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Author: Andreas Tille <tille@debian.org>
Last-Update: Thu, 23 Jun 2016 09:10:54 +0200
Origin: https://github.com/ekg/filevercmp
Description: Inject two files via quilt patch
It would be better to use filevercmp module from gnulib package via
gnulib-tool --import filevercmp
but this would require configure.ac which is not (yet) done.
.
Upstream provides a copy of the code inside gnulib at
https://github.com/ekg/filevercmp
and thus it seems to be simpler to use this here at least for the moment.
@@ -191,7 +191,12 @@ $(FASTAHACK): pre
# cd fsom && $(CXX) $(CXXFLAGS) -c fsom.c -lm
$(FILEVERCMP): pre
- cd filevercmp && make && cp *.h* $(VCF_LIB_LOCAL)/$(INC_DIR)/ && cp *.o $(VCF_LIB_LOCAL)/$(INC_DIR)/
+ #mkdir -p filevercmp
+ #cp /usr/share/gnulib/lib/filevercmp.* filevercmp
+ #echo 'Proper use of filevercmp would be: `gnulib-tool --import filevercmp` - but it needs ./configure.ac'
+ #We here go with quilt patches from upstream files
+ cd filevercmp && $(CXX) $(CXXFLAGS) -c filevercmp.c
+ ln -sf ../filevercmp/filevercmp.h $(VCF_LIB_LOCAL)/$(INC_DIR)/filevercmp.h
$(SHORTBINS): pre
$(MAKE) bin/$@
--- /dev/null
+++ b/filevercmp/filevercmp.h
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+/*
+ Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
+ Copyright (C) 2001 Anthony Towns <aj@azure.humbug.org.au>
+ Copyright (C) 2008-2009 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef FILEVERCMP_H
+#define FILEVERCMP_H
+
+/* Compare version strings:
+
+ This function compares strings S1 and S2:
+ 1) By PREFIX in the same way as strcmp.
+ 2) Then by VERSION (most similarly to version compare of Debian's dpkg).
+ Leading zeros in version numbers are ignored.
+ 3) If both (PREFIX and VERSION) are equal, strcmp function is used for
+ comparison. So this function can return 0 if (and only if) strings S1
+ and S2 are identical.
+
+ It returns number >0 for S1 > S2, 0 for S1 == S2 and number <0 for S1 < S2.
+
+ This function compares strings, in a way that if VER1 and VER2 are version
+ numbers and PREFIX and SUFFIX (SUFFIX defined as (\.[A-Za-z~][A-Za-z0-9~]*)*)
+ are strings then VER1 < VER2 implies filevercmp (PREFIX VER1 SUFFIX,
+ PREFIX VER2 SUFFIX) < 0.
+
+ This function is intended to be a replacement for strverscmp. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int filevercmp (const char *s1, const char *s2);
+
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+#endif /* FILEVERCMP_H */
--- /dev/null
+++ b/filevercmp/filevercmp.c
@@ -0,0 +1,180 @@
+/*
+ Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
+ Copyright (C) 2001 Anthony Towns <aj@azure.humbug.org.au>
+ Copyright (C) 2008-2009 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "filevercmp.h"
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <limits.h>
+#include <ctype.h>
+
+/* Match a file suffix defined by this regular expression:
+ /(\.[A-Za-z~][A-Za-z0-9~]*)*$/
+ Scan the string *STR and return a pointer to the matching suffix, or
+ NULL if not found. Upon return, *STR points to terminating NUL. */
+static const char *
+match_suffix (const char **str)
+{
+ const char *match = NULL;
+ bool read_alpha = false;
+ while (**str)
+ {
+ if (read_alpha)
+ {
+ read_alpha = false;
+ if (!isalpha (**str) && '~' != **str)
+ match = NULL;
+ }
+ else if ('.' == **str)
+ {
+ read_alpha = true;
+ if (!match)
+ match = *str;
+ }
+ else if (!isalnum (**str) && '~' != **str)
+ match = NULL;
+ (*str)++;
+ }
+ return match;
+}
+
+/* verrevcmp helper function */
+static inline int
+order (unsigned char c)
+{
+ if (isdigit (c))
+ return 0;
+ else if (isalpha (c))
+ return c;
+ else if (c == '~')
+ return -1;
+ else
+ return (int) c + UCHAR_MAX + 1;
+}
+
+/* slightly modified verrevcmp function from dpkg
+ S1, S2 - compared string
+ S1_LEN, S2_LEN - length of strings to be scanned
+
+ This implements the algorithm for comparison of version strings
+ specified by Debian and now widely adopted. The detailed
+ specification can be found in the Debian Policy Manual in the
+ section on the `Version' control field. This version of the code
+ implements that from s5.6.12 of Debian Policy v3.8.0.1
+ http://www.debian.org/doc/debian-policy/ch-controlfields.html#s-f-Version */
+static int
+verrevcmp (const char *s1, size_t s1_len, const char *s2, size_t s2_len)
+{
+ size_t s1_pos = 0;
+ size_t s2_pos = 0;
+ while (s1_pos < s1_len || s2_pos < s2_len)
+ {
+ int first_diff = 0;
+ while ((s1_pos < s1_len && !isdigit (s1[s1_pos]))
+ || (s2_pos < s2_len && !isdigit (s2[s2_pos])))
+ {
+ int s1_c = (s1_pos == s1_len) ? 0 : order (s1[s1_pos]);
+ int s2_c = (s2_pos == s2_len) ? 0 : order (s2[s2_pos]);
+ if (s1_c != s2_c)
+ return s1_c - s2_c;
+ s1_pos++;
+ s2_pos++;
+ }
+ while (s1[s1_pos] == '0')
+ s1_pos++;
+ while (s2[s2_pos] == '0')
+ s2_pos++;
+ while (isdigit (s1[s1_pos]) && isdigit (s2[s2_pos]))
+ {
+ if (!first_diff)
+ first_diff = s1[s1_pos] - s2[s2_pos];
+ s1_pos++;
+ s2_pos++;
+ }
+ if (isdigit (s1[s1_pos]))
+ return 1;
+ if (isdigit (s2[s2_pos]))
+ return -1;
+ if (first_diff)
+ return first_diff;
+ }
+ return 0;
+}
+
+/* Compare version strings S1 and S2.
+ See filevercmp.h for function description. */
+int
+filevercmp (const char *s1, const char *s2)
+{
+ const char *s1_pos;
+ const char *s2_pos;
+ const char *s1_suffix, *s2_suffix;
+ size_t s1_len, s2_len;
+ int result;
+
+ /* easy comparison to see if strings are identical */
+ int simple_cmp = strcmp (s1, s2);
+ if (simple_cmp == 0)
+ return 0;
+
+ /* special handle for "", "." and ".." */
+ if (!*s1)
+ return -1;
+ if (!*s2)
+ return 1;
+ if (0 == strcmp (".", s1))
+ return -1;
+ if (0 == strcmp (".", s2))
+ return 1;
+ if (0 == strcmp ("..", s1))
+ return -1;
+ if (0 == strcmp ("..", s2))
+ return 1;
+
+ /* special handle for other hidden files */
+ if (*s1 == '.' && *s2 != '.')
+ return -1;
+ if (*s1 != '.' && *s2 == '.')
+ return 1;
+ if (*s1 == '.' && *s2 == '.')
+ {
+ s1++;
+ s2++;
+ }
+
+ /* "cut" file suffixes */
+ s1_pos = s1;
+ s2_pos = s2;
+ s1_suffix = match_suffix (&s1_pos);
+ s2_suffix = match_suffix (&s2_pos);
+ s1_len = (s1_suffix ? s1_suffix : s1_pos) - s1;
+ s2_len = (s2_suffix ? s2_suffix : s2_pos) - s2;
+
+ /* restore file suffixes if strings are identical after "cut" */
+ if ((s1_suffix || s2_suffix) && (s1_len == s2_len)
+ && 0 == strncmp (s1, s2, s1_len))
+ {
+ s1_len = s1_pos - s1;
+ s2_len = s2_pos - s2;
+ }
+
+ result = verrevcmp (s1, s1_len, s2, s2_len);
+ return result == 0 ? simple_cmp : result;
+}