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|
/*
* ========================================================================
* Copyright 2013-2022 Eduardo Chappa
* Copyright 2006-2007 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
/* includable WITHOUT dependency on c-client */
#include "../../c-client/mail.h"
#include "../../c-client/utf8.h"
#ifdef _WINDOWS
/* wingdi.h uses ERROR (!) and we aren't using the c-client ERROR so... */
#undef ERROR
#endif
#include <system.h>
#include <general.h>
#include "../../c-client/fs.h"
/* includable WITHOUT dependency on pico */
#include "../../pico/keydefs.h"
#ifdef _WINDOWS
#include "../../pico/osdep/mswin.h"
#endif
#include "filesys.h"
#include "utf8.h"
#define bad_char ((UCS) '?')
/*
* Make it easier to use the convert_to_locale function for filenames
* and directory names. Note, only one at a time because there's only
* one buffer.
* This isn't being freed as it stands now.
*/
char *
fname_to_locale(char *fname)
{
static char *fname_locale_buf = NULL;
static size_t fname_locale_len = 0;
char *converted_fname, *p;
if(fname == NULL){ /* special call to free memory */
if(fname_locale_buf) fs_give((void **) &fname_locale_buf);
fname_locale_len = 0;
return NULL;
}
p = convert_to_locale(fname);
if(p)
converted_fname = p;
else
converted_fname = fname;
if(converted_fname){
if(strlen(converted_fname)+1 > fname_locale_len){
if(fname_locale_buf)
fs_give((void **) &fname_locale_buf);
fname_locale_len = strlen(converted_fname)+1;
fname_locale_buf = (char *) fs_get(fname_locale_len * sizeof(char));
}
strncpy(fname_locale_buf, converted_fname, fname_locale_len);
fname_locale_buf[fname_locale_len-1] = '\0';
}
else{
if(fname_locale_len == 0){
fname_locale_len = 1;
fname_locale_buf = (char *) fs_get(fname_locale_len * sizeof(char));
}
fname_locale_buf[0] = '\0';
}
if(p)
fs_give((void **) &p);
return(fname_locale_buf);
}
/*
* Make it easier to use the convert_to_utf8 function for filenames
* and directory names. Note, only one at a time because there's only
* one buffer.
* This isn't being freed as it stands now.
*/
char *
fname_to_utf8(char *fname)
{
static char *fname_utf8_buf = NULL;
static size_t fname_utf8_len = 0;
char *converted_fname, *p;
if(fname == NULL){ /* special call to free memory */
if(fname_utf8_buf) fs_give((void **) &fname_utf8_buf);
fname_utf8_len = 0;
return NULL;
}
p = convert_to_utf8(fname, NULL, 0);
if(p)
converted_fname = p;
else
converted_fname = fname;
if(converted_fname){
if(strlen(converted_fname)+1 > fname_utf8_len){
if(fname_utf8_buf)
fs_give((void **) &fname_utf8_buf);
fname_utf8_len = strlen(converted_fname)+1;
fname_utf8_buf = (char *) fs_get(fname_utf8_len * sizeof(char));
}
strncpy(fname_utf8_buf, converted_fname, fname_utf8_len);
fname_utf8_buf[fname_utf8_len-1] = '\0';
}
else{
if(fname_utf8_len == 0){
fname_utf8_len = 1;
fname_utf8_buf = (char *) fs_get(fname_utf8_len * sizeof(char));
}
fname_utf8_buf[0] = '\0';
}
if(p)
fs_give((void **) &p);
return(fname_utf8_buf);
}
/*
* The fp file pointer is open for read on a file which has contents
* that are encoded in the user's locale charset. That multibyte stream
* of characters is converted to wide characters and returned one at
* a time.
*
* Not sure what to do if an uninterpretable character happens. Returning
* the bad character now.
*/
UCS
read_a_wide_char(FILE *fp,
void *input_cs) /* input_cs ignored in Windows */
{
#ifdef _WINDOWS
_TINT val;
val = _fgettc(fp);
if(val == _TEOF)
return(CCONV_EOF);
return((UCS) val);
#else /* UNIX */
unsigned long octets_so_far, remaining_octets;
unsigned char *inputp;
unsigned char inputbuf[20];
int c;
UCS ucs;
c = fgetc(fp);
if(c == EOF)
return(CCONV_EOF);
/*
* Read enough bytes to make up a character and convert it to UCS-4.
*/
memset(inputbuf, 0, sizeof(inputbuf));
inputbuf[0] = (unsigned char) c;
octets_so_far = 1;
for(;;){
remaining_octets = octets_so_far;
inputp = inputbuf;
ucs = mbtow(input_cs, &inputp, &remaining_octets);
switch(ucs){
case CCONV_BADCHAR:
return(bad_char);
case CCONV_NEEDMORE:
if(octets_so_far >= sizeof(inputbuf))
return(bad_char);
c = fgetc(fp);
if(c == EOF)
return(CCONV_EOF);
inputbuf[octets_so_far++] = (unsigned char) c;
break;
default:
/* got a good UCS-4 character */
return(ucs);
}
}
return(bad_char);
#endif /* UNIX */
}
int
write_a_wide_char(UCS ucs, FILE *fp)
{
#ifdef _WINDOWS
int rv = 1;
TCHAR w;
w = (TCHAR) ucs;
if(_fputtc(w, fp) == _TEOF)
rv = EOF;
return(rv);
#else /* UNIX */
int rv = 1;
int i, outchars;
unsigned char obuf[MAX(MB_LEN_MAX,32)];
if(ucs < 0x80){
obuf[0] = (unsigned char) ucs;
outchars = 1;
}
else{
outchars = wtomb((char *) obuf, ucs);
if(outchars < 0){
outchars = 1;
obuf[0] = bad_char; /* ??? */
}
}
for(i = 0; i < outchars; i++)
if(fputc(obuf[i], fp) == EOF){
rv = EOF;
break;
}
return(rv);
#endif /* UNIX */
}
int
our_stat(char *filename, struct stat *sbuf)
{
#ifdef _WINDOWS
LPTSTR f = NULL;
int ret = -1;
struct _stat s;
f = utf8_to_lptstr((LPSTR) filename);
if(f){
ret = _tstat(f, &s);
sbuf->st_dev = s.st_dev;
sbuf->st_ino = s.st_ino;
sbuf->st_mode = s.st_mode;
sbuf->st_nlink = s.st_nlink;
sbuf->st_uid = s.st_uid;
sbuf->st_gid = s.st_gid;
sbuf->st_rdev = s.st_rdev;
sbuf->st_size = s.st_size;
sbuf->st_atime = (time_t) s.st_atime;
sbuf->st_mtime = (time_t) s.st_mtime;
sbuf->st_ctime = (time_t) s.st_ctime;
fs_give((void **) &f);
}
return ret;
#else /* UNIX */
return(stat(fname_to_locale(filename), sbuf));
#endif /* UNIX */
}
int
our_lstat(char *filename, struct stat *sbuf)
{
#ifdef _WINDOWS
assert(0); /* lstat not used in Windows */
return(-1);
#else /* UNIX */
return(lstat(fname_to_locale(filename), sbuf));
#endif /* UNIX */
}
FILE *
our_fopen(char *path, char *mode)
{
#ifdef _WINDOWS
LPTSTR p = NULL, m = NULL;
FILE *ret = NULL;
char *mode_with_ccs = NULL;
char buf[500];
size_t len;
if(mode && (*mode == 'r' || *mode == 'a')){
char *force_bom_check = ", ccs=UNICODE";
if(strchr(mode, 'b'))
mode_with_ccs = mode;
else{
/*
* The docs seem to say that we don't need the ccs parameter and
* if the file has a BOM at the beginning it will notice that and
* use it. However, we're not seeing that. Instead, what we see is
* that giving a parameter of UNICODE causes the desired behavior.
* This causes it to check for a BOM and if it finds one it uses it.
* If it doesn't find one, it treats the file as ANSI, which is what
* we want.
*/
if((len = strlen(mode) + strlen(force_bom_check)) < sizeof(buf)){
len = sizeof(buf)-1;
mode_with_ccs = buf;
}
else
mode_with_ccs = (char *) MemAlloc((len+1) * sizeof(char));
if(mode_with_ccs)
snprintf(mode_with_ccs, len+1, "%s%s", mode, force_bom_check);
else
mode_with_ccs = mode; /* can't happen */
}
}
else if(mode && (*mode == 'w')){
char *force_utf8 = ", ccs=UTF-8";
if(strchr(mode, 'b'))
mode_with_ccs = mode;
else{
if((len = strlen(mode) + strlen(force_utf8)) < sizeof(buf)){
len = sizeof(buf)-1;
mode_with_ccs = buf;
}
else
mode_with_ccs = (char *) MemAlloc((len+1) * sizeof(char));
if(mode_with_ccs)
snprintf(mode_with_ccs, len+1, "%s%s", mode, force_utf8);
else
mode_with_ccs = mode; /* can't happen */
}
}
p = utf8_to_lptstr((LPSTR) path);
if(p){
m = utf8_to_lptstr((LPSTR) mode_with_ccs);
if(m){
ret = _tfopen(p, m);
MemFree((void *) m);
}
fs_give((void **) &p);
}
if(mode_with_ccs && mode_with_ccs != buf && mode_with_ccs != mode)
MemFree((void *) mode_with_ccs);
return ret;
#else /* UNIX */
return(fopen(fname_to_locale(path), mode));
#endif /* UNIX */
}
int
our_open(char *path, int flags, mode_t mode)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
/*
* Setting the _O_WTEXT flag when opening a file for reading
* will cause us to read the first few bytes to check for
* a BOM and to translate from that encoding if we find it.
* This only works with stream I/O, not low-level read/write.
*
* When opening for writing the flag _O_U8TEXT will cause
* us to put a UTF-8 BOM at the start of the file.
*
* O_TEXT will cause LF -> CRLF on output, opposite on input
* O_BINARY suppresses that.
* _O_U8TEXT implies O_TEXT.
*/
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _topen(p, flags, mode);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(open(fname_to_locale(path), flags, mode));
#endif /* UNIX */
}
int
our_creat(char *path, mode_t mode)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _tcreat(p, mode);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(creat(fname_to_locale(path), mode));
#endif /* UNIX */
}
int
our_mkdir(char *path, mode_t mode)
{
#ifdef _WINDOWS
/* mode is a noop for _WINDOWS */
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _tmkdir(p);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(mkdir(fname_to_locale(path), mode));
#endif /* UNIX */
}
int
our_rename(char *oldpath, char *newpath)
{
#ifdef _WINDOWS
LPTSTR pold = NULL, pnew = NULL;
int ret = -1;
pold = utf8_to_lptstr((LPSTR) oldpath);
pnew = utf8_to_lptstr((LPSTR) newpath);
if(pold && pnew)
ret = _trename(pold, pnew);
if(pold)
fs_give((void **) &pold);
if(pnew)
fs_give((void **) &pnew);
return ret;
#else /* UNIX */
char *p, *pold;
size_t len;
int ret = -1;
p = fname_to_locale(oldpath);
if(p){
len = strlen(p);
pold = (char *) fs_get((len+1) * sizeof(char));
strncpy(pold, p, len+1);
pold[len] = '\0';
ret = rename(pold, fname_to_locale(newpath));
fs_give((void **) &pold);
}
return ret;
#endif /* UNIX */
}
int
our_rmdir(char *path)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _trmdir(p);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(rmdir(fname_to_locale(path)));
#endif /* UNIX */
}
int
our_unlink(char *path)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _tunlink(p);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(unlink(fname_to_locale(path)));
#endif /* UNIX */
}
int
our_link(char *oldpath, char *newpath)
{
#ifdef _WINDOWS
assert(0); /* link not used in Windows */
return(-1);
#else /* UNIX */
char *p, *pold;
size_t len;
int ret = -1;
p = fname_to_locale(oldpath);
if(p){
len = strlen(p);
pold = (char *) fs_get((len+1) * sizeof(char));
strncpy(pold, p, len+1);
pold[len] = '\0';
ret = link(pold, fname_to_locale(newpath));
fs_give((void **) &pold);
}
return ret;
#endif /* UNIX */
}
int
our_truncate(char *path, off_t size)
{
int ret = -1;
#if defined(_WINDOWS) || !defined(HAVE_TRUNCATE)
int fdes;
#endif
#ifdef _WINDOWS
if((fdes = our_open(path, O_RDWR | O_CREAT | S_IREAD | S_IWRITE | _O_U8TEXT, 0600)) != -1){
if(chsize(fdes, size) == 0)
ret = 0;
close(fdes);
}
#else /* UNIX */
#ifdef HAVE_TRUNCATE
ret = truncate(fname_to_locale(path), size);
#else /* !HAVE_TRUNCATE */
if((fdes = our_open(path, O_RDWR, 0600)) != -1){
ret = chsize(fdes, size) ;
if(close(fdes))
ret = -1;
}
#endif /* !HAVE_TRUNCATE */
#endif /* UNIX */
return ret;
}
int
our_chmod(char *path, mode_t mode)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _tchmod(p, mode);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(chmod(fname_to_locale(path), mode));
#endif /* UNIX */
}
int
our_chown(char *path, uid_t owner, gid_t group)
{
#ifdef _WINDOWS
return 0;
#else /* UNIX */
return(chown(fname_to_locale(path), owner, group));
#endif /* UNIX */
}
int
our_utime(char *path, struct utimbuf *buf)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _tutime(p, buf);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(utime(fname_to_locale(path), buf));
#endif /* UNIX */
}
/*
* Return a malloc'd utf8-encoded char * of the provided environment
* variable. The env_variable argument is assumed not to be UTF-8. Returns
* NULL if no such environment variable.
*
* We'll pretty much swap out getenv's where convenient. Windows pretty
* much doesn't want to do getenv once we do unicode
*/
char *
our_getenv(char *env_variable)
{
#ifdef _WINDOWS
TCHAR lptstr_env_variable[MAXPATH+1], *p;
int i;
for(i = 0; env_variable[i] && i < MAXPATH; i++)
lptstr_env_variable[i] = env_variable[i];
lptstr_env_variable[i] = '\0';
if(p = _tgetenv(lptstr_env_variable))
return(lptstr_to_utf8(p));
else
return(NULL);
#else /* !_WINDOWS */
char *p, *utf8_p, *env_cpy;
size_t len;
if((p = getenv(env_variable)) != NULL){
/* all this when what we want is a cpystr */
utf8_p = fname_to_utf8(p);
len = strlen(utf8_p);
env_cpy = (char *)fs_get((len+1)*sizeof(char));
strncpy(env_cpy, utf8_p, len+1);
env_cpy[len] = '\0';
return(env_cpy);
}
else
return(NULL);
#endif /* !_WINDOWS */
}
int
our_access(char *path, int mode)
{
#ifdef _WINDOWS
LPTSTR p = NULL;
int ret = -1;
p = utf8_to_lptstr((LPSTR) path);
if(p){
ret = _taccess(p, mode);
fs_give((void **) &p);
}
return ret;
#else /* UNIX */
return(access(fname_to_locale(path), mode));
#endif /* UNIX */
}
/*
* Fgets that doesn't do any character encoding translation or any
* of that Windows stuff.
*/
char *
fgets_binary(char *s, int size, FILE *fp)
{
#ifdef _WINDOWS
char *p;
char c;
int r;
/*
* Use fread low-level input instead of fgets.
* Maybe if we understood better we wouldn't need this.
*/
if(!s)
return s;
p = s;
while(p-s < size-1 && (r=fread(&c, sizeof(c), (size_t) 1, fp)) == 1 && c != '\n')
*p++ = c;
if(p-s < size-1 && r == 1){
/* must have gotten to end of line */
*p++ = '\n';
}
*p = '\0';
return(s);
#else /* UNIX */
return(fgets(s, size, fp));
#endif /* UNIX */
}
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