modularized all source code (#4391)

* modularized all external plugins

* added README.md in plugins

* fixed title

* fixed typo

* relative link to external plugins

* external plugins configuration README

* added plugins link

* remove plugins link

* plugin names are links

* added links to external plugins

* removed unecessary spacing

* list to table

* added language

* fixed typo

* list to table on internal plugins

* added more documentation to internal plugins

* moved python, node, and bash code and configs into the external plugins

* added statsd README

* fix bug with corrupting config.h every 2nd compilation

* moved all config files together with their code

* more documentation

* diskspace info

* fixed broken links in apps.plugin

* added backends docs

* updated plugins readme

* move nc-backend.sh to backends

* created daemon directory

* moved all code outside src/

* fixed readme identation

* renamed plugins.d.plugin to plugins.d

* updated readme

* removed linux- from linux plugins

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* fixed README.md links

* fixed netdata tree links

* updated codacy, codeclimate and lgtm excluded paths

* update CMakeLists.txt

* updated automake options at top directory

* libnetdata slit into directories

* updated READMEs

* updated READMEs

* updated ARL docs

* updated ARL docs

* moved /plugins to /collectors

* moved all external plugins outside plugins.d

* updated codacy, codeclimate, lgtm

* updated README

* updated url

* updated readme

* updated readme

* updated readme

* updated readme

* moved api and web into webserver

* web/api web/gui web/server

* modularized webserver

* removed web/gui/version.txt

1 files changed, 298 insertions, 0 deletions

diff --git a/libnetdata/inlined.h b/libnetdata/inlined.h
new file mode 100644
index 0000000000..6a5994c12a
--- /dev/null
+++ b/libnetdata/inlined.h
@@ -0,0 +1,298 @@
+// 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 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 uint32_t str2uint32_t(const char *s) {
+    uint32_t n = 0;
+    char c;
+    for(c = *s; c >= '0' && c <= '9' ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+    return n;
+}
+
+static inline uint64_t str2uint64_t(const char *s) {
+    uint64_t n = 0;
+    char c;
+    for(c = *s; c >= '0' && c <= '9' ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+    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;
+}
+
+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;
+    for(c = *s; c >= '0' && c <= '9' ; c = *(++s)) {
+        n *= 10;
+        n += c - '0';
+    }
+
+    if(unlikely(endptr))
+        *endptr = (char *)s;
+
+    if(unlikely(negative))
+        return -n;
+    else
+        return n;
+}
+
+static inline long double str2ld(const char *s, char **endptr) {
+    int negative = 0;
+    const char *start = s;
+    unsigned long long integer_part = 0;
+    unsigned long decimal_part = 0;
+    size_t decimal_digits = 0;
+
+    switch(*s) {
+        case '-':
+            s++;
+            negative = 1;
+            break;
+
+        case '+':
+            s++;
+            break;
+
+        case 'n':
+            if(s[1] == 'a' && s[2] == 'n') {
+                if(endptr) *endptr = (char *)&s[3];
+                return NAN;
+            }
+            break;
+
+        case 'i':
+            if(s[1] == 'n' && s[2] == 'f') {
+                if(endptr) *endptr = (char *)&s[3];
+                return INFINITY;
+            }
+            break;
+
+        default:
+            break;
+    }
+
+    while (*s >= '0' && *s <= '9') {
+        integer_part = (integer_part * 10) + (*s - '0');
+        s++;
+    }
+
+    if(unlikely(*s == '.')) {
+        decimal_part = 0;
+        s++;
+
+        while (*s >= '0' && *s <= '9') {
+            decimal_part = (decimal_part * 10) + (*s - '0');
+            s++;
+            decimal_digits++;
+        }
+    }
+
+    if(unlikely(*s == 'e' || *s == 'E'))
+        return strtold(start, endptr);
+
+    if(unlikely(endptr))
+        *endptr = (char *)s;
+
+    if(unlikely(negative)) {
+        if(unlikely(decimal_digits))
+            return -((long double)integer_part + (long double)decimal_part / powl(10.0, decimal_digits));
+        else
+            return -((long double)integer_part);
+    }
+    else {
+        if(unlikely(decimal_digits))
+            return (long double)integer_part + (long double)decimal_part / powl(10.0, decimal_digits);
+        else
+            return (long double)integer_part;
+    }
+}
+
+#ifdef NETDATA_STRCMP_OVERRIDE
+#ifdef strcmp
+#undef strcmp
+#endif
+#define strcmp(a, b) strsame(a, b)
+#endif // NETDATA_STRCMP_OVERRIDE
+
+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;
+}
+
+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 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