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Diffstat (limited to 'lsp.c')
-rw-r--r--lsp.c219
1 files changed, 202 insertions, 17 deletions
diff --git a/lsp.c b/lsp.c
index c35b691..e487db9 100644
--- a/lsp.c
+++ b/lsp.c
@@ -11,13 +11,17 @@ typedef struct JSONValue JSONValue;
typedef struct {
u32 len;
- u32 properties;
- u32 values;
+ // this is an index into the values array
+ // values[items..items+len] store the names
+ // values[items+len..items+2*len] store the values
+ u32 items;
} JSONObject;
typedef struct {
u32 len;
- u32 values;
+ // this is an index into the values array
+ // values[elements..elements+len] are the elements
+ u32 elements;
} JSONArray;
enum {
@@ -42,11 +46,122 @@ struct JSONValue {
typedef struct {
+ char error[64];
const char *text;
// root = values[0]
JSONValue *values;
} JSON;
+static bool json_parse_value(JSON *json, u32 *p_index, JSONValue *val);
+
+// count number of comma-separated values until
+// closing ] or }
+static u32 json_count(JSON *json, u32 index) {
+ int bracket_depth = 0;
+ int brace_depth = 0;
+ u32 count = 0;
+ const char *text = json->text;
+ for (; ; ++index) {
+ switch (text[index]) {
+ case '\0': return 0; // bad no closing bracket
+ case '[':
+ ++bracket_depth;
+ break;
+ case '{':
+ ++brace_depth;
+ break;
+ case '}':
+ --brace_depth;
+ if (brace_depth < 0)
+ return count;
+ break;
+ case ']':
+ --bracket_depth;
+ if (bracket_depth < 0)
+ return count;
+ break;
+ case ',':
+ if (bracket_depth == 0 && brace_depth == 0)
+ ++count;
+ break;
+ case '"': {
+ int escaped = 0;
+ for (; ; ++index) {
+ switch (text[index]) {
+ case '\0': return 0; // bad no closing quote
+ case '\\': escaped = !escaped; break;
+ case '"':
+ if (!escaped)
+ goto done;
+ escaped = false;
+ break;
+ default:
+ escaped = false;
+ break;
+ }
+ }
+ done:;
+ } break;
+ }
+ }
+}
+
+static bool json_parse_object(JSON *json, u32 *p_index, JSONObject *object) {
+ u32 index = *p_index;
+ const char *text = json->text;
+ ++index; // go past {
+ u32 count = json_count(json, index);
+ object->len = count;
+ object->items = arr_len(json->values);
+ arr_set_len(json->values, arr_len(json->values) + 2 * count);
+
+ for (u32 i = 0; i < count; ++i) {
+ if (i > 0) {
+ if (text[index] != ',') {
+ strbuf_printf(json->error, "stuff after value in object");
+ return false;
+ }
+ ++index;
+ }
+ JSONValue name = {0}, value = {0};
+ if (!json_parse_value(json, &index, &name))
+ return false;
+ while (isspace(text[index])) ++index;
+ if (text[index] != ':') {
+ strbuf_printf(json->error, "stuff after name in object");
+ return false;
+ }
+ while (isspace(text[index])) ++index;
+ if (!json_parse_value(json, &index, &value))
+ return false;
+ while (isspace(text[index])) ++index;
+ json->values[object->items + i] = name;
+ json->values[object->items + count + i] = value;
+ }
+
+ if (text[index] != '}') {
+ strbuf_printf(json->error, "mismatched brackets or quotes.");
+ return false;
+ }
+ *p_index = index;
+ return true;
+}
+
+static bool json_parse_array(JSON *json, u32 *p_index, JSONArray *array) {
+ (void)json;(void)p_index;(void)array;
+ abort();
+}
+
+static bool json_parse_string(JSON *json, u32 *p_index, JSONString *string) {
+ (void)json;(void)p_index;(void)string;
+ abort();
+}
+
+static bool json_parse_number(JSON *json, u32 *p_index, double *number) {
+ (void)json;(void)p_index;(void)number;
+ abort();
+}
+
static bool json_parse_value(JSON *json, u32 *p_index, JSONValue *val) {
const char *text = json->text;
u32 index = *p_index;
@@ -54,24 +169,47 @@ static bool json_parse_value(JSON *json, u32 *p_index, JSONValue *val) {
switch (text[index]) {
case '{':
val->type = JSON_OBJECT;
- json_parse_object(json, &index, &val->val.object);
+ if (!json_parse_object(json, &index, &val->val.object))
+ return false;
break;
case '[':
val->type = JSON_ARRAY;
- json_parse_array(json, &index, &val->val.array);
+ if (!json_parse_array(json, &index, &val->val.array))
+ return false;
break;
case '"':
val->type = JSON_STRING;
- json_parse_string(json, &index, &val->val.string);
+ if (!json_parse_string(json, &index, &val->val.string))
+ return false;
break;
case ANY_DIGIT:
- json_parse_number(json, &index, &val->val.number);
+ val->type = JSON_NUMBER;
+ if (!json_parse_number(json, &index, &val->val.number))
+ return false;
break;
case 'f':
- if (!str_is_prefix(&text[index], "false", 5) != 0) {
-
- }
+ val->type = JSON_FALSE;
+ if (!str_has_prefix(&text[index], "false"))
+ return false;
+ index += 5;
+ break;
+ case 't':
+ val->type = JSON_TRUE;
+ if (!str_has_prefix(&text[index], "true"))
+ return false;
+ index += 4;
+ break;
+ case 'n':
+ val->type = JSON_NULL;
+ if (!str_has_prefix(&text[index], "null"))
+ return false;
+ index += 4;
+ break;
+ default:
+ strbuf_printf(json->error, "bad value");
}
+ *p_index = index;
+ return true;
}
// NOTE: text must live as long as json!!!
@@ -88,14 +226,55 @@ static bool json_parse(JSON *json, const char *text) {
while (isspace(text[index])) ++index;
if (text[index]) {
- // more text after end of object
- // @TODO error message
+ strbuf_printf(json->error, "extra text after end of object");
return false;
}
json->values[0] = val;
+ return true;
+}
+
+
+static void json_debug_print_value(const JSON *json, u32 idx) {
+ JSONValue *value = &json->values[idx];
+ switch (value->type) {
+ case JSON_NULL: printf("null"); break;
+ case JSON_FALSE: printf("false"); break;
+ case JSON_TRUE: printf("true"); break;
+ case JSON_NUMBER: printf("%f", value->val.number); break;
+ case JSON_STRING: {
+ JSONString *string = &value->val.string;
+ printf("\"%.*s\"",
+ (int)string->len,
+ json->text + string->pos);
+ } break;
+ case JSON_ARRAY: {
+ JSONArray *array = &value->val.array;
+ printf("[");
+ for (u32 i = 0; i < array->len; ++i) {
+ json_debug_print_value(json, array->elements + i);
+ printf(",");
+ }
+ printf("]");
+ } break;
+ case JSON_OBJECT: {
+ JSONObject *obj = &value->val.object;
+ printf("{");
+ for (u32 i = 0; i < obj->len; ++i) {
+ json_debug_print_value(json, obj->items + i);
+ printf(": ");
+ json_debug_print_value(json, obj->items + obj->len + i);
+ printf(",");
+ }
+ printf("}");
+ } break;
+ }
}
-static void send_message(LSP *lsp, const char *content) {
+static void json_debug_print(const JSON *json) {
+ json_debug_print_value(json, 0);
+}
+
+static void send_request(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);
@@ -116,8 +295,14 @@ void lsp_create(LSP *lsp, const char *analyzer_command) {
"\"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);
+ send_request(lsp, init_request);
+ // @TODO: recv_response
+ char response_text[4096] = {0};
+ process_read(&lsp->process, response_text, sizeof response_text);
+
+ JSON json = {0};
+ if (!json_parse(&json, strstr(response_text, "\r\n\r\n") + 4))
+ printf("fail : %s\n",json.error);
+ json_debug_print(&json);
+
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 09:09:00 +0000