CWIST API Reference

Error Handling

make_error

• cwist_error_t make_error(cwist_errtype_t type)
• Creates a cwist_error_t with the requested error type.

cwist_error_is_ok / cwist_error_is_ok_extern

• static inline bool cwist_error_is_ok(const cwist_error_t *err)
• bool cwist_error_is_ok_extern(const cwist_error_t *err)
• True when the active channel holds its zero/empty value (NULL counts as success). The _extern form is the same check as a real symbol, for callers that cannot use a static inline function, such as bindings generated from the headers.

Other exported inline helpers

• bool cwist_endpoint_has_extern(cwist_endpoint_opt_t opts, cwist_endpoint_opt_t flag) is the out-of-line cwist_endpoint_has().
• Every static inline helper in include/cwist/ is either exported this way or listed with a reason in scripts/ci/check_inline_exports.py, which CI runs.

SString (cwist_sstring)

Lifecycle

• cwist_sstring *cwist_sstring_create(void)
• void cwist_sstring_destroy(cwist_sstring *str)
• cwist_error_t cwist_sstring_init(cwist_sstring *str)

Core helpers

• size_t cwist_sstring_get_size(cwist_sstring *str)
• cwist_error_t cwist_sstring_change_size(cwist_sstring *str, size_t size, bool blow_data)
• cwist_error_t cwist_sstring_assign(cwist_sstring *str, char *data)

Trimming

• cwist_error_t cwist_sstring_ltrim(cwist_sstring *str)
• cwist_error_t cwist_sstring_rtrim(cwist_sstring *str)
• cwist_error_t cwist_sstring_trim(cwist_sstring *str)

Append / Copy

• cwist_error_t cwist_sstring_append(cwist_sstring *str, const char *data)
• cwist_error_t cwist_sstring_append_sstring(cwist_sstring *str, const cwist_sstring *from)
• cwist_error_t cwist_sstring_copy(cwist_sstring *origin, char *destination)
• cwist_error_t cwist_sstring_copy_sstring(cwist_sstring *origin, const cwist_sstring *from)

Compare / Query

• int cwist_sstring_compare(cwist_sstring *str, const char *compare_to)
• int cwist_sstring_compare_sstring(cwist_sstring *left, const cwist_sstring *right)
• cwist_error_t cwist_sstring_seek(cwist_sstring *str, char *substr, int location)
• cwist_sstring *cwist_sstring_substr(cwist_sstring *str, int start, int length)

HTTP

Request lifecycle

• cwist_http_request *cwist_http_request_create(void)
• void cwist_http_request_destroy(cwist_http_request *req)
• cwist_http_request *cwist_http_parse_request(const char *raw_request)

Response lifecycle

• cwist_http_response *cwist_http_response_create(void)
• void cwist_http_response_destroy(cwist_http_response *res)
• cwist_error_t cwist_http_send_response(int client_fd, cwist_http_response *res)

Header helpers

• cwist_error_t cwist_http_header_add(cwist_http_header_node **head, const char *key, const char *value)
• char *cwist_http_header_get(cwist_http_header_node *head, const char *key)
• void cwist_http_header_free_all(cwist_http_header_node *head)

Method helpers

• const char *cwist_http_method_to_string(cwist_http_method_t method)
• cwist_http_method_t cwist_http_string_to_method(const char *method_str)

Socket helpers

• int cwist_make_socket_ipv4(struct sockaddr_in *sockv4, const char *address, uint16_t port, uint16_t backlog)
• cwist_error_t cwist_accept_socket(int server_fd, struct sockaddr *sockv4, void (*handler_func)(int client_fd))
• cwist_error_t cwist_http_server_loop(int server_fd, cwist_server_config *config, void (*handler)(int))

Session manager

Arena

• void session_arena_init(struct session_arena *arena, uint8_t *buffer, size_t capacity)
• void *session_arena_alloc(struct session_arena *arena, size_t size)
• void session_arena_reset(struct session_arena *arena)

Shared sessions (intrusive ref count)

• void session_rc_init(struct session_rc_header *header, void (*destructor)(void *))
• void *session_shared_alloc(size_t payload_size, void (*destructor)(void *))
• void session_shared_inc(void *payload)
• void session_shared_dec(void *payload)

Manager

• void session_manager_init(struct session_manager *manager, uint8_t *buffer, size_t capacity)
• void session_manager_reset(struct session_manager *manager)