New upstream version 1.5.0+dfsgupstream/1.5.0+dfsg

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