Adding upstream version 1.37.1.upstream/1.37.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 269 insertions, 0 deletions

diff --git a/libnetdata/inlined.h b/libnetdata/inlined.h
new file mode 100644
index 0000000..aa7f3c2
--- /dev/null
+++ b/libnetdata/inlined.h
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_INLINED_H
+#define NETDATA_INLINED_H 1
+
+#include "libnetdata.h"
+
+#ifdef KERNEL_32BIT
+typedef uint32_t kernel_uint_t;
+#define str2kernel_uint_t(string) str2uint32_t(string)
+#define KERNEL_UINT_FORMAT "%u"
+#else
+typedef uint64_t kernel_uint_t;
+#define str2kernel_uint_t(string) str2uint64_t(string)
+#define KERNEL_UINT_FORMAT "%" PRIu64
+#endif
+
+#define str2pid_t(string) str2uint32_t(string)
+
+
+// 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 str2i(const char *s) {
+    int n = 0;
+    char c, negative = (char)(*s == '-');
+    const char *e = s + 30; // max number of character to iterate
+
+    for(c = (char)((negative)?*(++s):*s); c >= '0' && c <= '9' && s < e ; 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 == '-');
+    const char *e = &s[30]; // max number of character to iterate
+
+    for(c = (negative)?*(++s):*s; c >= '0' && c <= '9' && s < e ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+
+    if(unlikely(negative))
+        return -n;
+
+    return n;
+}
+
+static inline uint32_t str2uint32_t(const char *s) {
+    uint32_t n = 0;
+    char c;
+    const char *e = &s[30]; // max number of character to iterate
+
+    for(c = *s; c >= '0' && c <= '9' && s < e ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+    return n;
+}
+
+static inline uint64_t str2uint64_t(const char *s) {
+    uint64_t n = 0;
+    char c;
+    const char *e = &s[30]; // max number of character to iterate
+
+    for(c = *s; c >= '0' && c <= '9' && s < e ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+    return n;
+}
+
+static inline unsigned long str2ul(const char *s) {
+    unsigned long n = 0;
+    char c;
+    const char *e = &s[30]; // max number of character to iterate
+
+    for(c = *s; c >= '0' && c <= '9' && s < e ; 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;
+    const char *e = &s[30]; // max number of character to iterate
+
+    for(c = *s; c >= '0' && c <= '9' && s < e ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+    return n;
+}
+
+static inline long long str2ll(const char *s, char **endptr) {
+    int negative = 0;
+
+    if(unlikely(*s == '-')) {
+        s++;
+        negative = 1;
+    }
+    else if(unlikely(*s == '+'))
+        s++;
+
+    long long n = 0;
+    char c;
+    const char *e = &s[30]; // max number of character to iterate
+
+    for(c = *s; c >= '0' && c <= '9' && s < e ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+
+    if(unlikely(endptr))
+        *endptr = (char *)s;
+
+    if(unlikely(negative))
+        return -n;
+    else
+        return n;
+}
+
+static inline char *strncpyz(char *dst, const char *src, size_t n) {
+    char *p = dst;
+
+    while (*src && n--)
+        *dst++ = *src++;
+
+    *dst = '\0';
+
+    return p;
+}
+
+static inline void sanitize_json_string(char *dst, const char *src, size_t dst_size) {
+    while (*src != '\0' && dst_size > 1) {
+        if (*src < 0x1F) {
+            *dst++ = '_';
+            src++;
+            dst_size--;
+        }
+        else if (*src == '\\' || *src == '\"') {
+            *dst++ = '\\';
+            *dst++ = *src++;
+            dst_size -= 2;
+        }
+        else {
+            *dst++ = *src++;
+            dst_size--;
+        }
+    }
+    *dst = '\0';
+}
+
+static inline bool sanitize_command_argument_string(char *dst, const char *src, size_t dst_size) {
+    // skip leading dashes
+    while (src[0] == '-')
+        src++;
+
+    // escape single quotes
+    while (src[0] != '\0') {
+        if (src[0] == '\'') {
+            if (dst_size < 4)
+                return false;
+
+            dst[0] = '\''; dst[1] = '\\'; dst[2] = '\''; dst[3] = '\'';
+
+            dst += 4;
+            dst_size -= 4;
+        } else {
+            if (dst_size < 1)
+                return false;
+
+            dst[0] = src[0];
+
+            dst += 1;
+            dst_size -= 1;
+        }
+
+        src++;
+    }
+
+    // make sure we have space to terminate the string
+    if (dst_size == 0)
+        return false;
+    *dst = '\0';
+
+    return true;
+}
+
+static inline int read_file(const char *filename, char *buffer, size_t size) {
+    if(unlikely(!size)) return 3;
+
+    int fd = open(filename, O_RDONLY, 0666);
+    if(unlikely(fd == -1)) {
+        buffer[0] = '\0';
+        return 1;
+    }
+
+    ssize_t r = read(fd, buffer, size);
+    if(unlikely(r == -1)) {
+        buffer[0] = '\0';
+        close(fd);
+        return 2;
+    }
+    buffer[r] = '\0';
+
+    close(fd);
+    return 0;
+}
+
+static inline int read_single_number_file(const char *filename, unsigned long long *result) {
+    char buffer[30 + 1];
+
+    int ret = read_file(filename, buffer, 30);
+    if(unlikely(ret)) {
+        *result = 0;
+        return ret;
+    }
+
+    buffer[30] = '\0';
+    *result = str2ull(buffer);
+    return 0;
+}
+
+static inline int read_single_signed_number_file(const char *filename, long long *result) {
+    char buffer[30 + 1];
+
+    int ret = read_file(filename, buffer, 30);
+    if(unlikely(ret)) {
+        *result = 0;
+        return ret;
+    }
+
+    buffer[30] = '\0';
+    *result = atoll(buffer);
+    return 0;
+}
+
+#endif //NETDATA_INLINED_H