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/* Copyright (c) 2004-2005 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#ifdef MSW
#include <io.h>
#else
#include <unistd.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "m_pd.h"
#include "os.h"
static int ospath_doabsolute(char *path, char *cwd, char *result)
{
if (*path == 0)
{
if (result)
strcpy(result, cwd);
else
return (strlen(cwd));
}
else if (*path == '~')
{
path++;
if (*path == '/' || *path == 0)
{
#ifdef UNIX
char *home = getenv("HOME");
if (home)
{
if (result)
{
strcpy(result, home);
if (*path)
strcat(result, path);
}
else return (strlen(home) + strlen(path));
}
else goto badpath;
#else
goto badpath;
#endif
}
else goto badpath;
}
else if (*path == '/')
{
#ifdef MSW
/* path is absolute, drive is implicit, LATER UNC? */
if (*cwd && cwd[1] == ':')
{
if (result)
{
*result = *cwd;
result[1] = ':';
strcpy(result + 2, path);
}
else return (2 + strlen(path));
}
else goto badpath;
#else
/* path is absolute */
if (result)
strcpy(result, path);
else
return (strlen(path));
#endif
}
else
{
#ifdef MSW
if (path[1] == ':')
{
if (path[2] == '/')
{
/* path is absolute */
if (result)
strcpy(result, path);
else
return (strlen(path));
}
else if (*cwd == *path)
{
/* path is relative, drive is explicitly current */
if (result)
{
int ndx = strlen(cwd);
strcpy(result, cwd);
result[ndx++] = '/';
strcpy(result + ndx, path + 2);
}
else return (strlen(cwd) + strlen(path) - 1);
}
/* we do not maintain per-drive cwd, LATER rethink */
else goto badpath;
}
/* LATER devices? */
else
{
/* path is relative */
if (result)
{
int ndx = strlen(cwd);
strcpy(result, cwd);
result[ndx++] = '/';
strcpy(result + ndx, path);
}
else return (strlen(cwd) + 1 + strlen(path));
}
#else
/* path is relative */
if (result)
{
int ndx = strlen(cwd);
strcpy(result, cwd);
result[ndx++] = '/';
strcpy(result + ndx, path);
}
else return (strlen(cwd) + 1 + strlen(path));
#endif
}
if (result && *result && *result != '.')
{
/* clean-up */
char *inptr, *outptr = result;
int ndx = strlen(result);
if (result[ndx - 1] == '.')
{
result[ndx] = '/'; /* guarding slash */
result[ndx + 1] = 0;
}
for (inptr = result + 1; *inptr; inptr++)
{
if (*inptr == '/')
{
if (*outptr == '/')
continue;
else if (*outptr == '.')
{
if (outptr[-1] == '/')
{
outptr--;
continue;
}
else if (outptr[-1] == '.' && outptr[-2] == '/')
{
outptr -= 2;
if (outptr == result)
continue;
else for (outptr--; outptr != result; outptr--)
if (*outptr == '/')
break;
continue;
}
}
}
*++outptr = *inptr;
}
if (*outptr == '/' && outptr != result)
*outptr = 0;
else
outptr[1] = 0;
}
else bug("ospath_doabsolute 1");
return (0);
badpath:
if (result)
bug("ospath_doabsolute 2");
return (0);
}
/* Returns an estimated length of an absolute path made up from the first arg.
The actual ospath_absolute()'s length may be shorter (since it erases
superfluous slashes and dots), but not longer. Both args should be unbashed
(system-independent), cwd should be absolute. Returns 0 in case of any
error (LATER revisit). */
int ospath_length(char *path, char *cwd)
{
/* one extra byte used internally (guarding slash) */
return (ospath_doabsolute(path, cwd, 0) + 1);
}
/* Copies an absolute path to result. Arguments: path and cwd, are the same
as in ospath_length(). Caller should first consult ospath_length(), and
allocate at least ospath_length() + 1 bytes to the result buffer.
Should never fail (failure is a bug). */
char *ospath_absolute(char *path, char *cwd, char *result)
{
ospath_doabsolute(path, cwd, result);
return (result);
}
FILE *fileread_open(char *filename, t_canvas *cv, int textmode)
{
int fd;
char path[MAXPDSTRING+2], *nameptr;
t_symbol *dirsym = (cv ? canvas_getdir(cv) : 0);
/* path arg is returned unbashed (system-independent) */
if ((fd = open_via_path((dirsym ? dirsym->s_name : ""), filename,
"", path, &nameptr, MAXPDSTRING, 1)) < 0)
return (0);
/* Closing/reopening dance. This is unnecessary under linux, and we
could have tried to convert fd to fp, but under windows open_via_path()
returns what seems to be an invalid fd.
LATER try to understand what is going on here... */
close(fd);
if (path != nameptr)
{
char *slashpos = path + strlen(path);
*slashpos++ = '/';
/* try not to be dependent on current open_via_path() implementation */
if (nameptr != slashpos)
strcpy(slashpos, nameptr);
}
sys_bashfilename(path, path);
return (fopen(path, (textmode ? "r" : "rb")));
}
FILE *filewrite_open(char *filename, t_canvas *cv, int textmode)
{
char path[MAXPDSTRING+2];
if (cv)
/* path arg is returned unbashed (system-independent) */
canvas_makefilename(cv, filename, path, MAXPDSTRING);
else
{
strncpy(path, filename, MAXPDSTRING);
path[MAXPDSTRING-1] = 0;
}
sys_bashfilename(path, path);
return (fopen(path, (textmode ? "w" : "wb")));
}
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