+1)) {
case 's': {
const char *s = va_arg(argp, char *);
if (s == NULL) s = "(null)";
pushstr(L, s, strlen(s));
break;
}
case 'c': {
char buff;
buff = cast(char, va_arg(argp, int));
pushstr(L, &buff, 1);
break;
}
case 'd': {
setnvalue(L->top, cast_num(va_arg(argp, int)));
incr_top(L);
break;
}
case 'f': {
// Floats passed through ... are promoted to doubles...
setnvalue(L->top, cast_num(va_arg(argp, double)));
incr_top(L);
break;
}
case 'p': {
char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */
int l = sprintf(buff, "%p", va_arg(argp, void *));
pushstr(L, buff, l);
break;
}
case '%': {
pushstr(L, "%", 1);
break;
}
default: {
luaG_runerror(L,
"invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"),
*(e + 1));
}
}
n += 2;
fmt = e+2;
}
pushstr(L, fmt, strlen(fmt));
if (n > 0) luaV_concat(L, n + 1);
return svalue(L->top - 1);
}
static void read_string (LexState *LS, int del, SemInfo *seminfo) {
size_t l = 0;
checkbuffer(LS, l);
save_and_next(LS, l);
while (LS->current != del) {
checkbuffer(LS, l);
switch (LS->current) {
case EOZ:
save(LS, '\0', l);
luaX_lexerror(LS, "unfinished string", TK_EOS);
break; /* to avoid warnings */
case '\n':
save(LS, '\0', l);
luaX_lexerror(LS, "unfinished string", TK_STRING);
break; /* to avoid warnings */
case '\\':
next(LS); /* do not save the `\' */
switch (LS->current) {
case 'a': save(LS, '\a', l); next(LS); break;
case 'b': save(LS, '\b', l); next(LS); break;
case 'f': save(LS, '\f', l); next(LS); break;
case 'n': save(LS, '\n', l); next(LS); break;
case 'r': save(LS, '\r', l); next(LS); break;
case 't': save(LS, '\t', l); next(LS); break;
case 'v': save(LS, '\v', l); next(LS); break;
case '\n': save(LS, '\n', l); inclinenumber(LS); break;
case EOZ: break; /* will raise an error next loop */
default: {
if (!isdigit(LS->current))
save_and_next(LS, l); /* handles \\, \", \', and \? */
else { /* \xxx */
int c = 0;
int i = 0;
do {
c = 10*c + (LS->current-'0');
next(LS);
} while (++i<3 && isdigit(LS->current));
if (c > UCHAR_MAX) {
save(LS, '\0', l);
luaX_lexerror(LS, "escape sequence too large", TK_STRING);
}
save(LS, c, l);
}
}
}
break;
default:
save_and_next(LS, l);
}
}
save_and_next(LS, l); /* skip delimiter */
save(LS, '\0', l);
seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);
}
int luaV_tostring (lua_State *L, StkId obj) {
if (!ttisnumber(obj))
return 0;
else {
char s[LUAI_MAXNUMBER2STR];
lua_Number n = nvalue(obj);
int l = lua_number2str(s, n);
setsvalue2s(L, obj, luaS_newlstr(L, s, l));
return 1;
}
}
static void read_long_string (LexState *LS, SemInfo *seminfo) {
lua_State *L = LS->L;
int cont = 0;
size_t l = 0;
checkbuffer(L, 10, l);
save(L, '[', l); /* save first '[' */
save_and_next(L, LS, l); /* pass the second '[' */
for (;;) {
checkbuffer(L, 10, l);
switch (LS->current) {
case EOZ:
save(L, '\0', l);
if (seminfo)
luaX_error(LS, "unfinished long string", TK_STRING);
else
luaX_error(LS, "unfinished comment", TK_EOS);
break; /* to avoid warnings */
case '[':
save_and_next(L, LS, l);
if (LS->current == '[') {
cont++;
save_and_next(L, LS, l);
}
continue;
case ']':
save_and_next(L, LS, l);
if (LS->current == ']') {
if (cont == 0) goto endloop;
cont--;
save_and_next(L, LS, l);
}
continue;
case '\n':
save(L, '\n', l);
inclinenumber(LS);
if (LS->current == '\r') next(LS);
continue;
case '\r':
save(L, '\n', l);
inclinenumber(LS);
if (LS->current == '\n') next(LS);
continue;
default:
if (seminfo) /* no need to save complete comment */
save(L, LS->current, l);
next(LS);
}
} endloop:
save_and_next(L, LS, l); /* skip the second ']' */
save(L, '\0', l);
if (seminfo)
seminfo->ts = luaS_newlstr(L, L->Mbuffer+2, l-5);
}
static TString *LoadString (LoadState *S) {
size_t size = LoadByte(S);
if (size == 0xFF)
LoadVar(S, size);
if (size == 0)
return NULL;
else {
char *s = luaZ_openspace(S->L, S->b, --size);
LoadVector(S, s, size);
return luaS_newlstr(S->L, s, size);
}
}
static TString* LoadString (LoadState* S)
{
size_t size=LoadSize(S);
if (size==0)
return NULL;
else
{
char* s=luaZ_openspace(S->L,S->b,size);
ezread(S,s,size);
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
}
}
static TString* LoadString (lua_State* L, ZIO* Z, int swap)
{
size_t size=LoadSize(L,Z,swap);
if (size==0)
return NULL;
else
{
char* s=luaO_openspace(L,size);
LoadBlock(L,s,size,Z,0);
return luaS_newlstr(L,s,size-1); /* remove trailing '\0' */
}
}
static TString* LoadString(LoadState* S)
{
size_t size;
LoadVar(S,size);
if (size==0)
return NULL;
else
{
char* s=luaZ_openspace(S->L,S->b,size);
LoadBlock(S,s,size*sizeof(char));
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
}
}
int luaK_numberK (FuncState *fs, lua_Number r) {
int n;
lua_State *L = fs->ls->L;
TValue o;
setnvalue(&o, r);
if (r == 0 || luai_numisnan(NULL, r)) { /* handle -0 and NaN */
/* use raw representation as key to avoid numeric problems */
setsvalue(L, L->top++, luaS_newlstr(L, (char *)&r, sizeof(r)));
n = addk(fs, L->top - 1, &o);
L->top--;
}
else
n = addk(fs, &o, &o); /* regular case */
return n;
}
static Proto *makefakeproto(lua_State *L, lu_byte nups) {
Proto *p = luaF_newproto(L);
p->sizelineinfo = 1;
p->lineinfo = luaM_newvector(L, 1, int);
p->lineinfo[0] = 1;
p->sizecode = 1;
p->code = luaM_newvector(L, 1, Instruction);
p->code[0] = CREATE_ABC(OP_RETURN, 0, 1, 0);
p->source = luaS_newlstr(L, "", 0);
p->maxstacksize = 2;
p->nups = nups;
p->sizek = 0;
p->sizep = 0;
return p;
}
static TString* LoadString(LoadState* S)
{
size_t size = 0;
if ( sizeof(size_t) <= SIZE_T_PRECOMPILED_CHUNK )
LoadVar(S,size);
else
LoadMem(S,&size,1,SIZE_T_PRECOMPILED_CHUNK);
if (size==0)
return NULL;
else
{
char* s=luaZ_openspace(S->L,S->b,size);
LoadBlock(S,s,size);
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
}
}
static TString *LoadString (LoadState *S) {
size_t size = LoadByte(S);
if (size == 0xFF)
LoadVar(S, size);
if (size == 0)
return NULL;
else if (--size <= LUAI_MAXSHORTLEN) { /* short string? */
char buff[LUAI_MAXSHORTLEN];
LoadVector(S, buff, size);
return luaS_newlstr(S->L, buff, size);
}
else { /* long string */
TString *ts = luaS_createlngstrobj(S->L, size);
LoadVector(S, getstr(ts), size); /* load directly in final place */
return ts;
}
}
static void read_long_string (LexState *LS, SemInfo *seminfo) {
int cont = 0;
size_t l = 0;
checkbuffer(LS, l);
save(LS, '[', l); /* save first `[' */
save_and_next(LS, l); /* pass the second `[' */
if (LS->current == '\n') /* string starts with a newline? */
inclinenumber(LS); /* skip it */
for (;;) {
checkbuffer(LS, l);
switch (LS->current) {
case EOZ:
save(LS, '\0', l);
luaX_lexerror(LS, (seminfo) ? "unfinished long string" :
"unfinished long comment", TK_EOS);
break; /* to avoid warnings */
case '[':
save_and_next(LS, l);
if (LS->current == '[') {
cont++;
save_and_next(LS, l);
}
continue;
case ']':
save_and_next(LS, l);
if (LS->current == ']') {
if (cont == 0) goto endloop;
cont--;
save_and_next(LS, l);
}
continue;
case '\n':
save(LS, '\n', l);
inclinenumber(LS);
if (!seminfo) l = 0; /* reset buffer to avoid wasting space */
continue;
default:
save_and_next(LS, l);
}
} endloop:
save_and_next(LS, l); /* skip the second `]' */
save(LS, '\0', l);
if (seminfo)
seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);
}
void luaV_concat (lua_State *L, int total, int last) {
lu_mem max_sizet = MAX_SIZET;
if (G(L)->memlimit < max_sizet) max_sizet = G(L)->memlimit;
do {
/* Any call which does a memory allocation may trim the stack,
invalidating top unless the stack is fixed duri ng the allocation */
StkId top = L->base + last + 1;
fixedstack(L);
int n = 2; /* number of elements handled in this pass (at least 2) */
if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
unfixedstack(L);
if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT)) {
/* restore 'top' pointer, since stack might have been reallocted */
top = L->base + last + 1;
luaG_concaterror(L, top-2, top-1);
}
} else if (tsvalue(top-1)->len == 0) { /* second op is empty? */
(void)tostring(L, top - 2); /* result is first op (as string) */
} else {
/* at least two string values; get as many as possible */
size_t tl = tsvalue(top-1)->len;
char *buffer;
int i;
/* collect total length */
for (n = 1; n < total && tostring(L, top-n-1); n++) {
size_t l = tsvalue(top-n-1)->len;
if (l >= max_sizet - tl) luaG_runerror(L, "string length overflow");
tl += l;
}
G(L)->buff.n = tl;
buffer = luaZ_openspace(L, &G(L)->buff, tl);
tl = 0;
for (i=n; i>0; i--) { /* concat all strings */
size_t l = tsvalue(top-i)->len;
c_memcpy(buffer+tl, svalue(top-i), l);
tl += l;
}
setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
luaZ_resetbuffer(&G(L)->buff);
}
total -= n-1; /* got `n' strings to create 1 new */
last -= n-1;
unfixedstack(L);
} while (total > 1); /* repeat until only 1 result left */
}
/*
** creates a new string and anchors it in scanner's table so that
** it will not be collected until the end of the compilation
** (by that time it should be anchored somewhere)
*/
TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
lua_State *L = ls->L;
TValue *o; /* entry for 'str' */
TString *ts = luaS_newlstr(L, str, l); /* create new string */
setsvalue2s(L, L->top++, ts); /* temporarily anchor it in stack */
o = luaH_set(L, ls->h, L->top - 1);
if (ttisnil(o)) { /* not in use yet? */
/* boolean value does not need GC barrier;
table has no metatable, so it does not need to invalidate cache */
setbvalue(o, 1); /* t[string] = true */
luaC_checkGC(L);
}
else { /* string already present */
ts = tsvalue(keyfromval(o)); /* re-use value previously stored */
}
L->top--; /* remove string from stack */
return ts;
}
int luaV_tostring (lua_State *L, StkId obj) {
if (!ttisnumber(obj))
return 0;
else {
char buff[MAXNUMBER2STR];
size_t len;
if (ttisinteger(obj))
len = lua_integer2str(buff, ivalue(obj));
else {
len = lua_number2str(buff, fltvalue(obj));
if (strspn(buff, "-0123456789") == len) { /* look like an integer? */
buff[len++] = '.'; /* add a '.0' */
buff[len++] = '0';
buff[len] = '\0';
}
}
setsvalue2s(L, obj, luaS_newlstr(L, buff, len));
return 1;
}
}
static TString* LoadString(LoadState* S)
{
int32_t size;
LoadVar(S,size);
if (size==0)
return NULL;
else
{
char* s;
if (!luaZ_direct_mode(S->Z)) {
s = luaZ_openspace(S->L,S->b,size);
LoadBlock(S,s,size);
return luaS_newlstr(S->L,s,size-1); /* remove trailing zero */
} else {
s = (char*)luaZ_get_crt_address(S->Z);
LoadBlock(S,NULL,size);
return luaS_newrolstr(S->L,s,size-1);
}
}
}
void luaV_concat (lua_State *L, int total, int last)
{
do
{
StkId top = L->base + last + 1;
int n = 2; /* number of elements handled in this pass (at least 2) */
if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1))
{
if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
luaG_concaterror(L, top-2, top-1);
}
else if (tsvalue(top-1)->len == 0) /* second op is empty? */
(void)tostring(L, top - 2); /* result is first op (as string) */
else
{
/* at least two string values; get as many as possible */
size_t tl = tsvalue(top-1)->len;
char *buffer;
int i;
/* collect total length */
for (n = 1; n < total && tostring(L, top-n-1); n++)
{
size_t l = tsvalue(top-n-1)->len;
if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
tl += l;
}
buffer = luaZ_openspace(L, &G(L)->buff, tl);
tl = 0;
for (i=n; i>0; i--) /* concat all strings */
{
size_t l = tsvalue(top-i)->len;
memcpy(buffer+tl, svalue(top-i), l);
tl += l;
}
setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
}
total -= n-1; /* got `n' strings to create 1 new */
last -= n-1;
}
while (total > 1); /* repeat until only 1 result left */
}
void luaV_concat (lua_State *L, int total) {
lua_assert(total >= 2);
do {
StkId top = L->top;
int n = 2; /* number of elements handled in this pass (at least 2) */
if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
luaG_concaterror(L, top-2, top-1);
}
else if (tsvalue(top-1)->len == 0) /* second operand is empty? */
(void)tostring(L, top - 2); /* result is first operand */
else if (ttisstring(top-2) && tsvalue(top-2)->len == 0) {
setsvalue2s(L, top-2, rawtsvalue(top-1)); /* result is second op. */
}
else {
/* at least two non-empty string values; get as many as possible */
size_t tl = tsvalue(top-1)->len;
char *buffer;
int i;
/* collect total length */
for (i = 1; i < total && tostring(L, top-i-1); i++) {
size_t l = tsvalue(top-i-1)->len;
if (l >= (MAX_SIZET/sizeof(char)) - tl)
luaG_runerror(L, "string length overflow");
tl += l;
}
buffer = luaZ_openspace(L, &G(L)->buff, tl);
tl = 0;
n = i;
do { /* concat all strings */
size_t l = tsvalue(top-i)->len;
memcpy(buffer+tl, svalue(top-i), l * sizeof(char));
tl += l;
} while (--i > 0);
setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
}
total -= n-1; /* got 'n' strings to create 1 new */
L->top -= n-1; /* popped 'n' strings and pushed one */
} while (total > 1); /* repeat until only 1 result left */
}
/*
** Main operation for concatenation: concat 'total' values in the stack,
** from 'L->top - total' up to 'L->top - 1'.
*/
void luaV_concat (lua_State *L, int total) {
lua_assert(total >= 2);
do {
StkId top = L->top;
int n = 2; /* number of elements handled in this pass (at least 2) */
if (!(ttisstring(top-2) || cvt2str(top-2)) || !tostring(L, top-1))
luaT_trybinTM(L, top-2, top-1, top-2, TM_CONCAT);
else if (isemptystr(top - 1)) /* second operand is empty? */
cast_void(tostring(L, top - 2)); /* result is first operand */
else if (isemptystr(top - 2)) { /* first operand is an empty string? */
setobjs2s(L, top - 2, top - 1); /* result is second op. */
}
else {
/* at least two non-empty string values; get as many as possible */
size_t tl = vslen(top - 1);
TString *ts;
/* collect total length and number of strings */
for (n = 1; n < total && tostring(L, top - n - 1); n++) {
size_t l = vslen(top - n - 1);
if (l >= (MAX_SIZE/sizeof(char)) - tl)
luaG_runerror(L, "string length overflow");
tl += l;
}
if (tl <= LUAI_MAXSHORTLEN) { /* is result a short string? */
char buff[LUAI_MAXSHORTLEN];
copy2buff(top, n, buff); /* copy strings to buffer */
ts = luaS_newlstr(L, buff, tl);
}
else { /* long string; copy strings directly to final result */
ts = luaS_createlngstrobj(L, tl);
copy2buff(top, n, getstr(ts));
}
setsvalue2s(L, top - n, ts); /* create result */
}
total -= n-1; /* got 'n' strings to create 1 new */
L->top -= n-1; /* popped 'n' strings and pushed one */
} while (total > 1); /* repeat until only 1 result left */
}
static void pushstr (lua_State *L, const char *str, size_t l) {
setsvalue2s(L, L->top++, luaS_newlstr(L, str, l));
}
TString *luaS_new (terra_State *L, const char *str) {
return luaS_newlstr(L, str, strlen(str));
}
TaggedString *luaS_new (char *str)
{
return luaS_newlstr(str, strlen(str));
}
static void unpersistproto(int ref, UnpersistInfo *upi) {
/* perms reftbl ... */
Proto *p;
int i;
int sizep, sizek;
/* We have to be careful. The GC expects a lot out of protos. In
* particular, we need to give the function a valid string for its
* source, and valid code, even before we actually read in the real
* code. */
TString *source = luaS_newlstr(upi->L, "", 0);
p = luaF_newproto(upi->L);
p->source = source;
p->sizecode=1;
p->code = luaM_newvector(upi->L, 1, Instruction);
p->code[0] = CREATE_ABC(OP_RETURN, 0, 1, 0);
p->maxstacksize = 2;
p->sizek = 0;
p->sizep = 0;
pushproto(upi->L, p);
/* perms reftbl ... proto */
/* We don't need to register early, since protos can never ever be
* involved in cyclic references */
/* Read in constant references */
{
verify(luaZ_read(&upi->zio, &sizek, sizeof(int)) == 0);
luaM_reallocvector(upi->L, p->k, 0, sizek, TObject);
for(i=0; i<sizek; i++) {
/* perms reftbl ... proto */
unpersist(upi);
/* perms reftbl ... proto k */
setobj2s(&p->k[i], getobject(upi->L, -1));
p->sizek++;
lua_pop(upi->L, 1);
/* perms reftbl ... proto */
}
/* perms reftbl ... proto */
}
/* Read in sub-proto references */
{
verify(luaZ_read(&upi->zio, &sizep, sizeof(int)) == 0);
luaM_reallocvector(upi->L, p->p, 0, sizep, Proto*);
for(i=0; i<sizep; i++) {
/* perms reftbl ... proto */
unpersist(upi);
/* perms reftbl ... proto subproto */
p->p[i] = toproto(upi->L, -1);
p->sizep++;
lua_pop(upi->L, 1);
/* perms reftbl ... proto */
}
/* perms reftbl ... proto */
}
/* Read in code */
{
verify(luaZ_read(&upi->zio, &p->sizecode, sizeof(int)) == 0);
luaM_reallocvector(upi->L, p->code, 1, p->sizecode, Instruction);
verify(luaZ_read(&upi->zio, p->code,
sizeof(Instruction) * p->sizecode) == 0);
}
/* Read in misc values */
{
verify(luaZ_read(&upi->zio, &p->nups, sizeof(lu_byte)) == 0);
verify(luaZ_read(&upi->zio, &p->numparams, sizeof(lu_byte)) == 0);
verify(luaZ_read(&upi->zio, &p->is_vararg, sizeof(lu_byte)) == 0);
verify(luaZ_read(&upi->zio, &p->maxstacksize, sizeof(lu_byte)) == 0);
}
}
int luaX_lex (LexState *LS, SemInfo *seminfo) {
for (;;) {
switch (LS->current) {
case '\n': {
inclinenumber(LS);
continue;
}
case '-': {
next(LS);
if (LS->current != '-') return '-';
/* else is a comment */
next(LS);
if (LS->current == '[' && (next(LS), LS->current == '['))
read_long_string(LS, NULL); /* long comment */
else /* short comment */
while (LS->current != '\n' && LS->current != EOZ)
next(LS);
continue;
}
case '[': {
next(LS);
if (LS->current != '[') return '[';
else {
read_long_string(LS, seminfo);
return TK_STRING;
}
}
case '=': {
next(LS);
if (LS->current != '=') return '=';
else { next(LS); return TK_EQ; }
}
case '<': {
next(LS);
if (LS->current == '<') { next(LS); return TK_SHL; }
else if (LS->current != '=') return '<';
else { next(LS); return TK_LE; }
}
case '>': {
next(LS);
if (LS->current == '>') { next(LS); return TK_SHR; }
else if (LS->current != '=') return '>';
else { next(LS); return TK_GE; }
}
case '~': {
next(LS);
if (LS->current != '=') return '~';
else { next(LS); return TK_NE; }
}
case '"':
case '\'': {
read_string(LS, LS->current, seminfo);
return TK_STRING;
}
case '.': {
next(LS);
if (LS->current == '.') {
next(LS);
if (LS->current == '.') {
next(LS);
return TK_DOTS; /* ... */
}
else return TK_CONCAT; /* .. */
}
else if (!lex_isdigit(LS->current)) return '.';
else {
return read_numeral(LS, 1, seminfo);
}
}
case EOZ: {
return TK_EOS;
}
default: {
if (isspace(LS->current)) {
next(LS);
continue;
}
else if (lex_isdigit(LS->current)) {
return (read_numeral(LS, 0, seminfo));
}
else if (lex_isalpha(LS->current) || LS->current == '_') {
char saveCh = 0;
size_t l;
TString *ts;
if (LS->current == 'L')
{
next(LS);
if (LS->current == '"')
{
read_wstring(LS, LS->current, seminfo);
return TK_WSTRING;
}
saveCh = 'L';
}
/* identifier or reserved word */
l = readname(LS, saveCh);
ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
if (ts->tsv.reserved > 0) /* reserved word? */
return ts->tsv.reserved - 1 + FIRST_RESERVED;
seminfo->ts = ts;
return TK_NAME;
}
else {
int c = LS->current;
if (iscntrl(c))
luaX_error(LS, "invalid control char",
luaO_pushfstring(LS->L, "char(%d)", c));
next(LS);
return c; /* single-char tokens (+ - / ...) */
}
}
}
}
}
