blob: 32d973680fd5623fc2680650bd27994808e5ecb4 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
cmake_minimum_required(VERSION 3.10)
set(HEX_ALPHABET "0123456789abcdef")
function(ConvertToHex dec hex)
while(dec GREATER 0)
math(EXPR _val "${dec} % 16")
math(EXPR dec "${dec} / 16")
string(SUBSTRING ${HEX_ALPHABET} ${_val} 1 _val)
set(_res "${_val}${_res}")
endwhile()
# Pad the result with the number of zeros
# specified by the optional third argument
if(${ARGC} EQUAL 3)
set(padding ${ARGV2})
string(LENGTH ${_res} _resLen)
if(_resLen LESS ${padding})
math(EXPR _neededPadding "${padding} - ${_resLen}")
foreach(i RANGE 1 ${_neededPadding})
set(_res "0${_res}")
endforeach()
endif()
endif()
set(${hex} "0x${_res}" PARENT_SCOPE)
endfunction()
function(ConvertFromHex hex dec)
string(TOLOWER ${hex} hex)
string(LENGTH "${hex}" _strlen)
set(_res 0)
while(_strlen GREATER 0)
math(EXPR _res "${_res} * 16")
string(SUBSTRING "${hex}" 0 1 NIBBLE)
string(SUBSTRING "${hex}" 1 -1 hex)
string(FIND ${HEX_ALPHABET} ${NIBBLE} value)
if(value EQUAL -1)
message(FATAL_ERROR "Invalid hex character '${NIBBLE}'")
endif()
math(EXPR _res "${_res} + ${value}")
string(LENGTH "${hex}" _strlen)
endwhile()
set(${dec} ${_res} PARENT_SCOPE)
endfunction()
# Based on http://www.json.org/JSON_checker/utf8_decode.c
function(DecodeUtf8 hexBytes codePoint)
string(SUBSTRING ${hexBytes} 0 2 hexByte1)
ConvertFromHex(${hexByte1} byte1)
# Zero continuations (0 to 127)
math(EXPR out "${byte1} & 128")
if(out EQUAL 0)
set(${codePoint} ${byte1} PARENT_SCOPE)
return()
endif()
# One continuation (128 to 2047)
math(EXPR out "${byte1} & 224")
if(out EQUAL 192)
string(SUBSTRING ${hexBytes} 2 2 hexByte2)
ConvertFromHex(${hexByte2} byte2)
math(EXPR result "((${byte1} & 31) << 6) | ${byte2}")
if(result GREATER 127)
set(${codePoint} ${result} PARENT_SCOPE)
return()
endif()
else()
# Two continuations (2048 to 55295 and 57344 to 65535)
math(EXPR result "${byte1} & 240")
if(result EQUAL 224)
string(SUBSTRING ${hexBytes} 2 2 hexByte2)
string(SUBSTRING ${hexBytes} 4 2 hexByte3)
ConvertFromHex(${hexByte2} byte2)
ConvertFromHex(${hexByte3} byte3)
math(EXPR result "${byte2} | ${byte3}")
if(result GREATER -1)
math(EXPR result "((${byte1} & 15) << 12) | (${byte2} << 6) | ${byte3}")
if((result GREATER 2047) AND (result LESS 55296 OR result GREATER 57343))
set(${codePoint} ${result} PARENT_SCOPE)
return()
endif()
endif()
else()
# Three continuations (65536 to 1114111)
math(EXPR result "${byte1} & 248")
if(result EQUAL 224)
string(SUBSTRING ${hexBytes} 2 2 hexByte2)
string(SUBSTRING ${hexBytes} 4 2 hexByte3)
string(SUBSTRING ${hexBytes} 6 2 hexByte4)
ConvertFromHex(${hexByte2} byte2)
ConvertFromHex(${hexByte3} byte3)
ConvertFromHex(${hexByte4} byte4)
math(EXPR result "${byte2} | ${byte3} | ${byte4}")
if(result GREATER -1)
math(EXPR result "((c & 7) << 18) | (c1 << 12) | (c2 << 6) | c3")
if((result GREATER 65535) AND (result LESS 1114112))
set(${codePoint} ${result} PARENT_SCOPE)
return()
endif()
endif()
endif()
endif()
endif()
message(FATAL_ERROR "Invalid UTF-8 encoding")
endfunction()
set(inputFile ${CMAKE_ARGV3})
set(outputFile ${CMAKE_ARGV4})
# Get the file contents in text and hex-encoded format because
# CMake doesn't provide functions for converting between the two
file(READ "${inputFile}" contents)
file(READ "${inputFile}" hexContents HEX)
# Convert the text contents into a list of lines by escaping
# the list separator ';' and then replacing new line characters
# with the list separator
string(REGEX REPLACE ";" "\\\\;" contents ${contents})
string(REGEX REPLACE "\n" ";" contents ${contents})
get_filename_component(encname ${inputFile} NAME_WE)
set(output
"static const struct StaticTableEncoding encoding_${encname} = {\n"
" { .decode = &decode_table },\n"
" {")
set(hexIndex 0)
foreach(line ${contents})
string(LENGTH ${line} lineLength)
# Convert "A" to 0x41
string(FIND ${line} "\"" beginQuote)
if(NOT ${beginQuote} EQUAL -1)
string(FIND ${line} "\"" endQuote REVERSE)
if(${beginQuote} EQUAL ${endQuote})
message(FATAL_ERROR "Line contains only one quote")
endif()
math(EXPR beginHexQuote "${hexIndex} + (${beginQuote} + 1)*2")
math(EXPR endHexQuote "${hexIndex} + (${endQuote} + 1)*2")
math(EXPR quoteLen "${endHexQuote} - ${beginHexQuote} - 1")
string(SUBSTRING ${hexContents} ${beginHexQuote} ${quoteLen} hexQuote)
DecodeUtf8(${hexQuote} codePoint)
ConvertToHex(${codePoint} hexCodePoint 4)
STRING(REGEX REPLACE "\"(.+)\"" ${hexCodePoint} line ${line})
endif()
# Strip comment
string(REGEX REPLACE "[ \t\n]*#.*" "" line ${line})
# Convert 3/1 to [0x31]
string(REGEX REPLACE "^([0-9]+)/([0-9]+).*" "\\1;\\2" numbers ${line})
list(GET numbers 0 upperBits)
list(GET numbers 1 lowerBits)
math(EXPR res "${upperBits}*16 + ${lowerBits}")
ConvertToHex(${res} hex 2)
string(REGEX REPLACE "^([0-9]+)/([0-9]+)" "[${hex}]" line ${line})
# Convert U+0041 to 0x0041
string(REPLACE "U+" "0x" line ${line})
# Indent and append a comma
set(line " ${line},")
set(output "${output}\n${line}")
# Increment the index by the number of characters in the line,
# plus one for the new line character then multiple by two for the hex digit index
math(EXPR hexIndex "${hexIndex} + 2*(${lineLength} + 1)")
endforeach()
set(output "${output}\n"
" }\n"
"}\;\n")
file(WRITE ${outputFile} ${output})
|
