modularize C source code (#4372)

* modularize cgroups and cmake; #4339

* modularized freeipmi.plugin

* added comment about referencing parent files

* modularized apps.plugin

* modularized proc and diskspace

* minor fixes

* modularized plugins: checks, freebsd, idlejitter, nfacct, tc, macos, plugins.d

* minor fixes 2

* modularized statsd

* modularized cgroup-network

* moved cgroup-network-helper.sh and cgroup-name.sh to cgroup.plugin

* modularized health plugin

* move rrd related info to rrd.h

* added libnetdata

* do not corrupt config.h

* use dir-objects instead of static libraries

* fixed cmake for new structure

* use absolute paths to fix LGTM

* enable automake subdir-objects and prettify its output

* use relative files at the src directory for all plugins

* fix compiler warning

* synced automake and cmake

* added config.h to cmake

* abstracted basic os functions in libnetdata/os

* fix zfs_common

* removed apps.plugin dependency on freebsd plugin

* health removed from plugins

* modularized the registry

* modularized the rest of it

* include streaming files in cmake

* use libnetdata as library

* enable silent-rules only when they are available

1 files changed, 0 insertions, 74 deletions

diff --git a/src/eval.h b/src/eval.h
deleted file mode 100644
index a2c8a78630..0000000000
--- a/src/eval.h
+++ /dev/null
@@ -1,74 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#ifndef NETDATA_EVAL_H
-#define NETDATA_EVAL_H 1
-
-#define EVAL_MAX_VARIABLE_NAME_LENGTH 300
-
-typedef struct eval_variable {
-    char *name;
-    uint32_t hash;
-    struct eval_variable *next;
-} EVAL_VARIABLE;
-
-typedef struct eval_expression {
-    const char *source;
-    const char *parsed_as;
-
-    RRDCALC_STATUS *status;
-    calculated_number *this;
-    time_t *after;
-    time_t *before;
-
-    calculated_number result;
-
-    int error;
-    BUFFER *error_msg;
-
-    // hidden EVAL_NODE *
-    void *nodes;
-
-    // custom data to be used for looking up variables
-    struct rrdcalc *rrdcalc;
-} EVAL_EXPRESSION;
-
-#define EVAL_VALUE_INVALID    0
-#define EVAL_VALUE_NUMBER     1
-#define EVAL_VALUE_VARIABLE   2
-#define EVAL_VALUE_EXPRESSION 3
-
-// parsing and evaluation
-#define EVAL_ERROR_OK                             0
-
-// parsing errors
-#define EVAL_ERROR_MISSING_CLOSE_SUBEXPRESSION    1
-#define EVAL_ERROR_UNKNOWN_OPERAND                2
-#define EVAL_ERROR_MISSING_OPERAND                3
-#define EVAL_ERROR_MISSING_OPERATOR               4
-#define EVAL_ERROR_REMAINING_GARBAGE              5
-#define EVAL_ERROR_IF_THEN_ELSE_MISSING_ELSE      6
-
-// evaluation errors
-#define EVAL_ERROR_INVALID_VALUE                101
-#define EVAL_ERROR_INVALID_NUMBER_OF_OPERANDS   102
-#define EVAL_ERROR_VALUE_IS_NAN                 103
-#define EVAL_ERROR_VALUE_IS_INFINITE            104
-#define EVAL_ERROR_UNKNOWN_VARIABLE             105
-
-// parse the given string as an expression and return:
-//   a pointer to an expression if it parsed OK
-//   NULL in which case the pointer to error has the error code
-extern EVAL_EXPRESSION *expression_parse(const char *string, const char **failed_at, int *error);
-
-// free all resources allocated for an expression
-extern void expression_free(EVAL_EXPRESSION *expression);
-
-// convert an error code to a message
-extern const char *expression_strerror(int error);
-
-// evaluate an expression and return
-// 1 = OK, the result is in: expression->result
-// 2 = FAILED, the error message is in: buffer_tostring(expression->error_msg)
-extern int expression_evaluate(EVAL_EXPRESSION *expression);
-
-#endif //NETDATA_EVAL_H