mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-11-26 01:04:05 +02:00
114 lines
3.2 KiB
Diff
114 lines
3.2 KiB
Diff
--- alsa-lib-1.0.24.1.orig/src/ucm/parser.c 2011-03-13 21:17:10.405058674 +0300
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+++ alsa-lib-1.0.24.1/src/ucm/parser.c 2011-03-13 21:26:24.705183404 +0300
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@@ -32,6 +32,9 @@
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#include "ucm_local.h"
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#include <dirent.h>
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+#include <string.h>
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+#include <ctype.h>
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+#include <stdint.h>
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/** The name of the environment variable containing the UCM directory */
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#define ALSA_CONFIG_UCM_VAR "ALSA_CONFIG_UCM"
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@@ -40,6 +43,100 @@
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struct list_head *base,
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snd_config_t *cfg);
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+ /* states: S_N: normal, S_I: comparing integral part, S_F: comparing
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+ fractional parts, S_Z: idem but with leading Zeroes only */
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+ #define S_N 0x0
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+ #define S_I 0x4
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+ #define S_F 0x8
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+ #define S_Z 0xC
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+
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+ /* result_type: CMP: return diff; LEN: compare using len_diff/diff */
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+ #define CMP 2
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+ #define LEN 3
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+
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+ /* using more efficient isdigit() */
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+ #undef isdigit
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+ #define isdigit(a) ((unsigned)((a) - '0') <= 9)
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+
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+ /* Compare S1 and S2 as strings holding indices/version numbers,
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+ returning less than, equal to or greater than zero if S1 is less than,
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+ equal to or greater than S2 (for more info, see the texinfo doc).
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+ */
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+ int strverscmp (const char *s1, const char *s2)
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+ {
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+ const unsigned char *p1 = (const unsigned char *) s1;
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+ const unsigned char *p2 = (const unsigned char *) s2;
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+ unsigned char c1, c2;
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+ int state;
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+ int diff;
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+
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+ /* Symbol(s) 0 [1-9] others (padding)
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+ Transition (10) 0 (01) d (00) x (11) - */
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+ static const uint8_t next_state[] =
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+ {
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+ /* state x d 0 - */
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+ /* S_N */ S_N, S_I, S_Z, S_N,
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+ /* S_I */ S_N, S_I, S_I, S_I,
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+ /* S_F */ S_N, S_F, S_F, S_F,
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+ /* S_Z */ S_N, S_F, S_Z, S_Z
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+ };
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+
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+ static const int8_t result_type[] =
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+ {
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+ /* state x/x x/d x/0 x/- d/x d/d d/0 d/-
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+ 0/x 0/d 0/0 0/- -/x -/d -/0 -/- */
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+
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+ /* S_N */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
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+ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
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+ /* S_I */ CMP, -1, -1, CMP, +1, LEN, LEN, CMP,
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+ +1, LEN, LEN, CMP, CMP, CMP, CMP, CMP,
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+ /* S_F */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
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+ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
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+ /* S_Z */ CMP, +1, +1, CMP, -1, CMP, CMP, CMP,
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+ -1, CMP, CMP, CMP
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+ };
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+
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+ if (p1 == p2)
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+ return 0;
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+
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+ c1 = *p1++;
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+ c2 = *p2++;
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+ /* Hint: '0' is a digit too. */
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+ state = S_N | ((c1 == '0') + (isdigit (c1) != 0));
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+
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+ while ((diff = c1 - c2) == 0 && c1 != '\0')
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+ {
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+ state = next_state[state];
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+ c1 = *p1++;
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+ c2 = *p2++;
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+ state |= (c1 == '0') + (isdigit (c1) != 0);
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+ }
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+
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+ state = result_type[state << 2 | (((c2 == '0') + (isdigit (c2) != 0)))];
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+
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+ switch (state)
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+ {
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+ case CMP:
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+ return diff;
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+
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+ case LEN:
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+ while (isdigit (*p1++))
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+ if (!isdigit (*p2++))
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+ return 1;
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+
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+ return isdigit (*p2) ? -1 : diff;
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+
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+ default:
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+ return state;
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+ }
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+ }
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+
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+int versionsort(const void *a, const void *b)
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+{
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+ return strverscmp((*(const struct dirent **) a)->d_name,
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+ (*(const struct dirent **) b)->d_name);
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+}
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+
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/*
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* Parse string
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*/
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