Add support to print bitmap list. Code mostly taken from kernel's bitmap_list_string.
Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Jiri Olsa <[email protected]> --- tools/include/linux/bitmap.h | 10 ++++++++++ tools/lib/bitmap.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h index 66ddd992e690..43a0d06beabb 100644 --- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -75,4 +75,14 @@ static inline unsigned long *bitmap_alloc(int nbits) return malloc(BITS_TO_LONGS(nbits) * sizeof(unsigned long)); } +/** + * bitmap_snprintf - print bitmap list into buffer + * @bitmap: bitmap + * @nbits: size of bitmap + * @buf: buffer to store output + * @size: size of @buf + */ +size_t bitmap_snprintf(unsigned long *bitmap, int nbits, + char *buf, size_t size); + #endif /* _PERF_BITOPS_H */ diff --git a/tools/lib/bitmap.c b/tools/lib/bitmap.c index 0a1adc1111fd..184d97b276a1 100644 --- a/tools/lib/bitmap.c +++ b/tools/lib/bitmap.c @@ -29,3 +29,32 @@ void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1, for (k = 0; k < nr; k++) dst[k] = bitmap1[k] | bitmap2[k]; } + +size_t bitmap_snprintf(unsigned long *bitmap, int nbits, + char *buf, size_t size) +{ + /* current bit is 'cur', most recently seen range is [rbot, rtop] */ + int cur, rbot, rtop; + bool first = true; + size_t ret = 0; + + rbot = cur = find_first_bit(bitmap, nbits); + while (cur < nbits) { + rtop = cur; + cur = find_next_bit(bitmap, nbits, cur + 1); + if (cur < nbits && cur <= rtop + 1) + continue; + + if (!first) + ret += scnprintf(buf + ret, size - ret, ","); + + first = false; + + ret += scnprintf(buf + ret, size - ret, "%d", rbot); + if (rbot < rtop) + ret += scnprintf(buf + ret, size - ret, "-%d", rtop); + + rbot = cur; + } + return ret; +} -- 2.4.11
