Date:2011-05-10 17:52:50 (12 years 10 months ago)
Author:kyak
Commit:5d9fb4f046dcd96cb442b636d5dc4d3b3449b310
Message:alsa-lib: no need for this patch in trunk

Files: alsa-lib/patches/002-versionsort.patch (1 diff)

Change Details

alsa-lib/patches/002-versionsort.patch
1+++ alsa-lib-1.0.24.1/src/ucm/parser.c 2011-03-13 21:26:24.705183404 +0300
2@@ -32,6 +32,9 @@
3
4 #include "ucm_local.h"
5 #include <dirent.h>
6+#include <string.h>
7+#include <ctype.h>
8+#include <stdint.h>
9
10 /** The name of the environment variable containing the UCM directory */
11 #define ALSA_CONFIG_UCM_VAR "ALSA_CONFIG_UCM"
12@@ -40,6 +43,100 @@
13               struct list_head *base,
14               snd_config_t *cfg);
15
16+ /* states: S_N: normal, S_I: comparing integral part, S_F: comparing
17+ fractional parts, S_Z: idem but with leading Zeroes only */
18+ #define S_N 0x0
19+ #define S_I 0x4
20+ #define S_F 0x8
21+ #define S_Z 0xC
22+
23+ /* result_type: CMP: return diff; LEN: compare using len_diff/diff */
24+ #define CMP 2
25+ #define LEN 3
26+
27+ /* using more efficient isdigit() */
28+ #undef isdigit
29+ #define isdigit(a) ((unsigned)((a) - '0') <= 9)
30+
31+ /* Compare S1 and S2 as strings holding indices/version numbers,
32+ returning less than, equal to or greater than zero if S1 is less than,
33+ equal to or greater than S2 (for more info, see the texinfo doc).
34+ */
35+ int strverscmp (const char *s1, const char *s2)
36+ {
37+ const unsigned char *p1 = (const unsigned char *) s1;
38+ const unsigned char *p2 = (const unsigned char *) s2;
39+ unsigned char c1, c2;
40+ int state;
41+ int diff;
42+
43+ /* Symbol(s) 0 [1-9] others (padding)
44+ Transition (10) 0 (01) d (00) x (11) - */
45+ static const uint8_t next_state[] =
46+ {
47+ /* state x d 0 - */
48+ /* S_N */ S_N, S_I, S_Z, S_N,
49+ /* S_I */ S_N, S_I, S_I, S_I,
50+ /* S_F */ S_N, S_F, S_F, S_F,
51+ /* S_Z */ S_N, S_F, S_Z, S_Z
52+ };
53+
54+ static const int8_t result_type[] =
55+ {
56+ /* state x/x x/d x/0 x/- d/x d/d d/0 d/-
57+ 0/x 0/d 0/0 0/- -/x -/d -/0 -/- */
58+
59+ /* S_N */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
60+ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
61+ /* S_I */ CMP, -1, -1, CMP, +1, LEN, LEN, CMP,
62+ +1, LEN, LEN, CMP, CMP, CMP, CMP, CMP,
63+ /* S_F */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
64+ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
65+ /* S_Z */ CMP, +1, +1, CMP, -1, CMP, CMP, CMP,
66+ -1, CMP, CMP, CMP
67+ };
68+
69+ if (p1 == p2)
70+ return 0;
71+
72+ c1 = *p1++;
73+ c2 = *p2++;
74+ /* Hint: '0' is a digit too. */
75+ state = S_N | ((c1 == '0') + (isdigit (c1) != 0));
76+
77+ while ((diff = c1 - c2) == 0 && c1 != '\0')
78+ {
79+ state = next_state[state];
80+ c1 = *p1++;
81+ c2 = *p2++;
82+ state |= (c1 == '0') + (isdigit (c1) != 0);
83+ }
84+
85+ state = result_type[state << 2 | (((c2 == '0') + (isdigit (c2) != 0)))];
86+
87+ switch (state)
88+ {
89+ case CMP:
90+ return diff;
91+
92+ case LEN:
93+ while (isdigit (*p1++))
94+ if (!isdigit (*p2++))
95+ return 1;
96+
97+ return isdigit (*p2) ? -1 : diff;
98+
99+ default:
100+ return state;
101+ }
102+ }
103+
104+int versionsort(const void *a, const void *b)
105+{
106+ return strverscmp((*(const struct dirent **) a)->d_name,
107+ (*(const struct dirent **) b)->d_name);
108+}
109+
110 /*
111  * Parse string
112  */

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