comparison: ucx/buffer.h
ucx/buffer.h
- changeset 76
- 655020a30e77
- parent 69
- fb59270b1de3
- child 81
- 86a23238d8a1
equal
deleted
inserted
replaced
| 75:990734f548ef | 76:655020a30e77 |
|---|---|
| 14 /* the buffer may automatically double its size on write operations */ | 14 /* the buffer may automatically double its size on write operations */ |
| 15 #define UCX_BUFFER_AUTOEXTEND 0x02 | 15 #define UCX_BUFFER_AUTOEXTEND 0x02 |
| 16 | 16 |
| 17 /* the user shall not modify values, but may get the latest pointer */ | 17 /* the user shall not modify values, but may get the latest pointer */ |
| 18 typedef struct { | 18 typedef struct { |
| 19 void *space; | 19 char *space; |
| 20 size_t pos; | 20 size_t pos; |
| 21 size_t capacity; | |
| 21 size_t size; | 22 size_t size; |
| 22 int flags; | 23 int flags; |
| 23 } UcxBuffer; | 24 } UcxBuffer; |
| 24 | 25 |
| 25 /* if space is NULL, new space is allocated and the autofree flag is enforced */ | 26 /* if space is NULL, new space is allocated and the autofree flag is enforced */ |
| 26 UcxBuffer *ucx_buffer_new(void *space, size_t length, int flags); | 27 UcxBuffer *ucx_buffer_new(void *space, size_t size, int flags); |
| 27 void ucx_buffer_free(UcxBuffer* buffer); | 28 void ucx_buffer_free(UcxBuffer* buffer); |
| 28 | 29 |
| 29 /* | 30 /* |
| 30 * the autofree flag is enforced for the new buffer | 31 * the autofree flag is enforced for the new buffer |
| 31 * if length is zero, the whole remaining buffer shall be extracted | 32 * if length is zero, the whole remaining buffer shall be extracted |
| 32 * the position of the new buffer is set to zero | 33 * the position of the new buffer is set to zero |
| 33 */ | 34 */ |
| 34 UcxBuffer *restrict ucx_buffer_extract(UcxBuffer *restrict src, | 35 UcxBuffer* ucx_buffer_extract(UcxBuffer *src, |
| 35 size_t start, size_t length, int flags); | 36 size_t start, size_t length, int flags); |
| 36 #define ucx_buffer_clone(src,flags) \ | 37 #define ucx_buffer_clone(src,flags) \ |
| 37 ucx_buffer_extract(src, 0, 0, flags) | 38 ucx_buffer_extract(src, 0, 0, flags) |
| 38 | 39 |
| 39 /* | 40 /* |
| 49 * | 50 * |
| 50 */ | 51 */ |
| 51 int ucx_buffer_seek(UcxBuffer *buffer, off_t offset, int whence); | 52 int ucx_buffer_seek(UcxBuffer *buffer, off_t offset, int whence); |
| 52 | 53 |
| 53 /* | 54 /* |
| 54 * returns non-zero, iff the current buffer position has exceeded the last | 55 * returns non-zero, if the current buffer position has exceeded the last |
| 55 * available byte of the underlying buffer | 56 * available byte of the underlying buffer |
| 56 * | 57 * |
| 57 */ | 58 */ |
| 58 int ucx_buffer_eof(UcxBuffer *buffer); | 59 int ucx_buffer_eof(UcxBuffer *buffer); |
| 59 | 60 |
| 60 size_t ucx_bufio(void *d, size_t s, size_t n, UcxBuffer* b, _Bool read); | 61 |
| 62 int ucx_buffere_extend(UcxBuffer *buffer, size_t len); | |
| 63 | |
| 64 size_t ucx_buffer_write(const void *ptr, size_t size, size_t nitems, | |
| 65 UcxBuffer *buffer); | |
| 66 | |
| 67 size_t ucx_buffer_read(void *ptr, size_t size, size_t nitems, | |
| 68 UcxBuffer *buffer); | |
| 69 | |
| 61 /* when autoextend is enabled, ensure you get the latest pointer to the data */ | 70 /* when autoextend is enabled, ensure you get the latest pointer to the data */ |
| 62 #define ucx_buffer_write(data, itemsize, nitems, buffer) \ | 71 //define ucx_buffer_write(data, itemsize, nitems, buffer) \ |
| 63 ucx_bufio(data, itemsize, nitems, buffer, 0) | 72 // ucx_bufio(data, itemsize, nitems, buffer, 0) |
| 64 #define ucx_buffer_read(data, itemsize, nitems, buffer) \ | 73 //define ucx_buffer_read(data, itemsize, nitems, buffer) \ |
| 65 ucx_bufio(data, itemsize, nitems, buffer, 1) | 74 // ucx_bufio(data, itemsize, nitems, buffer, 1) |
| 66 int ucx_buffer_putc(UcxBuffer *b, int c); | 75 int ucx_buffer_putc(UcxBuffer *b, int c); |
| 67 int ucx_buffer_getc(UcxBuffer *b); | 76 int ucx_buffer_getc(UcxBuffer *b); |
| 77 | |
| 78 | |
| 79 /* | |
| 80 * copies all bytes from s1 to s2 | |
| 81 * uses the read function r to read from s1 und writes the data using the | |
| 82 * write function w to s2 | |
| 83 * returns the number of bytes copied | |
| 84 */ | |
| 85 size_t ucx_buffer_generic_copy(void *s1, void *s2, read_func r, write_func w, | |
| 86 size_t bufsize); | |
| 87 | |
| 88 | |
| 89 #define UCX_DEFAULT_BUFFER_SIZE 0x4000000 | |
| 90 | |
| 91 #define ucx_buffer_copy(s1,s2,r,w) \ | |
| 92 ucx_buffer_generic_copy(s1, s2, (read_func)r, (write_func)w, \ | |
| 93 UCX_DEFAULT_BUFFER_SIZE) | |
| 68 | 94 |
| 69 #ifdef __cplusplus | 95 #ifdef __cplusplus |
| 70 } | 96 } |
| 71 #endif | 97 #endif |
| 72 | 98 |
