38 #include "localeimpl.h"
39 #include "collate.h"
40
41 #define ALLOCA_LIMIT 16
42
43 /*
44 * In order to properly handle multibyte locales, its easiet to just
45 * convert to wide characters and then use wcscoll. However if an
46 * error occurs, we gracefully fall back to simple strcmp. Caller
47 * should check errno.
48 */
49 int
50 strcoll_l(const char *s1, const char *s2, locale_t loc)
51 {
52 int ret;
53 wchar_t *t1 = NULL, *t2 = NULL;
54 wchar_t *w1 = NULL, *w2 = NULL;
55 size_t sz1, sz2;
56 const struct lc_collate *lcc = loc->collate;
57
58 mbstate_t mbs1 = { 0 }; /* initial states */
59 mbstate_t mbs2 = { 0 };
60
61 if (lcc->lc_is_posix)
62 return (strcmp(s1, s2));
63
64 sz1 = strlen(s1) + 1;
65 sz2 = strlen(s2) + 1;
66
67 /*
68 * Simple assumption: conversion to wide format is strictly
69 * reducing, i.e. a single byte (or multibyte character)
70 * cannot result in multiple wide characters.
71 *
72 * We gain a bit of performance by giving preference to alloca
73 * for small string allocations.
74 */
75 if (sz1 > ALLOCA_LIMIT) {
76 if ((t1 = malloc(sz1 * sizeof (wchar_t))) == NULL)
77 goto error;
78 w1 = t1;
79 } else {
80 if ((w1 = alloca(sz1 * sizeof (wchar_t))) == NULL)
81 goto error;
82 }
83 if (sz2 > ALLOCA_LIMIT) {
84 if ((t2 = malloc(sz2 * sizeof (wchar_t))) == NULL)
85 goto error;
86 w2 = t2;
87 } else {
88 if ((w2 = alloca(sz2 * sizeof (wchar_t))) == NULL)
89 goto error;
90 }
91
92 if ((mbsrtowcs_l(w1, &s1, sz1, &mbs1, loc)) == (size_t)-1)
93 goto error;
94
95 if ((mbsrtowcs_l(w2, &s2, sz2, &mbs2, loc)) == (size_t)-1)
96 goto error;
97
98 ret = wcscoll_l(w1, w2, loc);
99 if (t1)
100 free(t1);
101 if (t2)
102 free(t2);
103
104 return (ret);
105
106 error:
107 if (t1)
108 free(t1);
109 if (t2)
110 free(t2);
111 return (strcmp(s1, s2));
112 }
113
114 int
115 strcoll(const char *s1, const char *s2)
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38 #include "localeimpl.h"
39 #include "collate.h"
40
41 #define ALLOCA_LIMIT 16
42
43 /*
44 * In order to properly handle multibyte locales, its easiet to just
45 * convert to wide characters and then use wcscoll. However if an
46 * error occurs, we gracefully fall back to simple strcmp. Caller
47 * should check errno.
48 */
49 int
50 strcoll_l(const char *s1, const char *s2, locale_t loc)
51 {
52 int ret;
53 wchar_t *t1 = NULL, *t2 = NULL;
54 wchar_t *w1 = NULL, *w2 = NULL;
55 size_t sz1, sz2;
56 const struct lc_collate *lcc = loc->collate;
57
58 if (lcc->lc_is_posix)
59 return (strcmp(s1, s2));
60
61 sz1 = strlen(s1) + 1;
62 sz2 = strlen(s2) + 1;
63
64 /*
65 * Simple assumption: conversion to wide format is strictly
66 * reducing, i.e. a single byte (or multibyte character)
67 * cannot result in multiple wide characters.
68 *
69 * We gain a bit of performance by giving preference to alloca
70 * for small string allocations.
71 */
72 if (sz1 > ALLOCA_LIMIT) {
73 if ((t1 = malloc(sz1 * sizeof (wchar_t))) == NULL)
74 goto error;
75 w1 = t1;
76 } else {
77 if ((w1 = alloca(sz1 * sizeof (wchar_t))) == NULL)
78 goto error;
79 }
80 if (sz2 > ALLOCA_LIMIT) {
81 if ((t2 = malloc(sz2 * sizeof (wchar_t))) == NULL)
82 goto error;
83 w2 = t2;
84 } else {
85 if ((w2 = alloca(sz2 * sizeof (wchar_t))) == NULL)
86 goto error;
87 }
88
89 if ((mbstowcs_l(w1, s1, sz1, loc)) == (size_t)-1)
90 goto error;
91
92 if ((mbstowcs_l(w2, s2, sz2, loc)) == (size_t)-1)
93 goto error;
94
95 ret = wcscoll_l(w1, w2, loc);
96 if (t1)
97 free(t1);
98 if (t2)
99 free(t2);
100
101 return (ret);
102
103 error:
104 if (t1)
105 free(t1);
106 if (t2)
107 free(t2);
108 return (strcmp(s1, s2));
109 }
110
111 int
112 strcoll(const char *s1, const char *s2)
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