amxp_expression_var.c File Reference

#include <sys/resource.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <regex.h>
#include <amxc/amxc.h>
#include <amxc/amxc_macros.h>
#include "amxp_expr_priv.h"

Go to the source code of this file.

Data Structures
struct	_var_collector

Macros
#define	_GNU_SOURCE

Typedefs
typedef struct _var_collector	var_collector_t

Functions
static void	var_collector_it_free (amxc_llist_it_t *it)
static var_collector_t *	var_collector_new (const char *path, const amxc_var_t *var, amxc_llist_t *vars)
static void	var_path_add (amxc_string_t *path, const char *name, uint32_t index)
static void	var_update_entry (var_collector_t *c, const char *token)
static void	var_add_filtered_entry (amxc_var_t *item, const char *base_path, const char *token, amxp_expr_t *expr, amxc_llist_t *new_entries, const char *name, uint32_t index)
static void	var_update_filtered_list (var_collector_t *current, amxc_llist_t *new_entries, const char *token)
static void	var_update_filtered_table (var_collector_t *current, amxc_llist_t *new_entries, const char *token)
static void	var_update_filtered (var_collector_t *current, amxc_llist_t *new_entries, const char *token)
static void	var_update_collection (amxc_llist_t *vars, amxc_string_t *part)
static void	var_collect (amxc_llist_t *vars, amxc_llist_t *parts)
static int	var_build_parts (amxc_llist_t *parts, const char *path)
bool	amxp_expr_eval_var (amxp_expr_t *expr, const amxc_var_t *const data, amxp_expr_status_t *status)
	Evaluates an expression against a composite variant. More...
amxp_expr_status_t	amxp_expr_get_field_var (UNUSED amxp_expr_t *expr, amxc_var_t *value, const char *path, void *priv)
int	amxp_expr_find_var_paths (const amxc_var_t *const var, amxc_llist_t *paths, const char *path)
	Search matching variant paths in a composite variant. More...
int	amxp_expr_find_var_values (const amxc_var_t *const var, amxc_htable_t *values, const char *path)
	Search matching variant paths in a composite variant. More...
amxc_var_t *	amxp_expr_find_var (const amxc_var_t *const var, const char *path)
	Search a matching variant and returns a pointer to that variant. More...

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE

Definition at line 56 of file amxp_expression_var.c.

Typedef Documentation

var_collector_t

typedef struct _var_collector var_collector_t

Function Documentation

amxp_expr_get_field_var()

amxp_expr_status_t amxp_expr_get_field_var	(	UNUSED amxp_expr_t *	expr,
		amxc_var_t *	value,
		const char *	path,
		void *	priv
	)

Definition at line 328 of file amxp_expression_var.c.

                                                       {
    amxp_expr_status_t status = amxp_expr_status_unknown_error;
    amxc_var_t* data = (amxc_var_t*) priv;
    amxc_var_t* field = NULL;
 
    if(path && (path[0] == '.')) {
        field = amxc_var_get_path(data, path + 1, AMXC_VAR_FLAG_DEFAULT);
    } else {
        field = amxc_var_get_path(data, path, AMXC_VAR_FLAG_DEFAULT);
    }
    if(amxc_var_copy(value, field) == 0) {
        status = amxp_expr_status_ok;
    }
 
    return status;
}

var_add_filtered_entry()

static void var_add_filtered_entry ( amxc_var_t *  item, const char *  base_path, const char *  token, amxp_expr_t *  expr, amxc_llist_t *  new_entries, const char *  name, uint32_t  index  )

static

Definition at line 133 of file amxp_expression_var.c.

                                                   {
    var_collector_t* nc = NULL;
 
    if(token[0] == '*') {
        nc = var_collector_new(base_path, item, new_entries);
        var_path_add(nc->path, name, index);
    } else {
        if(amxp_expr_eval_var(expr, item, NULL)) {
            nc = var_collector_new(base_path, item, new_entries);
            var_path_add(nc->path, name, index);
        }
    }
}

var_build_parts()

static int var_build_parts ( amxc_llist_t *  parts, const char *  path  )

static

Definition at line 292 of file amxp_expression_var.c.

                                                                  {
    int retval = 0;
    amxc_string_t search_path;
    amxc_string_init(&search_path, 0);
 
    amxc_string_set(&search_path, path);
    amxc_string_trim(&search_path, NULL);
 
    retval = amxc_string_split_to_llist(&search_path, parts, '.');
    when_failed(retval, exit);
    if((search_path.buffer != NULL) && (search_path.buffer[0] == '[')) {
        amxc_string_t* fp = amxc_string_from_llist_it(amxc_llist_get_first(parts));
        if((fp != NULL) && (fp->buffer != NULL) && (fp->buffer[0] != '[')) {
            amxc_string_prepend(fp, "[", 1);
            amxc_string_append(fp, "]", 1);
        }
    }
 
exit:
    amxc_string_clean(&search_path);
    return retval;
}

var_collect()

static void var_collect ( amxc_llist_t *  vars, amxc_llist_t *  parts  )

static

Definition at line 284 of file amxp_expression_var.c.

                                                                 {
    amxc_llist_for_each(it, parts) {
        amxc_string_t* part = amxc_container_of(it, amxc_string_t, it);
        var_update_collection(vars, part);
        amxc_string_delete(&part);
    }
}

var_collector_it_free()

static void var_collector_it_free ( amxc_llist_it_t *  it )

static

Definition at line 78 of file amxp_expression_var.c.

                                                       {
    var_collector_t* c = amxc_container_of(it, var_collector_t, it);
    amxc_string_delete(&c->path);
    free(c);
}

var_collector_new()

static var_collector_t* var_collector_new ( const char *  path, const amxc_var_t *  var, amxc_llist_t *  vars  )

static

Definition at line 84 of file amxp_expression_var.c.

                                                              {
    var_collector_t* c = (var_collector_t*) calloc(1, sizeof(var_collector_t));
    when_null(c, exit);
    amxc_string_new(&c->path, 0);
    amxc_string_setf(c->path, "%s", path);
    c->var = var;
 
    amxc_llist_append(vars, &c->it);
 
exit:
    return c;
}

var_path_add()

static void var_path_add ( amxc_string_t *  path, const char *  name, uint32_t  index  )

static

Definition at line 99 of file amxp_expression_var.c.

                                                                                {
    const char* sep = amxc_string_is_empty(path) ? "" : ".";
    if(name != NULL) {
        amxc_string_appendf(path, "%s'%s'", sep, name);
    } else {
        amxc_string_appendf(path, "%s%d", sep, index);
    }
}

var_update_collection()

static void var_update_collection ( amxc_llist_t *  vars, amxc_string_t *  part  )

static

Definition at line 253 of file amxp_expression_var.c.

                                                                           {
    size_t len = amxc_string_text_length(part);
    uint32_t offset = 0;
    char* token = amxc_string_take_buffer(part);
    amxc_llist_t new_entries;
    amxc_llist_init(&new_entries);
 
    if((token[0] == '\'') || (token[0] == '"') || (token[0] == '[')) {
        token[len - 1] = 0;
        offset = 1;
    }
 
    amxc_llist_for_each(it1, vars) {
        var_collector_t* c = amxc_container_of(it1, var_collector_t, it);
 
        if((token[0] == '*') || (token[0] == '[')) {
            var_update_filtered(c, &new_entries, token);
        } else {
            var_update_entry(c, token + offset);
        }
 
        c = NULL;
    }
 
    amxc_llist_for_each(it2, &new_entries) {
        amxc_llist_append(vars, it2);
    }
 
    free(token);
}

var_update_entry()

static void var_update_entry ( var_collector_t *  c, const char *  token  )

static

Definition at line 108 of file amxp_expression_var.c.

                                                                    {
    int index = 0;
    bool isindex = false;
    char* endptr = NULL;
    amxc_var_t* temp = NULL;
 
    index = strtol(token, &endptr, 0);
    if(*endptr == 0) {
        temp = amxc_var_get_index(c->var, index, AMXC_VAR_FLAG_DEFAULT);
    }
    if(temp == NULL) {
        temp = amxc_var_get_key(c->var, token, AMXC_VAR_FLAG_DEFAULT);
    } else {
        isindex = true;
    }
 
    if(temp != NULL) {
        c->var = temp;
        var_path_add(c->path, isindex ? NULL : token, index);
    } else {
        amxc_llist_it_take(&c->it);
        var_collector_it_free(&c->it);
    }
}

var_update_filtered()

static void var_update_filtered ( var_collector_t *  current, amxc_llist_t *  new_entries, const char *  token  )

static

Definition at line 232 of file amxp_expression_var.c.

                                                   {
 
    if((amxc_var_type_of(current->var) != AMXC_VAR_ID_HTABLE) &&
       ( amxc_var_type_of(current->var) != AMXC_VAR_ID_LIST)) {
        amxc_llist_it_take(&current->it);
        var_collector_it_free(&current->it);
        goto exit;
    }
 
    if(amxc_var_type_of(current->var) == AMXC_VAR_ID_LIST) {
        var_update_filtered_list(current, new_entries, token);
    } else {
        var_update_filtered_table(current, new_entries, token);
    }
 
exit:
    return;
}

var_update_filtered_list()

static void var_update_filtered_list ( var_collector_t *  current, amxc_llist_t *  new_entries, const char *  token  )

static

Definition at line 153 of file amxp_expression_var.c.

                                                        {
    const amxc_llist_t* items = amxc_var_constcast(amxc_llist_t, current->var);
    const char* base = amxc_string_get(current->path, 0);
    uint32_t index = 0;
    amxp_expr_t expr;
 
    if(token[0] == '[') {
        amxp_expr_init(&expr, token + 1);
    }
    amxc_llist_iterate(it, items) {
        amxc_var_t* item = amxc_var_from_llist_it(it);
        if(index != 0) {
            var_add_filtered_entry(item, base, token, &expr, new_entries, NULL, index);
        }
        index++;
    }
 
    if(token[0] == '*') {
        var_path_add(current->path, NULL, 0);
        current->var = amxc_var_get_index(current->var, 0, AMXC_VAR_FLAG_DEFAULT);
    } else {
        amxc_var_t* item = amxc_var_get_index(current->var, 0, AMXC_VAR_FLAG_DEFAULT);
        if(!amxp_expr_eval_var(&expr, item, NULL)) {
            amxc_llist_it_take(&current->it);
            var_collector_it_free(&current->it);
        } else {
            var_path_add(current->path, NULL, 0);
            current->var = item;
        }
    }
 
    if(token[0] == '[') {
        amxp_expr_clean(&expr);
    }
}

var_update_filtered_table()

static void var_update_filtered_table ( var_collector_t *  current, amxc_llist_t *  new_entries, const char *  token  )

static

Definition at line 191 of file amxp_expression_var.c.

                                                         {
    const amxc_htable_t* items = amxc_var_constcast(amxc_htable_t, current->var);
    const char* first = NULL;
    const char* base = amxc_string_get(current->path, 0);
    amxp_expr_t expr;
 
    if(token[0] == '[') {
        amxp_expr_init(&expr, token + 1);
    }
 
    amxc_htable_iterate(it, items) {
        const char* name = amxc_htable_it_get_key(it);
        amxc_var_t* item = amxc_var_from_htable_it(it);
        if(first != NULL) {
            var_add_filtered_entry(item, base, token, &expr, new_entries, name, 0);
        } else {
            first = name;
        }
    }
 
    if(token[0] == '*') {
        var_path_add(current->path, first, 0);
        current->var = amxc_var_get_key(current->var, first, AMXC_VAR_FLAG_DEFAULT);
    } else {
        amxc_var_t* item = amxc_var_get_key(current->var, first, AMXC_VAR_FLAG_DEFAULT);
        if(!amxp_expr_eval_var(&expr, item, NULL)) {
            amxc_llist_it_take(&current->it);
            var_collector_it_free(&current->it);
        } else {
            var_path_add(current->path, first, 0);
            current->var = item;
        }
    }
 
    if(token[0] == '[') {
        amxp_expr_clean(&expr);
    }
}