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239c2bf93e
* libc/misc/unctrl.c: Replace FUNCTION description.
* libc/signal/signal.c: Remove documentation for raise and _raise_r.
* libc/stdio/getdelim.c: Fix spelling errors.
* libc/stdio/getw.c: Put RETURNS on a separate line. Fix punctuation.
* libc/stdio/putw.c: Likewise.
* libc/stdlib/a64l.c: Fix formatting, spelling and punctuation in
documentation.
* libc/stdlib/assert.c: Do not capitalize FUNCTION description.
* libc/stdlib/efgcvt.c: Add spaces to FUNCTION description.
* libc/stdlib/envlock.c: Use em-dash in FUNCTION description.
* libc/stdlib/mlock.c: Likewise.
* libc/stdlib/mstats.c: Likewise.
* libc/time/tzlock.c: Likewise.
* libc/stdlib/rand.c: Use "multi-threaded" and "thread-safe" in NOTES.
* libc/stdlib/rand48.c: Remove extra space in FUNCTION description
and hyphenate "pseudo-random".
* libc/string/bcmp.c: Remove extra blank lines in documentation.
* libc/string/strncat.c: Likewise.
* libc/string/memchr.c: Remove extra ">" character in documentation.
* libc/string/strcspn.c: Use "characters" instead of "chars".
* libc/string/strpbrk.c: Likewise.
* libc/string/strerror_r.c: Capitalize "GNU".
* libc/string/strnlen.c: Likewise.
* libc/string/strtok.c: Fix formatting, spelling and punctuation in
documentation. Use "multi-threaded" and "thread-safe" in NOTES.
* libc/string/wcscat.c: Split PORTABILITY into two paragraphs.
* libc/string/wcschr.c: Likewise.
* libc/string/wcscmp.c: Likewise.
* libc/string/wcscpy.c: Likewise.
* libc/string/wcscspn.c: Likewise.
* libc/string/wcslen.c: Likewise.
* libc/string/wcsncat.c: Likewise.
* libc/string/wcsncmp.c: Likewise.
* libc/string/wcsncpy.c: Likewise.
* libc/string/wcsnlen.c: Likewise.
* libc/string/wcspbrk.c: Likewise.
* libc/string/wcsrchr.c: Likewise.
* libc/string/wcsspn.c: Likewise.
* libc/string/wmemchr.c: Likewise.
* libc/string/wmemcmp.c: Likewise.
* libc/string/wmemcpy.c: Likewise.
* libc/string/wmemset.c: Likewise.
* libc/string/wmemmove.c: Likewise. Also fix FUNCTION description.
* libc/string/wcswidth.c: Formatting and punctuation in documentation.
* libc/string/wcwidth.c: Likewise.
* libm/common/s_modf.c: Remove extra period from documentation.
* libm/math/s_isnan.c: Fix formatting, grammar and punctuation in
documentation.
* libm/mathfp/s_isnan.c: Likewise.
* libm/math/s_ldexp.c: Fix punctuation.
* libm/mathfp/s_ldexp.c: Likewise.
* libm/math/w_log.c: Likewise.
* libm/mathfp/s_logarithm.c: Likewise.
* libm/math/w_j0.c: Add spaces to FUNCTION description.
* libm/mathfp/w_jn.c: Likewise.
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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FUNCTION
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<<wcswidth>>---number of column positions of a wide-character string
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INDEX
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wcswidth
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ANSI_SYNOPSIS
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#include <wchar.h>
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int wcswidth(const wchar_t *<[pwcs]>, size_t <[n]>);
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TRAD_SYNOPSIS
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#include <wchar.h>
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int wcswidth(<[pwcs]>, <[n]>)
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wchar_t *<[wc]>;
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size_t <[n]>;
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DESCRIPTION
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The <<wcswidth>> function shall determine the number of column
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positions required for <[n]> wide-character codes (or fewer than <[n]>
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wide-character codes if a null wide-character code is encountered
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before <[n]> wide-character codes are exhausted) in the string pointed
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to by <[pwcs]>.
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RETURNS
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The <<wcswidth>> function either shall return 0 (if <[pwcs]> points to a
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null wide-character code), or return the number of column positions
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to be occupied by the wide-character string pointed to by <[pwcs]>, or
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return -1 (if any of the first <[n]> wide-character codes in the
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wide-character string pointed to by <[pwcs]> is not a printable
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wide-character code).
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PORTABILITY
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<<wcswidth>> has been introduced in the Single UNIX Specification Volume 2.
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<<wcswidth>> has been marked as an extension in the Single UNIX Specification Volume 3.
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*/
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#include <_ansi.h>
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#include <wchar.h>
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int
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_DEFUN (wcswidth, (pwcs, n),
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_CONST wchar_t *pwcs _AND
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size_t n)
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{
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int w, len = 0;
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if (!pwcs || n == 0)
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return 0;
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do {
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if ((w = wcwidth (*pwcs)) < 0)
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return -1;
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len += w;
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} while (*pwcs++ && --n > 0);
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return len;
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}
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