/* ToPrimitive() on a value */
void jsV_toprimitive(js_State *J, js_Value *v, int preferred)
{
js_Object *obj;
if (v->type != JS_TOBJECT)
return;
obj = v->u.object;
if (preferred == JS_HNONE)
preferred = obj->type == JS_CDATE ? JS_HSTRING : JS_HNUMBER;
if (preferred == JS_HSTRING) {
if (jsV_toString(J, obj) || jsV_valueOf(J, obj)) {
*v = *js_tovalue(J, -1);
js_pop(J, 1);
return;
}
} else {
if (jsV_valueOf(J, obj) || jsV_toString(J, obj)) {
*v = *js_tovalue(J, -1);
js_pop(J, 1);
return;
}
}
v->type = JS_TLITSTR;
v->u.litstr = "[object]";
return;
}
void js_concat(js_State *J)
{
js_Value va = js_toprimitive(J, -2, JS_HNONE);
js_Value vb = js_toprimitive(J, -1, JS_HNONE);
if (va.type == JS_TSTRING || vb.type == JS_TSTRING) {
const char *sa = jsV_tostring(J, &va);
const char *sb = jsV_tostring(J, &vb);
char *sab = js_malloc(J, strlen(sa) + strlen(sb) + 1);
strcpy(sab, sa);
strcat(sab, sb);
if (js_try(J)) {
js_free(J, sab);
js_throw(J);
}
js_pop(J, 2);
js_pushstring(J, sab);
js_endtry(J);
js_free(J, sab);
} else {
double x = jsV_tonumber(J, &va);
double y = jsV_tonumber(J, &vb);
js_pop(J, 2);
js_pushnumber(J, x + y);
}
}
/* ToPrimitive() on a value */
js_Value jsV_toprimitive(js_State *J, const js_Value *v, int preferred)
{
js_Value vv;
js_Object *obj;
if (v->type != JS_TOBJECT)
return *v;
obj = v->u.object;
if (preferred == JS_HNONE)
preferred = obj->type == JS_CDATE ? JS_HSTRING : JS_HNUMBER;
if (preferred == JS_HSTRING) {
if (jsV_toString(J, obj) || jsV_valueOf(J, obj)) {
vv = js_tovalue(J, -1);
js_pop(J, 1);
return vv;
}
} else {
if (jsV_valueOf(J, obj) || jsV_toString(J, obj)) {
vv = js_tovalue(J, -1);
js_pop(J, 1);
return vv;
}
}
js_typeerror(J, "cannot convert object to primitive");
}
static void wrapgetter(js_State *J)
{
pdf_jsimp_obj *ret;
pdf_jsimp_getter *get;
const char *type;
void *jsctx;
void *obj;
js_getregistry(J, "jsctx");
jsctx = js_touserdata(J, "jsctx", -1);
js_pop(J, 1);
js_currentfunction(J);
{
js_getproperty(J, -1, "__get");
get = js_touserdata(J, "getter", -1);
js_pop(J, 1);
js_getproperty(J, -1, "__type");
type = js_tostring(J, -1);
js_pop(J, 1);
}
js_pop(J, 1);
if (js_isuserdata(J, type, 0))
obj = js_touserdata(J, type, 0);
else
obj = NULL;
ret = get(jsctx, obj);
if (ret)
js_copy(J, IDX(ret));
else
js_pushundefined(J);
}
static void wrapsetter(js_State *J)
{
pdf_jsimp_setter *set;
const char *type;
void *jsctx;
void *obj;
js_getregistry(J, "jsctx");
jsctx = js_touserdata(J, "jsctx", -1);
js_pop(J, 1);
js_currentfunction(J);
{
js_getproperty(J, -1, "__set");
set = js_touserdata(J, "setter", -1);
js_pop(J, 1);
js_getproperty(J, -1, "__type");
type = js_tostring(J, -1);
js_pop(J, 1);
}
js_pop(J, 1);
if (js_isuserdata(J, type, 0))
obj = js_touserdata(J, type, 0);
else
obj = NULL;
set(jsctx, obj, OBJ(1));
js_pushundefined(J);
}
static void Ap_filter(js_State *J)
{
int hasthis = js_gettop(J) >= 3;
int k, to, len;
if (!js_iscallable(J, 1))
js_typeerror(J, "callback is not a function");
js_newarray(J);
to = 0;
len = js_getlength(J, 0);
for (k = 0; k < len; ++k) {
if (js_hasindex(J, 0, k)) {
js_copy(J, 1);
if (hasthis)
js_copy(J, 2);
else
js_pushundefined(J);
js_copy(J, -3);
js_pushnumber(J, k);
js_copy(J, 0);
js_call(J, 3);
if (js_toboolean(J, -1)) {
js_pop(J, 1);
js_setindex(J, -2, to++);
} else {
js_pop(J, 2);
}
}
}
}
void js_concat(js_State *J)
{
js_toprimitive(J, -2, JS_HNONE);
js_toprimitive(J, -1, JS_HNONE);
if (js_isstring(J, -2) || js_isstring(J, -1)) {
const char *sa = js_tostring(J, -2);
const char *sb = js_tostring(J, -1);
/* TODO: create js_String directly */
char *sab = js_malloc(J, strlen(sa) + strlen(sb) + 1);
strcpy(sab, sa);
strcat(sab, sb);
if (js_try(J)) {
js_free(J, sab);
js_throw(J);
}
js_pop(J, 2);
js_pushstring(J, sab);
js_endtry(J);
js_free(J, sab);
} else {
double x = js_tonumber(J, -2);
double y = js_tonumber(J, -1);
js_pop(J, 2);
js_pushnumber(J, x + y);
}
}
static int sortcmp(const void *avoid, const void *bvoid)
{
const struct sortslot *aslot = avoid, *bslot = bvoid;
const js_Value *a = &aslot->v, *b = &bslot->v;
js_State *J = aslot->J;
const char *sx, *sy;
int c;
int unx = (a->type == JS_TUNDEFINED);
int uny = (b->type == JS_TUNDEFINED);
if (unx) return !uny;
if (uny) return -1;
if (js_iscallable(J, 1)) {
js_copy(J, 1); /* copy function */
js_pushundefined(J);
js_pushvalue(J, *a);
js_pushvalue(J, *b);
js_call(J, 2);
c = js_tonumber(J, -1);
js_pop(J, 1);
} else {
js_pushvalue(J, *a);
js_pushvalue(J, *b);
sx = js_tostring(J, -2);
sy = js_tostring(J, -1);
c = strcmp(sx, sy);
js_pop(J, 2);
}
return c;
}
static void ToPropertyDescriptor(js_State *J, js_Object *obj, const char *name, js_Object *desc)
{
int haswritable = 0;
int hasvalue = 0;
int enumerable = 0;
int configurable = 0;
int writable = 0;
int atts = 0;
js_pushobject(J, obj);
js_pushobject(J, desc);
if (js_hasproperty(J, -1, "writable")) {
haswritable = 1;
writable = js_toboolean(J, -1);
js_pop(J, 1);
}
if (js_hasproperty(J, -1, "enumerable")) {
enumerable = js_toboolean(J, -1);
js_pop(J, 1);
}
if (js_hasproperty(J, -1, "configurable")) {
configurable = js_toboolean(J, -1);
js_pop(J, 1);
}
if (js_hasproperty(J, -1, "value")) {
hasvalue = 1;
js_setproperty(J, -3, name);
}
if (!writable) atts |= JS_READONLY;
if (!enumerable) atts |= JS_DONTENUM;
if (!configurable) atts |= JS_DONTCONF;
if (js_hasproperty(J, -1, "get")) {
if (haswritable || hasvalue)
js_typeerror(J, "value/writable and get/set attributes are exclusive");
} else {
js_pushundefined(J);
}
if (js_hasproperty(J, -2, "set")) {
if (haswritable || hasvalue)
js_typeerror(J, "value/writable and get/set attributes are exclusive");
} else {
js_pushundefined(J);
}
js_defaccessor(J, -4, name, atts);
js_pop(J, 2);
}
void js_construct(js_State *J, int n)
{
js_Object *obj;
js_Object *prototype;
js_Object *newobj;
if (!js_iscallable(J, -n-1))
js_typeerror(J, "called object is not a function");
obj = js_toobject(J, -n-1);
/* built-in constructors create their own objects, give them a 'null' this */
if (obj->type == JS_CCFUNCTION && obj->u.c.constructor) {
int savebot = BOT;
js_pushnull(J);
if (n > 0)
js_rot(J, n + 1);
BOT = TOP - n - 1;
jsR_pushtrace(J, obj->u.c.name, "[C]", 0);
jsR_callcfunction(J, n, obj->u.c.length, obj->u.c.constructor);
--J->tracetop;
BOT = savebot;
return;
}
/* extract the function object's prototype property */
js_getproperty(J, -n - 1, "prototype");
if (js_isobject(J, -1))
prototype = js_toobject(J, -1);
else
prototype = J->Object_prototype;
js_pop(J, 1);
/* create a new object with above prototype, and shift it into the 'this' slot */
newobj = jsV_newobject(J, JS_COBJECT, prototype);
js_pushobject(J, newobj);
if (n > 0)
js_rot(J, n + 1);
/* call the function */
js_call(J, n);
/* if result is not an object, return the original object we created */
if (!js_isobject(J, -1)) {
js_pop(J, 1);
js_pushobject(J, newobj);
}
}
int js_dostring(js_State *J, const char *source)
{
if (js_try(J)) {
fprintf(stderr, "%s\n", js_tostring(J, -1));
js_pop(J, 1);
return 1;
}
js_loadstring(J, "[string]", source);
js_pushglobal(J);
js_call(J, 0);
js_pop(J, 1);
js_endtry(J);
return 0;
}
int js_dofile(js_State *J, const char *filename)
{
if (js_try(J)) {
fprintf(stderr, "libjs: %s\n", js_tostring(J, -1));
js_pop(J, 1);
return 1;
}
js_loadfile(J, filename);
js_pushglobal(J);
js_call(J, 0);
js_pop(J, 1);
js_endtry(J);
return 0;
}
/* obj.valueOf() */
static int jsV_valueOf(js_State *J, js_Object *obj)
{
js_pushobject(J, obj);
js_getproperty(J, -1, "valueOf");
if (js_iscallable(J, -1)) {
js_rot2(J);
js_call(J, 0);
if (js_isprimitive(J, -1))
return 1;
js_pop(J, 1);
return 0;
}
js_pop(J, 2);
return 0;
}
int js_dostring(js_State *J, const char *source, int report)
{
if (js_try(J)) {
fprintf(stderr, "libjs: %s\n", js_tostring(J, -1));
js_pop(J, 1);
return 1;
}
js_loadstring(J, "(string)", source);
js_pushglobal(J);
js_call(J, 0);
if (report)
printf("%s\n", js_tostring(J, -1));
js_pop(J, 1);
js_endtry(J);
return 0;
}
void pdf_jsimp_addproperty(pdf_jsimp *imp, pdf_jsimp_type *type, char *name, pdf_jsimp_getter *get, pdf_jsimp_setter *set)
{
js_State *J = imp->J;
js_getregistry(J, (const char *)type);
{
js_newcfunction(J, wrapgetter, 0);
{
js_pushnull(J);
js_newuserdata(J, "getter", get);
js_defproperty(J, -2, "__get", JS_READONLY | JS_DONTENUM | JS_DONTCONF);
js_pushstring(J, (const char *)type);
js_defproperty(J, -2, "__type", JS_READONLY | JS_DONTENUM | JS_DONTCONF);
}
js_newcfunction(J, wrapsetter, 0);
{
js_pushnull(J);
js_newuserdata(J, "setter", set);
js_defproperty(J, -2, "__set", JS_READONLY | JS_DONTENUM | JS_DONTCONF);
js_pushstring(J, (const char *)type);
js_defproperty(J, -2, "__type", JS_READONLY | JS_DONTENUM | JS_DONTCONF);
}
js_defaccessor(J, -3, name, JS_READONLY | JS_DONTENUM | JS_DONTCONF);
}
js_pop(J, 1);
}
int js_instanceof(js_State *J)
{
js_Object *O, *V;
if (!js_iscallable(J, -1))
js_typeerror(J, "instanceof: invalid operand");
if (!js_isobject(J, -2))
return 0;
js_getproperty(J, -1, "prototype");
if (!js_isobject(J, -1))
js_typeerror(J, "instanceof: 'prototype' property is not an object");
O = js_toobject(J, -1);
js_pop(J, 1);
V = js_toobject(J, -2);
while (V) {
V = V->prototype;
if (O == V)
return 1;
}
return 0;
}
static int compare(js_State *J, unsigned int x, unsigned int y, int *hasx, int *hasy, int hasfn)
{
const char *sx, *sy;
int c;
*hasx = js_hasindex(J, 0, x);
*hasy = js_hasindex(J, 0, y);
if (*hasx && *hasy) {
int unx = js_isundefined(J, -2);
int uny = js_isundefined(J, -1);
if (unx && uny) return 0;
if (unx) return 1;
if (uny) return -1;
if (hasfn) {
js_copy(J, 1); /* copy function */
js_pushundefinedthis(J); /* set this object */
js_copy(J, -4); /* copy x */
js_copy(J, -4); /* copy y */
js_call(J, 2);
c = js_tonumber(J, -1);
js_pop(J, 1);
return c;
}
sx = js_tostring(J, -2);
sy = js_tostring(J, -1);
return strcmp(sx, sy);
}
if (*hasx) return -1;
if (*hasy) return 1;
return 0;
}
static void js_setvar(js_State *J, const char *name)
{
js_Environment *E = J->E;
do {
js_Property *ref = jsV_getproperty(J, E->variables, name);
if (ref) {
if (ref->setter) {
js_pushobject(J, ref->setter);
js_pushobject(J, E->variables);
js_copy(J, -3);
js_call(J, 1);
js_pop(J, 1);
return;
}
if (!(ref->atts & JS_READONLY))
ref->value = *stackidx(J, -1);
else if (J->strict)
js_typeerror(J, "'%s' is read-only", name);
return;
}
E = E->outer;
} while (E);
if (J->strict)
js_referenceerror(J, "assignment to undeclared variable '%s'", name);
jsR_setproperty(J, J->G, name, stackidx(J, -1));
}
static void Ap_forEach(js_State *J)
{
int hasthis = js_gettop(J) >= 3;
int k, len;
if (!js_iscallable(J, 1))
js_typeerror(J, "callback is not a function");
len = js_getlength(J, 0);
for (k = 0; k < len; ++k) {
if (js_hasindex(J, 0, k)) {
js_copy(J, 1);
if (hasthis)
js_copy(J, 2);
else
js_pushundefined(J);
js_copy(J, -3);
js_pushnumber(J, k);
js_copy(J, 0);
js_call(J, 3);
js_pop(J, 2);
}
}
js_pushundefined(J);
}
void js_newobjectx(js_State *J)
{
js_Object *prototype = NULL;
if (js_isobject(J, -1))
prototype = js_toobject(J, -1);
js_pop(J, 1);
js_pushobject(J, jsV_newobject(J, JS_COBJECT, prototype));
}
int js_getlength(js_State *J, int idx)
{
int len;
js_getproperty(J, idx, "length");
len = js_tointeger(J, -1);
js_pop(J, 1);
return len;
}
unsigned int js_getlength(js_State *J, int idx)
{
unsigned int len;
js_getproperty(J, idx, "length");
len = js_touint32(J, -1);
js_pop(J, 1);
return len;
}
static void Sp_replace_string(js_State *J)
{
const char *source, *needle, *s, *r;
js_Buffer *sb = NULL;
int n;
source = js_tostring(J, 0);
needle = js_tostring(J, 1);
s = strstr(source, needle);
if (!s) {
js_copy(J, 0);
return;
}
n = strlen(needle);
if (js_iscallable(J, 2)) {
js_copy(J, 2);
js_pushglobal(J);
js_pushlstring(J, s, n); /* arg 1: substring that matched */
js_pushnumber(J, s - source); /* arg 2: offset within search string */
js_copy(J, 0); /* arg 3: search string */
js_call(J, 3);
r = js_tostring(J, -1);
js_putm(J, &sb, source, s);
js_puts(J, &sb, r);
js_puts(J, &sb, s + n);
js_putc(J, &sb, 0);
js_pop(J, 1);
} else {
r = js_tostring(J, 2);
js_putm(J, &sb, source, s);
while (*r) {
if (*r == '$') {
switch (*(++r)) {
case '$': js_putc(J, &sb, '$'); break;
case '&': js_putm(J, &sb, s, s + n); break;
case '`': js_putm(J, &sb, source, s); break;
case '\'': js_puts(J, &sb, s + n); break;
default: js_putc(J, &sb, '$'); js_putc(J, &sb, *r); break;
}
++r;
} else {
js_putc(J, &sb, *r++);
}
}
js_puts(J, &sb, s + n);
js_putc(J, &sb, 0);
}
if (js_try(J)) {
js_free(J, sb);
js_throw(J);
}
js_pushstring(J, sb ? sb->s : "");
js_endtry(J);
js_free(J, sb);
}
int eval_print(js_State *J, const char *source)
{
if (js_ploadstring(J, "[string]", source)) {
fprintf(stderr, "%s\n", js_tostring(J, -1));
js_pop(J, 1);
return 1;
}
js_pushglobal(J);
if (js_pcall(J, 0)) {
fprintf(stderr, "%s\n", js_tostring(J, -1));
js_pop(J, 1);
return 1;
}
if (js_isdefined(J, -1))
printf("%s\n", js_tostring(J, -1));
js_pop(J, 1);
return 0;
}
static void wrapmethod(js_State *J)
{
pdf_jsimp_obj *args[MAXARGS];
pdf_jsimp_obj *ret;
pdf_jsimp_method *meth;
const char *type;
void *jsctx;
void *obj;
int i;
int argc = js_gettop(J) - 1;
js_getregistry(J, "jsctx");
jsctx = js_touserdata(J, "jsctx", -1);
js_pop(J, 1);
js_currentfunction(J);
{
js_getproperty(J, -1, "__call");
meth = js_touserdata(J, "method", -1);
js_pop(J, 1);
js_getproperty(J, -1, "__type");
type = js_tostring(J, -1);
js_pop(J, 1);
}
js_pop(J, 1);
if (js_isuserdata(J, type, 0))
obj = js_touserdata(J, type, 0);
else
obj = NULL;
if (argc > MAXARGS)
js_rangeerror(J, "too many arguments");
for (i = 0; i < argc; ++i)
args[i] = OBJ(i+1);
ret = meth(jsctx, obj, argc, args);
if (ret)
js_copy(J, IDX(ret));
else
js_pushundefined(J);
}
static void jsR_callfunction(js_State *J, unsigned int n, js_Function *F, js_Environment *scope)
{
js_Value v;
unsigned int i;
scope = jsR_newenvironment(J, jsV_newobject(J, JS_COBJECT, NULL), scope);
jsR_savescope(J, scope);
if (F->arguments) {
js_newobject(J);
if (!J->strict) {
js_currentfunction(J);
js_defproperty(J, -2, "callee", JS_DONTENUM);
}
js_pushnumber(J, n);
js_defproperty(J, -2, "length", JS_DONTENUM);
for (i = 0; i < n; ++i) {
js_copy(J, i + 1);
js_setindex(J, -2, i);
}
js_initvar(J, "arguments", -1);
js_pop(J, 1);
}
for (i = 0; i < F->numparams; ++i) {
if (i < n)
js_initvar(J, F->vartab[i], i + 1);
else {
js_pushundefined(J);
js_initvar(J, F->vartab[i], -1);
js_pop(J, 1);
}
}
js_pop(J, n);
jsR_run(J, F);
v = *stackidx(J, -1);
TOP = --BOT; /* clear stack */
js_pushvalue(J, v);
jsR_restorescope(J);
}
static int eval_print(js_State *J, const char *source)
{
if (js_ploadstring(J, "[stdin]", source)) {
fprintf(stderr, "%s\n", js_trystring(J, -1, "Error"));
js_pop(J, 1);
return 1;
}
js_pushundefined(J);
if (js_pcall(J, 0)) {
fprintf(stderr, "%s\n", js_trystring(J, -1, "Error"));
js_pop(J, 1);
return 1;
}
if (js_isdefined(J, -1)) {
printf("%s\n", js_tryrepr(J, -1, "can't convert to string"));
}
js_pop(J, 1);
return 0;
}
static void Ap_sort(js_State *J)
{
struct sortslot *array = NULL;
int i, n, len;
len = js_getlength(J, 0);
if (len <= 0) {
js_copy(J, 0);
return;
}
if (len >= INT_MAX / (int)sizeof(*array))
js_rangeerror(J, "array is too large to sort");
array = js_malloc(J, len * sizeof *array);
/* Holding objects where the GC cannot see them is illegal, but if we
* don't allow the GC to run we can use qsort() on a temporary array of
* js_Values for fast sorting.
*/
++J->gcpause;
if (js_try(J)) {
--J->gcpause;
js_free(J, array);
js_throw(J);
}
n = 0;
for (i = 0; i < len; ++i) {
if (js_hasindex(J, 0, i)) {
array[n].v = *js_tovalue(J, -1);
array[n].J = J;
js_pop(J, 1);
++n;
}
}
qsort(array, n, sizeof *array, sortcmp);
for (i = 0; i < n; ++i) {
js_pushvalue(J, array[i].v);
js_setindex(J, 0, i);
}
for (i = n; i < len; ++i) {
js_delindex(J, 0, i);
}
--J->gcpause;
js_endtry(J);
js_free(J, array);
js_copy(J, 0);
}
static void jsB_load(js_State *J)
{
int i, n = js_gettop(J);
for (i = 1; i < n; ++i) {
js_loadfile(J, js_tostring(J, i));
js_pushundefined(J);
js_call(J, 0);
js_pop(J, 1);
}
js_pushundefined(J);
}
static void Ap_join(js_State *J)
{
char * volatile out = NULL;
const char *sep;
const char *r;
unsigned int seplen;
unsigned int k, n, len;
len = js_getlength(J, 0);
if (js_isdefined(J, 1)) {
sep = js_tostring(J, 1);
seplen = strlen(sep);
} else {
sep = ",";
seplen = 1;
}
if (len == 0) {
js_pushliteral(J, "");
return;
}
if (js_try(J)) {
js_free(J, out);
js_throw(J);
}
n = 1;
for (k = 0; k < len; ++k) {
js_getindex(J, 0, k);
if (js_isundefined(J, -1) || js_isnull(J, -1))
r = "";
else
r = js_tostring(J, -1);
n += strlen(r);
if (k == 0) {
out = js_malloc(J, n);
strcpy(out, r);
} else {
n += seplen;
out = realloc(out, n);
strcat(out, sep);
strcat(out, r);
}
js_pop(J, 1);
}
js_pushstring(J, out);
js_endtry(J);
js_free(J, out);
}
