%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
license = bsd
%% header
/** @file
Simple conversion from wchar_t to char.
CRT on Windows: Not used.
*/
#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif
#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif
#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Recode string from wchar_t to ASCII (0x00 to 0x7F).
Use this function only for real ASCII source strings with characters
in range 0x00 to 0x7F (i.e. to convert numbers, dates, or
english text).
@param dstb Destination buffer.
@param szdstb Size of destination buffer.
@param src Source string to convert.
@param erp Error report, may be NULL.
@return 1 on success, 0 on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS
if dstb or src is NULL or szdstb is 0,
- DK4_E_BUFFER_TOO_SMALL
if the dstb buffer is too small,
- DK4_E_SYNTAX
if the source string contains an illegal character (above 0x7F).
*/
int
dk4recode_wchar_t_to_char(
char *dstb, size_t szdstb, const wchar_t *src, dk4_er_t *erp
);
#ifdef __cplusplus
}
#endif
%% module
#include "dk4rec24.h"
int
dk4recode_wchar_t_to_char(
char *dstb, size_t szdstb, const wchar_t *src, dk4_er_t *erp
)
{
size_t used = 0;
int back = 0;
if ((NULL != dstb) && (NULL != src) && (0 < szdstb)) {
back = 1;
while ((L'\0' != *src) && (1 == back)) {
if ((wchar_t)128 > *src) {
dstb[used++] = (char)(*(src++));
} else {
dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
back = 0;
}
}
if (used < szdstb) {
dstb[used] = '\0';
} else {
dstb[szdstb-1] = '\0';
dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
back = 0;
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}