src/web_buffer.h

   1 #ifndef NETDATA_WEB_BUFFER_H
   2 #define NETDATA_WEB_BUFFER_H 1
   3
   4 #define WEB_DATA_LENGTH_INCREASE_STEP 1024
   5
   6 typedef struct web_buffer {
   7     size_t size;                // allocation size of buffer, in bytes
   8     size_t len;                 // current data length in buffer, in bytes
   9     char *buffer;               // the buffer itself
  10     uint8_t contenttype;        // the content type of the data in the buffer
  11     uint8_t options;            // options related to the content
  12     time_t date;                // the timestamp this content has been generated
  13     time_t expires;                     // the timestamp this content expires
  14 } BUFFER;
  15
  16 // options
  17 #define WB_CONTENT_CACHEABLE            1
  18 #define WB_CONTENT_NO_CACHEABLE         2
  19
  20 // content-types
  21 #define CT_APPLICATION_JSON             1
  22 #define CT_TEXT_PLAIN                   2
  23 #define CT_TEXT_HTML                    3
  24 #define CT_APPLICATION_X_JAVASCRIPT     4
  25 #define CT_TEXT_CSS                     5
  26 #define CT_TEXT_XML                     6
  27 #define CT_APPLICATION_XML              7
  28 #define CT_TEXT_XSL                     8
  29 #define CT_APPLICATION_OCTET_STREAM     9
  30 #define CT_APPLICATION_X_FONT_TRUETYPE  10
  31 #define CT_APPLICATION_X_FONT_OPENTYPE  11
  32 #define CT_APPLICATION_FONT_WOFF        12
  33 #define CT_APPLICATION_FONT_WOFF2       13
  34 #define CT_APPLICATION_VND_MS_FONTOBJ   14
  35 #define CT_IMAGE_SVG_XML                15
  36 #define CT_IMAGE_PNG                    16
  37 #define CT_IMAGE_JPG                    17
  38 #define CT_IMAGE_GIF                    18
  39 #define CT_IMAGE_XICON                  19
  40 #define CT_IMAGE_ICNS                   20
  41 #define CT_IMAGE_BMP                    21
  42 #define CT_PROMETHEUS                   22
  43
  44 #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)
  45 #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)
  46
  47 #define buffer_strlen(wb) ((wb)->len)
  48 extern const char *buffer_tostring(BUFFER *wb);
  49
  50 #define buffer_need_bytes(buffer, needed_free_size) do { if(unlikely((buffer)->size - (buffer)->len < (size_t)(needed_free_size))) buffer_increase((buffer), (size_t)(needed_free_size)); } while(0)
  51
  52 #define buffer_flush(wb) wb->buffer[(wb)->len = 0] = '\0'
  53 extern void buffer_reset(BUFFER *wb);
  54
  55 extern void buffer_strcat(BUFFER *wb, const char *txt);
  56 extern void buffer_rrd_value(BUFFER *wb, calculated_number value);
  57
  58 extern void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds);
  59 extern void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds);
  60
  61 extern BUFFER *buffer_create(size_t size);
  62 extern void buffer_free(BUFFER *b);
  63 extern void buffer_increase(BUFFER *b, size_t free_size_required);
  64
  65 extern void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) PRINTFLIKE(3, 4);
  66 extern void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args);
  67 extern void buffer_sprintf(BUFFER *wb, const char *fmt, ...) PRINTFLIKE(2,3);
  68 extern void buffer_strcat_htmlescape(BUFFER *wb, const char *txt);
  69
  70 extern void buffer_char_replace(BUFFER *wb, char from, char to);
  71
  72 extern char *print_number_lu_r(char *str, unsigned long uvalue);
  73 extern char *print_number_llu_r(char *str, unsigned long long uvalue);
  74
  75 extern void buffer_print_llu(BUFFER *wb, unsigned long long uvalue);
  76
  77 #endif /* NETDATA_WEB_BUFFER_H */