1 /* 2 +----------------------------------------------------------------------+ 3 | Copyright (c) The PHP Group | 4 +----------------------------------------------------------------------+ 5 | This source file is subject to version 3.01 of the PHP license, | 6 | that is bundled with this package in the file LICENSE, and is | 7 | available through the world-wide-web at the following url: | 8 | https://www.php.net/license/3_01.txt | 9 | If you did not receive a copy of the PHP license and are unable to | 10 | obtain it through the world-wide-web, please send a note to | 11 | license@php.net so we can mail you a copy immediately. | 12 +----------------------------------------------------------------------+ 13 | Author: Michael Wallner <mike@php.net> | 14 +----------------------------------------------------------------------+ 15 */ 16 17 #ifndef PHP_OUTPUT_H 18 #define PHP_OUTPUT_H 19 20 #define PHP_OUTPUT_NEWAPI 1 21 22 /* handler ops */ 23 #define PHP_OUTPUT_HANDLER_WRITE 0x00 /* standard passthru */ 24 #define PHP_OUTPUT_HANDLER_START 0x01 /* start */ 25 #define PHP_OUTPUT_HANDLER_CLEAN 0x02 /* restart */ 26 #define PHP_OUTPUT_HANDLER_FLUSH 0x04 /* pass along as much as possible */ 27 #define PHP_OUTPUT_HANDLER_FINAL 0x08 /* finalize */ 28 #define PHP_OUTPUT_HANDLER_CONT PHP_OUTPUT_HANDLER_WRITE 29 #define PHP_OUTPUT_HANDLER_END PHP_OUTPUT_HANDLER_FINAL 30 31 /* handler types */ 32 #define PHP_OUTPUT_HANDLER_INTERNAL 0x0000 33 #define PHP_OUTPUT_HANDLER_USER 0x0001 34 35 /* handler ability flags */ 36 #define PHP_OUTPUT_HANDLER_CLEANABLE 0x0010 37 #define PHP_OUTPUT_HANDLER_FLUSHABLE 0x0020 38 #define PHP_OUTPUT_HANDLER_REMOVABLE 0x0040 39 #define PHP_OUTPUT_HANDLER_STDFLAGS 0x0070 40 41 /* handler status flags */ 42 #define PHP_OUTPUT_HANDLER_STARTED 0x1000 43 #define PHP_OUTPUT_HANDLER_DISABLED 0x2000 44 #define PHP_OUTPUT_HANDLER_PROCESSED 0x4000 45 46 /* handler op return values */ 47 typedef enum _php_output_handler_status_t { 48 PHP_OUTPUT_HANDLER_FAILURE, 49 PHP_OUTPUT_HANDLER_SUCCESS, 50 PHP_OUTPUT_HANDLER_NO_DATA 51 } php_output_handler_status_t; 52 53 /* php_output_stack_pop() flags */ 54 #define PHP_OUTPUT_POP_TRY 0x000 55 #define PHP_OUTPUT_POP_FORCE 0x001 56 #define PHP_OUTPUT_POP_DISCARD 0x010 57 #define PHP_OUTPUT_POP_SILENT 0x100 58 59 /* real global flags */ 60 #define PHP_OUTPUT_IMPLICITFLUSH 0x01 61 #define PHP_OUTPUT_DISABLED 0x02 62 #define PHP_OUTPUT_WRITTEN 0x04 63 #define PHP_OUTPUT_SENT 0x08 64 /* supplementary flags for php_output_get_status() */ 65 #define PHP_OUTPUT_ACTIVE 0x10 66 #define PHP_OUTPUT_LOCKED 0x20 67 /* output layer is ready to use */ 68 #define PHP_OUTPUT_ACTIVATED 0x100000 69 70 /* handler hooks */ 71 typedef enum _php_output_handler_hook_t { 72 PHP_OUTPUT_HANDLER_HOOK_GET_OPAQ, 73 PHP_OUTPUT_HANDLER_HOOK_GET_FLAGS, 74 PHP_OUTPUT_HANDLER_HOOK_GET_LEVEL, 75 PHP_OUTPUT_HANDLER_HOOK_IMMUTABLE, 76 PHP_OUTPUT_HANDLER_HOOK_DISABLE, 77 /* unused */ 78 PHP_OUTPUT_HANDLER_HOOK_LAST 79 } php_output_handler_hook_t; 80 81 #define PHP_OUTPUT_HANDLER_INITBUF_SIZE(s) \ 82 ( ((s) > 1) ? \ 83 (s) + PHP_OUTPUT_HANDLER_ALIGNTO_SIZE - ((s) % (PHP_OUTPUT_HANDLER_ALIGNTO_SIZE)) : \ 84 PHP_OUTPUT_HANDLER_DEFAULT_SIZE \ 85 ) 86 #define PHP_OUTPUT_HANDLER_ALIGNTO_SIZE 0x1000 87 #define PHP_OUTPUT_HANDLER_DEFAULT_SIZE 0x4000 88 89 typedef struct _php_output_buffer { 90 char *data; 91 size_t size; 92 size_t used; 93 uint32_t free:1; 94 uint32_t _reserved:31; 95 } php_output_buffer; 96 97 typedef struct _php_output_context { 98 int op; 99 php_output_buffer in; 100 php_output_buffer out; 101 } php_output_context; 102 103 /* old-style, stateless callback */ 104 typedef void (*php_output_handler_func_t)(char *output, size_t output_len, char **handled_output, size_t *handled_output_len, int mode); 105 /* new-style, opaque context callback */ 106 typedef int (*php_output_handler_context_func_t)(void **handler_context, php_output_context *output_context); 107 /* output handler context dtor */ 108 typedef void (*php_output_handler_context_dtor_t)(void *opaq); 109 /* conflict check callback */ 110 typedef int (*php_output_handler_conflict_check_t)(const char *handler_name, size_t handler_name_len); 111 /* ctor for aliases */ 112 typedef struct _php_output_handler *(*php_output_handler_alias_ctor_t)(const char *handler_name, size_t handler_name_len, size_t chunk_size, int flags); 113 114 typedef struct _php_output_handler_user_func_t { 115 zend_fcall_info fci; 116 zend_fcall_info_cache fcc; 117 zval zoh; 118 } php_output_handler_user_func_t; 119 120 typedef struct _php_output_handler { 121 zend_string *name; 122 int flags; 123 int level; 124 size_t size; 125 php_output_buffer buffer; 126 127 void *opaq; 128 void (*dtor)(void *opaq); 129 130 union { 131 php_output_handler_user_func_t *user; 132 php_output_handler_context_func_t internal; 133 } func; 134 } php_output_handler; 135 136 ZEND_BEGIN_MODULE_GLOBALS(output) 137 zend_stack handlers; 138 php_output_handler *active; 139 php_output_handler *running; 140 zend_string *output_start_filename; 141 int output_start_lineno; 142 int flags; 143 ZEND_END_MODULE_GLOBALS(output) 144 145 PHPAPI ZEND_EXTERN_MODULE_GLOBALS(output) 146 147 /* there should not be a need to use OG() from outside of output.c */ 148 #ifdef ZTS 149 # define OG(v) ZEND_TSRMG(output_globals_id, zend_output_globals *, v) 150 #else 151 # define OG(v) (output_globals.v) 152 #endif 153 154 /* convenience macros */ 155 #define PHPWRITE(str, str_len) php_output_write((str), (str_len)) 156 #define PHPWRITE_H(str, str_len) php_output_write_unbuffered((str), (str_len)) 157 158 #define PUTC(c) php_output_write((const char *) &(c), 1) 159 #define PUTC_H(c) php_output_write_unbuffered((const char *) &(c), 1) 160 161 #define PUTS(str) do { \ 162 const char *__str = (str); \ 163 php_output_write(__str, strlen(__str)); \ 164 } while (0) 165 #define PUTS_H(str) do { \ 166 const char *__str = (str); \ 167 php_output_write_unbuffered(__str, strlen(__str)); \ 168 } while (0) 169 170 171 BEGIN_EXTERN_C() 172 173 extern const char php_output_default_handler_name[sizeof("default output handler")]; 174 extern const char php_output_devnull_handler_name[sizeof("null output handler")]; 175 176 #define php_output_tearup() \ 177 php_output_startup(); \ 178 php_output_activate() 179 #define php_output_teardown() \ 180 php_output_end_all(); \ 181 php_output_deactivate(); \ 182 php_output_shutdown() 183 184 /* MINIT */ 185 PHPAPI void php_output_startup(void); 186 /* MSHUTDOWN */ 187 PHPAPI void php_output_shutdown(void); 188 189 PHPAPI void php_output_register_constants(void); 190 191 /* RINIT */ 192 PHPAPI int php_output_activate(void); 193 /* RSHUTDOWN */ 194 PHPAPI void php_output_deactivate(void); 195 196 PHPAPI void php_output_set_status(int status); 197 PHPAPI int php_output_get_status(void); 198 PHPAPI void php_output_set_implicit_flush(int flush); 199 PHPAPI const char *php_output_get_start_filename(void); 200 PHPAPI int php_output_get_start_lineno(void); 201 202 PHPAPI size_t php_output_write_unbuffered(const char *str, size_t len); 203 PHPAPI size_t php_output_write(const char *str, size_t len); 204 205 PHPAPI int php_output_flush(void); 206 PHPAPI void php_output_flush_all(void); 207 PHPAPI int php_output_clean(void); 208 PHPAPI void php_output_clean_all(void); 209 PHPAPI int php_output_end(void); 210 PHPAPI void php_output_end_all(void); 211 PHPAPI int php_output_discard(void); 212 PHPAPI void php_output_discard_all(void); 213 214 PHPAPI int php_output_get_contents(zval *p); 215 PHPAPI int php_output_get_length(zval *p); 216 PHPAPI int php_output_get_level(void); 217 PHPAPI php_output_handler* php_output_get_active_handler(void); 218 219 PHPAPI int php_output_start_default(void); 220 PHPAPI int php_output_start_devnull(void); 221 222 PHPAPI int php_output_start_user(zval *output_handler, size_t chunk_size, int flags); 223 PHPAPI int php_output_start_internal(const char *name, size_t name_len, php_output_handler_func_t output_handler, size_t chunk_size, int flags); 224 225 PHPAPI php_output_handler *php_output_handler_create_user(zval *handler, size_t chunk_size, int flags); 226 PHPAPI php_output_handler *php_output_handler_create_internal(const char *name, size_t name_len, php_output_handler_context_func_t handler, size_t chunk_size, int flags); 227 228 PHPAPI void php_output_handler_set_context(php_output_handler *handler, void *opaq, void (*dtor)(void*)); 229 PHPAPI int php_output_handler_start(php_output_handler *handler); 230 PHPAPI int php_output_handler_started(const char *name, size_t name_len); 231 PHPAPI int php_output_handler_hook(php_output_handler_hook_t type, void *arg); 232 PHPAPI void php_output_handler_dtor(php_output_handler *handler); 233 PHPAPI void php_output_handler_free(php_output_handler **handler); 234 235 PHPAPI int php_output_handler_conflict(const char *handler_new, size_t handler_new_len, const char *handler_set, size_t handler_set_len); 236 PHPAPI int php_output_handler_conflict_register(const char *handler_name, size_t handler_name_len, php_output_handler_conflict_check_t check_func); 237 PHPAPI int php_output_handler_reverse_conflict_register(const char *handler_name, size_t handler_name_len, php_output_handler_conflict_check_t check_func); 238 239 PHPAPI php_output_handler_alias_ctor_t php_output_handler_alias(const char *handler_name, size_t handler_name_len); 240 PHPAPI int php_output_handler_alias_register(const char *handler_name, size_t handler_name_len, php_output_handler_alias_ctor_t func); 241 242 END_EXTERN_C() 243 244 245 PHP_FUNCTION(ob_start); 246 PHP_FUNCTION(ob_flush); 247 PHP_FUNCTION(ob_clean); 248 PHP_FUNCTION(ob_end_flush); 249 PHP_FUNCTION(ob_end_clean); 250 PHP_FUNCTION(ob_get_flush); 251 PHP_FUNCTION(ob_get_clean); 252 PHP_FUNCTION(ob_get_contents); 253 PHP_FUNCTION(ob_get_length); 254 PHP_FUNCTION(ob_get_level); 255 PHP_FUNCTION(ob_get_status); 256 PHP_FUNCTION(ob_implicit_flush); 257 PHP_FUNCTION(ob_list_handlers); 258 259 PHP_FUNCTION(output_add_rewrite_var); 260 PHP_FUNCTION(output_reset_rewrite_vars); 261 262 #endif 263
