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|
%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
license = bsd
%% header
/** @file
Double to wchar_t text conversion using the more secure
_snwprintf_s(), _snwprintf() or snwprintf() functions instead
of swprintf() if available.
CRT on Windows: Required.
*/
#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif
#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif
#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif
#if DK4_HAVE_WCHAR_H
#ifndef WCHAR_H_INCLUDED
#include <wchar.h>
#define WCHAR_H_INCLUDED 1
#endif
#endif
#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define STDLIB_H_INCLUDED 1
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Convert double value to string.
@param dptr Destination buffer pointer.
@param szdptr Size of destination buffer (number of wchar_t).
@param v Value to convert.
@param exact Flag: Write enough digits to allow exact restoration.
@param minimize Minimize exact respresentation.
@param erp Error report, may be NULL.
@return 1 on success, 0 on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if dptr is NULL or szdptr is less than 2,
- DK4_E_BUFFER_TOO_SMALL<br>
if the destination buffer is too small to store the string.
*/
int
dk4ma_write_wc_double(
wchar_t *dptr, size_t szdptr, double v, int exact, int minimize, dk4_er_t *erp
);
#ifdef __cplusplus
}
#endif
%% module
#include "dk4conf.h"
#include "dk4types.h"
#if DK4_HAVE_LOCALE_H
#ifndef LOCALE_H_INCLUDED
#include <locale.h>
#define LOCALE_H_INCLUDED 1
#endif
#endif
#include "dk4mem.h"
#include "dk4mao8dbl.h"
#include "dk4maowdbl.h"
#include "dk4str8.h"
#include "dk4strw.h"
/** Locale to user for conversion.
*/
static const char locale_kw[] = { "C" };
/** Convert double value to string.
@param dptr Destination buffer pointer.
@param szdptr Size of destination buffer (number of wchar_t).
@param v Value to convert.
@param exact Flag: Write enough digits to allow exact restoration.
@param minimize Minimize exact respresentation.
@param erp Error report, may be NULL.
@return 1 on success, 0 on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if dptr is NULL or szdptr is less than 2,
- DK4_E_BUFFER_TOO_SMALL<br>
if the destination buffer is too small to store the string.
*/
static
void
dk4double_squeeze_wc_string(wchar_t *buf)
{
wchar_t *ptre = NULL;
wchar_t *ptrdot = NULL;
wchar_t *ptrcom = NULL;
wchar_t *ptrcut = NULL;
wchar_t *ptr;
int useexp = 1;
$? "+ dk4double_squeeze_wc_string \"%!ws\"", TR_LSTR(buf)
if (NULL != buf) {
ptr = buf;
while(L'\0' != *ptr) {
if ((L'e' == *ptr) || (L'E' == *ptr)) {
if (NULL == ptre) { ptre = ptr; }
} else {
if (L'.' == *ptr) {
if (NULL == ptrdot) { ptrdot = ptr; }
} else {
if (L',' == *ptr) {
if (NULL == ptrcom) { ptrcom = ptr; }
}
}
}
ptr++;
}
if (NULL != ptre) { $? ". check exponent"
*ptre = '\0';
ptr = ptre;
ptr++;
if ((L'+' == *ptr) || (L'0' == *ptr)) { $? ". leading + or 0"
useexp = 0;
ptr++;
while(L'\0' != *ptr) {
if (L'0' != *ptr) { $? ". non-0 char \"%c\"", *ptr
useexp = 1;
}
ptr++;
}
}
}
if (NULL != ptrdot) {
ptrdot++;
if (L'\0' != *ptrdot) { $? ". chars after dot"
ptrdot++;
while(L'\0' != *ptrdot) { $? ". check \"%c\"", *ptrdot
if (L'0' == *ptrdot) {
if (NULL == ptrcut) {
ptrcut = ptrdot; $? ". cut"
}
} else {
ptrcut = NULL; $? ". no cut"
}
ptrdot++;
}
}
} else {
if (NULL != ptrcom) {
ptrcom++;
if (L'\0' != *ptrcom) {
ptrcom++;
while (L'\0' != *ptrcom) {
if (L'0' == *ptrcom) {
if (NULL == ptrcut) {
ptrcut = ptrcom;
}
} else {
ptrcut = NULL;
}
ptrcom++;
}
}
}
}
if ((NULL != ptre) && (0 != useexp)) {
*ptre = L'e';
}
if (NULL != ptrcut) {
if ((NULL != ptre) && (0 != useexp)) {
while (L'\0' != *ptre) {
*(ptrcut++) = *(ptre++);
}
}
*ptrcut = L'\0';
}
}
$? "- dk4double_squeeze_wc_string \"%!ws\"", TR_LSTR(buf)
}
static
int
dk4ma_internal_write_wc_double(
wchar_t *dptr, size_t szdptr, double v, int exact, int minimize, dk4_er_t *erp
)
{
#if DK4_HAVE__SNWPRINTF_S
/* +++ _snwprintf_s */
wchar_t buf[64];
int back = 0;
int res = 0;
if (NULL != dptr) { *dptr = L'\0'; }
if ((NULL != dptr) && (1 < szdptr)) {
if (0 != exact) {
res = _snwprintf_s(
buf, DK4_SIZEOF(buf,dkChar), _TRUNCATE, L"%.*e", (int)DK4_DBL_DIGITS, v
);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
if (0 != minimize) {
dk4double_squeeze_wc_string(buf);
}
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
} else {
res = _snwprintf_s(
buf, DK4_SIZEOF(buf,dkChar), _TRUNCATE, L"%g", v
);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
/* --- _snwprintf_s */
#else
#if DK4_HAVE__SNWPRINTF
/* +++ _snwprintf */
wchar_t buf[64];
int back = 0;
int res = 0;
if (NULL != dptr) { *dptr = L'\0'; }
if ((NULL != dptr) && (1 < szdptr)) {
if (0 != exact) {
0 = _snwprintf(
buf, DK4_SIZEOF(buf,dkChar), L"%.*e", (int)DK4_DBL_DIGITS, v
);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
if (0 != minimize) {
dk4double_squeeze_wc_string(buf);
}
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
} else {
0 = _snwprintf(
buf, DK4_SIZEOF(buf,dkChar), L"%g", v
);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
/* --- _snwprintf */
#else
#if DK4_HAVE_SNWPRINTF
wchar_t buf[64];
int back = 0;
int res = 0;
if (NULL != dptr) { *dptr = L'\0'; }
if ((NULL != dptr) && (1 < szdptr)) {
if (0 != exact) {
res = snwprintf(buf,DK4_SIZEOF(buf,dkChar),L"%.*e",(int)DK4_DBL_DIGITS,v);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
if (0 != minimize) {
dk4double_squeeze_wc_string(buf);
}
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
} else {
res = snwprintf(buf, DK4_SIZEOF(buf,dkChar), L"%g", v);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
#else
#if DK4_HAVE_SWPRINTF
/* +++ swprintf */
wchar_t buf[64];
int back = 0;
int res = 0;
if (NULL != dptr) { *dptr = L'\0'; }
if ((NULL != dptr) && (1 < szdptr)) {
if (0 != exact) {
res = swprintf(buf,DK4_SIZEOF(buf,dkChar),L"%.*e",(int)DK4_DBL_DIGITS,v);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
if (0 != minimize) {
dk4double_squeeze_wc_string(buf);
}
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
} else {
res = swprintf(buf, DK4_SIZEOF(buf,dkChar), L"%g", v);
if ((0 < res) && (res < DK4_SIZEOF(buf,dkChar))) {
buf[res] = L'\0';
back = dk4strw_cpy_s(dptr, szdptr, buf, erp);
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
/* --- swprintf */
#else
char buf[64];
char *p1;
wchar_t *p2;
int back = 0;
if ((NULL != dptr) && (1 < szdptr)) {
if (0 != dk4ma_write_c8_double(buf,sizeof(buf),v,exact,minimize,erp)) {
if (dk4str8_len(buf) < szdptr) {
p2 = dptr; p1 = buf;
while ('\0' != *p1) {
*(p2++) = (wchar_t)(*(p1++));
}
*p2 = L'\0';
back = 1;
} else {
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
#endif
#endif
#endif
#endif
}
int
dk4ma_write_wc_double(
wchar_t *dptr, size_t szdptr, double v, int exact, int minimize, dk4_er_t *erp
)
{
#if (DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC)
char *oldloc = NULL;
#endif
int back = 0;
#if (DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC)
oldloc = setlocale(LC_NUMERIC, NULL);
(void)setlocale(LC_NUMERIC, locale_kw);
#endif
back = dk4ma_internal_write_wc_double(dptr, szdptr, v, exact, minimize, erp);
#if (DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC)
(void)setlocale(LC_NUMERIC, oldloc);
#endif
return back;
}
|
