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Ignore punctuation marks in file name compare. Fix xstrcmp().

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1. File name comparison method:
 - initially ignore white space and punctuation characters
 - run test for numeric values
 - if the remaining substrings match in case-insensitive compare, compare case
 - if they still match, see which one has more prefix symbols
 - if they still match, run a case-sensitive compare on complete strings

2. Fixed xstrcmp() to return diff instead of 0 and -1.
This commit is contained in:
Arun Prakash Jana 2017-12-21 17:49:31 +05:30
parent 6f4ab8e3da
commit 988a3dd621
No known key found for this signature in database
GPG key ID: A75979F35C080412
1 changed files with 33 additions and 16 deletions
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nnn.c
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@ -405,7 +405,7 @@ xstrlcpy(char *dest, const char *src, size_t n)
/*
* Custom strcmp(), just what we need.
* Returns 0 if same, else -1
* Returns 0 if same, -ve if s1 < s2, +ve if s1 > s2.
*/
static int
xstrcmp(const char *s1, const char *s2)
@ -416,10 +416,7 @@ xstrcmp(const char *s1, const char *s2)
while (*s1 && *s1 == *s2)
++s1, ++s2;
if (*s1 != *s2)
return -1;
return 0;
return *s1 - *s2;
}
/*
@ -646,25 +643,30 @@ xdiraccess(char *path)
static int
xstricmp(char *s1, char *s2)
{
static char *c1, *c2;
static char *str1, *str2, *c1, *c2;
static int diff, nsyms1, nsyms2;
c1 = s1;
while (isspace(*c1))
++c1;
str1 = c1 = s1;
nsyms1 = 0;
while (isspace(*c1) || ispunct(*c1)) /* Same weight to spaces and punctuations */
++nsyms1, ++c1;
if (*c1 == '-' || *c1 == '+')
++c1;
while (*c1 >= '0' && *c1 <= '9')
++c1;
c2 = s2;
while (isspace(*c2))
++c2;
str2 = c2 = s2;
nsyms2 = 0;
while (isspace(*c2) || ispunct(*c2))
++nsyms2, ++c2;
if (*c2 == '-' || *c2 == '+')
++c2;
while (*c2 >= '0' && *c2 <= '9')
++c2;
if (*c1 == '\0' && *c2 == '\0') {
if (*c1 && *c2)
s1 = c1, s2 = c2;
else if (*c1 == '\0' && *c2 == '\0') {
static long long num1, num2;
num1 = strtoll(s1, &c1, 10);
@ -675,6 +677,8 @@ xstricmp(char *s1, char *s2)
else
return -1;
}
*c1 = 0, *c2 = 0;
} else if (*c1 == '\0' && *c2 != '\0')
return -1;
else if (*c1 != '\0' && *c2 == '\0')
@ -686,8 +690,21 @@ xstricmp(char *s1, char *s2)
/* In case of alphabetically same names, make sure
* lower case one comes before upper case one
*/
if (!*s1 && !*s2)
return 1;
if (!*s1 && !*s2) {
/* First compare ignoring symbols */
if (*c1 && *c2) {
diff = xstrcmp(c1, c2);
if (diff != 0)
return -diff;
}
/* Sort the string with lesser prefix symbols on top */
if (nsyms1 != nsyms2)
return (nsyms1 - nsyms2);
/* Same number of symbols in both strings */
return -xstrcmp(str1, str2);
}
return (int) (TOUPPER(*s1) - TOUPPER(*s2));
}
@ -2508,7 +2525,7 @@ nochange:
break;
for (r = 0; bookmark[r].key && r < BM_MAX; ++r) {
if (xstrcmp(bookmark[r].key, tmp) == -1)
if (xstrcmp(bookmark[r].key, tmp) != 0)
continue;
if (bookmark[r].loc[0] == '~') {