X-Git-Url: https://arthur.barton.de/gitweb/?a=blobdiff_plain;f=src%2Fweb_buffer.c;h=9f9ceda63da26a5f3d9720c863494dabe46755b8;hb=9dccc16d3763392f0b13349de18c3a838a667653;hp=1e7e2534f73ced3c094c24d1dda81deb26476a97;hpb=acc53a9ac567a1596a000e8703398d891e4f3bc1;p=netdata.git

diff --git a/src/web_buffer.c b/src/web_buffer.c
index 1e7e2534..9f9ceda6 100644
--- a/src/web_buffer.c
+++ b/src/web_buffer.c
@@ -1,23 +1,11 @@
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef STORAGE_WITH_MATH
-#include <math.h>
-#endif
-
 #include "common.h"
-#include "web_buffer.h"
-#include "log.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);
+    b->buffer[b->size] = '\0';
+    strcpy(&b->buffer[b->size + 1], BUFFER_OVERFLOW_EOF);
 }
 
 #ifdef NETDATA_INTERNAL_CHECKS
@@ -28,172 +16,247 @@ static inline void buffer_overflow_init(BUFFER *b)
 
 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 %ld is above size %ld, 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)) {
-		error("BUFFER: detected overflow at line %lu, at function %s() of file '%s'.", line, function, file);
-		buffer_overflow_init(b);
-	}
+    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)) {
+        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);
+    buffer_flush(wb);
 
-	wb->contenttype = CT_TEXT_PLAIN;
-	wb->options = 0;
-	wb->date = 0;
+    wb->contenttype = CT_TEXT_PLAIN;
+    wb->options = 0;
+    wb->date = 0;
+    wb->expires = 0;
 
-	buffer_overflow_check(wb);
+    buffer_overflow_check(wb);
 }
 
 const char *buffer_tostring(BUFFER *wb)
 {
-	buffer_need_bytes(wb, 1);
-	wb->buffer[wb->len] = '\0';
+    buffer_need_bytes(wb, 1);
+    wb->buffer[wb->len] = '\0';
 
-	buffer_overflow_check(wb);
+    buffer_overflow_check(wb);
 
-	return(wb->buffer);
+    return(wb->buffer);
 }
 
 void buffer_char_replace(BUFFER *wb, char from, char to)
 {
-	char *s = wb->buffer, *end = &wb->buffer[wb->len];
+    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;
 
-	while(s != end) {
-		if(*s == from) *s = to;
-		s++;
-	}
+    // 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;
 
-	buffer_overflow_check(wb);
+    // 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;
 }
 
+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)
 {
-	if(unlikely(!txt || !*txt)) return;
-
-	buffer_need_bytes(wb, 1);
-
-	char *s = &wb->buffer[wb->len], *end = &wb->buffer[wb->size];
-	long len = wb->len;
-
-	while(*txt && s != end) {
-		*s++ = *txt++;
-		len++;
-	}
-
-	wb->len = len;
-	buffer_overflow_check(wb);
-
-	if(*txt) {
-		debug(D_WEB_BUFFER, "strcat(): increasing web_buffer at position %ld, size = %ld\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';
-	}
+    // 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)
+{
+    char b[2] = { [0] = '\0', [1] = '\0' };
+
+    while(*txt) {
+        switch(*txt) {
+            case '&': buffer_strcat(wb, "&amp;"); break;
+            case '<': buffer_strcat(wb, "&lt;"); break;
+            case '>': buffer_strcat(wb, "&gt;"); break;
+            case '"': buffer_strcat(wb, "&quot;"); break;
+            case '/': buffer_strcat(wb, "&#x2F;"); break;
+            case '\'': buffer_strcat(wb, "&#x27;"); break;
+            default: {
+                b[0] = *txt;
+                buffer_strcat(wb, b);
+            }
+        }
+        txt++;
+    }
+}
 
 void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...)
 {
-	if(unlikely(!fmt || !*fmt)) return;
+    if(unlikely(!fmt || !*fmt)) return;
 
-	buffer_need_bytes(wb, len+1);
+    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);
+    va_list args;
+    va_start(args, fmt);
+    wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
+    va_end(args);
 
-	buffer_overflow_check(wb);
+    buffer_overflow_check(wb);
 
-	// the buffer is \0 terminated by vsnprintfz
+    // the buffer is \0 terminated by vsnprintfz
 }
 
 void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args)
 {
-	if(unlikely(!fmt || !*fmt)) return;
+    if(unlikely(!fmt || !*fmt)) return;
 
-	buffer_need_bytes(wb, 1);
+    buffer_need_bytes(wb, 2);
 
-	size_t len = wb->size - wb->len;
+    size_t len = wb->size - wb->len - 1;
 
-	wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
+    wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
 
-	buffer_overflow_check(wb);
+    buffer_overflow_check(wb);
 
-	// the buffer is \0 terminated by vsnprintfz
+    // the buffer is \0 terminated by vsnprintfz
 }
 
 void buffer_sprintf(BUFFER *wb, const char *fmt, ...)
 {
-	if(unlikely(!fmt || !*fmt)) return;
+    if(unlikely(!fmt || !*fmt)) return;
 
-	buffer_need_bytes(wb, 1);
+    buffer_need_bytes(wb, 2);
 
-	size_t len = wb->size - wb->len, wrote;
+    size_t len = wb->size - wb->len - 1;
+    size_t wrote;
 
-	va_list args;
-	va_start(args, fmt);
-	wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
-	va_end(args);
+    va_list args;
+    va_start(args, fmt);
+    wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
+    va_end(args);
 
-	if(unlikely(wrote >= len)) {
-		// there is bug in vsnprintf() and it returns
-		// a number higher to len, but it does not
-		// overflow the buffer.
-		// our buffer overflow detector will log it
-		// if it does.
-		buffer_overflow_check(wb);
+    if(unlikely(wrote >= len)) {
+        // truncated
+        buffer_overflow_check(wb);
 
-		debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %ld, size = %ld\n", wb->len, wb->size);
-		buffer_need_bytes(wb, len + WEB_DATA_LENGTH_INCREASE_STEP);
+        debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %zu, size = %zu\n", wb->len, wb->size);
+        buffer_need_bytes(wb, len + WEB_DATA_LENGTH_INCREASE_STEP);
 
-		va_start(args, fmt);
-		buffer_vsprintf(wb, fmt, args);
-		va_end(args);
-	}
-	else
-		wb->len += wrote;
+        va_start(args, fmt);
+        buffer_vsprintf(wb, fmt, args);
+        va_end(args);
+    }
+    else
+        wb->len += wrote;
 
-	// the buffer is \0 terminated by vsnprintf
+    // the buffer is \0 terminated by vsnprintf
 }
 
 
 void buffer_rrd_value(BUFFER *wb, calculated_number value)
 {
-	buffer_need_bytes(wb, 50);
-	wb->len += print_calculated_number(&wb->buffer[wb->len], 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';
+    // terminate it
+    buffer_need_bytes(wb, 1);
+    wb->buffer[wb->len] = '\0';
 
-	buffer_overflow_check(wb);
+    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)
+    // 01234567890123456789012345678901234
+    // Date(2014,04,01,03,28,20)
 
-	buffer_need_bytes(wb, 30);
+    buffer_need_bytes(wb, 30);
 
-	char *b = &wb->buffer[wb->len], *p;
+    char *b = &wb->buffer[wb->len], *p;
   unsigned int *q = (unsigned int *)b;  
 
   #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
@@ -232,23 +295,23 @@ void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minu
     *r++ = 0x2900;  // ")\0"
   #endif
 
-	wb->len += (size_t)((char *)r - b - 1);
+    wb->len += (size_t)((char *)r - b - 1);
 
-	// terminate it
-	wb->buffer[wb->len] = '\0';
-	buffer_overflow_check(wb);
+    // 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
+    //         10        20        30      = 35
+    // 01234567890123456789012345678901234
+    // 2014-04-01 03:28:20
 
-	buffer_need_bytes(wb, 36);
+    buffer_need_bytes(wb, 36);
 
-	char *b = &wb->buffer[wb->len];
+    char *b = &wb->buffer[wb->len];
   char *p = b;
 
   *p++ = '0' + year / 1000; year %= 1000;
@@ -272,68 +335,57 @@ void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minute
   *p++ = '0' + seconds % 10;
   *p = '\0';
 
-	wb->len += (size_t)(p - b);
+    wb->len += (size_t)(p - b);
 
-	// terminate it
-	wb->buffer[wb->len] = '\0';
-	buffer_overflow_check(wb);
+    // terminate it
+    wb->buffer[wb->len] = '\0';
+    buffer_overflow_check(wb);
 }
 
-BUFFER *buffer_create(long size)
+BUFFER *buffer_create(size_t size)
 {
-	BUFFER *b;
-
-	debug(D_WEB_BUFFER, "Creating new web buffer of size %d.", size);
-
-	b = calloc(1, sizeof(BUFFER));
-	if(!b) {
-		error("Cannot allocate a web_buffer.");
-		return NULL;
-	}
-
-	b->buffer = malloc(size + sizeof(BUFFER_OVERFLOW_EOF) + 2);
-	if(!b->buffer) {
-		error("Cannot allocate a buffer of size %u.", size + sizeof(BUFFER_OVERFLOW_EOF) + 2);
-		free(b);
-		return NULL;
-	}
-	b->buffer[0] = '\0';
-	b->size = size;
-	b->contenttype = CT_TEXT_PLAIN;
-	buffer_overflow_init(b);
-	buffer_overflow_check(b);
-
-	return(b);
+    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)
-{
-	buffer_overflow_check(b);
+void buffer_free(BUFFER *b) {
+    if(unlikely(!b)) return;
 
-	debug(D_WEB_BUFFER, "Freeing web buffer of size %d.", b->size);
+    buffer_overflow_check(b);
 
-	if(b->buffer) free(b->buffer);
-	free(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;
+    buffer_overflow_check(b);
 
-	if(left >= free_size_required) return;
+    size_t left = b->size - b->len;
 
-	size_t increase = free_size_required - left;
-	if(increase < WEB_DATA_LENGTH_INCREASE_STEP) increase = WEB_DATA_LENGTH_INCREASE_STEP;
+    if(left >= free_size_required) return;
 
-	debug(D_WEB_BUFFER, "Increasing data buffer from size %d to %d.", b->size, b->size + increase);
+    size_t increase = free_size_required - left;
+    if(increase < WEB_DATA_LENGTH_INCREASE_STEP) increase = WEB_DATA_LENGTH_INCREASE_STEP;
 
-	b->buffer = realloc(b->buffer, b->size + increase + sizeof(BUFFER_OVERFLOW_EOF) + 2);
-	if(!b->buffer) fatal("Failed to increase data buffer from size %d to %d.", b->size + sizeof(BUFFER_OVERFLOW_EOF) + 2, b->size + increase + sizeof(BUFFER_OVERFLOW_EOF) + 2);
+    debug(D_WEB_BUFFER, "Increasing data buffer from size %zu to %zu.", b->size, b->size + increase);
 
-	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);
+    buffer_overflow_init(b);
+    buffer_overflow_check(b);
 }