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Add ability to load file as Uint8Array in std.loadFile

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This commit is contained in:
Saúl Ibarra Corretgé 2024-12-02 11:15:02 +01:00
parent 5cfb0ec260
commit 517e9e274e
2 changed files with 40 additions and 21 deletions
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4
docs/docs/stdlib.md
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@ -348,11 +348,13 @@ optional properties:
Evaluate the file `filename` as a script (global eval). Evaluate the file `filename` as a script (global eval).
### `loadFile(filename)` ### `loadFile(filename, [options])`
Load the file `filename` and return it as a string assuming UTF-8 Load the file `filename` and return it as a string assuming UTF-8
encoding. Return `null` in case of I/O error. encoding. Return `null` in case of I/O error.
If `options.binary` is set to `true` a `Uint8Array` is returned instead.
### `open(filename, flags, errorObj = undefined)` ### `open(filename, flags, errorObj = undefined)`
Open a file (wrapper to the libc `fopen()`). Return the FILE Open a file (wrapper to the libc `fopen()`). Return the FILE

55
quickjs-libc.c
View file

@ -478,14 +478,41 @@ static JSValue js_loadScript(JSContext *ctx, JSValue this_val,
return ret; return ret;
} }
/* load a file as a UTF-8 encoded string */ static int get_bool_option(JSContext *ctx, BOOL *pbool,
JSValue obj,
const char *option)
{
JSValue val;
val = JS_GetPropertyStr(ctx, obj, option);
if (JS_IsException(val))
return -1;
if (!JS_IsUndefined(val)) {
*pbool = JS_ToBool(ctx, val);
}
JS_FreeValue(ctx, val);
return 0;
}
static void free_buf(JSRuntime *rt, void *opaque, void *ptr) {
js_free_rt(rt, ptr);
}
/* load a file as a UTF-8 encoded string or Uint8Array */
static JSValue js_std_loadFile(JSContext *ctx, JSValue this_val, static JSValue js_std_loadFile(JSContext *ctx, JSValue this_val,
int argc, JSValue *argv) int argc, JSValue *argv)
{ {
uint8_t *buf; uint8_t *buf;
const char *filename; const char *filename;
JSValue ret; JSValue ret, options_obj;
size_t buf_len; size_t buf_len;
BOOL binary = FALSE;
if (argc >= 2) {
options_obj = argv[1];
if (get_bool_option(ctx, &binary, options_obj,
"binary"))
return JS_EXCEPTION;
}
filename = JS_ToCString(ctx, argv[0]); filename = JS_ToCString(ctx, argv[0]);
if (!filename) if (!filename)
@ -494,8 +521,13 @@ static JSValue js_std_loadFile(JSContext *ctx, JSValue this_val,
JS_FreeCString(ctx, filename); JS_FreeCString(ctx, filename);
if (!buf) if (!buf)
return JS_NULL; return JS_NULL;
ret = JS_NewStringLen(ctx, (char *)buf, buf_len); if (binary) {
js_free(ctx, buf); ret = JS_NewUint8Array(ctx, buf, buf_len, free_buf, NULL, FALSE);
} else {
ret = JS_NewStringLen(ctx, (char *)buf, buf_len);
js_free(ctx, buf);
}
return ret; return ret;
} }
@ -822,21 +854,6 @@ static int interrupt_handler(JSRuntime *rt, void *opaque)
return (os_pending_signals >> SIGINT) & 1; return (os_pending_signals >> SIGINT) & 1;
} }
static int get_bool_option(JSContext *ctx, BOOL *pbool,
JSValue obj,
const char *option)
{
JSValue val;
val = JS_GetPropertyStr(ctx, obj, option);
if (JS_IsException(val))
return -1;
if (!JS_IsUndefined(val)) {
*pbool = JS_ToBool(ctx, val);
}
JS_FreeValue(ctx, val);
return 0;
}
static JSValue js_evalScript(JSContext *ctx, JSValue this_val, static JSValue js_evalScript(JSContext *ctx, JSValue this_val,
int argc, JSValue *argv) int argc, JSValue *argv)
{ {