squeaknim.nim
6.56 KB
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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
import macros
# Note: Since we combine -d:useNimRtl with this module, we cannot use strutils.
# So we use our own helper procs here:
proc toUpper(c: char): char =
result = if c in {'a'..'z'}: chr(c.ord - 'a'.ord + 'A'.ord) else: c
proc capitalize(s: string): string {.noSideEffect.} =
result = toUpper(s[0]) & substr(s, 1)
proc invalidFormatString() {.noinline.} =
raise newException(ValueError, "invalid format string")
proc addf(s: var string, formatstr: string, a: varargs[string, `$`]) =
## The same as ``add(s, formatstr % a)``, but more efficient.
const PatternChars = {'a'..'z', 'A'..'Z', '0'..'9', '\128'..'\255', '_'}
var i = 0
var num = 0
while i < len(formatstr):
if formatstr[i] == '$':
case formatstr[i+1] # again we use the fact that strings
# are zero-terminated here
of '#':
if num >% a.high: invalidFormatString()
add s, a[num]
inc i, 2
inc num
of '$':
add s, '$'
inc(i, 2)
of '1'..'9', '-':
var j = 0
inc(i) # skip $
var negative = formatstr[i] == '-'
if negative: inc i
while formatstr[i] in {'0'..'9'}:
j = j * 10 + ord(formatstr[i]) - ord('0')
inc(i)
let idx = if not negative: j-1 else: a.len-j
if idx >% a.high: invalidFormatString()
add s, a[idx]
else:
invalidFormatString()
else:
add s, formatstr[i]
inc(i)
proc `%`(formatstr: string, a: openArray[string]): string =
result = newStringOfCap(formatstr.len + a.len shl 4)
addf(result, formatstr, a)
proc `%`(formatstr, a: string): string =
result = newStringOfCap(formatstr.len + a.len)
addf(result, formatstr, [a])
proc format(formatstr: string, a: varargs[string, `$`]): string =
result = newStringOfCap(formatstr.len + a.len)
addf(result, formatstr, a)
const
pragmaPos = 4
paramPos = 3
intType = when sizeof(int) == 8: "longlong" else: "long"
uintType = when sizeof(int) == 8: "ulonglong" else: "ulong"
var
dllName {.compileTime.}: string = "SqueakNimTest"
stCode {.compileTime.}: string = ""
gPrefix {.compileTime.}: string = ""
template setModulename*(s, prefix: string) =
## Sets the DLL name. This is also used to set the 'category' in the generated
## classes. 'prefix' is added to every generated class that wraps a Nim
## object.
static:
dllName = s
gPrefix = prefix
template writeExternalLibrary*() =
static:
addf(stCode, "ExternalLibrary subclass: #$1\C" &
"\tinstanceVariableNames: ''\C" &
"\tclassVariableNames: ''\C" &
"\tpoolDictionaries: ''\C" &
"\tcategory: '$2'!\C" &
"!$1 class methodsFor: 'primitives' stamp: 'SqueakNim'!\C",
gPrefix & capitalize(dllName), capitalize(dllName))
template writeSmalltalkCode*(filename: string) =
## You need to invoke this template to write the produced Smalltalk code to
## a file.
static:
writeFile(filename, stCode)
proc mapTypeToC(symbolicType: NimNode; isResultType: bool): string {.compileTime.} =
if symbolicType.kind == nnkEmpty and isResultType: return "void"
let t = symbolicType.getType
if symbolicType.kind == nnkSym and t.typeKind == ntyObject:
return gPrefix & $symbolicType
case t.typeKind
of ntyPtr, ntyVar:
if t.typeKind == ntyVar and isResultType:
quit "cannot wrap 'var T' as a result type"
expectKind t, nnkBracketExpr
let base = t[1]
if base.getType.typeKind == ntyArray:
expectKind base, nnkBracketExpr
result = mapTypeToC(base[2], isResultType) & "*"
else:
result = mapTypeToC(base, isResultType) & "*"
of ntyArray:
if isResultType:
quit "cannot wrap array as a result type"
expectKind t, nnkBracketExpr
result = mapTypeToC(t[2], isResultType) & "*"
of ntyCString: result = "char*"
of ntyPointer: result = "void*"
of ntyInt: result = intType
of ntyInt8: result = "sbyte"
of ntyInt16: result = "short"
of ntyInt32: result = "long"
of ntyInt64: result = "longlong"
of ntyUInt: result = uintType
of ntyUInt8: result = "ubyte"
of ntyUInt16: result = "ushort"
of ntyUInt32: result = "ulong"
of ntyUInt64: result = "ulonglong"
of ntyFloat, ntyFloat64: result = "double"
of ntyFloat32: result = "float"
of ntyBool, ntyChar, ntyEnum: result = "char"
else: quit "Error: cannot wrap to Squeak " & treeRepr(t)
macro exportSt*(body: stmt): stmt =
# generates something like:
# system: aString
#"Some kind of comment"
#
# <apicall: long 'system' (char*) module: 'libSystem.dylib'>
# ^self externalCallFailed.
result = body
result[pragmaPos].add(ident"exportc", ident"dynlib", ident"cdecl")
let params = result[paramPos]
let procName = $result[0]
var st = procName
#echo treeRepr params
if params.len > 1:
expectKind params[1], nnkIdentDefs
let ident = $params[1][0]
if ident.len > 1:
st.add(ident.capitalize & ": " & ident)
else:
st.add(": " & ident)
# return type:
var apicall = "<cdecl: " & mapTypeToC(params[0], true) & " '" &
procName & "' ("
var counter = 0
# parameter types:
for i in 1.. <params.len:
let param = params[i]
let L = param.len
for j in 0 .. param.len-3:
let name = param[j]
let typ = param[L-2]
if counter > 0:
apicall.add(" ")
st.addf(" $1: $1", name)
apicall.add(mapTypeToC(typ, false))
inc counter
apicall.add(") module: '" & dllName & "'>\C" &
"\t^self externalCallFailed\C!\C\C")
stCode.add(st & "\C\t\"Generated by NimSqueak\"\C\t" & apicall)
macro wrapObject*(typ: stmt; wrapFields=false): stmt =
## Declares a Smalltalk wrapper class.
var t = typ.getType()
if t.typeKind == ntyTypeDesc:
expectKind t, nnkBracketExpr
t = t[1]
expectKind t, nnkSym
let name = gPrefix & ($t).capitalize
if t.kind != nnkObjectTy: t = t.getType
expectKind t, nnkObjectTy
t = t[1]
expectKind t, nnkRecList
var fields = ""
if $wrapFields == "true":
for i in 0.. < t.len:
expectKind t[i], nnkSym
fields.addf "\t\t($# '$#')\C", $t[i], mapTypeToC(t[i], false)
let st = ("ExternalStructure subclass: #$1\C" &
"\tinstanceVariableNames: ''\C" &
"\tclassVariableNames: ''\C" &
"\tpoolDictionaries: 'FFIConstants'\C" &
"\tcategory: '$2'!\C\C" &
"$1 class\C" &
"\tinstanceVariableNames: ''!\C\C" &
"!$1 class methodsFor: 'field definition' stamp: 'SqueakNim'!\C" &
"\tfields\C" &
"\t^#(\C" &
"$3\C" &
"\t)! !\C" &
"$1 defineFields.\C!\C\C") % [name, capitalize(dllName), fields]
stCode.add(st)
result = newStmtList()