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| author | Sebastian Leske <sebastian.leske@sleske.name> | 2015-11-12 18:10:36 +0100 |
|---|---|---|
| committer | Sebastian Leske <sebastian.leske@sleske.name> | 2015-11-14 00:34:06 +0100 |
| commit | b1c61538efd863473ce1fa1b3a8effd59b48e219 (patch) | |
| tree | 394a225536559b0dbb101199a032344e11e7658c /navit/attr.h | |
| parent | 655d54922f552ffc493ef5f24d8351ed21d25c0a (diff) | |
| download | navit-b1c61538efd863473ce1fa1b3a8effd59b48e219.tar.gz | |
Refactor:Add comments and #defines for relative attribute values.
Diffstat (limited to 'navit/attr.h')
| -rw-r--r-- | navit/attr.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/navit/attr.h b/navit/attr.h index 6835f6ef2..27b37be60 100644 --- a/navit/attr.h +++ b/navit/attr.h @@ -97,9 +97,24 @@ enum attr_format { #define AF_DG_EXPLOSIVE (1<<2) #define AF_DG_FLAMMABLE (1<<3) -/* Values for attributes that could carry relative values */ -#define ATTR_REL_MAXABS 0x40000000 -#define ATTR_REL_RELSHIFT 0x60000000 +/* + * Values for attributes that could carry relative values. + * Some attributes allow both absolute and relative values. The value for these + * attributes is stored as an int. Absolute values are stored as-is, relative + * values are stored shifted by adding ATTR_REL_RELSHIFT. + */ +/** Minimum value for an absolute attribute value. */ +#define ATTR_REL_MINABS -0x40000000 +/** Maximum value for an absolute attribute value. */ +#define ATTR_REL_MAXABS 0x40000000 +/** Minimum value for an relative attribute value (without value shift). */ +#define ATTR_REL_MINREL -0x1FFFFFFF +/** Maximum value for an relative attribute value (without value shift). */ +#define ATTR_REL_MAXREL 0x20000000 +/** + * Value shift for relative values. This value is added to an attribute values to indicate + * a relative value. */ +#define ATTR_REL_RELSHIFT 0x60000000 /** Indicates whether a position is valid **/ enum attr_position_valid { |