72 lines
3.5 KiB
Diff
72 lines
3.5 KiB
Diff
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commit 942670c81dc8071dd75d6213e771daa5d2084cb6
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Author: Arjun Shankar <arjun@redhat.com>
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Date: Tue Jul 30 11:37:57 2024 +0200
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manual/stdio: Further clarify putc, putwc, getc, and getwc
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This is a follow-up to 10de4a47ef3f481592e3c62eb07bcda23e9fde4d that
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reworded the manual entries for putc and putwc and removed any
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performance claims.
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This commit further clarifies these entries and brings getc and getwc in
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line with the descriptions of putc and putwc, removing any performance
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claims from them as well.
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Reviewed-by: Florian Weimer <fweimer@redhat.com>
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diff --git a/manual/stdio.texi b/manual/stdio.texi
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index 0c9a7ce4a9df4c05..567f6780011f9db1 100644
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--- a/manual/stdio.texi
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+++ b/manual/stdio.texi
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@@ -904,20 +904,16 @@ This function is a GNU extension.
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@standards{ISO, stdio.h}
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@safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{}}@acunsafe{@acucorrupt{} @aculock{}}}
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This is just like @code{fputc}, except that it may be implemented as
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-a macro, making it faster. One consequence is that it may evaluate the
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-@var{stream} argument more than once, which is an exception to the
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-general rule for macros. Therefore, @var{stream} should never be an
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-expression with side-effects.
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+a macro and may evaluate the @var{stream} argument more than once.
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+Therefore, @var{stream} should never be an expression with side-effects.
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@end deftypefun
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@deftypefun wint_t putwc (wchar_t @var{wc}, FILE *@var{stream})
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@standards{ISO, wchar.h}
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@safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{}}@acunsafe{@acucorrupt{} @aculock{}}}
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This is just like @code{fputwc}, except that it may be implemented as
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-a macro, making it faster. One consequence is that it may evaluate the
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-@var{stream} argument more than once, which is an exception to the
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-general rule for macros. Therefore, @var{stream} should never be an
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-expression with side-effects.
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+a macro and may evaluate the @var{stream} argument more than once.
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+Therefore, @var{stream} should never be an expression with side-effects.
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@end deftypefun
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@deftypefun int putc_unlocked (int @var{c}, FILE *@var{stream})
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@@ -1110,20 +1106,17 @@ This function is a GNU extension.
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@deftypefun int getc (FILE *@var{stream})
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@standards{ISO, stdio.h}
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@safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{}}@acunsafe{@aculock{} @acucorrupt{}}}
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-This is just like @code{fgetc}, except that it is permissible (and
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-typical) for it to be implemented as a macro that evaluates the
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-@var{stream} argument more than once. @code{getc} is often highly
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-optimized, so it is usually the best function to use to read a single
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-character.
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+This is just like @code{fgetc}, except that it may be implemented as
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+a macro and may evaluate the @var{stream} argument more than once.
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+Therefore, @var{stream} should never be an expression with side-effects.
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@end deftypefun
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@deftypefun wint_t getwc (FILE *@var{stream})
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@standards{ISO, wchar.h}
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@safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{}}@acunsafe{@aculock{} @acucorrupt{}}}
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-This is just like @code{fgetwc}, except that it is permissible for it to
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-be implemented as a macro that evaluates the @var{stream} argument more
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-than once. @code{getwc} can be highly optimized, so it is usually the
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-best function to use to read a single wide character.
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+This is just like @code{fgetwc}, except that it may be implemented as
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+a macro and may evaluate the @var{stream} argument more than once.
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+Therefore, @var{stream} should never be an expression with side-effects.
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@end deftypefun
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@deftypefun int getc_unlocked (FILE *@var{stream})
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