102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*
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* "$Id$"
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*
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* Numeric sorting routine for the Fast Light Tool Kit (FLTK).
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*
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* Copyright 1998-2016 by Bill Spitzak and others.
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*
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* This library is free software. Distribution and use rights are outlined in
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* the file "COPYING" which should have been included with this file. If this
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* file is missing or damaged, see the license at:
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*
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* http://www.fltk.org/COPYING.php
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*
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* Please report all bugs and problems on the following page:
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*
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* http://www.fltk.org/str.php
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*/
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/* My own scandir sorting function, useful for the film industry where
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we have many files with numbers in their names: */
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#include <config.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#if !defined(WIN32) || defined(__CYGWIN__)
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# ifdef HAVE_DIRENT_H
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# include <dirent.h>
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# else
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# define dirent direct
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# ifdef HAVE_SYS_NDIR_H
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# include <sys/ndir.h>
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# endif /* HAVE_SYS_NDIR_H */
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# ifdef HAVE_SYS_DIR_H
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# include <sys/dir.h>
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# endif /* HAVE_SYS_DIR_H */
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# ifdef HAVE_NDIR_H
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# include <ndir.h>
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# endif /* HAVE_NDIR_H */
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# endif /* HAVE_DIRENT_H */
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#endif /* !WIN32 || __CYGWIN__ */
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#include <FL/filename.H>
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/*
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* 'numericsort()' - Compare two directory entries, possibly with
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* a case-insensitive comparison...
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*/
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static int numericsort(struct dirent **A, struct dirent **B, int cs) {
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const char* a = (*A)->d_name;
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const char* b = (*B)->d_name;
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int ret = 0;
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for (;;) {
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if (isdigit(*a & 255) && isdigit(*b & 255)) {
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int diff,magdiff;
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while (*a == '0') a++;
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while (*b == '0') b++;
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while (isdigit(*a & 255) && *a == *b) {a++; b++;}
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diff = (isdigit(*a & 255) && isdigit(*b & 255)) ? *a - *b : 0;
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magdiff = 0;
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while (isdigit(*a & 255)) {magdiff++; a++;}
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while (isdigit(*b & 255)) {magdiff--; b++;}
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if (magdiff) {ret = magdiff; break;} /* compare # of significant digits*/
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if (diff) {ret = diff; break;} /* compare first non-zero digit */
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} else {
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if (cs) {
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/* compare case-sensitive */
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if ((ret = *a-*b)) break;
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} else {
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/* compare case-insensitve */
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if ((ret = tolower(*a & 255)-tolower(*b & 255))) break;
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}
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if (!*a) break;
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a++; b++;
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}
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}
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if (!ret) return 0;
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else return (ret < 0) ? -1 : 1;
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}
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/*
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* 'fl_casenumericsort()' - Compare directory entries with case-sensitivity.
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*/
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int fl_casenumericsort(struct dirent **A, struct dirent **B) {
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return numericsort(A, B, 0);
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}
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/*
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* 'fl_numericsort()' - Compare directory entries with case-sensitivity.
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*/
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int fl_numericsort(struct dirent **A, struct dirent **B) {
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return numericsort(A, B, 1);
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}
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/*
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* End of "$Id$".
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*/
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