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%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
SPDX-License-Identifier: BSD-3-Clause
%% header
/** @file
Preferences as key/value pairs; the module contains functions
to create and destroy a preference structure and to compare
preference structures by name or against a given name.
Typically preferences are stored in a dk4_sto_t structure.
CRT on Windows: Optional.
*/
#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif
#ifndef DK4TYPES_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4types.h"
#else
#include <dktools-4/dk4types.h>
#endif
#endif
#ifndef DK4ERROR_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4error.h"
#else
#include <dktools-4/dk4error.h>
#endif
#endif
#ifndef DK4STR8_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4str8.h"
#else
#include <dktools-4/dk4str8.h>
#endif
#endif
#ifndef DK4STRW_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4strw.h"
#else
#include <dktools-4/dk4strw.h>
#endif
#endif
#ifndef DK4STRD_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4strd.h"
#else
#include <dktools-4/dk4strd.h>
#endif
#endif
/** Preferences storage.
*/
typedef struct {
dkChar *name; /**< Preference name. */
dkChar *value; /**< Value. */
} dk4_pref_t;
#ifdef __cplusplus
extern "C" {
#endif
/** Create preferences structure, allocate memory.
@param name Preference name.
@param value Preference value.
@param erp Error report, may be NULL.
@return Pointer to new preferences object on success, NULL on error.
*/
dk4_pref_t *
dk4pref_open(dkChar const *name, dkChar const *value, dk4_er_t *erp);
/** Destroy preference structure, release memory.
@param ptr Preference structure to destroy.
*/
void
dk4pref_close(dk4_pref_t *ptr);
/** Comparison function.
@param l Left pointer.
@param r Right pointer.
@param cr Comparison criteria:
0=structure/structure,
1=structure/name.
@return Comparison result.
*/
int
dk4pref_compare(const void *l, const void *r, int cr);
#ifdef __cplusplus
}
#endif
%% module
#include "dk4conf.h"
#include "dk4pref.h"
#include "dk4mem.h"
#if DK4_HAVE_ASSERT_H
#ifndef ASSERT_H_INCLUDED
#include <assert.h>
#define ASSERT_H_INCLUDED 1
#endif
#endif
$!trace-include
dk4_pref_t *
dk4pref_open(dkChar const *name, dkChar const *value, dk4_er_t *erp)
{
dk4_pref_t *back = NULL;
$? "+ dk4pref_open \"%!ds\"=\"%!ds\"", TR_DKSTR(name), TR_DKSTR(value)
#if DK4_USE_ASSERT
assert(NULL != name);
assert(NULL != value);
#endif
if ((NULL != name) && (NULL != value)) {
back = dk4mem_new(dk4_pref_t,1,erp);
if (NULL != back) {
back->name = NULL;
back->value = NULL;
back->name = dk4str_dup(name, erp);
back->value = dk4str_dup(value, erp);
if ((NULL == back->name) || (NULL == back->value)) {
dk4pref_close(back);
back = NULL;
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
} $? "- dk4pref_open PTR=%d", TR_IPTR(back)
return back;
}
void
dk4pref_close(dk4_pref_t *ptr)
{
$? "+ dk4pref_close"
#if DK4_USE_ASSERT
assert(NULL != ptr);
#endif
if (NULL != ptr) {
$? ". \"%!ds\"=\"%!ds\"", TR_DKSTR(ptr->name), TR_DKSTR(ptr->value)
#if 0
/* Original stuff.
*/
dk4mem_release(ptr->name);
dk4mem_release(ptr->value);
#endif
/* 2016-12-10 Sanitize memory before releasing it.
*/
dk4str_release_sanitized(ptr->name);
dk4str_release_sanitized(ptr->value);
dk4mem_free(ptr);
}
$? "- dk4pref_close"
}
int
dk4pref_compare(const void *l, const void *r, int cr)
{
const dk4_pref_t *pl;
const dk4_pref_t *pr;
int back = 0;
$? "+ dk4pref_compare"
if (NULL != l) {
if (NULL != r) {
pl = (const dk4_pref_t *)l;
switch (cr) {
case 1: {
if (NULL != pl->name) {
back = dk4str_cmp(pl->name, (const dkChar *)r);
} else {
back = -1;
}
} break;
default: {
pr = (const dk4_pref_t *)r;
if (NULL != pl->name) {
if (NULL != pr->name) {
back = dk4str_cmp(pl->name, pr->name);
} else {
back = 1;
}
} else {
if (NULL != pr->name) {
back = -1;
}
}
} break;
}
} else {
back = 1;
}
} else {
if (NULL != r) {
back = -1;
}
} $? "- dk4pref_compare %d", back
return back;
}
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