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-rw-r--r--runtime/syntax/hex.vim89
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diff --git a/runtime/syntax/hex.vim b/runtime/syntax/hex.vim
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+" Vim syntax file
+" Language: Intel HEX
+" Maintainer: Markus Heidelberg <markus.heidelberg@web.de>
+" Previous version: Sams Ricahrd <sams@ping.at>
+" Last Change: 2015 Feb 24
+
+" Each record (line) is built as follows:
+"
+" field digits states
+"
+" +----------+
+" | start | 1 (':') hexRecStart
+" +----------+
+" | count | 2 hexDataByteCount
+" +----------+
+" | address | 4 hexNoAddress, hexDataAddress, (hexAddressFieldUnknown)
+" +----------+
+" | type | 2 hexRecType, (hexRecTypeUnknown)
+" +----------+
+" | data | 0..510 hexDataOdd, hexDataEven, hexExtendedAddress, hexStartAddress, (hexDataFieldUnknown, hexDataUnexpected)
+" +----------+
+" | checksum | 2 hexChecksum
+" +----------+
+"
+" States in parentheses in the upper format description indicate that they
+" should not appear in a valid file.
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+ finish
+endif
+
+syn match hexRecStart "^:"
+
+syn match hexDataByteCount "^:[0-9a-fA-F]\{2}" contains=hexRecStart nextgroup=hexAddress
+
+syn match hexAddress "[0-9a-fA-F]\{4}" transparent contained nextgroup=hexRecTypeUnknown,hexRecType
+" The address field groups include the record type field in the last 2
+" characters, the proper match for highlighting follows below.
+syn match hexAddressFieldUnknown "^:[0-9a-fA-F]\{8}" contains=hexDataByteCount nextgroup=hexDataFieldUnknown,hexChecksum
+syn match hexDataAddress "^:[0-9a-fA-F]\{6}00" contains=hexDataByteCount nextgroup=hexDataOdd,hexChecksum
+syn match hexNoAddress "^:[0-9a-fA-F]\{6}01" contains=hexDataByteCount nextgroup=hexDataUnexpected,hexChecksum
+syn match hexNoAddress "^:[0-9a-fA-F]\{6}0[24]" contains=hexDataByteCount nextgroup=hexExtendedAddress
+syn match hexNoAddress "^:[0-9a-fA-F]\{6}0[35]" contains=hexDataByteCount nextgroup=hexStartAddress
+
+syn match hexRecTypeUnknown "[0-9a-fA-F]\{2}" contained
+syn match hexRecType "0[0-5]" contained
+
+syn match hexDataFieldUnknown "[0-9a-fA-F]\{2}" contained nextgroup=hexDataFieldUnknown,hexChecksum
+" alternating highlight per byte for easier reading
+syn match hexDataOdd "[0-9a-fA-F]\{2}" contained nextgroup=hexDataEven,hexChecksum
+syn match hexDataEven "[0-9a-fA-F]\{2}" contained nextgroup=hexDataOdd,hexChecksum
+" data bytes which should not exist
+syn match hexDataUnexpected "[0-9a-fA-F]\{2}" contained nextgroup=hexDataUnexpected,hexChecksum
+" Data digit pair regex usage also results in only highlighting the checksum
+" if the number of data characters is even.
+
+" special data fields
+syn match hexExtendedAddress "[0-9a-fA-F]\{4}" contained nextgroup=hexDataUnexpected,hexChecksum
+syn match hexStartAddress "[0-9a-fA-F]\{8}" contained nextgroup=hexDataUnexpected,hexChecksum
+
+syn match hexChecksum "[0-9a-fA-F]\{2}$" contained
+
+" Folding Data Records below an Extended Segment/Linear Address Record
+syn region hexExtAdrBlock start="^:[0-9a-fA-F]\{7}[24]" skip="^:[0-9a-fA-F]\{7}0" end="^:"me=s-1 fold transparent
+
+" Define the default highlighting.
+" Only when an item doesn't have highlighting yet
+
+" The default methods for highlighting. Can be overridden later
+hi def link hexRecStart hexRecType
+hi def link hexDataByteCount Constant
+hi def hexAddressFieldUnknown term=italic cterm=italic gui=italic
+hi def link hexDataAddress Comment
+hi def link hexNoAddress DiffAdd
+hi def link hexRecTypeUnknown hexRecType
+hi def link hexRecType WarningMsg
+hi def hexDataFieldUnknown term=italic cterm=italic gui=italic
+hi def hexDataOdd term=bold cterm=bold gui=bold
+hi def hexDataEven term=NONE cterm=NONE gui=NONE
+hi def link hexDataUnexpected Error
+hi def link hexExtendedAddress hexDataAddress
+hi def link hexStartAddress hexDataAddress
+hi def link hexChecksum DiffChange
+
+
+let b:current_syntax = "hex"
+
+" vim: ts=8