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json.c
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json.c
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#include "json.h"
#include <inttypes.h>
#include <string.h>
void inspector_json_init(inspector_json_t *json, sbuf_t *out) {
json->out = out;
json->depth = 0;
json->wrote_root = false;
}
static bool inspector_json_before_value(inspector_json_t *json) {
if (!json || !json->out) return false;
if (json->depth == 0) {
if (json->wrote_root) return false;
json->wrote_root = true;
return true;
}
inspector_json_frame_t *frame = &json->stack[json->depth - 1];
if (frame->type == INSPECTOR_JSON_ARRAY) {
if (frame->needs_comma && !sbuf_append(json->out, ",")) return false;
frame->needs_comma = true;
return true;
}
if (!frame->expecting_value) return false;
frame->expecting_value = false;
return true;
}
static bool inspector_json_push(inspector_json_t *json, inspector_json_container_t type) {
if (json->depth >= sizeof(json->stack) / sizeof(json->stack[0])) return false;
json->stack[json->depth++] = (inspector_json_frame_t){
.type = type,
.needs_comma = false,
.expecting_value = false,
};
return true;
}
static bool inspector_json_pop(inspector_json_t *json, inspector_json_container_t type) {
if (!json || json->depth == 0) return false;
inspector_json_frame_t *frame = &json->stack[json->depth - 1];
if (frame->type != type || frame->expecting_value) return false;
json->depth--;
return true;
}
bool inspector_json_begin_object(inspector_json_t *json) {
return
inspector_json_before_value(json) &&
sbuf_append(json->out, "{") &&
inspector_json_push(json, INSPECTOR_JSON_OBJECT);
}
bool inspector_json_end_object(inspector_json_t *json) {
return
inspector_json_pop(json, INSPECTOR_JSON_OBJECT) &&
sbuf_append(json->out, "}");
}
bool inspector_json_begin_array(inspector_json_t *json) {
return
inspector_json_before_value(json) &&
sbuf_append(json->out, "[") &&
inspector_json_push(json, INSPECTOR_JSON_ARRAY);
}
bool inspector_json_end_array(inspector_json_t *json) {
return
inspector_json_pop(json, INSPECTOR_JSON_ARRAY) &&
sbuf_append(json->out, "]");
}
bool inspector_json_key(inspector_json_t *json, const char *key) {
if (!json || json->depth == 0) return false;
inspector_json_frame_t *frame = &json->stack[json->depth - 1];
if (frame->type != INSPECTOR_JSON_OBJECT || frame->expecting_value) return false;
if (frame->needs_comma && !sbuf_append(json->out, ",")) return false;
if (!sbuf_json_string(json->out, key ? key : "")) return false;
if (!sbuf_append(json->out, ":")) return false;
frame->needs_comma = true;
frame->expecting_value = true;
return true;
}
bool inspector_json_raw(inspector_json_t *json, const char *raw) {
return inspector_json_before_value(json) && sbuf_append(json->out, raw ? raw : "null");
}
bool inspector_json_string(inspector_json_t *json, const char *value) {
return inspector_json_string_len(json, value ? value : "", value ? strlen(value) : 0);
}
bool inspector_json_string_len(inspector_json_t *json, const char *value, size_t len) {
return inspector_json_before_value(json) &&
sbuf_json_string_len(json->out, value ? value : "", value ? len : 0);
}
bool inspector_json_bool(inspector_json_t *json, bool value) {
return inspector_json_raw(json, value ? "true" : "false");
}
bool inspector_json_int(inspector_json_t *json, int value) {
if (!inspector_json_before_value(json)) return false;
return sbuf_appendf(json->out, "%d", value);
}
bool inspector_json_uint64(inspector_json_t *json, uint64_t value) {
if (!inspector_json_before_value(json)) return false;
return sbuf_appendf(json->out, "%" PRIu64, value);
}
bool inspector_json_size(inspector_json_t *json, size_t value) {
if (!inspector_json_before_value(json)) return false;
return sbuf_appendf(json->out, "%zu", value);
}
bool inspector_json_double(inspector_json_t *json, double value) {
if (!inspector_json_before_value(json)) return false;
return sbuf_appendf(json->out, "%.6f", value);
}
bool inspector_json_null(inspector_json_t *json) {
return inspector_json_raw(json, "null");
}

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