Annotated edit history of
ungetwc(3) version 1 showing authors affecting page license.
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perry |
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UNGETWC |
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!!!UNGETWC |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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RETURN VALUE |
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CONFORMING TO |
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SEE ALSO |
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NOTES |
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---- |
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!!NAME |
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ungetwc - push back a wide character onto a FILE stream |
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!!SYNOPSIS |
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__#include |
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__ ''wc''__, FILE *__''stream''__); |
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__ |
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!!DESCRIPTION |
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The __ungetwc__ function is the wide-character equivalent |
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of the __ungetc__ function. It pushes back a wide |
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character onto ''stream'' and returns it. |
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If ''wc'' is WEOF, it returns WEOF. If ''wc'' is an |
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invalid wide character, it sets __errno__ to |
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__EILSEQ__ and returns WEOF. |
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If ''wc'' is a valid wide character, it is pushed back |
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onto the stream and thus becomes available for future wide |
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character read operations. The file-position indicator is |
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decremented by one or more. The end-of-file indicator is |
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cleared. The backing storage of the file is not |
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affected. |
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Note: ''wc'' need not be the last wide character read |
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from the stream; it can be any other valid wide |
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character. |
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If the implementation supports multiple push-back operations |
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in a row, the pushed-back wide characters will be read in |
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reverse order; however, only one level of push-back is |
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guaranteed. |
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!!RETURN VALUE |
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The __ungetwc__ function returns ''wc'' when |
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successful, or WEOF upon failure. |
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!!CONFORMING TO |
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ISO/ANSI C, UNIX98 |
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!!SEE ALSO |
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fgetwc(3) |
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!!NOTES |
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The behaviour of __ungetwc__ depends on the LC_CTYPE |
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category of the current locale. |
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---- |
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