diff options
Diffstat (limited to 'libnetdata/buffer/buffer.h')
| -rw-r--r-- | libnetdata/buffer/buffer.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libnetdata/buffer/buffer.h b/libnetdata/buffer/buffer.h new file mode 100644 index 0000000..ce6f528 --- /dev/null +++ b/libnetdata/buffer/buffer.h @@ -0,0 +1,89 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_WEB_BUFFER_H +#define NETDATA_WEB_BUFFER_H 1 + +#include "../libnetdata.h" + +#define WEB_DATA_LENGTH_INCREASE_STEP 1024 + +typedef struct web_buffer { + size_t size; // allocation size of buffer, in bytes + size_t len; // current data length in buffer, in bytes + char *buffer; // the buffer itself + uint8_t contenttype; // the content type of the data in the buffer + uint8_t options; // options related to the content + time_t date; // the timestamp this content has been generated + time_t expires; // the timestamp this content expires +} BUFFER; + +// options +#define WB_CONTENT_CACHEABLE 1 +#define WB_CONTENT_NO_CACHEABLE 2 + +// content-types +#define CT_APPLICATION_JSON 1 +#define CT_TEXT_PLAIN 2 +#define CT_TEXT_HTML 3 +#define CT_APPLICATION_X_JAVASCRIPT 4 +#define CT_TEXT_CSS 5 +#define CT_TEXT_XML 6 +#define CT_APPLICATION_XML 7 +#define CT_TEXT_XSL 8 +#define CT_APPLICATION_OCTET_STREAM 9 +#define CT_APPLICATION_X_FONT_TRUETYPE 10 +#define CT_APPLICATION_X_FONT_OPENTYPE 11 +#define CT_APPLICATION_FONT_WOFF 12 +#define CT_APPLICATION_FONT_WOFF2 13 +#define CT_APPLICATION_VND_MS_FONTOBJ 14 +#define CT_IMAGE_SVG_XML 15 +#define CT_IMAGE_PNG 16 +#define CT_IMAGE_JPG 17 +#define CT_IMAGE_GIF 18 +#define CT_IMAGE_XICON 19 +#define CT_IMAGE_ICNS 20 +#define CT_IMAGE_BMP 21 +#define CT_PROMETHEUS 22 + +#define buffer_cacheable(wb) do { (wb)->options |= WB_CONTENT_CACHEABLE; if((wb)->options & WB_CONTENT_NO_CACHEABLE) (wb)->options &= ~WB_CONTENT_NO_CACHEABLE; } while(0) +#define buffer_no_cacheable(wb) do { (wb)->options |= WB_CONTENT_NO_CACHEABLE; if((wb)->options & WB_CONTENT_CACHEABLE) (wb)->options &= ~WB_CONTENT_CACHEABLE; (wb)->expires = 0; } while(0) + +#define buffer_strlen(wb) ((wb)->len) +const char *buffer_tostring(BUFFER *wb); + +#define buffer_flush(wb) wb->buffer[(wb)->len = 0] = '\0' +void buffer_reset(BUFFER *wb); + +void buffer_strcat(BUFFER *wb, const char *txt); +void buffer_fast_strcat(BUFFER *wb, const char *txt, size_t len); +void buffer_rrd_value(BUFFER *wb, NETDATA_DOUBLE value); + +void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds); +void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds); + +BUFFER *buffer_create(size_t size); +void buffer_free(BUFFER *b); +void buffer_increase(BUFFER *b, size_t free_size_required); + +void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) PRINTFLIKE(3, 4); +void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args); +void buffer_sprintf(BUFFER *wb, const char *fmt, ...) PRINTFLIKE(2,3); +void buffer_strcat_jsonescape(BUFFER *wb, const char *txt); +void buffer_strcat_htmlescape(BUFFER *wb, const char *txt); + +void buffer_char_replace(BUFFER *wb, char from, char to); + +char *print_number_lu_r(char *str, unsigned long uvalue); +char *print_number_llu_r(char *str, unsigned long long uvalue); +char *print_number_llu_r_smart(char *str, unsigned long long uvalue); + +void buffer_print_llu(BUFFER *wb, unsigned long long uvalue); +void buffer_print_ll(BUFFER *wb, long long value); +void buffer_print_llu_hex(BUFFER *wb, unsigned long long value); + +static inline void buffer_need_bytes(BUFFER *buffer, size_t needed_free_size) { + if(unlikely(buffer->size - buffer->len < needed_free_size)) + buffer_increase(buffer, needed_free_size); +} + +#endif /* NETDATA_WEB_BUFFER_H */ |