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dpavlin |
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/* |
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* HT Editor |
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* file.cc |
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* |
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* Copyright (C) 1999-2002 Stefan Weyergraf |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "file.h" |
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#include <cctype> |
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#include <cerrno> |
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#include <climits> |
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#include <cstdarg> |
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#include <cstdio> |
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#include <cstdlib> |
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#include <cstring> |
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#include <sys/stat.h> |
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/* |
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* COMMON SYS |
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*/ |
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#ifndef S_IFMT |
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#define S_IFMT 0xf000 |
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#endif |
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#ifndef S_ISREG |
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# ifndef S_IFREG |
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# define S_ISREG(m) (0) |
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# else |
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# define S_ISREG(m) (((m) & S_IFMT)==S_IFREG) |
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# endif |
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#endif |
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#ifndef S_ISBLK |
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# ifndef S_IFBLK |
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# define S_ISBLK(m) (0) |
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# else |
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# define S_ISBLK(m) (((m) & S_IFMT)==S_IFBLK) |
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# endif |
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#endif |
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#ifndef S_ISCHR |
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# ifndef S_IFCHR |
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# define S_ISCHR(m) (0) |
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# else |
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# define S_ISCHR(m) (((m) & S_IFMT)==S_IFCHR) |
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# endif |
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#endif |
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#ifndef S_ISDIR |
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# ifndef S_IFDIR |
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# define S_ISDIR(m) (0) |
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# else |
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# define S_ISDIR(m) (((m) & S_IFMT)==S_IFDIR) |
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# endif |
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#endif |
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#ifndef S_ISFIFO |
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# ifndef S_IFFIFO |
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# define S_ISFIFO(m) (0) |
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# else |
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# define S_ISFIFO(m) (((m) & S_IFMT)==S_IFFIFO) |
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# endif |
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#endif |
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#ifndef S_ISLNK |
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# ifndef S_IFLNK |
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# define S_ISLNK(m) (0) |
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# else |
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# define S_ISLNK(m) (((m) & S_IFMT)==S_IFLNK) |
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# endif |
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#endif |
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#ifndef S_ISSOCK |
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# ifndef S_IFSOCK |
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# define S_ISSOCK(m) (0) |
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# else |
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# define S_ISSOCK(m) (((m) & S_IFMT)==S_IFSOCK) |
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# endif |
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#endif |
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#ifndef S_IRUSR |
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#define S_IRUSR 0 |
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#endif |
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#ifndef S_IRGRP |
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#define S_IRGRP 0 |
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#endif |
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#ifndef S_IROTH |
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#define S_IROTH 0 |
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#endif |
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#ifndef S_IWUSR |
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#define S_IWUSR 0 |
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#endif |
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#ifndef S_IWGRP |
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#define S_IWGRP 0 |
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#endif |
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#ifndef S_IWOTH |
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#define S_IWOTH 0 |
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#endif |
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#ifndef S_IXUSR |
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#define S_IXUSR 0 |
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#endif |
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#ifndef S_IXGRP |
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#define S_IXGRP 0 |
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#endif |
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#ifndef S_IXOTH |
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#define S_IXOTH 0 |
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#endif |
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int sys_basename(char *result, const char *filename) |
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{ |
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// FIXME: use is_path_delim |
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char *slash1 = strrchr(filename, '/'); |
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char *slash2 = strrchr(filename, '\\'); |
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char *slash=(slash1>slash2) ? slash1 : slash2; |
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if (slash) { |
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int l=strlen(filename); |
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strncpy(result, slash+1, l-(slash-filename)-1); |
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result[l-(slash-filename)-1]=0; |
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return 0; |
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} |
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strcpy(result, filename); |
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return 0; |
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} |
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int sys_dirname(char *result, const char *filename) |
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{ |
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// FIXME: use is_path_delim |
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char *slash1 = strrchr(filename, '/'); |
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char *slash2 = strrchr(filename, '\\'); |
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char *slash = (slash1>slash2) ? slash1 : slash2; |
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if (slash) { |
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strncpy(result, filename, slash-filename); |
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result[slash-filename] = 0; |
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return 0; |
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} |
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strcpy(result, "."); |
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return 0; |
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} |
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/* filename and pathname must be canonicalized */ |
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int sys_relname(char *result, const char *filename, const char *cwd) |
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{ |
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const char *f = filename, *p = cwd; |
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while ((*f == *p) && (*f)) { |
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f++; |
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p++; |
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} |
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if (*f == '/') f++; |
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const char *last = f, *h = f; |
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while (*h) { |
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if (*h == '/') { |
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*(result++) = '.'; |
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*(result++) = '.'; |
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*(result++) = '/'; |
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last = h+1; |
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} |
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h++; |
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} |
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while (f<last) { |
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*(result++) = *f; |
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f++; |
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} |
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*result = 0; |
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strcat(result, last); |
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return 0; |
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} |
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int sys_ht_mode(int mode) |
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{ |
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int m = 0; |
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if (S_ISREG(mode)) { |
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m |= HT_S_IFREG; |
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} else if (S_ISBLK(mode)) { |
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m |= HT_S_IFBLK; |
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} else if (S_ISCHR(mode)) { |
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m |= HT_S_IFCHR; |
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} else if (S_ISDIR(mode)) { |
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m |= HT_S_IFDIR; |
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} else if (S_ISFIFO(mode)) { |
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m |= HT_S_IFFIFO; |
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} else if (S_ISLNK(mode)) { |
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m |= HT_S_IFLNK; |
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} else if (S_ISSOCK(mode)) { |
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m |= HT_S_IFSOCK; |
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} |
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if (mode & S_IRUSR) m |= HT_S_IRUSR; |
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if (mode & S_IRGRP) m |= HT_S_IRGRP; |
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if (mode & S_IROTH) m |= HT_S_IROTH; |
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if (mode & S_IWUSR) m |= HT_S_IWUSR; |
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if (mode & S_IWGRP) m |= HT_S_IWGRP; |
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if (mode & S_IWOTH) m |= HT_S_IWOTH; |
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if (mode & S_IXUSR) m |= HT_S_IXUSR; |
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if (mode & S_IXGRP) m |= HT_S_IXGRP; |
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if (mode & S_IXOTH) m |= HT_S_IXOTH; |
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return m; |
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} |
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static char *next_delim(char *s, is_path_delim delim) |
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{ |
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while (*s) { |
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s++; |
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if (delim(*s)) return s; |
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} |
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return NULL; |
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} |
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static int flatten_path(char *path, is_path_delim delim) |
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{ |
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if (!path || !*path) |
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return 0; |
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char *q = next_delim(path, delim); |
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int pp = flatten_path(q, delim); |
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int ll = q ? (q-path-1) : strlen(path)-1; |
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if ((ll == 2) && (strncmp(path+1, "..", 2) == 0)) { |
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if (q) memmove(path, q, strlen(q)+1); else *path = 0; |
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pp++; |
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} else if ((ll == 1) && (strncmp(path+1, ".", 1) == 0)) { |
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if (q) memmove(path, q, strlen(q)+1); else *path = 0; |
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} else if (pp) { |
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if (q) memmove(path, q, strlen(q)+1); else *path = 0; |
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pp--; |
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} |
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return pp; |
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} |
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bool sys_path_is_absolute(const char *filename, is_path_delim delim) |
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{ |
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return delim(filename[0]) || (isalpha(filename[0]) && (filename[1] == ':')); |
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} |
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int sys_common_canonicalize(char *result, const char *filename, const char *cwd, is_path_delim delim) |
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{ |
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char *o = result; |
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if (!sys_path_is_absolute(filename, delim)) { |
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if (cwd) strcpy(o, cwd); else return EINVAL; |
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int ol = strlen(o); |
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if (ol && !delim(o[ol-1])) { |
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o[ol] = '/'; |
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o[ol+1] = 0; |
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} |
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} else *o = 0; |
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strcat(o, filename); |
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int k = flatten_path(o, delim); |
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return (k == 0) ? 0 : EINVAL; |
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} |
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char *sys_filename_suffix(const char *fn) |
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{ |
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const char *s = NULL; |
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while (fn && *fn) { |
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if (sys_is_path_delim(*fn)) s = fn+1; |
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fn++; |
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} |
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char *p = s ? strrchr(s, '.') : NULL; |
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return p ? p+1 : NULL; |
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} |
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int sys_tmpfile_fd() |
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{ |
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#if 1 |
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// FIXME: this might leak something... |
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FILE *f = tmpfile(); |
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return fileno(f); |
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#else |
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// is this better ? |
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return open(tmpnam(NULL), O_RDWR | O_EXCL | O_CREAT); |
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#endif |
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} |
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