mirror of
https://github.com/fish-shell/fish-shell
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329 lines
8.5 KiB
C
329 lines
8.5 KiB
C
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#ifndef FISH_FALLBACK_H
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#define FISH_FALLBACK_H
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#include <stdio.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <wctype.h>
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#include <wchar.h>
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#include <limits.h>
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#include <sys/time.h>
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#ifndef WCHAR_MAX
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/**
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This _should_ be defined by wchar.h, but e.g. OpenBSD doesn't.
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*/
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#define WCHAR_MAX INT_MAX
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#endif
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/**
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Make sure __func__ is defined to some string. In C99, this should
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be the currently compiled function. If we aren't using C99 or
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later, older versions of GCC had __FUNCTION__.
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*/
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#if __STDC_VERSION__ < 199901L
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# if __GNUC__ >= 2
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# define __func__ __FUNCTION__
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# else
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# define __func__ "<unknown>"
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# endif
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#endif
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/**
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Under curses, tputs expects an int (*func)(char) as its last
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parameter, but in ncurses, tputs expects a int (*func)(int) as its
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last parameter. tputs_arg_t is defined to always be what tputs
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expects. Hopefully.
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*/
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#ifdef NCURSES_VERSION
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typedef int tputs_arg_t;
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#else
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typedef char tputs_arg_t;
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#endif
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#ifdef TPUTS_KLUDGE
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/**
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Linux on PPC seems to have a tputs implementation that sometimes
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behaves strangely. This fallback seems to fix things.
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*/
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int tputs(const char *str, int affcnt, int (*fish_putc)(tputs_arg_t));
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#endif
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#ifndef HAVE_FWPRINTF
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/**
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Print formated string. Some operating systems (Like NetBSD) do not
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have wide string formating functions. Therefore we implement our
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own. Not at all complete. Supports wide and narrow characters,
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strings and decimal numbers, position (%n), field width and
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precision.
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*/
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int fwprintf( FILE *f, const wchar_t *format, ... );
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/**
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Print formated string. Some operating systems (Like NetBSD) do not
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have wide string formating functions. Therefore we define our
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own. Not at all complete. Supports wide and narrow characters,
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strings and decimal numbers, position (%n), field width and
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precision.
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*/
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int swprintf( wchar_t *str, size_t l, const wchar_t *format, ... );
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/**
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Print formated string. Some operating systems (Like NetBSD) do not
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have wide string formating functions. Therefore we define our
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own. Not at all complete. Supports wide and narrow characters,
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strings and decimal numbers, position (%n), field width and
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precision.
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*/
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int wprintf( const wchar_t *format, ... );
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/**
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Print formated string. Some operating systems (Like NetBSD) do not
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have wide string formating functions. Therefore we define our
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own. Not at all complete. Supports wide and narrow characters,
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strings and decimal numbers, position (%n), field width and
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precision.
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*/
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int vwprintf( const wchar_t *filter, va_list va );
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/**
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Print formated string. Some operating systems (Like NetBSD) do not
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have wide string formating functions. Therefore we define our
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own. Not at all complete. Supports wide and narrow characters,
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strings and decimal numbers, position (%n), field width and
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precision.
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*/
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int vfwprintf( FILE *f, const wchar_t *filter, va_list va );
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/**
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Print formated string. Some operating systems (Like NetBSD) do not
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have wide string formating functions. Therefore we define our
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own. Not at all complete. Supports wide and narrow characters,
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strings and decimal numbers, position (%n), field width and
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precision.
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*/
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int vswprintf( wchar_t *out, size_t n, const wchar_t *filter, va_list va );
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#endif
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#ifndef HAVE_FGETWC
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/**
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Fallback implementation of fgetwc
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*/
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wint_t fgetwc(FILE *stream);
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/**
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Fallback implementation of getwc
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*/
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wint_t getwc(FILE *stream);
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#endif
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#ifndef HAVE_FPUTWC
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/**
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Fallback implementation of fputwc
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*/
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wint_t fputwc(wchar_t wc, FILE *stream);
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/**
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Fallback implementation of putwc
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*/
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wint_t putwc(wchar_t wc, FILE *stream);
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#endif
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#ifndef HAVE_WCSTOK
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/**
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Fallback implementation of wcstok. Uses code borrowed from glibc.
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*/
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wchar_t *wcstok(wchar_t *wcs, const wchar_t *delim, wchar_t **ptr);
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#endif
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#ifndef HAVE_WCWIDTH
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/**
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Return the number of columns used by a character. This is a libc
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function, but the prototype for this function is missing in some libc
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implementations.
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Fish has a fallback implementation in case the implementation is
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missing altogether. In locales without a native wcwidth, Unicode
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is probably so broken that it isn't worth trying to implement a
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real wcwidth. Therefore, the fallback wcwidth assumes any printing
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character takes up one column and anything else uses 0 columns.
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*/
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int wcwidth( wchar_t c );
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#endif
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#ifndef HAVE_WCSDUP
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/**
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Create a duplicate string. Wide string version of strdup. Will
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automatically exit if out of memory.
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*/
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wchar_t *wcsdup(const wchar_t *in);
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#endif
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#ifndef HAVE_WCSLEN
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/**
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Fallback for wcsen. Returns the length of the specified string.
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*/
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size_t wcslen(const wchar_t *in);
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#endif
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#ifndef HAVE_WCSCASECMP
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/**
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Case insensitive string compare function. Wide string version of
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strcasecmp.
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This implementation of wcscasecmp does not take into account
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esoteric locales where uppercase and lowercase do not cleanly
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transform between each other. Hopefully this should be fine since
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fish only uses this function with one of the strings supplied by
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fish and guaranteed to be a sane, english word. Using wcscasecmp on
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a user-supplied string should be considered a bug.
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*/
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int wcscasecmp( const wchar_t *a, const wchar_t *b );
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#endif
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#ifndef HAVE_WCSNCASECMP
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/**
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Case insensitive string compare function. Wide string version of
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strncasecmp.
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This implementation of wcsncasecmp does not take into account
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esoteric locales where uppercase and lowercase do not cleanly
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transform between each other. Hopefully this should be fine since
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fish only uses this function with one of the strings supplied by
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fish and guaranteed to be a sane, english word. Using wcsncasecmp on
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a user-supplied string should be considered a bug.
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*/
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int wcsncasecmp( const wchar_t *a, const wchar_t *b, int count );
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/**
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Returns a newly allocated wide character string wich is a copy of
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the string in, but of length c or shorter. The returned string is
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always null terminated, and the null is not included in the string
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length.
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*/
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#endif
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#ifndef HAVE_WCSNDUP
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/**
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Fallback for wcsndup function. Returns a copy of \c in, truncated
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to a maximum length of \c c.
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*/
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wchar_t *wcsndup( const wchar_t *in, int c );
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#endif
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/**
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Converts from wide char to digit in the specified base. If d is not
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a valid digit in the specified base, return -1. This is a helper
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function for wcstol, but it is useful itself, so it is exported.
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*/
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long convert_digit( wchar_t d, int base );
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#ifndef HAVE_WCSTOL
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/**
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Fallback implementation. Convert a wide character string to a
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number in the specified base. This functions is the wide character
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string equivalent of strtol. For bases of 10 or lower, 0..9 are
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used to represent numbers. For bases below 36, a-z and A-Z are used
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to represent numbers higher than 9. Higher bases than 36 are not
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supported.
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*/
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long wcstol(const wchar_t *nptr,
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wchar_t **endptr,
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int base);
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#endif
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#ifndef HAVE_WCSLCAT
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/**
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Appends src to string dst of size siz (unlike wcsncat, siz is the
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full size of dst, not space left). At most siz-1 characters will be
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copied. Always NUL terminates (unless siz <= wcslen(dst)). Returns
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wcslen(src) + MIN(siz, wcslen(initial dst)). If retval >= siz,
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truncation occurred.
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This is the OpenBSD strlcat function, modified for wide characters,
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and renamed to reflect this change.
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*/
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size_t wcslcat( wchar_t *dst, const wchar_t *src, size_t siz );
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#endif
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#ifndef HAVE_WCSLCPY
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/**
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Copy src to string dst of size siz. At most siz-1 characters will
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be copied. Always NUL terminates (unless siz == 0). Returns
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wcslen(src); if retval >= siz, truncation occurred.
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This is the OpenBSD strlcpy function, modified for wide characters,
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and renamed to reflect this change.
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*/
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size_t wcslcpy( wchar_t *dst, const wchar_t *src, size_t siz );
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#endif
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#ifdef HAVE_BROKEN_DEL_CURTERM
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/**
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BSD del_curterm seems to do a double-free. We redefine it as a no-op
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*/
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int del_curterm(TERMINAL *oterm);
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#endif
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#ifndef HAVE_LRAND48_R
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/**
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Datastructure for the lrand48_r fallback implementation.
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*/
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struct drand48_data
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{
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/**
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Seed value
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*/
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unsigned int seed;
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}
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;
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/**
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Fallback implementation of lrand48_r. Internally uses rand_r, so it is pretty weak.
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*/
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int lrand48_r(struct drand48_data *buffer, long int *result);
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/**
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Fallback implementation of srand48_r, the seed function for lrand48_r.
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*/
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int srand48_r(long int seedval, struct drand48_data *buffer);
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#endif
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#ifndef HAVE_FUTIMES
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int futimes(int fd, const struct timeval *times);
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#endif
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#endif
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