Messages in this thread Patch in this message | | | Date | Tue, 2 Jun 2009 01:45:34 GMT | From | tip-bot for Arnaldo Carvalho de Melo <> | Subject | [tip:perfcounters/core] perf_counter tools: Add string.[ch] |
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Commit-ID: ea5cc87c63b49c133d15ec2911bb2e49e8124516 Gitweb: http://git.kernel.org/tip/ea5cc87c63b49c133d15ec2911bb2e49e8124516 Author: Arnaldo Carvalho de Melo <acme@redhat.com> AuthorDate: Mon, 1 Jun 2009 22:31:03 -0300 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Tue, 2 Jun 2009 03:40:42 +0200
perf_counter tools: Add string.[ch]
Add hex conversion libraries. We are going to replace sscanf() uses with them.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
--- Documentation/perf_counter/util/string.c | 34 ++++++++++++++++++++++++++++++ Documentation/perf_counter/util/string.h | 8 +++++++ 2 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/Documentation/perf_counter/util/string.c b/Documentation/perf_counter/util/string.c new file mode 100644 index 0000000..ec33c0c --- /dev/null +++ b/Documentation/perf_counter/util/string.c @@ -0,0 +1,34 @@ +#include "string.h" + +static int hex(char ch) +{ + if ((ch >= '0') && (ch <= '9')) + return ch - '0'; + if ((ch >= 'a') && (ch <= 'f')) + return ch - 'a' + 10; + if ((ch >= 'A') && (ch <= 'F')) + return ch - 'A' + 10; + return -1; +} + +/* + * While we find nice hex chars, build a long_val. + * Return number of chars processed. + */ +int hex2u64(const char *ptr, __u64 *long_val) +{ + const char *p = ptr; + *long_val = 0; + + while (*p) { + const int hex_val = hex(*p); + + if (hex_val < 0) + break; + + *long_val = (*long_val << 4) | hex_val; + p++; + } + + return p - ptr; +} diff --git a/Documentation/perf_counter/util/string.h b/Documentation/perf_counter/util/string.h new file mode 100644 index 0000000..72812c1 --- /dev/null +++ b/Documentation/perf_counter/util/string.h @@ -0,0 +1,8 @@ +#ifndef _PERF_STRING_H_ +#define _PERF_STRING_H_ + +#include <linux/types.h> + +int hex2u64(const char *ptr, __u64 *val); + +#endif
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