diff options
Diffstat (limited to 'include/qemu')
| -rw-r--r-- | include/qemu/range.h | 20 | ||||
| -rw-r--r-- | include/qemu/typedefs.h | 1 |
2 files changed, 20 insertions, 1 deletions
diff --git a/include/qemu/range.h b/include/qemu/range.h index b76cc0df09..aae9720161 100644 --- a/include/qemu/range.h +++ b/include/qemu/range.h @@ -2,6 +2,7 @@ #define QEMU_RANGE_H #include <inttypes.h> +#include <qemu/typedefs.h> /* * Operations on 64 bit address ranges. @@ -15,7 +16,24 @@ struct Range { uint64_t begin; /* First byte of the range, or 0 if empty. */ uint64_t end; /* 1 + the last byte. 0 if range empty or ends at ~0x0LL. */ }; -typedef struct Range Range; + +static inline void range_extend(Range *range, Range *extend_by) +{ + if (!extend_by->begin && !extend_by->end) { + return; + } + if (!range->begin && !range->end) { + *range = *extend_by; + return; + } + if (range->begin > extend_by->begin) { + range->begin = extend_by->begin; + } + /* Compare last byte in case region ends at ~0x0LL */ + if (range->end - 1 < extend_by->end - 1) { + range->end = extend_by->end; + } +} /* Get last byte of a range from offset + length. * Undefined for ranges that wrap around 0. */ diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h index 3205540059..a4c1b84d69 100644 --- a/include/qemu/typedefs.h +++ b/include/qemu/typedefs.h @@ -68,5 +68,6 @@ typedef struct QEMUSGList QEMUSGList; typedef struct SHPCDevice SHPCDevice; typedef struct FWCfgState FWCfgState; typedef struct PcGuestInfo PcGuestInfo; +typedef struct Range Range; #endif /* QEMU_TYPEDEFS_H */ |