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-rw-r--r--libnetdata/buffer/buffer.c466
1 files changed, 219 insertions, 247 deletions
diff --git a/libnetdata/buffer/buffer.c b/libnetdata/buffer/buffer.c
index eeb28320..142fbca1 100644
--- a/libnetdata/buffer/buffer.c
+++ b/libnetdata/buffer/buffer.c
@@ -2,39 +2,16 @@
#include "../libnetdata.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)
-{
+void buffer_reset(BUFFER *wb) {
buffer_flush(wb);
- wb->contenttype = CT_TEXT_PLAIN;
+ wb->content_type = CT_TEXT_PLAIN;
wb->options = 0;
wb->date = 0;
wb->expires = 0;
@@ -52,8 +29,7 @@ const char *buffer_tostring(BUFFER *wb)
return(wb->buffer);
}
-void buffer_char_replace(BUFFER *wb, char from, char to)
-{
+void buffer_char_replace(BUFFER *wb, char from, char to) {
char *s = wb->buffer, *end = &wb->buffer[wb->len];
while(s != end) {
@@ -64,212 +40,25 @@ void buffer_char_replace(BUFFER *wb, char from, char to)
buffer_overflow_check(wb);
}
-// This trick seems to give an 80% speed increase in 32bit systems
-// print_number_llu_r() will just print the digits up to the
-// point the remaining value fits in 32 bits, and then calls
-// print_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) {
- switch (sizeof(void *)) {
- case 4:
- str = (uvalue > (unsigned long long) 0xffffffff) ? print_number_llu_r(str, uvalue) :
- print_number_lu_r(str, uvalue);
- break;
- case 8:
- do {
- *str++ = (char) ('0' + (uvalue % 10));
- } while (uvalue /= 10);
- break;
- default:
- fatal("Netdata supports only 32-bit & 64-bit systems.");
- }
-
- 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;
-
- switch (sizeof(void *)) {
- case 4:
- wstr = (uvalue > (unsigned long long) 0xffffffff) ? print_number_llu_r(wstr, uvalue) :
- print_number_lu_r(wstr, uvalue);
- break;
- case 8:
- do {
- *wstr++ = (char) ('0' + (uvalue % 10));
- } while (uvalue /= 10);
- break;
- default:
- fatal("Netdata supports only 32-bit & 64-bit systems.");
+void buffer_print_sn_flags(BUFFER *wb, SN_FLAGS flags, bool send_anomaly_bit) {
+ if(unlikely(flags == SN_EMPTY_SLOT)) {
+ buffer_fast_strcat(wb, "E", 1);
+ return;
}
- // 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_print_ll(BUFFER *wb, long long value)
-{
- buffer_need_bytes(wb, 50);
-
- if(value < 0) {
- buffer_fast_strcat(wb, "-", 1);
- value = -value;
+ size_t printed = 0;
+ if(likely(send_anomaly_bit && (flags & SN_FLAG_NOT_ANOMALOUS))) {
+ buffer_fast_strcat(wb, "A", 1);
+ printed++;
}
- buffer_print_llu(wb, value);
-}
-
-static unsigned char bits03_to_hex[16] = {
- [0] = '0',
- [1] = '1',
- [2] = '2',
- [3] = '3',
- [4] = '4',
- [5] = '5',
- [6] = '6',
- [7] = '7',
- [8] = '8',
- [9] = '9',
- [10] = 'A',
- [11] = 'B',
- [12] = 'C',
- [13] = 'D',
- [14] = 'E',
- [15] = 'F'
-};
-
-void buffer_print_llu_hex(BUFFER *wb, unsigned long long value)
-{
- unsigned char buffer[sizeof(unsigned long long) * 2 + 2 + 1]; // 8 bytes * 2 + '0x' + '\0'
- unsigned char *e = &buffer[sizeof(unsigned long long) * 2 + 2];
- unsigned char *p = e;
-
- *p-- = '\0';
- *p-- = bits03_to_hex[value & 0xF];
- value >>= 4;
- if(value) {
- *p-- = bits03_to_hex[value & 0xF];
- value >>= 4;
-
- while(value) {
- *p-- = bits03_to_hex[value & 0xF];
- value >>= 4;
-
- if(value) {
- *p-- = bits03_to_hex[value & 0xF];
- value >>= 4;
- }
- }
+ if(unlikely(flags & SN_FLAG_RESET)) {
+ buffer_fast_strcat(wb, "R", 1);
+ printed++;
}
- *p-- = 'x';
- *p = '0';
- buffer_fast_strcat(wb, (char *)p, e - p);
-}
-
-void buffer_fast_strcat(BUFFER *wb, const char *txt, size_t len) {
- if(unlikely(!txt || !*txt)) return;
-
- buffer_need_bytes(wb, len + 1);
-
- char *s = &wb->buffer[wb->len];
- const char *end = &txt[len + 1];
-
- while(txt != end)
- *s++ = *txt++;
-
- wb->len += len;
-
- // keep it NULL terminating
- // not counting it at wb->len
- wb->buffer[wb->len] = '\0';
-}
-
-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_fast_strcat(wb, txt, len);
- }
- else {
- // terminate the string
- // without increasing the length
- buffer_need_bytes(wb, (size_t)1);
- wb->buffer[wb->len] = '\0';
- }
-}
-
-void buffer_strcat_jsonescape(BUFFER *wb, const char *txt)
-{
- while(*txt) {
- switch(*txt) {
- case '\\':
- buffer_need_bytes(wb, 2);
- wb->buffer[wb->len++] = '\\';
- wb->buffer[wb->len++] = '\\';
- break;
- case '"':
- buffer_need_bytes(wb, 2);
- wb->buffer[wb->len++] = '\\';
- wb->buffer[wb->len++] = '"';
- break;
- default: {
- buffer_need_bytes(wb, 1);
- wb->buffer[wb->len++] = *txt;
- }
- }
- txt++;
- }
-
- buffer_overflow_check(wb);
+ if(!printed)
+ buffer_fast_strcat(wb, "''", 2);
}
void buffer_strcat_htmlescape(BUFFER *wb, const char *txt)
@@ -358,25 +147,6 @@ void buffer_sprintf(BUFFER *wb, const char *fmt, ...)
// the buffer is \0 terminated by vsnprintf
}
-
-void buffer_rrd_value(BUFFER *wb, NETDATA_DOUBLE value)
-{
- buffer_need_bytes(wb, 50);
-
- if(isnan(value) || isinf(value)) {
- buffer_strcat(wb, "null");
- return;
- }
- else
- wb->len += print_netdata_double(&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)
{
@@ -482,7 +252,7 @@ BUFFER *buffer_create(size_t size, size_t *statistics)
b->buffer = mallocz(size + sizeof(BUFFER_OVERFLOW_EOF) + 2);
b->buffer[0] = '\0';
b->size = size;
- b->contenttype = CT_TEXT_PLAIN;
+ b->content_type = CT_TEXT_PLAIN;
b->statistics = statistics;
buffer_overflow_init(b);
buffer_overflow_check(b);
@@ -531,3 +301,205 @@ void buffer_increase(BUFFER *b, size_t free_size_required) {
buffer_overflow_init(b);
buffer_overflow_check(b);
}
+
+// ----------------------------------------------------------------------------
+
+void buffer_json_initialize(BUFFER *wb, const char *key_quote, const char *value_quote, int depth,
+ bool add_anonymous_object, bool minify) {
+ strncpyz(wb->json.key_quote, key_quote, BUFFER_QUOTE_MAX_SIZE);
+ strncpyz(wb->json.value_quote, value_quote, BUFFER_QUOTE_MAX_SIZE);
+
+ wb->json.minify = minify;
+ wb->json.depth = (int8_t)(depth - 1);
+ _buffer_json_depth_push(wb, BUFFER_JSON_OBJECT);
+
+ if(add_anonymous_object)
+ buffer_fast_strcat(wb, "{", 1);
+}
+
+void buffer_json_finalize(BUFFER *wb) {
+ while(wb->json.depth >= 0) {
+ switch(wb->json.stack[wb->json.depth].type) {
+ case BUFFER_JSON_OBJECT:
+ buffer_json_object_close(wb);
+ break;
+
+ case BUFFER_JSON_ARRAY:
+ buffer_json_array_close(wb);
+ break;
+
+ default:
+ internal_fatal(true, "BUFFER: unknown json member type in stack");
+ break;
+ }
+ }
+
+ if(!wb->json.minify)
+ buffer_fast_strcat(wb, "\n", 1);
+}
+
+// ----------------------------------------------------------------------------
+
+const char hex_digits[16] = "0123456789ABCDEF";
+const char base64_digits[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+unsigned char hex_value_from_ascii[256];
+unsigned char base64_value_from_ascii[256];
+
+__attribute__((constructor)) void initialize_ascii_maps(void) {
+ for(size_t i = 0 ; i < 256 ; i++) {
+ hex_value_from_ascii[i] = 255;
+ base64_value_from_ascii[i] = 255;
+ }
+
+ for(size_t i = 0; i < 16 ; i++)
+ hex_value_from_ascii[(int)hex_digits[i]] = i;
+
+ for(size_t i = 0; i < 64 ; i++)
+ base64_value_from_ascii[(int)base64_digits[i]] = i;
+}
+
+// ----------------------------------------------------------------------------
+// unit test
+
+static int buffer_expect(BUFFER *wb, const char *expected) {
+ const char *generated = buffer_tostring(wb);
+
+ if(strcmp(generated, expected) != 0) {
+ error("BUFFER: mismatch.\nGenerated:\n%s\nExpected:\n%s\n",
+ generated, expected);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int buffer_uint64_roundtrip(BUFFER *wb, NUMBER_ENCODING encoding, uint64_t value, const char *expected) {
+ int errors = 0;
+ buffer_flush(wb);
+ buffer_print_uint64_encoded(wb, encoding, value);
+
+ if(expected)
+ errors += buffer_expect(wb, expected);
+
+ uint64_t v = str2ull_encoded(buffer_tostring(wb));
+ if(v != value) {
+ error("BUFFER: string '%s' does resolves to %llu, expected %llu",
+ buffer_tostring(wb), (unsigned long long)v, (unsigned long long)value);
+ errors++;
+ }
+ buffer_flush(wb);
+ return errors;
+}
+
+static int buffer_int64_roundtrip(BUFFER *wb, NUMBER_ENCODING encoding, int64_t value, const char *expected) {
+ int errors = 0;
+ buffer_flush(wb);
+ buffer_print_int64_encoded(wb, encoding, value);
+
+ if(expected)
+ errors += buffer_expect(wb, expected);
+
+ int64_t v = str2ll_encoded(buffer_tostring(wb));
+ if(v != value) {
+ error("BUFFER: string '%s' does resolves to %lld, expected %lld",
+ buffer_tostring(wb), (long long)v, (long long)value);
+ errors++;
+ }
+ buffer_flush(wb);
+ return errors;
+}
+
+static int buffer_double_roundtrip(BUFFER *wb, NUMBER_ENCODING encoding, NETDATA_DOUBLE value, const char *expected) {
+ int errors = 0;
+ buffer_flush(wb);
+ buffer_print_netdata_double_encoded(wb, encoding, value);
+
+ if(expected)
+ errors += buffer_expect(wb, expected);
+
+ NETDATA_DOUBLE v = str2ndd_encoded(buffer_tostring(wb), NULL);
+ if(v != value) {
+ error("BUFFER: string '%s' does resolves to %.12f, expected %.12f",
+ buffer_tostring(wb), v, value);
+ errors++;
+ }
+ buffer_flush(wb);
+ return errors;
+}
+
+int buffer_unittest(void) {
+ int errors = 0;
+ BUFFER *wb = buffer_create(0, NULL);
+
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 0, "0");
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_HEX, 0, "0x0");
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_BASE64, 0, "#A");
+
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 1676071986, "1676071986");
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_HEX, 1676071986, "0x63E6D432");
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_BASE64, 1676071986, "#Bj5tQy");
+
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 18446744073709551615ULL, "18446744073709551615");
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_HEX, 18446744073709551615ULL, "0xFFFFFFFFFFFFFFFF");
+ buffer_uint64_roundtrip(wb, NUMBER_ENCODING_BASE64, 18446744073709551615ULL, "#P//////////");
+
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 0, "0");
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_HEX, 0, "0x0");
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_BASE64, 0, "#A");
+
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_DECIMAL, -1676071986, "-1676071986");
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_HEX, -1676071986, "-0x63E6D432");
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_BASE64, -1676071986, "-#Bj5tQy");
+
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_DECIMAL, (int64_t)-9223372036854775807ULL, "-9223372036854775807");
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_HEX, (int64_t)-9223372036854775807ULL, "-0x7FFFFFFFFFFFFFFF");
+ buffer_int64_roundtrip(wb, NUMBER_ENCODING_BASE64, (int64_t)-9223372036854775807ULL, "-#H//////////");
+
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 0, "0");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_HEX, 0, "%0");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_BASE64, 0, "@A");
+
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 1.5, "1.5");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_HEX, 1.5, "%3FF8000000000000");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_BASE64, 1.5, "@D/4AAAAAAAA");
+
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 1.23e+14, "123000000000000");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_HEX, 1.23e+14, "%42DBF78AD3AC0000");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_BASE64, 1.23e+14, "@ELb94rTrAAA");
+
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_DECIMAL, 9.12345678901234567890123456789e+45, "9.123456789012346128e+45");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_HEX, 9.12345678901234567890123456789e+45, "%497991C25C9E4309");
+ buffer_double_roundtrip(wb, NUMBER_ENCODING_BASE64, 9.12345678901234567890123456789e+45, "@El5kcJcnkMJ");
+
+ buffer_flush(wb);
+
+ {
+ char buf[1024 + 1];
+ for(size_t i = 0; i < 1024 ;i++)
+ buf[i] = (char)(i % 26) + 'A';
+ buf[1024] = '\0';
+
+ buffer_strcat(wb, buf);
+ errors += buffer_expect(wb, buf);
+ }
+
+ buffer_flush(wb);
+
+ buffer_json_initialize(wb, "\"", "\"", 0, true, false);
+ buffer_json_finalize(wb);
+ errors += buffer_expect(wb, "{\n}\n");
+
+ buffer_flush(wb);
+
+ buffer_json_initialize(wb, "\"", "\"", 0, true, false);
+ buffer_json_member_add_string(wb, "hello", "world");
+ buffer_json_member_add_string(wb, "alpha", "this: \" is a double quote");
+ buffer_json_member_add_object(wb, "object1");
+ buffer_json_member_add_string(wb, "hello", "world");
+ buffer_json_finalize(wb);
+ errors += buffer_expect(wb, "{\n \"hello\":\"world\",\n \"alpha\":\"this: \\\" is a double quote\",\n \"object1\":{\n \"hello\":\"world\"\n }\n}\n");
+
+ buffer_free(wb);
+ return errors;
+}
+
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