more lsp, start json parser

1 files changed, 110 insertions, 1 deletions

diff --git a/lsp.c b/lsp.c
index 2c94dfa..c35b691 100644
--- a/lsp.c
+++ b/lsp.c
@@ -2,7 +2,105 @@ typedef struct {
 	Process process;
 } LSP;
 
-static void send_message(LSP *lsp, const char *content, size_t content_size) {
+typedef struct {
+	u32 pos;
+	u32 len;
+} JSONString;
+
+typedef struct JSONValue JSONValue;
+
+typedef struct {
+	u32 len;
+	u32 properties;
+	u32 values;
+} JSONObject;
+
+typedef struct {
+	u32 len;
+	u32 values;
+} JSONArray;
+
+enum {
+	JSON_NULL,
+	JSON_FALSE,
+	JSON_TRUE,
+	JSON_NUMBER,
+	JSON_STRING,
+	JSON_OBJECT,
+	JSON_ARRAY
+};
+
+struct JSONValue {
+	u8 type;
+	union {
+		double number;
+		JSONString string;
+		JSONArray array;
+		JSONObject object;
+	} val;
+};
+
+
+typedef struct {
+	const char *text;
+	// root = values[0]
+	JSONValue *values;
+} JSON;
+
+static bool json_parse_value(JSON *json, u32 *p_index, JSONValue *val) {
+	const char *text = json->text;
+	u32 index = *p_index;
+	while (isspace(text[index])) ++index;
+	switch (text[index]) {
+	case '{':
+		val->type = JSON_OBJECT;
+		json_parse_object(json, &index, &val->val.object);
+		break;
+	case '[':
+		val->type = JSON_ARRAY;
+		json_parse_array(json, &index, &val->val.array);
+		break;
+	case '"':
+		val->type = JSON_STRING;
+		json_parse_string(json, &index, &val->val.string);
+		break;
+	case ANY_DIGIT:
+		json_parse_number(json, &index, &val->val.number);
+		break;
+	case 'f':
+		if (!str_is_prefix(&text[index], "false", 5) != 0) {
+			
+		}
+	}
+}
+
+// NOTE: text must live as long as json!!!
+static bool json_parse(JSON *json, const char *text) {
+	memset(json, 0, sizeof *json);
+	json->text = text;
+	// @TODO: is this a good capacity?
+	arr_reserve(json->values, strlen(text) / 8);
+	arr_addp(json->values); // add root
+	JSONValue val = {0};
+	u32 index = 0;
+	if (!json_parse_value(json, &index, &val))
+		return false;
+	
+	while (isspace(text[index])) ++index;
+	if (text[index]) {
+		// more text after end of object
+		// @TODO error message
+		return false;
+	}
+	json->values[0] = val;
+}
+
+static void send_message(LSP *lsp, const char *content) {
+	char header[128];
+	size_t content_size = strlen(content);
+	strbuf_printf(header, "Content-Length: %zu\r\n\r\n", content_size); 
+	process_write(&lsp->process, header, strlen(header));
+	process_write(&lsp->process, content, content_size);
 }
 
 void lsp_create(LSP *lsp, const char *analyzer_command) {
@@ -11,4 +109,15 @@ void lsp_create(LSP *lsp, const char *analyzer_command) {
 		.stdout_blocking = true
 	};
 	process_run_ex(&lsp->process, analyzer_command, &settings);
+	char init_request[1024];
+	strbuf_printf(init_request,
+		"{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"initialize\",\"params\":{"
+			"\"processId\":%d,"
+			"\"capabilities\":{}"
+		"}}",
+		process_get_id());
+	send_message(lsp, init_request);
+	char init_response[4096] = {0};
+	process_read(&lsp->process, init_response, sizeof init_response);
+	printf("%s\n",init_response);
 }