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
size_t php_http_buffer_shrink(php_http_buffer_t
*buf
)
77 /* avoid another realloc on fixation */
79 char *ptr
= perealloc(buf
->data
, buf
->used
+ 1, buf
->pmem
);
84 return PHP_HTTP_BUFFER_NOMEM
;
91 PHP_HTTP_BUFFER_API
size_t php_http_buffer_append(php_http_buffer_t
*buf
, const char *append
, size_t append_len
)
93 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize(buf
, append_len
)) {
94 return PHP_HTTP_BUFFER_NOMEM
;
96 memcpy(buf
->data
+ buf
->used
, append
, append_len
);
97 buf
->used
+= append_len
;
98 buf
->free
-= append_len
;
102 PHP_HTTP_BUFFER_API
size_t php_http_buffer_appendf(php_http_buffer_t
*buf
, const char *format
, ...)
106 size_t append_len
, alloc
;
108 va_start(argv
, format
);
109 append_len
= vspprintf(&append
, 0, format
, argv
);
112 alloc
= php_http_buffer_append(buf
, append
, append_len
);
115 if (PHP_HTTP_BUFFER_NOMEM
== alloc
) {
116 return PHP_HTTP_BUFFER_NOMEM
;
121 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
)
123 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize(buf
, insert_len
)) {
124 return PHP_HTTP_BUFFER_NOMEM
;
126 memmove(buf
->data
+ offset
+ insert_len
, buf
->data
+ offset
, insert_len
);
127 memcpy(buf
->data
+ offset
, insert
, insert_len
);
128 buf
->used
+= insert_len
;
129 buf
->free
-= insert_len
;
133 PHP_HTTP_BUFFER_API
size_t php_http_buffer_insertf(php_http_buffer_t
*buf
, size_t offset
, const char *format
, ...)
137 size_t insert_len
, alloc
;
139 va_start(argv
, format
);
140 insert_len
= vspprintf(&insert
, 0, format
, argv
);
143 alloc
= php_http_buffer_insert(buf
, insert
, insert_len
, offset
);
146 if (PHP_HTTP_BUFFER_NOMEM
== alloc
) {
147 return PHP_HTTP_BUFFER_NOMEM
;
152 PHP_HTTP_BUFFER_API
size_t php_http_buffer_prepend(php_http_buffer_t
*buf
, const char *prepend
, size_t prepend_len
)
154 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize(buf
, prepend_len
)) {
155 return PHP_HTTP_BUFFER_NOMEM
;
157 memmove(buf
->data
+ prepend_len
, buf
->data
, buf
->used
);
158 memcpy(buf
->data
, prepend
, prepend_len
);
159 buf
->used
+= prepend_len
;
160 buf
->free
-= prepend_len
;
164 PHP_HTTP_BUFFER_API
size_t php_http_buffer_prependf(php_http_buffer_t
*buf
, const char *format
, ...)
168 size_t prepend_len
, alloc
;
170 va_start(argv
, format
);
171 prepend_len
= vspprintf(&prepend
, 0, format
, argv
);
174 alloc
= php_http_buffer_prepend(buf
, prepend
, prepend_len
);
177 if (PHP_HTTP_BUFFER_NOMEM
== alloc
) {
178 return PHP_HTTP_BUFFER_NOMEM
;
183 PHP_HTTP_BUFFER_API
char *php_http_buffer_data(const php_http_buffer_t
*buf
, char **into
, size_t *len
)
185 char *copy
= ecalloc(1, buf
->used
+ 1);
186 memcpy(copy
, buf
->data
, buf
->used
);
196 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_copy(const php_http_buffer_t
*from
, php_http_buffer_t
*to
)
200 to
= php_http_buffer_clone(from
, to
);
202 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_append(to
, from
->data
, from
->used
)) {
204 php_http_buffer_free(&to
);
206 php_http_buffer_dtor(to
);
212 PHP_HTTP_BUFFER_API
size_t php_http_buffer_cut(php_http_buffer_t
*buf
, size_t offset
, size_t length
)
214 if (offset
> buf
->used
) {
217 if (offset
+ length
> buf
->used
) {
218 length
= buf
->used
- offset
;
220 memmove(buf
->data
+ offset
, buf
->data
+ offset
+ length
, buf
->used
- length
- offset
);
226 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_sub(const php_http_buffer_t
*buf
, size_t offset
, size_t length
)
228 if (offset
>= buf
->used
) {
231 size_t need
= 1 + ((length
+ offset
) > buf
->used
? (buf
->used
- offset
) : (length
- offset
));
232 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));
234 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_append(sub
, buf
->data
+ offset
, need
)) {
235 php_http_buffer_free(&sub
);
237 sub
->size
= buf
->size
;
244 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_right(const php_http_buffer_t
*buf
, size_t length
)
246 if (length
< buf
->used
) {
247 return php_http_buffer_sub(buf
, buf
->used
- length
, length
);
249 return php_http_buffer_sub(buf
, 0, buf
->used
);
254 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_merge_va(php_http_buffer_t
*buf
, unsigned argc
, va_list argv
)
257 buf
= php_http_buffer_init(buf
);
261 php_http_buffer_free_t f
= va_arg(argv
, php_http_buffer_free_t
);
262 php_http_buffer_t
*current
= va_arg(argv
, php_http_buffer_t
*);
263 php_http_buffer_append(buf
, current
->data
, current
->used
);
264 FREE_PHP_HTTP_BUFFER(f
, current
);
271 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_merge_ex(php_http_buffer_t
*buf
, unsigned argc
, ...)
274 php_http_buffer_t
*ret
;
276 va_start(argv
, argc
);
277 ret
= php_http_buffer_merge_va(buf
, argc
, argv
);
282 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_merge(unsigned argc
, ...)
285 php_http_buffer_t
*ret
;
287 va_start(argv
, argc
);
288 ret
= php_http_buffer_merge_va(NULL
, argc
, argv
);
293 PHP_HTTP_BUFFER_API php_http_buffer_t
*php_http_buffer_fix(php_http_buffer_t
*buf
)
295 if (PHP_HTTP_BUFFER_NOMEM
== php_http_buffer_resize_ex(buf
, 1, 1, 0)) {
298 buf
->data
[buf
->used
] = '\0';
302 PHP_HTTP_BUFFER_API
int php_http_buffer_cmp(php_http_buffer_t
*left
, php_http_buffer_t
*right
)
304 if (left
->used
> right
->used
) {
306 } else if (right
->used
> left
->used
) {
309 return memcmp(left
->data
, right
->data
, left
->used
);
313 PHP_HTTP_BUFFER_API
void php_http_buffer_reset(php_http_buffer_t
*buf
)
315 buf
->free
+= buf
->used
;
319 PHP_HTTP_BUFFER_API
void php_http_buffer_dtor(php_http_buffer_t
*buf
)
322 pefree(buf
->data
, buf
->pmem
);
329 PHP_HTTP_BUFFER_API
void php_http_buffer_free(php_http_buffer_t
**buf
)
332 php_http_buffer_dtor(*buf
);
333 pefree(*buf
, (*buf
)->pmem
);
338 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
)
340 php_http_buffer_t
*storage
;
345 *s
= php_http_buffer_init_ex(NULL
, chunk_size
<< 1, chunk_size
? PHP_HTTP_BUFFER_INIT_PREALLOC
: 0);
350 php_http_buffer_append(storage
, data
, data_len
);
354 php_http_buffer_data(storage
, chunk
, &chunk_size
);
355 php_http_buffer_free(s
);
359 if (storage
->used
>= (chunk_size
= storage
->size
>> 1)) {
360 *chunk
= estrndup(storage
->data
, chunk_size
);
361 php_http_buffer_cut(storage
, 0, chunk_size
);
368 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
)
373 while ((got
= php_http_buffer_chunk_buffer(s
, data
, data_len
, &chunk
, chunk_len
))) {
374 passout(opaque
, chunk
, got TSRMLS_CC
);
376 /* we already got the last chunk,
377 and freed all resources */
382 STR_SET(chunk
, NULL
);
387 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
)
389 size_t passed_on
= 0, passed_in
= php_http_buffer_chunked_input(&s
, chunk_size
, passin
, passin_arg TSRMLS_CC
);
391 if (passed_in
== PHP_HTTP_BUFFER_PASS0
) {
395 passed_on
= passon(passon_arg
, s
->data
, passed_in TSRMLS_CC
);
397 if (passed_on
== PHP_HTTP_BUFFER_PASS0
) {
402 php_http_buffer_cut(s
, 0, passed_on
);
406 return passed_on
- passed_in
;
409 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
)
411 php_http_buffer_t
*str
;
415 *s
= php_http_buffer_init_ex(NULL
, chunk_size
, chunk_size
? PHP_HTTP_BUFFER_INIT_PREALLOC
: 0);
419 php_http_buffer_resize(str
, chunk_size
);
420 passed
= passin(opaque
, str
->data
+ str
->used
, chunk_size TSRMLS_CC
);
422 if (passed
!= PHP_HTTP_BUFFER_PASS0
) {
427 php_http_buffer_fix(str
);
437 * vim600: sw=4 ts=4 fdm=marker