Page MenuHomePhorge
Files F3050559

blob.c
No OneTemporary
Actions

Size
15 KB
Referenced Files
None
Subscribers
None

blob.c
View Options

#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <time.h>
#include <ctype.h>
#include <stdio.h>
#include "ant.h"
#include "errors.h"
#include "runtime.h"
#include "internal.h"
#include "descriptors.h"
#include "modules/blob.h"
#include "modules/buffer.h"
#include "modules/symbol.h"
#include "streams/readable.h"
ant_value_t g_blob_proto = 0;
ant_value_t g_file_proto = 0;
bool blob_is_blob(ant_t *js, ant_value_t obj) {
int id = js_brand_id(obj);
return id == BRAND_BLOB || id == BRAND_FILE;
}
blob_data_t *blob_get_data(ant_value_t obj) {
ant_value_t slot = js_get_slot(obj, SLOT_DATA);
if (vtype(slot) != T_NUM) return NULL;
return (blob_data_t *)(uintptr_t)(size_t)js_getnum(slot);
}
static blob_data_t *blob_data_new(const uint8_t *data, size_t size, const char *type) {
blob_data_t *bd = calloc(1, sizeof(blob_data_t));
if (!bd) return NULL;
if (size > 0 && data) {
bd->data = malloc(size);
if (!bd->data) { free(bd); return NULL; }
memcpy(bd->data, data, size);
}
bd->size = size;
bd->type = type ? strdup(type) : strdup("");
return bd;
}
static char *normalize_mime_type(const char *s) {
if (!s) return strdup("");
for (const unsigned char *p = (const unsigned char *)s; *p; p++) {
if (*p < 0x20 || *p > 0x7E) return strdup("");
}
size_t len = strlen(s);
char *out = malloc(len + 1);
if (!out) return strdup("");
for (size_t i = 0; i <= len; i++) out[i] = (char)tolower((unsigned char)s[i]);
return out;
}
typedef struct {
uint8_t *buf;
size_t size;
size_t cap;
} byte_buf_t;
static bool byte_buf_grow(byte_buf_t *b, size_t extra) {
size_t needed = b->size + extra;
if (needed <= b->cap) return true;
size_t new_cap = b->cap ? b->cap * 2 : 64;
while (new_cap < needed) new_cap *= 2;
uint8_t *p = realloc(b->buf, new_cap);
if (!p) return false;
b->buf = p;
b->cap = new_cap;
return true;
}
static bool byte_buf_append(byte_buf_t *b, const uint8_t *data, size_t len) {
if (!byte_buf_grow(b, len)) return false;
memcpy(b->buf + b->size, data, len);
b->size += len;
return true;
}
static ant_value_t process_blob_part(ant_t *js, byte_buf_t *buf, ant_value_t part) {
uint8_t t = vtype(part);
if (t == T_TYPEDARRAY) {
TypedArrayData *ta = (TypedArrayData *)js_gettypedarray(part);
if (!ta || !ta->buffer) return js_mkundef();
if (!byte_buf_append(buf, ta->buffer->data + ta->byte_offset, ta->byte_length))
return js_mkerr(js, "out of memory");
return js_mkundef();
}
if (t == T_OBJ) {
ant_value_t buf_slot = js_get_slot(part, SLOT_BUFFER);
if (vtype(buf_slot) == T_TYPEDARRAY) {
TypedArrayData *ta = (TypedArrayData *)js_gettypedarray(buf_slot);
if (ta && ta->buffer && !ta->buffer->is_detached) {
if (!byte_buf_append(buf, ta->buffer->data + ta->byte_offset, ta->byte_length))
return js_mkerr(js, "out of memory");
}
return js_mkundef();
}
if (vtype(buf_slot) == T_NUM) {
ArrayBufferData *abd = (ArrayBufferData *)(uintptr_t)(size_t)js_getnum(buf_slot);
if (abd && !abd->is_detached) {
if (!byte_buf_append(buf, abd->data, abd->length))
return js_mkerr(js, "out of memory");
return js_mkundef();
}
}
blob_data_t *bd = blob_get_data(part);
if (bd && bd->size > 0) {
if (!byte_buf_append(buf, bd->data, bd->size))
return js_mkerr(js, "out of memory");
return js_mkundef();
}
}
ant_value_t str = (t == T_STR) ? part : js_tostring_val(js, part);
if (is_err(str)) return str;
size_t len;
char *s = js_getstr(js, str, &len);
if (s && len > 0) {
if (!byte_buf_append(buf, (const uint8_t *)s, len))
return js_mkerr(js, "out of memory");
}
return js_mkundef();
}
static ant_value_t process_blob_parts(ant_t *js, byte_buf_t *buf, ant_value_t parts) {
uint8_t t = vtype(parts);
if (t == T_UNDEF || t == T_NULL) return js_mkundef();
if (t != T_OBJ && t != T_ARR && t != T_FUNC)
return js_mkerr_typed(js, JS_ERR_TYPE,
"Failed to construct 'Blob': The provided value cannot be converted to a sequence.");
js_iter_t it;
if (!js_iter_open(js, parts, &it))
return js_mkerr_typed(js, JS_ERR_TYPE, "Failed to construct 'Blob': The provided value is not of type 'BlobPart'");
ant_value_t value;
while (js_iter_next(js, &it, &value)) {
ant_value_t r = process_blob_part(js, buf, value);
if (is_err(r)) { js_iter_close(js, &it); return r; }
}
return js_mkundef();
}
static void blob_finalize(ant_t *js, ant_object_t *obj) {
if (!obj->extra_slots) return;
ant_extra_slot_t *entries = (ant_extra_slot_t *)obj->extra_slots;
for (uint8_t i = 0; i < obj->extra_count; i++) {
if (entries[i].slot == SLOT_DATA && vtype(entries[i].value) == T_NUM) {
blob_data_t *bd = (blob_data_t *)(uintptr_t)(size_t)js_getnum(entries[i].value);
if (bd) { free(bd->data); free(bd->type); free(bd->name); free(bd); }
return;
}}
}
ant_value_t blob_create(ant_t *js, const uint8_t *data, size_t size, const char *type) {
blob_data_t *bd = blob_data_new(data, size, type);
if (!bd) return js_mkerr(js, "out of memory");
ant_value_t obj = js_mkobj(js);
js_set_proto_init(obj, g_blob_proto);
js_set_slot(obj, SLOT_BRAND, js_mknum(BRAND_BLOB));
js_set_slot(obj, SLOT_DATA, ANT_PTR(bd));
js_set_finalizer(obj, blob_finalize);
return obj;
}
static ant_value_t blob_get_size(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
return js_mknum(bd ? (double)bd->size : 0);
}
static ant_value_t blob_get_type(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
if (!bd || !bd->type) return js_mkstr(js, "", 0);
return js_mkstr(js, bd->type, strlen(bd->type));
}
static ant_value_t file_get_name(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
if (!bd || !bd->name) return js_mkstr(js, "", 0);
return js_mkstr(js, bd->name, strlen(bd->name));
}
static ant_value_t file_get_last_modified(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
return js_mknum(bd ? (double)bd->last_modified : 0);
}
static ant_value_t js_blob_text(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
ant_value_t promise = js_mkpromise(js);
ant_value_t str = (!bd || bd->size == 0)
? js_mkstr(js, "", 0)
: js_mkstr(js, (const char *)bd->data, bd->size);
js_resolve_promise(js, promise, str);
return promise;
}
static ant_value_t js_blob_array_buffer(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
ant_value_t promise = js_mkpromise(js);
size_t sz = (bd && bd->data) ? bd->size : 0;
ArrayBufferData *abd = create_array_buffer_data(sz);
if (!abd) { js_reject_promise(js, promise, js_mkerr(js, "out of memory")); return promise; }
if (sz > 0 && bd) memcpy(abd->data, bd->data, sz);
js_resolve_promise(js, promise, create_arraybuffer_obj(js, abd));
return promise;
}
static ant_value_t js_blob_bytes(ant_t *js, ant_value_t *args, int nargs) {
(void)args; (void)nargs;
blob_data_t *bd = blob_get_data(js->this_val);
ant_value_t promise = js_mkpromise(js);
size_t sz = (bd && bd->data) ? bd->size : 0;
ArrayBufferData *abd = create_array_buffer_data(sz);
if (!abd) { js_reject_promise(js, promise, js_mkerr(js, "out of memory")); return promise; }
if (sz > 0 && bd) memcpy(abd->data, bd->data, sz);
js_resolve_promise(js, promise,
create_typed_array(js, TYPED_ARRAY_UINT8, abd, 0, sz, "Uint8Array"));
return promise;
}
static ant_value_t js_blob_slice(ant_t *js, ant_value_t *args, int nargs) {
blob_data_t *bd = blob_get_data(js->this_val);
size_t blob_size = bd ? bd->size : 0;
ssize_t start = 0;
if (nargs >= 1 && vtype(args[0]) != T_UNDEF) {
double d = js_to_number(js, args[0]);
start = (ssize_t)d;
if (start < 0) start = (ssize_t)blob_size + start;
if (start < 0) start = 0;
if ((size_t)start > blob_size) start = (ssize_t)blob_size;
}
ssize_t end = (ssize_t)blob_size;
if (nargs >= 2 && vtype(args[1]) != T_UNDEF) {
double d = js_to_number(js, args[1]);
end = (ssize_t)d;
if (end < 0) end = (ssize_t)blob_size + end;
if (end < 0) end = 0;
if ((size_t)end > blob_size) end = (ssize_t)blob_size;
}
if (end < start) end = start;
size_t new_size = (size_t)(end - start);
const uint8_t *src = (bd && bd->data && new_size > 0) ? (bd->data + start) : NULL;
const char *new_type = (bd && bd->type) ? bd->type : "";
char *type_owned = NULL;
if (nargs >= 3 && vtype(args[2]) != T_UNDEF) {
ant_value_t tv = args[2];
if (vtype(tv) != T_STR) { tv = js_tostring_val(js, tv); if (is_err(tv)) return tv; }
type_owned = normalize_mime_type(js_getstr(js, tv, NULL));
new_type = type_owned;
}
ant_value_t result = blob_create(js, src, new_size, new_type);
free(type_owned);
return result;
}
static ant_value_t blob_stream_pull(ant_t *js, ant_value_t *args, int nargs) {
ant_value_t blob_obj = js_get_slot(js->current_func, SLOT_DATA);
blob_data_t *bd = blob_get_data(blob_obj);
ant_value_t ctrl = (nargs > 0) ? args[0] : js_mkundef();
if (bd && bd->size > 0 && bd->data) {
ArrayBufferData *ab = create_array_buffer_data(bd->size);
if (ab) {
memcpy(ab->data, bd->data, bd->size);
rs_controller_enqueue(js, ctrl, create_typed_array(js, TYPED_ARRAY_UINT8, ab, 0, bd->size, "Uint8Array"));
}}
rs_controller_close(js, ctrl);
return js_mkundef();
}
static ant_value_t js_blob_stream(ant_t *js, ant_value_t *args, int nargs) {
ant_value_t pull_fn = js_heavy_mkfun(js, blob_stream_pull, js->this_val);
return rs_create_stream(js, pull_fn, js_mkundef(), 1);
}
static ant_value_t js_blob_ctor(ant_t *js, ant_value_t *args, int nargs) {
if (vtype(js->new_target) == T_UNDEF)
return js_mkerr_typed(js, JS_ERR_TYPE, "Blob constructor requires 'new'");
byte_buf_t buf = {NULL, 0, 0};
if (nargs >= 1 && vtype(args[0]) != T_UNDEF) {
uint8_t pt = vtype(args[0]);
if (pt != T_OBJ && pt != T_ARR && pt != T_FUNC)
return js_mkerr_typed(js, JS_ERR_TYPE,
"Failed to construct 'Blob': The provided value cannot be converted to a sequence.");
ant_value_t r = process_blob_parts(js, &buf, args[0]);
if (is_err(r)) { free(buf.buf); return r; }
}
const char *type_str = "";
char *type_owned = NULL;
if (nargs >= 2 && vtype(args[1]) != T_UNDEF && vtype(args[1]) != T_NULL) {
uint8_t ot = vtype(args[1]);
if (ot != T_OBJ && ot != T_ARR && ot != T_FUNC && ot != T_CFUNC) {
free(buf.buf);
return js_mkerr_typed(js, JS_ERR_TYPE,
"Failed to construct 'Blob': The 'options' argument is not an object.");
}
// access "endings" before "type" per lexicographic order (WPT requirement)
(void)js_get(js, args[1], "endings");
ant_value_t type_v = js_get(js, args[1], "type");
if (vtype(type_v) != T_UNDEF) {
if (vtype(type_v) != T_STR) {
type_v = js_tostring_val(js, type_v);
if (is_err(type_v)) { free(buf.buf); return type_v; }
}
type_owned = normalize_mime_type(js_getstr(js, type_v, NULL));
type_str = type_owned;
}
}
blob_data_t *bd = blob_data_new(buf.buf, buf.size, type_str);
free(buf.buf); free(type_owned);
if (!bd) return js_mkerr(js, "out of memory");
ant_value_t obj = js_mkobj(js);
ant_value_t proto = js_instance_proto_from_new_target(js, g_blob_proto);
if (is_object_type(proto)) js_set_proto_init(obj, proto);
js_set_slot(obj, SLOT_BRAND, js_mknum(BRAND_BLOB));
js_set_slot(obj, SLOT_DATA, ANT_PTR(bd));
js_set_finalizer(obj, blob_finalize);
return obj;
}
static ant_value_t js_file_ctor(ant_t *js, ant_value_t *args, int nargs) {
if (vtype(js->new_target) == T_UNDEF)
return js_mkerr_typed(js, JS_ERR_TYPE, "File constructor requires 'new'");
if (nargs < 2)
return js_mkerr_typed(js, JS_ERR_TYPE, "File constructor requires at least 2 arguments");
byte_buf_t buf = {NULL, 0, 0};
if (vtype(args[0]) != T_UNDEF) {
uint8_t pt = vtype(args[0]);
if (pt != T_OBJ && pt != T_ARR && pt != T_FUNC) {
return js_mkerr_typed(js, JS_ERR_TYPE,
"Failed to construct 'File': The provided value cannot be converted to a sequence.");
}
ant_value_t r = process_blob_parts(js, &buf, args[0]);
if (is_err(r)) { free(buf.buf); return r; }
}
ant_value_t name_v = args[1];
if (vtype(name_v) != T_STR) {
name_v = js_tostring_val(js, name_v);
if (is_err(name_v)) { free(buf.buf); return name_v; }
}
const char *name_str = js_getstr(js, name_v, NULL);
const char *type_str = "";
char *type_owned = NULL;
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
int64_t last_modified = (int64_t)ts.tv_sec * 1000LL + (int64_t)(ts.tv_nsec / 1000000);
if (nargs >= 3 && vtype(args[2]) != T_UNDEF && vtype(args[2]) != T_NULL) {
ant_value_t opts = args[2];
uint8_t ot = vtype(opts);
if (ot == T_OBJ || ot == T_ARR) {
ant_value_t type_v = js_get(js, opts, "type");
if (vtype(type_v) != T_UNDEF) {
if (vtype(type_v) != T_STR) {
type_v = js_tostring_val(js, type_v);
if (is_err(type_v)) { free(buf.buf); return type_v; }
}
type_owned = normalize_mime_type(js_getstr(js, type_v, NULL));
type_str = type_owned;
}
ant_value_t lm_v = js_get(js, opts, "lastModified");
if (vtype(lm_v) != T_UNDEF) {
double d = js_to_number(js, lm_v);
if (d == d) last_modified = (int64_t)d;
}
}
}
blob_data_t *bd = blob_data_new(buf.buf, buf.size, type_str);
free(buf.buf); free(type_owned);
if (!bd) return js_mkerr(js, "out of memory");
bd->name = strdup(name_str ? name_str : "");
bd->last_modified = last_modified;
ant_value_t obj = js_mkobj(js);
ant_value_t proto = js_instance_proto_from_new_target(js, g_file_proto);
if (is_object_type(proto)) js_set_proto_init(obj, proto);
js_set_slot(obj, SLOT_BRAND, js_mknum(BRAND_FILE));
js_set_slot(obj, SLOT_DATA, ANT_PTR(bd));
js_set_finalizer(obj, blob_finalize);
return obj;
}
void init_blob_module(void) {
ant_t *js = rt->js;
ant_value_t g = js_glob(js);
g_blob_proto = js_mkobj(js);
js_set_getter_desc(js, g_blob_proto, "size", 4, js_mkfun(blob_get_size), JS_DESC_C);
js_set_getter_desc(js, g_blob_proto, "type", 4, js_mkfun(blob_get_type), JS_DESC_C);
js_set(js, g_blob_proto, "text", js_mkfun(js_blob_text));
js_set(js, g_blob_proto, "arrayBuffer", js_mkfun(js_blob_array_buffer));
js_set(js, g_blob_proto, "bytes", js_mkfun(js_blob_bytes));
js_set(js, g_blob_proto, "slice", js_mkfun(js_blob_slice));
js_set(js, g_blob_proto, "stream", js_mkfun(js_blob_stream));
js_set_sym(js, g_blob_proto, get_toStringTag_sym(), js_mkstr(js, "Blob", 4));
ant_value_t blob_ctor = js_make_ctor(js, js_blob_ctor, g_blob_proto, "Blob", 4);
js_set(js, g, "Blob", blob_ctor);
js_set_descriptor(js, g, "Blob", 4, JS_DESC_W | JS_DESC_C);
g_file_proto = js_mkobj(js);
js_set_proto_init(g_file_proto, g_blob_proto);
js_set_getter_desc(js, g_file_proto, "name", 4, js_mkfun(file_get_name), JS_DESC_C);
js_set_getter_desc(js, g_file_proto, "lastModified", 12, js_mkfun(file_get_last_modified), JS_DESC_C);
js_set_sym(js, g_file_proto, get_toStringTag_sym(), js_mkstr(js, "File", 4));
ant_value_t file_ctor = js_make_ctor(js, js_file_ctor, g_file_proto, "File", 4);
js_set(js, g, "File", file_ctor);
js_set_descriptor(js, g, "File", 4, JS_DESC_W | JS_DESC_C);
}

File Metadata

Mime Type
text/x-c
Expires
Fri, Apr 3, 2:43 PM (1 d, 23 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
520968
Default Alt Text
blob.c (15 KB)

Event Timeline