2 +--------------------------------------------------------------------+
4 +--------------------------------------------------------------------+
5 | Redistribution and use in source and binary forms, with or without |
6 | modification, are permitted provided that the conditions mentioned |
7 | in the accompanying LICENSE file are met. |
8 +--------------------------------------------------------------------+
9 | Copyright (c) 2004-2011, Michael Wallner <mike@php.net> |
10 +--------------------------------------------------------------------+
14 #include "php_http_buffer.h"
16 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_init_ex(php_http_buffer_t
*buf
, size_t chunk_size
, int flags
)
19 buf
= pemalloc(sizeof(*buf
), flags
& PHP_HTTP_BUFFER_INIT_PERSISTENT
);
23 buf
->size
= (chunk_size
) ? chunk_size
: PHP_HTTP_BUFFER_DEFAULT_SIZE
;
24 buf
->pmem
= (flags
& PHP_HTTP_BUFFER_INIT_PERSISTENT
) ? 1 : 0;
25 buf
->data
= (flags
& PHP_HTTP_BUFFER_INIT_PREALLOC
) ? pemalloc(buf
->size
, buf
->pmem
) : NULL
;
26 buf
->free
= (flags
& PHP_HTTP_BUFFER_INIT_PREALLOC
) ? buf
->size
: 0;
33 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_from_string_ex(php_http_buffer_t
*buf
, const char *string
, size_t length
)
35 if ((buf
= php_http_buffer_init(buf
))) {
36 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_append(buf
, string
, length
)) {
37 pefree(buf
, buf
->pmem
);
44 PHP_HTTP_BUFFER_API
size_t php_http_buffer_resize_ex(php_http_buffer_t
*buf
, size_t len
, size_t override_size
, int allow_error
)
48 fprintf(stderr
, "RESIZE: len=%lu, size=%lu, used=%lu, free=%lu\n", len
, buf
->size
, buf
->used
, buf
->free
);
50 if (buf
->free
< len
) {
51 size_t size
= override_size
? override_size
: buf
->size
;
53 while ((size
+ buf
->free
) < len
) {
58 ptr
= perealloc_recoverable(buf
->data
, buf
->used
+ buf
->free
+ size
, buf
->pmem
);
60 ptr
= perealloc(buf
->data
, buf
->used
+ buf
->free
+ size
, buf
->pmem
);
66 return PHP_HTTP_BUFFER_NOMEM
;
75 PHP_HTTP_BUFFER_API
char *php_http_buffer_account(php_http_buffer_t
*buf
, size_t to_account
)
77 /* it's probably already too late but check anyway */
78 if (to_account
> buf
->free
) {
82 buf
->free
-= to_account
;
83 buf
->used
+= to_account
;
85 return buf
->data
+ buf
->used
;
88 PHP_HTTP_BUFFER_API
size_t php_http_buffer_shrink(php_http_buffer_t
*buf
)
90 /* avoid another realloc on fixation */
92 char *ptr
= perealloc(buf
->data
, buf
->used
+ 1, buf
->pmem
);
97 return PHP_HTTP_BUFFER_NOMEM
;
104 PHP_HTTP_BUFFER_API
size_t php_http_buffer_append(php_http_buffer_t
*buf
, const char *append
, size_t append_len
)
106 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize(buf
, append_len
)) {
107 return PHP_HTTP_BUFFER_NOMEM
;
109 memcpy(buf
->data
+ buf
->used
, append
, append_len
);
110 buf
->used
+= append_len
;
111 buf
->free
-= append_len
;
115 PHP_HTTP_BUFFER_API
size_t php_http_buffer_appendf(php_http_buffer_t
*buf
, const char *format
, ...)
119 size_t append_len
, alloc
;
121 va_start(argv
, format
);
122 append_len
= vspprintf(&append
, 0, format
, argv
);
125 alloc
= php_http_buffer_append(buf
, append
, append_len
);
128 if (PHP_HTTP_BUFFER_NOMEM
== alloc
) {
129 return PHP_HTTP_BUFFER_NOMEM
;
134 PHP_HTTP_BUFFER_API
char *php_http_buffer_data(const php_http_buffer_t
*buf
, char **into
, size_t *len
)
136 char *copy
= ecalloc(1, buf
->used
+ 1);
137 memcpy(copy
, buf
->data
, buf
->used
);
147 PHP_HTTP_BUFFER_API
size_t php_http_buffer_cut(php_http_buffer_t
*buf
, size_t offset
, size_t length
)
149 if (offset
> buf
->used
) {
152 if (offset
+ length
> buf
->used
) {
153 length
= buf
->used
- offset
;
155 memmove(buf
->data
+ offset
, buf
->data
+ offset
+ length
, buf
->used
- length
- offset
);
161 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_fix(php_http_buffer_t
*buf
)
163 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize_ex(buf
, 1, 1, 0)) {
166 buf
->data
[buf
->used
] = '\0';
170 PHP_HTTP_BUFFER_API
void php_http_buffer_reset(php_http_buffer_t
*buf
)
172 buf
->free
+= buf
->used
;
176 PHP_HTTP_BUFFER_API
void php_http_buffer_dtor(php_http_buffer_t
*buf
)
179 pefree(buf
->data
, buf
->pmem
);
186 PHP_HTTP_BUFFER_API
void php_http_buffer_free(php_http_buffer_t
**buf
)
189 php_http_buffer_dtor(*buf
);
190 pefree(*buf
, (*buf
)->pmem
);
195 PHP_HTTP_BUFFER_API
size_t php_http_buffer_chunk_buffer(php_http_buffer_t
**s
, const char *data
, size_t data_len
, char **chunk
, size_t chunk_size
)
197 php_http_buffer_t
*storage
;
202 *s
= php_http_buffer_init_ex(NULL
, chunk_size
<< 1, chunk_size
? PHP_HTTP_BUFFER_INIT_PREALLOC
: 0);
207 php_http_buffer_append(storage
, data
, data_len
);
211 php_http_buffer_data(storage
, chunk
, &chunk_size
);
212 php_http_buffer_free(s
);
216 if (storage
->used
>= chunk_size
) {
217 *chunk
= estrndup(storage
->data
, chunk_size
);
218 php_http_buffer_cut(storage
, 0, chunk_size
);
225 PHP_HTTP_BUFFER_API
void php_http_buffer_chunked_output(php_http_buffer_t
**s
, const char *data
, size_t data_len
, size_t chunk_len
, php_http_buffer_pass_func_t passout
, void *opaque TSRMLS_DC
)
230 while ((got
= php_http_buffer_chunk_buffer(s
, data
, data_len
, &chunk
, chunk_len
))) {
231 passout(opaque
, chunk
, got TSRMLS_CC
);
233 /* we already got the last chunk,
234 and freed all resources */
239 STR_SET(chunk
, NULL
);
244 PHP_HTTP_BUFFER_API ssize_t
php_http_buffer_passthru(php_http_buffer_t
**s
, size_t chunk_size
, php_http_buffer_pass_func_t passin
, void *passin_arg
, php_http_buffer_pass_func_t passon
, void *passon_arg TSRMLS_DC
)
246 size_t passed_on
= 0, passed_in
= php_http_buffer_chunked_input(s
, chunk_size
, passin
, passin_arg TSRMLS_CC
);
248 if (passed_in
== PHP_HTTP_BUFFER_PASS0
) {
251 if (passed_in
|| (*s
)->used
) {
252 passed_on
= passon(passon_arg
, (*s
)->data
, (*s
)->used TSRMLS_CC
);
254 if (passed_on
== PHP_HTTP_BUFFER_PASS0
) {
259 php_http_buffer_cut(*s
, 0, passed_on
);
263 return passed_on
- passed_in
;
266 PHP_HTTP_BUFFER_API
size_t php_http_buffer_chunked_input(php_http_buffer_t
**s
, size_t chunk_size
, php_http_buffer_pass_func_t passin
, void *opaque TSRMLS_DC
)
268 php_http_buffer_t
*str
;
272 *s
= php_http_buffer_init_ex(NULL
, chunk_size
, chunk_size
? PHP_HTTP_BUFFER_INIT_PREALLOC
: 0);
276 php_http_buffer_resize(str
, chunk_size
);
277 passed
= passin(opaque
, str
->data
+ str
->used
, chunk_size TSRMLS_CC
);
279 if (passed
!= PHP_HTTP_BUFFER_PASS0
) {
284 php_http_buffer_fix(str
);
289 #ifdef PHP_HTTP_BUFFER_EXTENDED
291 PHP_HTTP_BUFFER_API
int php_http_buffer_cmp(php_http_buffer_t
*left
, php_http_buffer_t
*right
)
293 if (left
->used
> right
->used
) {
295 } else if (right
->used
> left
->used
) {
298 return memcmp(left
->data
, right
->data
, left
->used
);
302 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_copy(const php_http_buffer_t
*from
, php_http_buffer_t
*to
)
306 to
= php_http_buffer_clone(from
, to
);
308 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_append(to
, from
->data
, from
->used
)) {
310 php_http_buffer_free(&to
);
312 php_http_buffer_dtor(to
);
318 PHP_HTTP_BUFFER_API
size_t php_http_buffer_insert(php_http_buffer_t
*buf
, const char *insert
, size_t insert_len
, size_t offset
)
320 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize(buf
, insert_len
)) {
321 return PHP_HTTP_BUFFER_NOMEM
;
323 memmove(buf
->data
+ offset
+ insert_len
, buf
->data
+ offset
, insert_len
);
324 memcpy(buf
->data
+ offset
, insert
, insert_len
);
325 buf
->used
+= insert_len
;
326 buf
->free
-= insert_len
;
330 PHP_HTTP_BUFFER_API
size_t php_http_buffer_insertf(php_http_buffer_t
*buf
, size_t offset
, const char *format
, ...)
334 size_t insert_len
, alloc
;
336 va_start(argv
, format
);
337 insert_len
= vspprintf(&insert
, 0, format
, argv
);
340 alloc
= php_http_buffer_insert(buf
, insert
, insert_len
, offset
);
343 if (PHP_HTTP_BUFFER_NOMEM
== alloc
) {
344 return PHP_HTTP_BUFFER_NOMEM
;
349 PHP_HTTP_BUFFER_API
size_t php_http_buffer_prepend(php_http_buffer_t
*buf
, const char *prepend
, size_t prepend_len
)
351 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize(buf
, prepend_len
)) {
352 return PHP_HTTP_BUFFER_NOMEM
;
354 memmove(buf
->data
+ prepend_len
, buf
->data
, buf
->used
);
355 memcpy(buf
->data
, prepend
, prepend_len
);
356 buf
->used
+= prepend_len
;
357 buf
->free
-= prepend_len
;
361 PHP_HTTP_BUFFER_API
size_t php_http_buffer_prependf(php_http_buffer_t
*buf
, const char *format
, ...)
365 size_t prepend_len
, alloc
;
367 va_start(argv
, format
);
368 prepend_len
= vspprintf(&prepend
, 0, format
, argv
);
371 alloc
= php_http_buffer_prepend(buf
, prepend
, prepend_len
);
374 if (PHP_HTTP_BUFFER_NOMEM
== alloc
) {
375 return PHP_HTTP_BUFFER_NOMEM
;
380 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_sub(const php_http_buffer_t
*buf
, size_t offset
, size_t length
)
382 if (offset
>= buf
->used
) {
385 size_t need
= 1 + ((length
+ offset
) > buf
->used
? (buf
->used
- offset
) : (length
- offset
));
386 php_http_buffer_t
*sub
= php_http_buffer_init_ex(NULL
, need
, PHP_HTTP_BUFFER_INIT_PREALLOC
| (buf
->pmem
? PHP_HTTP_BUFFER_INIT_PERSISTENT
:0));
388 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_append(sub
, buf
->data
+ offset
, need
)) {
389 php_http_buffer_free(&sub
);
391 sub
->size
= buf
->size
;
398 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_right(const php_http_buffer_t
*buf
, size_t length
)
400 if (length
< buf
->used
) {
401 return php_http_buffer_sub(buf
, buf
->used
- length
, length
);
403 return php_http_buffer_sub(buf
, 0, buf
->used
);
408 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_merge_va(php_http_buffer_t
*buf
, unsigned argc
, va_list argv
)
411 buf
= php_http_buffer_init(buf
);
415 php_http_buffer_free_t f
= va_arg(argv
, php_http_buffer_free_t
);
416 php_http_buffer_t
*current
= va_arg(argv
, php_http_buffer_t
*);
417 php_http_buffer_append(buf
, current
->data
, current
->used
);
418 FREE_PHP_HTTP_BUFFER(f
, current
);
425 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_merge_ex(php_http_buffer_t
*buf
, unsigned argc
, ...)
428 php_http_buffer_t
*ret
;
430 va_start(argv
, argc
);
431 ret
= php_http_buffer_merge_va(buf
, argc
, argv
);
436 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_merge(unsigned argc
, ...)
439 php_http_buffer_t
*ret
;
441 va_start(argv
, argc
);
442 ret
= php_http_buffer_merge_va(NULL
, argc
, argv
);
454 * vim600: sw=4 ts=4 fdm=marker