Add `core:log` support for js/wasm

Also add #panic when importing `core:os` on wasm.

1 files changed, 119 insertions, 0 deletions

diff --git a/core/log/console_logger_js.odin b/core/log/console_logger_js.odin
new file mode 100644
index 000000000..1e07b6cdc
--- /dev/null
+++ b/core/log/console_logger_js.odin
@@ -0,0 +1,119 @@
+#+build js
+package log
+
+import "core:fmt"
+import "core:strings"
+import "core:time"
+
+Level_Headers := [?]string{
+	 0..<10 = "[DEBUG] --- ",
+	10..<20 = "[INFO ] --- ",
+	20..<30 = "[WARN ] --- ",
+	30..<40 = "[ERROR] --- ",
+	40..<50 = "[FATAL] --- ",
+}
+
+Default_Console_Logger_Opts :: Options{
+	.Level,
+	.Short_File_Path,
+	.Line,
+	.Procedure,
+} | Full_Timestamp_Opts
+
+Console_Logger_Data :: struct {
+	ident: string,
+}
+
+create_console_logger :: proc(lowest := Level.Debug, opt := Default_Console_Logger_Opts, ident := "", allocator := context.allocator) -> Logger {
+	data := new(Console_Logger_Data, allocator)
+	data.ident = strings.clone(ident)
+	return Logger{console_logger_proc, data, lowest, opt}
+}
+
+destroy_console_logger :: proc(log: Logger, allocator := context.allocator) {
+	data := cast(^Console_Logger_Data)log.data
+	delete(data.ident)
+	free(log.data, allocator)
+}
+
+console_logger_proc :: proc(logger_data: rawptr, level: Level, text: string, options: Options, location := #caller_location) {
+	options := options
+	data := cast(^Console_Logger_Data)logger_data
+
+	backing: [1024]byte //NOTE(Hoej): 1024 might be too much for a header backing, unless somebody has really long paths.
+	buf := strings.builder_from_bytes(backing[:])
+
+	if .Level in options {
+		fmt.sbprint(&buf, Level_Headers[level])
+	}
+
+	when time.IS_SUPPORTED {
+		do_time_header(options, &buf, time.now())
+	}
+
+	do_location_header(options, &buf, location)
+
+	if data.ident != "" {
+		fmt.sbprintf(&buf, "[%s] ", data.ident)
+	}
+
+	h := fmt.stderr if level >= .Error else fmt.stdout
+
+	//TODO(Hoej): When we have better atomics and such, make this thread-safe
+	fmt.fprintf(h, "%s%s\n", strings.to_string(buf), text)
+}
+
+do_time_header :: proc(opts: Options, buf: ^strings.Builder, t: time.Time) {
+	when time.IS_SUPPORTED {
+		if Full_Timestamp_Opts & opts != nil {
+			fmt.sbprint(buf, "[")
+			y, m, d := time.date(t)
+			h, min, s := time.clock(t)
+			if .Date in opts {
+				fmt.sbprintf(buf, "%d-%02d-%02d", y, m, d)
+				if .Time in opts {
+					fmt.sbprint(buf, " ")
+				}
+			}
+			if .Time in opts { fmt.sbprintf(buf, "%02d:%02d:%02d", h, min, s) }
+			fmt.sbprint(buf, "] ")
+		}
+	}
+}
+
+do_location_header :: proc(opts: Options, buf: ^strings.Builder, location := #caller_location) {
+	if Location_Header_Opts & opts == nil {
+		return
+	}
+	fmt.sbprint(buf, "[")
+
+	file := location.file_path
+	if .Short_File_Path in opts {
+		last := 0
+		for r, i in location.file_path {
+			if r == '/' {
+				last = i+1
+			}
+		}
+		file = location.file_path[last:]
+	}
+
+	if Location_File_Opts & opts != nil {
+		fmt.sbprint(buf, file)
+	}
+	if .Line in opts {
+		if Location_File_Opts & opts != nil {
+			fmt.sbprint(buf, ":")
+		}
+		fmt.sbprint(buf, location.line)
+	}
+
+	if .Procedure in opts {
+		if (Location_File_Opts | {.Line}) & opts != nil {
+			fmt.sbprint(buf, ":")
+		}
+		fmt.sbprintf(buf, "%s()", location.procedure)
+	}
+
+	fmt.sbprint(buf, "] ")
+}
\ No newline at end of file