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- #include <wctype.h>
- /* iswalnum */
- #include <locale.h>
- /* using setlocale */
- #include <stdlib.h>
- /* using mbtowc */
- int main(int argc, char** argv)
- {
- char* word;
- wchar_t character;
- int consumed;
- if(argc < 2)
- return 1;
- /* enable system locale */
- setlocale(LC_ALL,"");
- /* decode one character at a time */
- for(word = argv[1]; (consumed = mbtowc(&character, word, MB_CUR_MAX)) > 0;
- word += consumed) {
- if(! iswalnum(character))
- return 1;
- }
- /* mbtowc indicated encoding error */
- if(consumed < 0)
- return 1;
- return 0;
- }
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