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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/SLOF/lib/libc/stdlib/strtoul.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/SLOF/lib/libc/stdlib/strtoul.c')
-rw-r--r-- | qemu/roms/SLOF/lib/libc/stdlib/strtoul.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/lib/libc/stdlib/strtoul.c b/qemu/roms/SLOF/lib/libc/stdlib/strtoul.c new file mode 100644 index 000000000..754e7db4b --- /dev/null +++ b/qemu/roms/SLOF/lib/libc/stdlib/strtoul.c @@ -0,0 +1,105 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#include <stdlib.h> + +unsigned long int strtoul(const char *S, char **PTR,int BASE) +{ + unsigned long rval = 0; + short int digit; + // *PTR is S, unless PTR is NULL, in which case i override it with my own ptr + char* ptr; + if (PTR == 0) + { + //override + PTR = &ptr; + } + // i use PTR to advance through the string + *PTR = (char *) S; + //check if BASE is ok + if ((BASE < 0) || BASE > 36) + { + return 0; + } + // ignore white space at beginning of S + while ((**PTR == ' ') + || (**PTR == '\t') + || (**PTR == '\n') + || (**PTR == '\r') + ) + { + (*PTR)++; + } + // if BASE is 0... determine the base from the first chars... + if (BASE == 0) + { + // if S starts with "0x", BASE = 16, else 10 + if ((**PTR == '0') && (*((*PTR)+1) == 'x')) + { + BASE = 16; + (*PTR)++; + (*PTR)++; + } + else + { + BASE = 10; + } + } + if (BASE == 16) + { + // S may start with "0x" + if ((**PTR == '0') && (*((*PTR)+1) == 'x')) + { + (*PTR)++; + (*PTR)++; + } + } + //until end of string + while (**PTR) + { + if (((**PTR) >= '0') && ((**PTR) <='9')) + { + //digit (0..9) + digit = **PTR - '0'; + } + else if (((**PTR) >= 'a') && ((**PTR) <='z')) + { + //alphanumeric digit lowercase(a (10) .. z (35) ) + digit = (**PTR - 'a') + 10; + } + else if (((**PTR) >= 'A') && ((**PTR) <='Z')) + { + //alphanumeric digit uppercase(a (10) .. z (35) ) + digit = (**PTR - 'A') + 10; + } + else + { + //end of parseable number reached... + break; + } + if (digit < BASE) + { + rval = (rval * BASE) + digit; + } + else + { + //digit found, but its too big for current base + //end of parseable number reached... + break; + } + //next... + (*PTR)++; + } + //done + return rval; +} + |