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https://github.com/fish-shell/fish-shell.git
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710 lines
12 KiB
C
710 lines
12 KiB
C
/** \file wutil.c
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Wide character equivalents of various standard unix functions.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <wchar.h>
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#include <wctype.h>
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#include <string.h>
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#include <dirent.h>
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#include <stdarg.h>
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#include <limits.h>
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#include "util.h"
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#include "common.h"
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#include "wutil.h"
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#define TMP_LEN_MIN 256
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/**
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Buffer for converting wide arguments to narrow arguments, used by
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the \c wutil_wcs2str() function.
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*/
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static char *tmp=0;
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/**
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Length of the \c tmp buffer.
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*/
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static size_t tmp_len=0;
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/**
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Counts the number of calls to the wutil wrapper functions
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*/
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static int wutil_calls = 0;
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void wutil_init()
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{
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}
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void wutil_destroy()
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{
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free( tmp );
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tmp=0;
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tmp_len=0;
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debug( 3, L"wutil functions called %d times", wutil_calls );
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}
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/**
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Convert the specified wide aharacter string to a narrow character
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string. This function uses an internal temporary buffer for storing
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the result so subsequent results will overwrite previous results.
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*/
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static char *wutil_wcs2str( const wchar_t *in )
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{
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wutil_calls++;
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size_t new_sz =MAX_UTF8_BYTES*wcslen(in)+1;
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if( tmp_len < new_sz )
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{
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new_sz = maxi( new_sz, TMP_LEN_MIN );
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tmp = realloc( tmp, new_sz );
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if( !tmp )
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{
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die_mem();
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}
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tmp_len = new_sz;
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}
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wcstombs( tmp, in, tmp_len );
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return tmp;
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}
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wchar_t *wgetcwd( wchar_t *buff, size_t sz )
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{
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char buffc[sz*MAX_UTF8_BYTES];
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char *res = getcwd( buffc, sz*MAX_UTF8_BYTES );
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if( !res )
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return 0;
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if( (size_t)-1 == mbstowcs( buff, buffc, sizeof( wchar_t ) * sz ) )
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{
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return 0;
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}
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return buff;
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}
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int wchdir( const wchar_t * dir )
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{
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char *tmp = wutil_wcs2str(dir);
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return chdir( tmp );
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}
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FILE *wfopen(const wchar_t *path, const char *mode)
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{
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char *tmp =wutil_wcs2str(path);
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FILE *res=0;
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if( tmp )
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{
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res = fopen(tmp, mode);
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}
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return res;
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}
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FILE *wfreopen(const wchar_t *path, const char *mode, FILE *stream)
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{
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char *tmp =wutil_wcs2str(path);
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FILE *res=0;
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if( tmp )
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{
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res = freopen(tmp, mode, stream);
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}
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return res;
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}
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int wopen(const wchar_t *pathname, int flags, ...)
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{
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char *tmp =wutil_wcs2str(pathname);
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int res=-1;
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va_list argp;
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if( tmp )
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{
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if( ! (flags & O_CREAT) )
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{
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res = open(tmp, flags);
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}
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else
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{
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va_start( argp, flags );
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res = open(tmp, flags, va_arg(argp, int) );
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va_end( argp );
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}
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}
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return res;
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}
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int wcreat(const wchar_t *pathname, mode_t mode)
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{
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char *tmp =wutil_wcs2str(pathname);
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int res = -1;
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if( tmp )
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{
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res= creat(tmp, mode);
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}
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return res;
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}
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DIR *wopendir(const wchar_t *name)
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{
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char *tmp =wutil_wcs2str(name);
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DIR *res = 0;
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if( tmp )
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{
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res = opendir(tmp);
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}
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return res;
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}
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int wstat(const wchar_t *file_name, struct stat *buf)
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{
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char *tmp =wutil_wcs2str(file_name);
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int res = -1;
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if( tmp )
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{
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res = stat(tmp, buf);
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}
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return res;
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}
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int lwstat(const wchar_t *file_name, struct stat *buf)
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{
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char *tmp =wutil_wcs2str(file_name);
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int res = -1;
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if( tmp )
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{
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res = lstat(tmp, buf);
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}
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return res;
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}
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int waccess(const wchar_t *file_name, int mode)
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{
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char *tmp =wutil_wcs2str(file_name);
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int res = -1;
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if( tmp )
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{
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res= access(tmp, mode);
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}
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return res;
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}
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void wperror(const wchar_t *s)
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{
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if( s != 0 )
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{
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fwprintf( stderr, L"%ls: ", s );
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}
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fwprintf( stderr, L"%s\n", strerror( errno ) );
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}
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#if !HAVE_WPRINTF
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void pad( void (*writer)(wchar_t), int count)
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{
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int i;
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if( count < 0 )
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return;
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for( i=0; i<count; i++ )
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{
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writer( L' ' );
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}
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}
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/**
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Generic formatting function. All other string formatting functions
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are secretly a wrapper around this function. vgprintf does not
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implement all the filters supported by printf, only those that are
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currently used by fish. vgprintf internally uses snprintf to
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implement the %f %d and %u filters.
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Currently supported functionality:
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- precision specification, both through .* and .N
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- width specification through * and N
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- long versions of all filters thorugh l and ll prefix
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- Character outout using %c
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- String output through %s
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- Floating point number output through %f
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- Integer output through %d or %i
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- Unsigned integer output through %u
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- Left padding using the - prefix
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For a full description on the usage of *printf, see use 'man 3 printf'.
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*/
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static int vgwprintf( void (*writer)(wchar_t),
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const wchar_t *filter,
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va_list va )
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{
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const wchar_t *filter_org=filter;
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int count=0;
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for( ;*filter; filter++)
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{
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if(*filter == L'%')
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{
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int is_long=0;
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int width = -1;
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filter++;
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int loop=1;
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int precision=-1;
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int pad_left = 1;
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if( iswdigit( *filter ) )
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{
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width=0;
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while( (*filter >= L'0') && (*filter <= L'9'))
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{
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width=10*width+(*filter++ - L'0');
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}
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}
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while( loop )
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{
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switch(*filter)
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{
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case L'l':
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/* Long variable */
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is_long++;
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filter++;
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break;
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case L'*':
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/* Set minimum field width */
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width = va_arg( va, int );
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filter++;
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break;
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case L'-':
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filter++;
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pad_left=0;
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break;
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case L'.':
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/*
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Set precision.
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*/
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filter++;
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if( *filter == L'*' )
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{
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precision = va_arg( va, int );
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}
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else
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{
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precision=0;
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while( (*filter >= L'0') && (*filter <= L'9'))
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{
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precision=10*precision+(*filter++ - L'0');
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}
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}
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break;
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default:
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loop=0;
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break;
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}
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}
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switch( *filter )
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{
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case L'c':
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{
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wchar_t c;
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if( (width >= 0) && pad_left )
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{
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pad( writer, width-1 );
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count += maxi( width-1, 0 );
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}
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c = is_long?va_arg(va, wchar_t):btowc(va_arg(va, int));
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if( precision != 0 )
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writer( c );
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if( (width >= 0) && !pad_left )
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{
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pad( writer, width-1 );
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count += maxi( width-1, 0 );
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}
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count++;
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break;
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}
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case L's':
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{
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wchar_t *ss=0;
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if( is_long )
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{
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ss = va_arg(va, wchar_t *);
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}
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else
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{
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char *ns = va_arg(va, char*);
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if( ns )
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{
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ss = str2wcs( ns );
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}
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}
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if( !ss )
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{
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return -1;
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}
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if( (width >= 0) && pad_left )
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{
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pad( writer, width-wcslen(ss) );
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count += maxi(width-wcslen(ss), 0);
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}
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wchar_t *s=ss;
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int precount = count;
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while( *s )
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{
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if( (precision > 0) && (precision <= (count-precount) ) )
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break;
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writer( *(s++) );
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count++;
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}
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if( (width >= 0) && !pad_left )
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{
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pad( writer, width-wcslen(ss) );
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count += maxi( width-wcslen(ss), 0 );
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}
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if( !is_long )
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free( ss );
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break;
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}
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case L'd':
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case L'i':
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{
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char str[32];
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char *pos;
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switch( is_long )
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{
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case 0:
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{
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int d = va_arg( va, int );
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if( precision >= 0 )
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snprintf( str, 32, "%.*d", precision, d );
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else
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snprintf( str, 32, "%d", d );
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break;
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}
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case 1:
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{
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long d = va_arg( va, long );
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if( precision >= 0 )
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snprintf( str, 32, "%.*ld", precision, d );
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else
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snprintf( str, 32, "%ld", d );
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break;
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}
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case 2:
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{
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long long d = va_arg( va, long long );
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if( precision >= 0 )
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snprintf( str, 32, "%.*lld", precision, d );
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else
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snprintf( str, 32, "%lld", d );
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break;
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}
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default:
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return -1;
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}
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if( (width >= 0) && pad_left )
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{
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pad( writer, width-strlen(str) );
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count +=maxi(width-strlen(str), 0 );
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}
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pos = str;
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while( *pos )
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{
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writer( *(pos++) );
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count++;
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}
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if( (width >= 0) && !pad_left )
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{
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pad( writer, width-strlen(str) );
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count += maxi(width-strlen(str), 0 );
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}
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break;
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}
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case L'u':
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{
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char str[32];
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char *pos;
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switch( is_long )
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{
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case 0:
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{
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unsigned d = va_arg( va, unsigned );
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if( precision >= 0 )
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snprintf( str, 32, "%.*u", precision, d );
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else
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snprintf( str, 32, "%u", d );
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break;
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}
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case 1:
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{
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unsigned long d = va_arg( va, unsigned long );
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if( precision >= 0 )
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snprintf( str, 32, "%.*lu", precision, d );
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else
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snprintf( str, 32, "%lu", d );
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break;
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}
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case 2:
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{
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unsigned long long d = va_arg( va, unsigned long long );
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if( precision >= 0 )
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snprintf( str, 32, "%.*llu", precision, d );
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else
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snprintf( str, 32, "%llu", d );
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break;
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}
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default:
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return -1;
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}
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if( (width >= 0) && pad_left )
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{
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pad( writer, width-strlen(str) );
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count += maxi( width-strlen(str), 0 );
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}
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pos = str;
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while( *pos )
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{
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writer( *(pos++) );
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count++;
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}
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if( (width >= 0) && !pad_left )
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{
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pad( writer, width-strlen(str) );
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count += maxi( width-strlen(str), 0 );
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}
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break;
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}
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case L'f':
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{
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char str[32];
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char *pos;
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double val = va_arg( va, double );
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if( precision>= 0 )
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{
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if( width>= 0 )
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{
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snprintf( str, 32, "%*.*f", width, precision, val );
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}
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else
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{
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snprintf( str, 32, "%.*f", precision, val );
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}
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}
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else
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{
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if( width>= 0 )
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{
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snprintf( str, 32, "%*f", width, val );
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}
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else
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{
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snprintf( str, 32, "%f", val );
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}
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}
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pos = str;
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while( *pos )
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{
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writer( *(pos++) );
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count++;
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}
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break;
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}
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case L'n':
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{
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int *n = va_arg( va, int *);
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*n = count;
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break;
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}
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case L'%':
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{
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writer('%');
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count++;
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break;
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}
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default:
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debug( 0, L"Unknown switch %lc in string %ls\n", *filter, filter_org );
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// exit(1);
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}
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}
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else
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{
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writer( *filter );
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count++;
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}
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}
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return count;
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}
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/**
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Holds data for swprintf writer
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*/
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static struct
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{
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int count;
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int max;
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wchar_t *pos;
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}
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sw_data;
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/**
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Writers for string output
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*/
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static void sw_writer( wchar_t c )
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{
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if( sw_data.count < sw_data.max )
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*(sw_data.pos++)=c;
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sw_data.count++;
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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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{
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int written;
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sw_data.pos=out;
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sw_data.max=n;
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sw_data.count=0;
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written=vgwprintf( &sw_writer,
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filter,
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va );
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if( written < n )
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{
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*sw_data.pos = 0;
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}
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else
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{
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written=-1;
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}
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return written;
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}
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int swprintf( wchar_t *out, size_t n, const wchar_t *filter, ... )
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|
{
|
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va_list va;
|
|
int written;
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|
|
|
va_start( va, filter );
|
|
written = vswprintf( out, n, filter, va );
|
|
va_end( va );
|
|
return written;
|
|
}
|
|
|
|
/**
|
|
Holds auxiliary data for fwprintf and wprintf writer
|
|
*/
|
|
static FILE *fw_data;
|
|
|
|
static void fw_writer( wchar_t c )
|
|
{
|
|
putwc( c, fw_data );
|
|
}
|
|
|
|
/*
|
|
Writers for file output
|
|
*/
|
|
int vfwprintf( FILE *f, const wchar_t *filter, va_list va )
|
|
{
|
|
fw_data = f;
|
|
return vgwprintf( &fw_writer, filter, va );
|
|
}
|
|
|
|
int fwprintf( FILE *f, const wchar_t *filter, ... )
|
|
{
|
|
va_list va;
|
|
int written;
|
|
|
|
va_start( va, filter );
|
|
written = vfwprintf( f, filter, va );
|
|
va_end( va );
|
|
return written;
|
|
}
|
|
|
|
int vwprintf( const wchar_t *filter, va_list va )
|
|
{
|
|
return vfwprintf( stdout, filter, va );
|
|
}
|
|
|
|
int wprintf( const wchar_t *filter, ... )
|
|
{
|
|
va_list va;
|
|
int written;
|
|
|
|
va_start( va, filter );
|
|
written=vwprintf( filter, va );
|
|
va_end( va );
|
|
return written;
|
|
}
|
|
|
|
#endif
|