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js: add mp.utils.append_file

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Also, for consistency with other APIs, mp.utils.{write,append}_file
now return true on success (and still throw on any error).
This commit is contained in:
Avi Halachmi (:avih) authored and avih committed 2021-06-13 22:53:37 +03:00
1 parent 03b9f8e323
commit bc9d556f3a
3 files changed
+23 -11
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player/javascript.c
+13 -9
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@@ -924,27 +924,31 @@ static void script_get_user_path(js_State *J, void *af)
js_pushstring(J, mp_get_user_path(af, jctx(J)->mpctx->global, path));
}
// args: prefixed file name, data (c-str)
static void script_write_file(js_State *J, void *af)
// args: is_append, prefixed file name, data (c-str)
static void script__write_file(js_State *J, void *af)
{
static const char *prefix = "file://";
const char *fname = js_tostring(J, 1);
const char *data = js_tostring(J, 2);
bool append = js_toboolean(J, 1);
const char *fname = js_tostring(J, 2);
const char *data = js_tostring(J, 3);
const char *opstr = append ? "append" : "write";
if (strstr(fname, prefix) != fname) // simple protection for incorrect use
js_error(J, "File name must be prefixed with '%s'", prefix);
fname += strlen(prefix);
fname = mp_get_user_path(af, jctx(J)->mpctx->global, fname);
MP_VERBOSE(jctx(J), "Writing file '%s'\n", fname);
MP_VERBOSE(jctx(J), "%s file '%s'\n", opstr, fname);
FILE *f = fopen(fname, "wb");
FILE *f = fopen(fname, append ? "ab" : "wb");
if (!f)
js_error(J, "Cannot open file for writing: '%s'", fname);
js_error(J, "Cannot open (%s) file: '%s'", opstr, fname);
add_af_file(af, f);
int len = strlen(data); // limited by terminating null
int wrote = fwrite(data, 1, len, f);
if (len != wrote)
js_error(J, "Cannot write to file: '%s'", fname);
js_error(J, "Cannot %s to file: '%s'", opstr, fname);
js_pushboolean(J, 1); // success. doesn't touch last_error
}
// args: env var name
@@ -1179,7 +1183,7 @@ static const struct fn_entry utils_fns[] = {
FN_ENTRY(get_env_list, 0),
FN_ENTRY(read_file, 2),
AF_ENTRY(write_file, 2),
AF_ENTRY(_write_file, 3),
FN_ENTRY(getenv, 1),
FN_ENTRY(compile_js, 2),
FN_ENTRY(_gc, 1),