455 lines
13 KiB
C
455 lines
13 KiB
C
#define BLOB_IMPLEMENTATION
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#include "blob.h"
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#include "qjs_blob.h"
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// Get countof from macros if not defined
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#ifndef countof
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#define countof(x) (sizeof(x)/sizeof((x)[0]))
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#endif
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// Free function for blob
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void blob_free(JSRuntime *rt, blob *b)
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{
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if (b) {
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blob_destroy(b);
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}
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}
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// Use QJSCLASS macro to generate class boilerplate
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QJSCLASS(blob,)
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// Constructor function for blob
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static JSValue js_blob_constructor(JSContext *ctx, JSValueConst new_target,
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int argc, JSValueConst *argv) {
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blob *bd = NULL;
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// new Blob()
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if (argc == 0) {
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// empty antestone blob
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bd = blob_new(0);
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}
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// new Blob(capacity)
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else if (argc == 1 && JS_IsNumber(argv[0])) {
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int64_t capacity_bits;
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if (JS_ToInt64(ctx, &capacity_bits, argv[0]) < 0) {
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return JS_EXCEPTION;
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}
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if (capacity_bits < 0) capacity_bits = 0;
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bd = blob_new((size_t)capacity_bits);
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}
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// new Blob(length, logical/random)
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else if (argc == 2 && JS_IsNumber(argv[0])) {
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int64_t length_bits;
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if (JS_ToInt64(ctx, &length_bits, argv[0]) < 0) {
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return JS_EXCEPTION;
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}
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if (length_bits < 0) length_bits = 0;
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if (JS_IsBool(argv[1])) {
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// Fill with all 0s or all 1s
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int is_one = JS_ToBool(ctx, argv[1]);
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bd = blob_new_with_fill((size_t)length_bits, is_one);
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} else if (JS_IsFunction(ctx, argv[1])) {
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/* Random function provided – call it for each bit */
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size_t bytes = (length_bits + 7) / 8;
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bd = blob_new((size_t)length_bits);
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if (bd) {
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bd->length = length_bits;
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/* Ensure the backing storage starts out zeroed */
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memset(bd->data, 0, bytes);
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for (size_t i = 0; i < length_bits; i++) {
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JSValue randval = JS_Call(ctx, argv[1], JS_UNDEFINED, 0, NULL);
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if (JS_IsException(randval)) {
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blob_destroy(bd);
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return JS_EXCEPTION;
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}
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int32_t fitval;
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JS_ToInt32(ctx, &fitval, randval);
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JS_FreeValue(ctx, randval);
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/* Compute which byte and which bit within that byte to set/clear */
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size_t byte_idx = i / 8;
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size_t bit_idx = i % 8;
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if (fitval & 1)
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bd->data[byte_idx] |= (uint8_t)(1 << bit_idx);
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else
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bd->data[byte_idx] &= (uint8_t)~(1 << bit_idx);
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}
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}
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} else {
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return JS_ThrowTypeError(ctx, "Second argument must be boolean or random function");
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}
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}
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// new Blob(blob, from, to)
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else if (argc >= 1 && JS_IsObject(argv[0])) {
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// we try copying from another blob if it's of the same class
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blob *src = js2blob(ctx, argv[0]);
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if (!src) {
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return JS_ThrowTypeError(ctx, "Blob constructor: argument 1 not a blob");
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}
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int64_t from = 0, to = (int64_t)src->length;
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if (argc >= 2 && JS_IsNumber(argv[1])) {
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JS_ToInt64(ctx, &from, argv[1]);
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if (from < 0) from = 0;
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}
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if (argc >= 3 && JS_IsNumber(argv[2])) {
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JS_ToInt64(ctx, &to, argv[2]);
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if (to < from) to = from;
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if (to > (int64_t)src->length) to = (int64_t)src->length;
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}
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bd = blob_new_from_blob(src, (size_t)from, (size_t)to);
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}
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// else fail
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else {
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return JS_ThrowTypeError(ctx, "Blob constructor: invalid arguments");
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}
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if (!bd) {
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return JS_ThrowOutOfMemory(ctx);
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}
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return blob2js(ctx, bd);
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}
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// blob.write_bit(logical)
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static JSValue js_blob_write_bit(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1) {
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return JS_ThrowTypeError(ctx, "write_bit(logical) requires 1 argument");
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}
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "write_bit: not called on a blob");
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}
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// Handle numeric 0/1 or boolean
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int bit_val;
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if (JS_IsNumber(argv[0])) {
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int32_t num;
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JS_ToInt32(ctx, &num, argv[0]);
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if (num != 0 && num != 1) {
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return JS_ThrowTypeError(ctx, "write_bit: value must be true, false, 0, or 1");
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}
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bit_val = num;
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} else {
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bit_val = JS_ToBool(ctx, argv[0]);
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}
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if (blob_write_bit(bd, bit_val) < 0) {
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return JS_ThrowTypeError(ctx, "write_bit: cannot write (maybe stone or OOM)");
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}
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return JS_UNDEFINED;
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}
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// blob.write_blob(second_blob)
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static JSValue js_blob_write_blob(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1) {
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return JS_ThrowTypeError(ctx, "write_blob(second_blob) requires 1 argument");
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}
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "write_blob: not called on a blob");
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}
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blob *second = js2blob(ctx, argv[0]);
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if (!second) {
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return JS_ThrowTypeError(ctx, "write_blob: argument must be a blob");
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}
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if (blob_write_blob(bd, second) < 0) {
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return JS_ThrowTypeError(ctx, "write_blob: cannot write to stone blob or OOM");
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}
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return JS_UNDEFINED;
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}
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// blob.write_dec64(number)
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static JSValue js_blob_write_number(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1) {
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return JS_ThrowTypeError(ctx, "write_dec64(number) requires 1 argument");
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}
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blob *bd = js2blob(ctx, this_val);
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if (!bd)
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return JS_ThrowTypeError(ctx, "write_dec64: not called on a blob");
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// Get the number as a double and convert to DEC64
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double d;
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if (JS_ToFloat64(ctx, &d, argv[0]) < 0)
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return JS_EXCEPTION;
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if (blob_write_dec64(bd, d) < 0)
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return JS_ThrowTypeError(ctx, "write_dec64: cannot write to stone blob or OOM");
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return JS_UNDEFINED;
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}
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// blob.write_kim(fit)
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static JSValue js_blob_write_text(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1)
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return JS_ThrowTypeError(ctx, "write_kim(fit) requires 1 argument");
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blob *bd = js2blob(ctx, this_val);
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if (!bd)
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return JS_ThrowTypeError(ctx, "write_kim: not called on a blob");
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// Handle number or single character string
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const char *str = JS_ToCString(ctx, argv[0]);
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if (blob_write_text(bd, str) < 0)
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return JS_ThrowTypeError(ctx, "write_kim: cannot write to stone blob or OOM");
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return JS_UNDEFINED;
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}
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// blob.write_pad(block_size)
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static JSValue js_blob_write_pad(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1)
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return JS_ThrowTypeError(ctx, "write_pad(block_size) requires 1 argument");
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blob *bd = js2blob(ctx, this_val);
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if (!bd)
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return JS_ThrowTypeError(ctx, "write_pad: not called on a blob");
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int32_t block_size;
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if (JS_ToInt32(ctx, &block_size, argv[0]) < 0) return JS_EXCEPTION;
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if (blob_write_pad(bd, block_size) < 0)
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return JS_ThrowTypeError(ctx, "write_pad: cannot write (stone blob, OOM, or invalid block size)");
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return JS_UNDEFINED;
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}
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// blob.read_logical(from)
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static JSValue js_blob_read_logical(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1) {
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return JS_ThrowTypeError(ctx, "read_logical(from) requires 1 argument");
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}
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "read_logical: not called on a blob");
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}
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int64_t pos;
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if (JS_ToInt64(ctx, &pos, argv[0]) < 0) {
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return JS_ThrowInternalError(ctx, "must provide a positive bit");
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}
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if (pos < 0) {
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return JS_ThrowRangeError(ctx, "read_logical: position must be non-negative");
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}
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int bit_val;
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if (blob_read_bit(bd, (size_t)pos, &bit_val) < 0) {
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return JS_ThrowTypeError(ctx, "read_logical: blob must be stone");
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}
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return JS_NewBool(ctx, bit_val);
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}
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// blob.read_blob(from, to)
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static JSValue js_blob_read_blob(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "read_blob: not called on a blob");
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}
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if (!bd->is_stone) {
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return JS_ThrowTypeError(ctx, "read_blob: blob must be stone");
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}
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int64_t from = 0;
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int64_t to = bd->length;
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if (argc >= 1) {
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if (JS_ToInt64(ctx, &from, argv[0]) < 0) return JS_EXCEPTION;
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if (from < 0) from = 0;
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}
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if (argc >= 2) {
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if (JS_ToInt64(ctx, &to, argv[1]) < 0) return JS_EXCEPTION;
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if (to > (int64_t)bd->length) to = bd->length;
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}
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blob *new_bd = blob_read_blob(bd, from, to);
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if (!new_bd) {
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return JS_ThrowOutOfMemory(ctx);
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}
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return blob2js(ctx, new_bd);
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}
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// blob.read_dec64(from)
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static JSValue js_blob_read_number(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 1) {
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return JS_ThrowTypeError(ctx, "read_dec64(from) requires 1 argument");
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}
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "read_number: not called on a blob");
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}
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if (!bd->is_stone) {
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return JS_ThrowTypeError(ctx, "read_number: blob must be stone");
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}
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double from;
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if (JS_ToFloat64(ctx, &from, argv[0]) < 0) return JS_EXCEPTION;
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if (from < 0) return JS_ThrowRangeError(ctx, "read_number: position must be non-negative");
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double d;
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if (blob_read_dec64(bd, from, &d) < 0) {
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return JS_ThrowRangeError(ctx, "read_number: out of range");
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}
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return JS_NewFloat64(ctx, d);
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}
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// blob.read_text(from)
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static JSValue js_blob_read_text(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "read_text: not called on a blob");
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}
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if (!bd->is_stone) {
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return JS_ThrowTypeError(ctx, "read_text: blob must be stone");
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}
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int64_t from;
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if (JS_ToInt64(ctx, &from, argv[0]) < 0) return JS_EXCEPTION;
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char *text;
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size_t bits_read;
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if (blob_read_text(bd, from, &text, &bits_read) < 0) {
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return JS_ThrowRangeError(ctx, "read_text: out of range or invalid encoding");
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}
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JSValue result = JS_NewString(ctx, text);
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free(text);
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return result;
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}
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// blob.pad?(from, block_size)
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static JSValue js_blob_pad_q(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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if (argc < 2) {
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return JS_ThrowTypeError(ctx, "pad?(from, block_size) requires 2 arguments");
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}
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "pad?: not called on a blob");
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}
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if (!bd->is_stone) {
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return JS_ThrowTypeError(ctx, "pad?: blob must be stone");
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}
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int64_t from;
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int32_t block_size;
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if (JS_ToInt64(ctx, &from, argv[0]) < 0) return JS_EXCEPTION;
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if (JS_ToInt32(ctx, &block_size, argv[1]) < 0) return JS_EXCEPTION;
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return JS_NewBool(ctx, blob_pad_check(bd, from, block_size));
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}
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// blob.stone()
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static JSValue js_blob_stone(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv) {
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "stone: not called on a blob");
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}
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if (!bd->is_stone) {
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blob_make_stone(bd);
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}
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return JS_UNDEFINED;
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}
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// blob.length getter
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// Return number of bits in the blob
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static JSValue js_blob_get_length(JSContext *ctx, JSValueConst this_val, int magic) {
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blob *bd = js2blob(ctx, this_val);
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if (!bd) {
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return JS_ThrowTypeError(ctx, "length: not called on a blob");
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}
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return JS_NewInt64(ctx, bd->length);
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}
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// -----------------------------------------------------------------------------
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// Exports list
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// -----------------------------------------------------------------------------
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static const JSCFunctionListEntry js_blob_funcs[] = {
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// Write methods
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JS_CFUNC_DEF("write_bit", 1, js_blob_write_bit),
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JS_CFUNC_DEF("write_blob", 1, js_blob_write_blob),
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JS_CFUNC_DEF("write_number", 1, js_blob_write_number),
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JS_CFUNC_DEF("write_text", 1, js_blob_write_text),
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JS_CFUNC_DEF("write_pad", 1, js_blob_write_pad),
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// Read methods
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JS_CFUNC_DEF("read_logical", 1, js_blob_read_logical),
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JS_CFUNC_DEF("read_blob", 2, js_blob_read_blob),
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JS_CFUNC_DEF("read_number", 1, js_blob_read_number),
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JS_CFUNC_DEF("read_text", 1, js_blob_read_text),
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JS_CFUNC_DEF("pad?", 2, js_blob_pad_q),
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// Other methods
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JS_CFUNC_DEF("stone", 0, js_blob_stone),
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// Length property getter
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JS_CGETSET_DEF("length", js_blob_get_length, NULL),
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};
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// -----------------------------------------------------------------------------
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// js_blob_use(ctx) for easy embedding: returns an object with the blob functions
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// -----------------------------------------------------------------------------
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JSValue js_blob_use(JSContext *js) {
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// Register the blob class
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QJSCLASSPREP_FUNCS(blob);
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// Create the constructor function
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JSValue ctor = JS_NewCFunction2(js, js_blob_constructor, "blob", 3, JS_CFUNC_constructor, 0);
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// Set the prototype on the constructor
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JSValue proto = JS_GetClassProto(js, js_blob_id);
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JS_SetConstructor(js, ctor, proto);
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JS_FreeValue(js, proto);
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return ctor;
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}
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JSValue js_new_blob_stoned_copy(JSContext *js, void *data, size_t bytes)
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{
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blob *b = blob_new(bytes*8);
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memcpy(b->data, data, bytes);
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b->length = bytes * 8; // Set the actual length in bits
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blob_make_stone(b);
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return blob2js(js, b);
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}
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void *js_get_blob_data(JSContext *js, size_t *size, JSValue v)
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{
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blob *b = js2blob(js, v);
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if (!b || !b->is_stone)
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return NULL;
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*size = (b->length + 7) / 8; // Return actual byte size based on bit length
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return b->data;
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}
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int js_is_blob(JSContext *js, JSValue v)
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{
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blob *b = js2blob(js,v);
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if (b) return 1;
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return 0;
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}
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