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authorLennart Weller <lhw@ring0.de>2017-01-24 15:21:09 +0000
committerLennart Weller <lhw@ring0.de>2017-01-24 15:21:09 +0000
commit3ed3b02ed96ddab1c084811f3579b3a2aec83e04 (patch)
tree7a61ab288ae47800c4f11be5677d6ad8288dcd98 /src/inlined.h
parentNew upstream version 1.4.0+dfsg (diff)
downloadnetdata-3ed3b02ed96ddab1c084811f3579b3a2aec83e04.tar.xz
netdata-3ed3b02ed96ddab1c084811f3579b3a2aec83e04.zip
New upstream version 1.5.0+dfsgupstream/1.5.0+dfsg
Diffstat (limited to '')
-rw-r--r--src/inlined.h127
1 files changed, 127 insertions, 0 deletions
diff --git a/src/inlined.h b/src/inlined.h
new file mode 100644
index 000000000..e776f830e
--- /dev/null
+++ b/src/inlined.h
@@ -0,0 +1,127 @@
+#ifndef NETDATA_INLINED_H
+#define NETDATA_INLINED_H
+
+#include "common.h"
+
+// for faster execution, allow the compiler to inline
+// these functions that are called thousands of times per second
+
+static inline uint32_t simple_hash(const char *name) {
+ unsigned char *s = (unsigned char *) name;
+ uint32_t hval = 0x811c9dc5;
+ while (*s) {
+ hval *= 16777619;
+ hval ^= (uint32_t) *s++;
+ }
+ return hval;
+}
+
+static inline uint32_t simple_uhash(const char *name) {
+ unsigned char *s = (unsigned char *) name;
+ uint32_t hval = 0x811c9dc5, c;
+ while ((c = *s++)) {
+ if (unlikely(c >= 'A' && c <= 'Z')) c += 'a' - 'A';
+ hval *= 16777619;
+ hval ^= c;
+ }
+ return hval;
+}
+
+static inline int simple_hash_strcmp(const char *name, const char *b, uint32_t *hash) {
+ unsigned char *s = (unsigned char *) name;
+ uint32_t hval = 0x811c9dc5;
+ int ret = 0;
+ while (*s) {
+ if(!ret) ret = *s - *b++;
+ hval *= 16777619;
+ hval ^= (uint32_t) *s++;
+ }
+ *hash = hval;
+ return ret;
+}
+
+static inline int str2i(const char *s) {
+ int n = 0;
+ char c, negative = (*s == '-');
+
+ for(c = (negative)?*(++s):*s; c >= '0' && c <= '9' ; c = *(++s)) {
+ n *= 10;
+ n += c - '0';
+ }
+
+ if(unlikely(negative))
+ return -n;
+
+ return n;
+}
+
+static inline long str2l(const char *s) {
+ long n = 0;
+ char c, negative = (*s == '-');
+
+ for(c = (negative)?*(++s):*s; c >= '0' && c <= '9' ; c = *(++s)) {
+ n *= 10;
+ n += c - '0';
+ }
+
+ if(unlikely(negative))
+ return -n;
+
+ return n;
+}
+
+static inline unsigned long str2ul(const char *s) {
+ unsigned long n = 0;
+ char c;
+ for(c = *s; c >= '0' && c <= '9' ; c = *(++s)) {
+ n *= 10;
+ n += c - '0';
+ }
+ return n;
+}
+
+static inline unsigned long long str2ull(const char *s) {
+ unsigned long long n = 0;
+ char c;
+ for(c = *s; c >= '0' && c <= '9' ; c = *(++s)) {
+ n *= 10;
+ n += c - '0';
+ }
+ return n;
+}
+
+#ifdef NETDATA_STRCMP_OVERRIDE
+#ifdef strcmp
+#undef strcmp
+#endif
+#define strcmp(a, b) strsame(a, b)
+static inline int strsame(const char *a, const char *b) {
+ if(unlikely(a == b)) return 0;
+ while(*a && *a == *b) { a++; b++; }
+ return *a - *b;
+}
+#endif // NETDATA_STRSAME
+
+static inline int read_single_number_file(const char *filename, unsigned long long *result) {
+ char buffer[30 + 1];
+
+ int fd = open(filename, O_RDONLY, 0666);
+ if(unlikely(fd == -1)) {
+ *result = 0;
+ return 1;
+ }
+
+ ssize_t r = read(fd, buffer, 30);
+ if(unlikely(r == -1)) {
+ *result = 0;
+ close(fd);
+ return 2;
+ }
+
+ close(fd);
+ buffer[30] = '\0';
+ *result = str2ull(buffer);
+ return 0;
+}
+
+#endif //NETDATA_INLINED_H