diff options
Diffstat (limited to 'drivers/staging/unisys/include/guidutils.h')
| -rw-r--r-- | drivers/staging/unisys/include/guidutils.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/drivers/staging/unisys/include/guidutils.h b/drivers/staging/unisys/include/guidutils.h new file mode 100644 index 000000000000..75caf929cd6d --- /dev/null +++ b/drivers/staging/unisys/include/guidutils.h @@ -0,0 +1,203 @@ +/* Copyright © 2010 - 2013 UNISYS CORPORATION + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +/* guidutils.h + * + * These are GUID manipulation inlines that can be used from either + * kernel-mode or user-mode. + * + */ +#ifndef __GUIDUTILS_H__ +#define __GUIDUTILS_H__ + +#ifdef __KERNEL__ +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/ctype.h> +#define GUID_STRTOUL kstrtoul +#else +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include <stdlib.h> + +#define GUID_STRTOUL strtoul +#endif + +static inline char * +GUID_format1(const GUID *guid, char *s) +{ + sprintf(s, "{%-8.8lx-%-4.4x-%-4.4x-%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x}", + (ulong) guid->data1, + guid->data2, + guid->data3, + guid->data4[0], + guid->data4[1], + guid->data4[2], + guid->data4[3], + guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]); + return s; +} + +/** Format a GUID in Microsoft's 'what in the world were they thinking' + * format. + */ +static inline char * +GUID_format2(const GUID *guid, char *s) +{ + sprintf(s, "{%-8.8lx-%-4.4x-%-4.4x-%-2.2x%-2.2x-%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x%-2.2x}", + (ulong) guid->data1, + guid->data2, + guid->data3, + guid->data4[0], + guid->data4[1], + guid->data4[2], + guid->data4[3], + guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]); + return s; +} + +/** + * Like GUID_format2 but without the curly braces and the + * hex digits in upper case + */ +static inline char * +GUID_format3(const GUID *guid, char *s) +{ + sprintf(s, "%-8.8lX-%-4.4X-%-4.4X-%-2.2X%-2.2X-%-2.2X%-2.2X%-2.2X%-2.2X%-2.2X%-2.2X", + (ulong) guid->data1, + guid->data2, + guid->data3, + guid->data4[0], + guid->data4[1], + guid->data4[2], + guid->data4[3], + guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]); + return s; +} + +/** Parse a guid string in any of these forms: + * {11111111-2222-3333-4455-66778899aabb} + * {11111111-2222-3333-445566778899aabb} + * 11111111-2222-3333-4455-66778899aabb + * 11111111-2222-3333-445566778899aabb + */ +static inline GUID +GUID_scan(U8 *p) +{ + GUID guid = GUID0; + U8 x[33]; + int count = 0; + int c, i = 0; + U8 cdata1[9]; + U8 cdata2[5]; + U8 cdata3[5]; + U8 cdata4[3]; + int dashcount = 0; + int brace = 0; + unsigned long uldata; + + if (!p) + return guid; + if (*p == '{') { + p++; + brace = 1; + } + while (count < 32) { + if (*p == '}') + return guid; + if (*p == '\0') + return guid; + c = toupper(*p); + p++; + if (c == '-') { + switch (dashcount) { + case 0: + if (i != 8) + return guid; + break; + case 1: + if (i != 4) + return guid; + break; + case 2: + if (i != 4) + return guid; + break; + case 3: + if (i != 4) + return guid; + break; + default: + return guid; + } + dashcount++; + i = 0; + continue; + } + if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')) + i++; + else + return guid; + x[count++] = c; + } + x[count] = '\0'; + if (brace) { + if (*p == '}') + p++; + else + return guid; + } + if (dashcount == 3 || dashcount == 4) + ; + else + return guid; + memset(cdata1, 0, sizeof(cdata1)); + memset(cdata2, 0, sizeof(cdata2)); + memset(cdata3, 0, sizeof(cdata3)); + memset(cdata4, 0, sizeof(cdata4)); + memcpy(cdata1, x + 0, 8); + memcpy(cdata2, x + 8, 4); + memcpy(cdata3, x + 12, 4); + + if (GUID_STRTOUL((char *) cdata1, 16, &uldata) == 0) + guid.data1 = (U32)uldata; + if (GUID_STRTOUL((char *) cdata2, 16, &uldata) == 0) + guid.data2 = (U16)uldata; + if (GUID_STRTOUL((char *) cdata3, 16, &uldata) == 0) + guid.data3 = (U16)uldata; + + for (i = 0; i < 8; i++) { + memcpy(cdata4, x + 16 + (i * 2), 2); + if (GUID_STRTOUL((char *) cdata4, 16, &uldata) == 0) + guid.data4[i] = (U8) uldata; + } + + return guid; +} + +static inline char * +GUID_sanitize(char *inputGuidStr, char *outputGuidStr) +{ + GUID g; + GUID guid0 = GUID0; + *outputGuidStr = '\0'; + g = GUID_scan((U8 *) inputGuidStr); + if (memcmp(&g, &guid0, sizeof(GUID)) == 0) + return outputGuidStr; /* bad GUID format */ + return GUID_format1(&g, outputGuidStr); +} + +#endif |