From 721119e4a61cbb261b456dfd134811d7beb5ce98 Mon Sep 17 00:00:00 2001 From: Simon Tatham Date: Tue, 5 Sep 2017 20:48:42 +0100 Subject: Support for loading games in Javascript puzzles. This is done by showing a dialog containing an through which the user can 'upload' a save file - though, of course, the 'upload' doesn't go to any HTTP server, but only into the mind of the Javascript running in the same browser. It would be even nicer to support drag-and-drop as an alternative UI for getting the save file into the browser, but that isn't critical to getting the first version of this feature out of the door. --- emcc.c | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) (limited to 'emcc.c') diff --git a/emcc.c b/emcc.c index 26e1ac2..e25fdf8 100644 --- a/emcc.c +++ b/emcc.c @@ -766,9 +766,9 @@ struct savefile_write_ctx { size_t pos; }; -static void savefile_write(void *wctx, void *buf, int len) +static void savefile_write(void *vctx, void *buf, int len) { - struct savefile_write_ctx *ctx = (struct savefile_write_ctx *)wctx; + struct savefile_write_ctx *ctx = (struct savefile_write_ctx *)vctx; if (ctx->buffer) memcpy(ctx->buffer + ctx->pos, buf, len); ctx->pos += len; @@ -799,6 +799,40 @@ void free_save_file(char *buffer) sfree(buffer); } +struct savefile_read_ctx { + const char *buffer; + int len_remaining; +}; + +static int savefile_read(void *vctx, void *buf, int len) +{ + struct savefile_read_ctx *ctx = (struct savefile_read_ctx *)vctx; + if (ctx->len_remaining < len) + return FALSE; + memcpy(buf, ctx->buffer, len); + ctx->len_remaining -= len; + ctx->buffer += len; + return TRUE; +} + +void load_game(const char *buffer, int len) +{ + struct savefile_read_ctx ctx; + const char *err; + + ctx.buffer = buffer; + ctx.len_remaining = len; + err = midend_deserialise(me, savefile_read, &ctx); + + if (err) { + js_error_box(err); + } else { + select_appropriate_preset(); + resize(); + midend_redraw(me); + } +} + /* ---------------------------------------------------------------------- * Setup function called at page load time. It's called main() because * that's the most convenient thing in Emscripten, but it's not main() -- cgit v1.1