void join(const char* path_a, const char* path_b, DynamicString& path)
{
CE_ENSURE(NULL != path_a);
CE_ENSURE(NULL != path_b);
const u32 la = strlen32(path_a);
const u32 lb = strlen32(path_b);
path.reserve(la + lb + 1);
path += path_a;
path += PATH_SEPARATOR;
path += path_b;
}
void ResourceManager::register_type(StringId64 type, LoadFunction load, UnloadFunction unload, OnlineFunction online, OfflineFunction offline)
{
CE_ENSURE(NULL != load);
CE_ENSURE(NULL != unload);
ResourceTypeData data;
data.load = load;
data.online = online;
data.offline = offline;
data.unload = unload;
sort_map::set(_type_data, type, data);
sort_map::sort(_type_data);
}
void parse_array(const char* json, JsonArray& array)
{
CE_ENSURE(NULL != json);
if (*json == '[')
{
json = skip_spaces(++json);
if (*json == ']')
return;
while (*json)
{
array::push_back(array, json);
json = skip_value(json);
json = skip_spaces(json);
if (*json == ']')
return;
json = skip_spaces(json);
}
}
CE_FATAL("Bad array");
}
static const char* skip_comments(const char* json)
{
CE_ENSURE(NULL != json);
if (*json == '/')
{
++json;
if (*json == '/')
{
json = next(json, '/');
while (*json && *json != '\n')
++json;
}
else if (*json == '*')
{
++json;
while (*json && *json != '*')
++json;
json = next(json, '*');
json = next(json, '/');
}
else
CE_FATAL("Bad comment");
}
return json;
}
bool parse_bool(const char* json)
{
CE_ENSURE(NULL != json);
switch (*json)
{
case 't':
json = next(json, 't');
json = next(json, 'r');
json = next(json, 'u');
json = next(json, 'e');
return true;
case 'f':
json = next(json, 'f');
json = next(json, 'a');
json = next(json, 'l');
json = next(json, 's');
json = next(json, 'e');
return false;
default:
CE_FATAL("Bad boolean");
return false;
}
}
bool is_root(const char* path)
{
CE_ENSURE(NULL != path);
#if CROWN_PLATFORM_POSIX
return is_absolute(path) && strlen32(path) == 1;
#elif CROWN_PLATFORM_WINDOWS
return is_absolute(path) && strlen32(path) == 3;
#endif
}
void parse(const char* json, JsonObject& object)
{
CE_ENSURE(NULL != json);
json = skip_spaces(json);
if (*json == '{')
parse_object(json, object);
else
parse_root_object(json, object);
}
static const char* next(const char* json, const char c = 0)
{
CE_ENSURE(NULL != json);
if (c && c != *json)
{
CE_ASSERT(false, "Expected '%c' got '%c'", c, *json);
}
return ++json;
}
static f64 parse_number(const char* json)
{
CE_ENSURE(NULL != json);
TempAllocator512 alloc;
Array<char> number(alloc);
if (*json == '-')
{
array::push_back(number, '-');
++json;
}
while (isdigit(*json))
{
array::push_back(number, *json);
++json;
}
if (*json == '.')
{
array::push_back(number, '.');
while (*++json && isdigit(*json))
{
array::push_back(number, *json);
}
}
if (*json == 'e' || *json == 'E')
{
array::push_back(number, *json);
++json;
if (*json == '-' || *json == '+')
{
array::push_back(number, *json);
++json;
}
while (isdigit(*json))
{
array::push_back(number, *json);
++json;
}
}
array::push_back(number, '\0');
f64 val;
int ok = sscanf(array::begin(number), "%lf", &val);
CE_ASSERT(ok == 1, "Failed to parse f64: %s", array::begin(number));
CE_UNUSED(ok);
return val;
}
JsonValueType::Enum type(const char* json)
{
CE_ENSURE(NULL != json);
switch (*json)
{
case '"': return JsonValueType::STRING;
case '{': return JsonValueType::OBJECT;
case '[': return JsonValueType::ARRAY;
case '-': return JsonValueType::NUMBER;
default: return (isdigit(*json)) ? JsonValueType::NUMBER : (*json == 'n' ? JsonValueType::NIL : JsonValueType::BOOL);
}
}
static const char* skip_spaces(const char* json)
{
CE_ENSURE(NULL != json);
while (*json)
{
if (*json == '/') json = skip_comments(json);
else if (isspace(*json) || *json == ',') ++json;
else break;
}
return json;
}
static const char* skip_value(const char* json)
{
CE_ENSURE(NULL != json);
switch (*json)
{
case '"': json = skip_string(json); break;
case '[': json = skip_block(json, '[', ']'); break;
case '{': json = skip_block(json, '{', '}'); break;
default: for (; *json != '\0' && *json != ',' && *json != '\n' && *json != ' ' && *json != '}' && *json != ']'; ++json) ; break;
}
return json;
}
bool is_absolute(const char* path)
{
CE_ENSURE(NULL != path);
#if CROWN_PLATFORM_POSIX
return strlen32(path) > 0
&& path[0] == PATH_SEPARATOR
;
#elif CROWN_PLATFORM_WINDOWS
return strlen32(path) > 2
&& isalpha(path[0])
&& path[1] == ':'
&& path[2] == PATH_SEPARATOR
;
#endif
}
static const char* skip_string(const char* json)
{
CE_ENSURE(NULL != json);
while (*++json)
{
if (*json == '"')
{
++json;
return json;
}
else if (*json == '\\')
{
++json;
}
}
return json;
}
static const char* parse_key(const char* json, DynamicString& key)
{
CE_ENSURE(NULL != json);
if (*json == '"')
{
parse_string(json, key);
return skip_string(json);
}
while (true)
{
if (isspace(*json) || *json == '=' || *json == ':')
return json;
key += *json++;
}
CE_FATAL("Bad key");
return NULL;
}
void parse_string(const char* json, DynamicString& string)
{
CE_ENSURE(NULL != json);
if (*json == '"')
{
while (*++json)
{
// Empty string
if (*json == '"')
{
++json;
return;
}
else if (*json == '\\')
{
++json;
switch (*json)
{
case '"': string += '"'; break;
case '\\': string += '\\'; break;
case '/': string += '/'; break;
case 'b': string += '\b'; break;
case 'f': string += '\f'; break;
case 'n': string += '\n'; break;
case 'r': string += '\r'; break;
case 't': string += '\t'; break;
default: CE_FATAL("Bad escape character"); break;
}
}
else
{
string += *json;
}
}
}
CE_FATAL("Bad string");
}
void parse_object(const char* json, JsonObject& object)
{
CE_ENSURE(NULL != json);
if (*json == '{')
{
json = skip_spaces(++json);
if (*json == '}')
return;
while (*json)
{
const char* key_begin = *json == '"' ? (json + 1) : json;
TempAllocator256 ta;
DynamicString key(ta);
json = parse_key(json, key);
FixedString fs_key(key_begin, key.length());
json = skip_spaces(json);
json = next(json, (*json == '=') ? '=' : ':');
json = skip_spaces(json);
map::set(object._map, fs_key, json);
json = skip_value(json);
json = skip_spaces(json);
if (*json == '}')
return;
json = skip_spaces(json);
}
}
CE_FATAL("Bad object");
}
const char* basename(const char* path)
{
CE_ENSURE(NULL != path);
const char* ls = strrchr(path, '/');
return ls == NULL ? path : ls + 1;
}
const char* extension(const char* path)
{
CE_ENSURE(NULL != path);
const char* ld = strrchr(path, '.');
return ld == NULL ? NULL : ld + 1;
}
bool is_relative(const char* path)
{
CE_ENSURE(NULL != path);
return !is_absolute(path);
}