diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:22:44 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:22:44 +0000 |
commit | 1e6c93250172946eeb38e94a92a1fd12c9d3011e (patch) | |
tree | 8ca5e16dfc7ad6b3bf2738ca0a48408a950f8f7e /src/web_buffer.c | |
parent | Update watch file (diff) | |
download | netdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.tar.xz netdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.zip |
Merging upstream version 1.11.0+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/web_buffer.c')
-rw-r--r-- | src/web_buffer.c | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/src/web_buffer.c b/src/web_buffer.c deleted file mode 100644 index 50c76f6d6..000000000 --- a/src/web_buffer.c +++ /dev/null @@ -1,400 +0,0 @@ -#include "common.h" - -#define BUFFER_OVERFLOW_EOF "EOF" - -static inline void buffer_overflow_init(BUFFER *b) -{ - b->buffer[b->size] = '\0'; - strcpy(&b->buffer[b->size + 1], BUFFER_OVERFLOW_EOF); -} - -#ifdef NETDATA_INTERNAL_CHECKS -#define buffer_overflow_check(b) _buffer_overflow_check(b, __FILE__, __FUNCTION__, __LINE__) -#else -#define buffer_overflow_check(b) -#endif - -static inline void _buffer_overflow_check(BUFFER *b, const char *file, const char *function, const unsigned long line) -{ - if(b->len > b->size) { - error("BUFFER: length %zu is above size %zu, at line %lu, at function %s() of file '%s'.", b->len, b->size, line, function, file); - b->len = b->size; - } - - if(b->buffer[b->size] != '\0' || strcmp(&b->buffer[b->size + 1], BUFFER_OVERFLOW_EOF) != 0) { - error("BUFFER: detected overflow at line %lu, at function %s() of file '%s'.", line, function, file); - buffer_overflow_init(b); - } -} - - -void buffer_reset(BUFFER *wb) -{ - buffer_flush(wb); - - wb->contenttype = CT_TEXT_PLAIN; - wb->options = 0; - wb->date = 0; - wb->expires = 0; - - buffer_overflow_check(wb); -} - -const char *buffer_tostring(BUFFER *wb) -{ - buffer_need_bytes(wb, 1); - wb->buffer[wb->len] = '\0'; - - buffer_overflow_check(wb); - - return(wb->buffer); -} - -void buffer_char_replace(BUFFER *wb, char from, char to) -{ - char *s = wb->buffer, *end = &wb->buffer[wb->len]; - - while(s != end) { - if(*s == from) *s = to; - s++; - } - - buffer_overflow_check(wb); -} - -// This trick seems to give an 80% speed increase in 32bit systems -// print_calculated_number_llu_r() will just print the digits up to the -// point the remaining value fits in 32 bits, and then calls -// print_calculated_number_lu_r() to print the rest with 32 bit arithmetic. - -inline char *print_number_lu_r(char *str, unsigned long uvalue) { - char *wstr = str; - - // print each digit - do *wstr++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10); - return wstr; -} - -inline char *print_number_llu_r(char *str, unsigned long long uvalue) { - char *wstr = str; - - // print each digit - do *wstr++ = (char)('0' + (uvalue % 10)); while((uvalue /= 10) && uvalue > (unsigned long long)0xffffffff); - if(uvalue) return print_number_lu_r(wstr, uvalue); - return wstr; -} - -inline char *print_number_llu_r_smart(char *str, unsigned long long uvalue) { -#ifdef ENVIRONMENT32 - if(uvalue > (unsigned long long)0xffffffff) - str = print_number_llu_r(str, uvalue); - else - str = print_number_lu_r(str, uvalue); -#else - do *str++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10); -#endif - - return str; -} - -void buffer_print_llu(BUFFER *wb, unsigned long long uvalue) -{ - buffer_need_bytes(wb, 50); - - char *str = &wb->buffer[wb->len]; - char *wstr = str; - -#ifdef ENVIRONMENT32 - if(uvalue > (unsigned long long)0xffffffff) - wstr = print_number_llu_r(wstr, uvalue); - else - wstr = print_number_lu_r(wstr, uvalue); -#else - do *wstr++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10); -#endif - - // terminate it - *wstr = '\0'; - - // reverse it - char *begin = str, *end = wstr - 1, aux; - while (end > begin) aux = *end, *end-- = *begin, *begin++ = aux; - - // return the buffer length - wb->len += wstr - str; -} - -void buffer_strcat(BUFFER *wb, const char *txt) -{ - // buffer_sprintf(wb, "%s", txt); - - if(unlikely(!txt || !*txt)) return; - - buffer_need_bytes(wb, 1); - - char *s = &wb->buffer[wb->len], *start, *end = &wb->buffer[wb->size]; - size_t len = wb->len; - - start = s; - while(*txt && s != end) - *s++ = *txt++; - - len += s - start; - - wb->len = len; - buffer_overflow_check(wb); - - if(*txt) { - debug(D_WEB_BUFFER, "strcat(): increasing web_buffer at position %zu, size = %zu\n", wb->len, wb->size); - len = strlen(txt); - buffer_increase(wb, len); - buffer_strcat(wb, txt); - } - else { - // terminate the string - // without increasing the length - buffer_need_bytes(wb, (size_t)1); - wb->buffer[wb->len] = '\0'; - } -} - -void buffer_strcat_htmlescape(BUFFER *wb, const char *txt) -{ - while(*txt) { - switch(*txt) { - case '&': buffer_strcat(wb, "&"); break; - case '<': buffer_strcat(wb, "<"); break; - case '>': buffer_strcat(wb, ">"); break; - case '"': buffer_strcat(wb, """); break; - case '/': buffer_strcat(wb, "/"); break; - case '\'': buffer_strcat(wb, "'"); break; - default: { - buffer_need_bytes(wb, 1); - wb->buffer[wb->len++] = *txt; - } - } - txt++; - } - - buffer_overflow_check(wb); -} - -void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) -{ - if(unlikely(!fmt || !*fmt)) return; - - buffer_need_bytes(wb, len + 1); - - va_list args; - va_start(args, fmt); - wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args); - va_end(args); - - buffer_overflow_check(wb); - - // the buffer is \0 terminated by vsnprintfz -} - -void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args) -{ - if(unlikely(!fmt || !*fmt)) return; - - buffer_need_bytes(wb, 2); - - size_t len = wb->size - wb->len - 1; - - wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args); - - buffer_overflow_check(wb); - - // the buffer is \0 terminated by vsnprintfz -} - -void buffer_sprintf(BUFFER *wb, const char *fmt, ...) -{ - if(unlikely(!fmt || !*fmt)) return; - - va_list args; - size_t wrote = 0, need = 2, multiplier = 0, len; - - do { - need += wrote + multiplier * WEB_DATA_LENGTH_INCREASE_STEP; - multiplier++; - - debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %zu, size = %zu, by %zu bytes (wrote = %zu)\n", wb->len, wb->size, need, wrote); - buffer_need_bytes(wb, need); - - len = wb->size - wb->len - 1; - - va_start(args, fmt); - wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args); - va_end(args); - - } while(wrote >= len); - - wb->len += wrote; - - // the buffer is \0 terminated by vsnprintf -} - - -void buffer_rrd_value(BUFFER *wb, calculated_number value) -{ - buffer_need_bytes(wb, 50); - - if(isnan(value) || isinf(value)) { - buffer_strcat(wb, "null"); - return; - } - else - wb->len += print_calculated_number(&wb->buffer[wb->len], value); - - // terminate it - buffer_need_bytes(wb, 1); - wb->buffer[wb->len] = '\0'; - - buffer_overflow_check(wb); -} - -// generate a javascript date, the fastest possible way... -void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds) -{ - // 10 20 30 = 35 - // 01234567890123456789012345678901234 - // Date(2014,04,01,03,28,20) - - buffer_need_bytes(wb, 30); - - char *b = &wb->buffer[wb->len], *p; - unsigned int *q = (unsigned int *)b; - - #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - *q++ = 0x65746144; // "Date" backwards. - #else - *q++ = 0x44617465; // "Date" - #endif - p = (char *)q; - - *p++ = '('; - *p++ = '0' + year / 1000; year %= 1000; - *p++ = '0' + year / 100; year %= 100; - *p++ = '0' + year / 10; - *p++ = '0' + year % 10; - *p++ = ','; - *p = '0' + month / 10; if (*p != '0') p++; - *p++ = '0' + month % 10; - *p++ = ','; - *p = '0' + day / 10; if (*p != '0') p++; - *p++ = '0' + day % 10; - *p++ = ','; - *p = '0' + hours / 10; if (*p != '0') p++; - *p++ = '0' + hours % 10; - *p++ = ','; - *p = '0' + minutes / 10; if (*p != '0') p++; - *p++ = '0' + minutes % 10; - *p++ = ','; - *p = '0' + seconds / 10; if (*p != '0') p++; - *p++ = '0' + seconds % 10; - - unsigned short *r = (unsigned short *)p; - -#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - *r++ = 0x0029; // ")\0" backwards. - #else - *r++ = 0x2900; // ")\0" - #endif - - wb->len += (size_t)((char *)r - b - 1); - - // terminate it - wb->buffer[wb->len] = '\0'; - buffer_overflow_check(wb); -} - -// generate a date, the fastest possible way... -void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds) -{ - // 10 20 30 = 35 - // 01234567890123456789012345678901234 - // 2014-04-01 03:28:20 - - buffer_need_bytes(wb, 36); - - char *b = &wb->buffer[wb->len]; - char *p = b; - - *p++ = '0' + year / 1000; year %= 1000; - *p++ = '0' + year / 100; year %= 100; - *p++ = '0' + year / 10; - *p++ = '0' + year % 10; - *p++ = '-'; - *p++ = '0' + month / 10; - *p++ = '0' + month % 10; - *p++ = '-'; - *p++ = '0' + day / 10; - *p++ = '0' + day % 10; - *p++ = ' '; - *p++ = '0' + hours / 10; - *p++ = '0' + hours % 10; - *p++ = ':'; - *p++ = '0' + minutes / 10; - *p++ = '0' + minutes % 10; - *p++ = ':'; - *p++ = '0' + seconds / 10; - *p++ = '0' + seconds % 10; - *p = '\0'; - - wb->len += (size_t)(p - b); - - // terminate it - wb->buffer[wb->len] = '\0'; - buffer_overflow_check(wb); -} - -BUFFER *buffer_create(size_t size) -{ - BUFFER *b; - - debug(D_WEB_BUFFER, "Creating new web buffer of size %zu.", size); - - b = callocz(1, sizeof(BUFFER)); - b->buffer = mallocz(size + sizeof(BUFFER_OVERFLOW_EOF) + 2); - b->buffer[0] = '\0'; - b->size = size; - b->contenttype = CT_TEXT_PLAIN; - buffer_overflow_init(b); - buffer_overflow_check(b); - - return(b); -} - -void buffer_free(BUFFER *b) { - if(unlikely(!b)) return; - - buffer_overflow_check(b); - - debug(D_WEB_BUFFER, "Freeing web buffer of size %zu.", b->size); - - freez(b->buffer); - freez(b); -} - -void buffer_increase(BUFFER *b, size_t free_size_required) -{ - buffer_overflow_check(b); - - size_t left = b->size - b->len; - - if(left >= free_size_required) return; - - size_t increase = free_size_required - left; - if(increase < WEB_DATA_LENGTH_INCREASE_STEP) increase = WEB_DATA_LENGTH_INCREASE_STEP; - - debug(D_WEB_BUFFER, "Increasing data buffer from size %zu to %zu.", b->size, b->size + increase); - - b->buffer = reallocz(b->buffer, b->size + increase + sizeof(BUFFER_OVERFLOW_EOF) + 2); - b->size += increase; - - buffer_overflow_init(b); - buffer_overflow_check(b); -} |