4 * Copyright (C) 2001, 2002, 2003, 2005, 2007, 2012 Imagination Technologies.
6 * This program is free software; you can redistribute it and/or modify it under
7 * the terms of the GNU General Public License version 2 as published by the
8 * Free Software Foundation.
10 * String table functions provided as part of the thread binary interface for
14 #include <linux/export.h>
15 #include <linux/string.h>
19 * There are not any functions to modify the string table currently, if these
20 * are required at some later point I suggest having a seperate module and
21 * ensuring that creating new entries does not interfere with reading old
25 const TBISTR *__TBIFindStr(const TBISTR *start,
26 const char *str, int match_len)
28 const TBISTR *search = start;
33 /* Make match_len always positive for the inner loop */
34 match_len = -match_len;
38 * Also support historic behaviour, which expected match_len to
39 * include null terminator
41 if (match_len && str[match_len-1] == '\0')
46 /* Find global string table segment */
47 seg = __TBIFindSeg(NULL, TBID_SEG(TBID_THREAD_GLOBAL,
49 TBID_SEGTYPE_STRING));
51 if (!seg || seg->Bytes < sizeof(TBISTR))
52 /* No string table! */
55 /* Start of string table */
61 /* Allow simple gaps which are just zero initialised */
62 search = (const TBISTR *)((const char *)search + 8);
64 if (search->Tag == METAG_TBI_STRE) {
65 /* Reached the end of the table */
70 if ((search->Len >= match_len) &&
71 (!exact || (search->Len == match_len + 1)) &&
72 (search->Tag != METAG_TBI_STRG)) {
74 if (!strncmp(str, (const char *)search->String,
80 search = (const TBISTR *)((const char *)search + search->Bytes);
86 const void *__TBITransStr(const char *str, int len)
88 const TBISTR *search = NULL;
89 const void *res = NULL;
93 search = __TBIFindStr(search, str, len);
95 /* No translation returns NULL */
99 /* Skip matching entries with no translation data */
100 if (search->TransLen != METAG_TBI_STRX) {
101 /* Calculate base of translation string */
102 res = (const char *)search->String +
103 ((search->Len + 7) & ~7);
108 search = (const TBISTR *)((const char *)search + search->Bytes);
111 /* Return base address of translation data or NULL */
114 EXPORT_SYMBOL(__TBITransStr);