%% 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; }