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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/dktools/dk4maowdbl.ctr
Initial commit
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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;
+}
+