author | Stefan Vogel <sv@exept.de> |
Tue, 13 Jul 2004 15:10:20 +0200 | |
changeset 8447 | 9bdea3431846 |
parent 8140 | 7cc7ac5f29ca |
child 8530 | edcadeea17a1 |
permissions | -rw-r--r-- |
1 | 1 |
" |
5 | 2 |
COPYRIGHT (c) 1988 by Claus Gittinger |
202 | 3 |
All Rights Reserved |
1 | 4 |
|
5 |
This software is furnished under a license and may be used |
|
6 |
only in accordance with the terms of that license and with the |
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7 |
inclusion of the above copyright notice. This software may not |
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8 |
be provided or otherwise made available to, or used by, any |
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9 |
other person. No title to or ownership of the software is |
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10 |
hereby transferred. |
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" |
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12 |
||
5810 | 13 |
"{ Package: 'stx:libbasic' }" |
14 |
||
1 | 15 |
PositionableStream subclass:#ReadStream |
970
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16 |
instanceVariableNames:'' |
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17 |
classVariableNames:'' |
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18 |
poolDictionaries:'' |
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19 |
category:'Streams' |
1 | 20 |
! |
21 |
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!ReadStream class methodsFor:'documentation'! |
88 | 23 |
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24 |
copyright |
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25 |
" |
|
26 |
COPYRIGHT (c) 1988 by Claus Gittinger |
|
202 | 27 |
All Rights Reserved |
1 | 28 |
|
88 | 29 |
This software is furnished under a license and may be used |
30 |
only in accordance with the terms of that license and with the |
|
31 |
inclusion of the above copyright notice. This software may not |
|
32 |
be provided or otherwise made available to, or used by, any |
|
33 |
other person. No title to or ownership of the software is |
|
34 |
hereby transferred. |
|
35 |
" |
|
36 |
! |
|
1 | 37 |
|
88 | 38 |
documentation |
39 |
" |
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40 |
ReadStream defines protocol for reading streamwise over collections. |
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1295 | 41 |
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42 |
[author:] |
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Claus Gittinger |
1295 | 44 |
|
88 | 45 |
" |
46 |
! ! |
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1 | 47 |
|
202 | 48 |
!ReadStream methodsFor:'converting'! |
49 |
||
50 |
readStream |
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"return a readStream from the receiver. Since this is already |
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a readStream, return self." |
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53 |
||
54 |
^ self |
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Define #xxxStreamOrNil methods.
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55 |
! |
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Define #xxxStreamOrNil methods.
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|
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Define #xxxStreamOrNil methods.
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readStreamOrNil |
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"return a readStream from the receiver. Since this is already |
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Define #xxxStreamOrNil methods.
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59 |
a readStream, return self. |
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Define #xxxStreamOrNil methods.
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60 |
|
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Define #xxxStreamOrNil methods.
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This method has been defined for protocol copmatibility with Filename" |
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Define #xxxStreamOrNil methods.
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|
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63 |
^ self |
202 | 64 |
! ! |
65 |
||
1400 | 66 |
!ReadStream methodsFor:'emphasis'! |
67 |
||
68 |
emphasis |
|
69 |
"return the emphasis of the current (i.e. next returned by #next) |
|
70 |
element. Streams on a string will return nil for all elements. |
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71 |
Streams on collections which nothing at all about emphasises, |
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72 |
will report an error." |
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||
7114 | 74 |
^ collection emphasisAt:(position - ZeroPosition + 1). |
1400 | 75 |
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76 |
" |
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77 |
|t s| |
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78 |
||
79 |
t := 'hello world' asText |
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7114 | 80 |
emphasizeFrom:1 to:5 with:#bold; |
81 |
emphasizeFrom:7 to:11 with:#italic. |
|
1400 | 82 |
|
83 |
s := t readStream. |
|
84 |
[s atEnd] whileFalse:[ |
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7114 | 85 |
Transcript show:(s emphasis); show:' '. |
86 |
Transcript show:''''; show:(s next); showCR:''''. |
|
1400 | 87 |
]. |
88 |
" |
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89 |
||
90 |
"Modified: 15.5.1996 / 17:30:33 / cg" |
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91 |
! ! |
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92 |
||
345 | 93 |
!ReadStream methodsFor:'queries'! |
94 |
||
5310 | 95 |
copyFrom:beginning to:end |
96 |
^ collection copyFrom:beginning to:end |
|
97 |
! |
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98 |
||
345 | 99 |
isReadable |
2997 | 100 |
"return true, if reading is supported by the recevier. |
101 |
Here, true is always returned." |
|
102 |
||
345 | 103 |
^ true |
2997 | 104 |
|
105 |
"Modified: 4.10.1997 / 17:59:21 / cg" |
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! |
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107 |
|
6315 | 108 |
isWritable |
109 |
"return true, if writing is supported by the recevier. |
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110 |
This has to be redefined in concrete subclasses." |
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111 |
||
112 |
^ false |
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113 |
! |
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115 |
size |
2997 | 116 |
"return the number of elements in the streamed collection." |
117 |
||
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^ collection size |
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|
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"Created: 13.9.1996 / 18:14:35 / cg" |
2997 | 121 |
"Modified: 4.10.1997 / 17:59:45 / cg" |
345 | 122 |
! ! |
123 |
||
59 | 124 |
!ReadStream methodsFor:'reading'! |
1 | 125 |
|
126 |
next |
|
127 |
"return the next element; advance read pointer. |
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2 | 128 |
return nil, if there is no next element. |
345 | 129 |
- tuned for a bit more speed on String/ByteArray/Array-Streams" |
1 | 130 |
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131 |
|ret| |
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132 |
||
133 |
%{ /* NOCONTEXT */ |
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134 |
||
135 |
REGISTER int pos; |
|
136 |
unsigned ch; |
|
252 | 137 |
OBJ coll, p, l; |
1 | 138 |
|
1133 | 139 |
coll = __INST(collection); |
140 |
p = __INST(position); |
|
141 |
l = __INST(readLimit); |
|
1 | 142 |
|
252 | 143 |
if (__isNonNilObject(coll) && __bothSmallInteger(p, l)) { |
144 |
||
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pos = __intVal(p); |
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/* make 1-based */ |
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pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
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if (pos > 0 && pos <= __intVal(l)) { |
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149 |
OBJ cls; |
59 | 150 |
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cls = __qClass(coll); |
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if (cls == @global(String)) { |
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153 |
if (pos <= __stringSize(coll)) { |
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__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
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ch = __stringVal(coll)[pos-1]; |
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RETURN ( __MKCHARACTER(ch) ); |
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} |
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} else if (cls == @global(ByteArray)) { |
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159 |
if (pos <= __byteArraySize(coll)) { |
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__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
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161 |
ch = __ByteArrayInstPtr(coll)->ba_element[pos-1]; |
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162 |
RETURN ( __MKSMALLINT(ch) ); |
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163 |
} |
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164 |
} else if (cls == @global(Unicode16String)) { |
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165 |
if (pos <= __unicode16StringSize(coll)) { |
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166 |
__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
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|
167 |
ch = __Unicode16StringInstPtr(coll)->s_element[pos-1]; |
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168 |
RETURN ( __MKUCHARACTER(ch) ); |
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169 |
} |
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170 |
} else if (cls == @global(Array)) { |
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171 |
if (pos <= __arraySize(coll)) { |
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172 |
__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
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173 |
RETURN ( __ArrayInstPtr(coll)->a_element[pos-1]); |
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174 |
} |
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175 |
} |
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176 |
} |
1 | 177 |
} |
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178 |
%}. |
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|
179 |
((position + 1 - ZeroPosition) > readLimit) ifTrue:[^ self pastEnd]. |
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|
180 |
ret := collection at:(position + 1 - ZeroPosition). |
1 | 181 |
position := position + 1. |
182 |
^ ret |
|
183 |
! |
|
184 |
||
252 | 185 |
nextAlphaNumericWord |
1 | 186 |
"read the next word (i.e. up to non letter-or-digit). |
187 |
return a string containing those characters. |
|
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|
188 |
Skips any non-alphanumeric chars first. |
59 | 189 |
- tuned for speed on String-Streams for faster scanning" |
1 | 190 |
%{ |
191 |
/* speedup, if collection is a string */ |
|
192 |
||
193 |
int pos, limit, sz; |
|
194 |
int len; |
|
13 | 195 |
char buffer[256]; |
196 |
REGISTER unsigned char *cp; |
|
197 |
REGISTER unsigned ch; |
|
252 | 198 |
OBJ coll, p, l; |
1 | 199 |
|
1133 | 200 |
coll = __INST(collection); |
201 |
p = __INST(position); |
|
202 |
l = __INST(readLimit); |
|
252 | 203 |
|
204 |
if (__isString(coll) && __bothSmallInteger(p, l)) { |
|
205 |
||
1133 | 206 |
pos = __intVal(p); |
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|
207 |
/* make 1-based */ |
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changeset
|
208 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
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parents:
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diff
changeset
|
209 |
|
1133 | 210 |
limit = __intVal(l); |
329 | 211 |
sz = __qSize(coll) - OHDR_SIZE; |
202 | 212 |
if (sz < limit) |
213 |
limit = sz; |
|
1133 | 214 |
cp = __stringVal(coll) + pos - 1; |
1 | 215 |
|
202 | 216 |
for (;;) { |
217 |
if (pos > limit) break; |
|
218 |
ch = *cp; |
|
1 | 219 |
|
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|
220 |
if (((ch >= 'a') && (ch <= 'z')) || |
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|
221 |
((ch >= 'A') && (ch <= 'Z')) || |
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|
222 |
((ch >= '0') && (ch <= '9'))) |
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|
223 |
break; |
202 | 224 |
cp++; |
225 |
pos++; |
|
226 |
} |
|
1 | 227 |
|
202 | 228 |
len = 0; |
229 |
for (;;) { |
|
230 |
if (pos > limit) break; |
|
231 |
ch = *cp & 0xFF; |
|
1 | 232 |
|
202 | 233 |
if (! (((ch >= 'a') && (ch <= 'z')) || |
234 |
((ch >= 'A') && (ch <= 'Z')) || |
|
235 |
((ch >= '0') && (ch <= '9')))) |
|
236 |
break; |
|
237 |
buffer[len++] = ch; |
|
238 |
if (len >= (sizeof(buffer)-1)) { |
|
239 |
/* emergency */ |
|
240 |
break; |
|
241 |
} |
|
242 |
pos++; |
|
243 |
cp++; |
|
244 |
} |
|
1 | 245 |
|
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parents:
6814
diff
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|
246 |
/* make ZeroPosition-based */ |
984d8271d06b
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parents:
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diff
changeset
|
247 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
1133 | 248 |
__INST(position) = __MKSMALLINT(pos); |
202 | 249 |
buffer[len] = '\0'; |
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|
250 |
RETURN ( (len != 0) ? __MKSTRING_L(buffer, len) : nil ); |
1 | 251 |
} |
252 |
%} |
|
253 |
. |
|
252 | 254 |
^ super nextAlphaNumericWord |
1 | 255 |
! |
256 |
||
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|
257 |
nextByte |
4826
ff30434f0feb
#nextByte does return an integer, even when operating on a
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diff
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|
258 |
"return the next element; advance read pointer. |
ff30434f0feb
#nextByte does return an integer, even when operating on a
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diff
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|
259 |
return nil, if there is no next element. |
ff30434f0feb
#nextByte does return an integer, even when operating on a
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diff
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|
260 |
- tuned for a bit more speed on String/ByteArray/Array-Streams" |
1665
928e9a308cea
added ExternalStream compatibility protocol
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parents:
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|
261 |
|
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|
262 |
|ret| |
928e9a308cea
added ExternalStream compatibility protocol
Claus Gittinger <cg@exept.de>
parents:
1488
diff
changeset
|
263 |
|
4826
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
264 |
%{ /* NOCONTEXT */ |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
265 |
|
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
266 |
REGISTER int pos; |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
267 |
unsigned ch; |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
268 |
OBJ coll, p, l; |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
269 |
|
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
270 |
coll = __INST(collection); |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
271 |
p = __INST(position); |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
272 |
l = __INST(readLimit); |
ff30434f0feb
#nextByte does return an integer, even when operating on a
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4522
diff
changeset
|
273 |
|
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
274 |
if (__isNonNilObject(coll) && __bothSmallInteger(p, l)) { |
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
275 |
|
8098
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
276 |
pos = __intVal(p); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
277 |
/* make 1-based */ |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
278 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
279 |
if (pos > 0 && pos <= __intVal(l)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
280 |
OBJ cls; |
4826
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
281 |
|
8098
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
282 |
cls = __qClass(coll); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
283 |
if (cls == @global(String)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
284 |
if (pos <= __stringSize(coll)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
285 |
__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
286 |
ch = __stringVal(coll)[pos-1]; |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
287 |
RETURN ( __MKSMALLINT(ch) ); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
288 |
} |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
289 |
} else if (cls == @global(ByteArray)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
290 |
if (pos <= __byteArraySize(coll)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
291 |
__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
292 |
ch = __ByteArrayInstPtr(coll)->ba_element[pos-1]; |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
293 |
RETURN ( __MKSMALLINT(ch) ); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
294 |
} |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
295 |
} else if (cls == @global(Array)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
296 |
if (pos <= __arraySize(coll)) { |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
297 |
__INST(position) = __MKSMALLINT(__intVal(__INST(position)) + 1); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
298 |
RETURN ( __ArrayInstPtr(coll)->a_element[pos-1]); |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
299 |
} |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
300 |
} |
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
301 |
} |
4826
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
302 |
} |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
303 |
%}. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
304 |
((position + 1 - ZeroPosition) > readLimit) ifTrue:[^ self pastEnd]. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
305 |
ret := collection at:(position + 1 -ZeroPosition). |
4826
ff30434f0feb
#nextByte does return an integer, even when operating on a
Claus Gittinger <cg@exept.de>
parents:
4522
diff
changeset
|
306 |
position := position + 1. |
8098
8d1d5cd8529b
nextByte should (at least) return integer when reading from a string-stream
Claus Gittinger <cg@exept.de>
parents:
7483
diff
changeset
|
307 |
^ ret asInteger |
1665
928e9a308cea
added ExternalStream compatibility protocol
Claus Gittinger <cg@exept.de>
parents:
1488
diff
changeset
|
308 |
! |
928e9a308cea
added ExternalStream compatibility protocol
Claus Gittinger <cg@exept.de>
parents:
1488
diff
changeset
|
309 |
|
611 | 310 |
nextDecimalInteger |
311 |
"read the next integer in radix 10. dont skip whitespace. |
|
312 |
- tuned for speed on String-Streams for faster scanning" |
|
313 |
||
314 |
|value nextOne| |
|
315 |
%{ |
|
316 |
int pos, limit, sz; |
|
317 |
REGISTER unsigned char *cp; |
|
318 |
REGISTER unsigned ch; |
|
319 |
int val = 0; |
|
320 |
OBJ coll, p, l; |
|
321 |
||
1133 | 322 |
coll = __INST(collection); |
323 |
p = __INST(position); |
|
324 |
l = __INST(readLimit); |
|
611 | 325 |
|
326 |
if (__isString(coll) && __bothSmallInteger(p, l)) { |
|
327 |
||
1133 | 328 |
pos = __intVal(p); |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
329 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
330 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
1133 | 331 |
limit = __intVal(l); |
611 | 332 |
sz = __qSize(coll) - OHDR_SIZE; |
333 |
if (sz < limit) |
|
334 |
limit = sz; |
|
1133 | 335 |
cp = __stringVal(coll) + pos - 1; |
611 | 336 |
|
337 |
for (;;) { |
|
338 |
if (pos > limit) break; |
|
339 |
ch = *cp; |
|
340 |
||
341 |
if ((ch < '0') || (ch > '9')) break; |
|
342 |
val = val * 10 + (ch - '0'); |
|
343 |
pos++; |
|
344 |
if (val > (_MAX_INT / 10)) goto oops; |
|
345 |
cp++; |
|
346 |
} |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
347 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
348 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
1133 | 349 |
__INST(position) = __MKSMALLINT(pos); |
4271
d1878c9dc428
oops - return instead of RETURN macro
Claus Gittinger <cg@exept.de>
parents:
3316
diff
changeset
|
350 |
RETURN (__MKSMALLINT(val)); |
611 | 351 |
} |
352 |
oops: |
|
1133 | 353 |
value = __MKSMALLINT(val); |
611 | 354 |
%} |
355 |
. |
|
356 |
"fall-back for non-string streams - we have to continue where |
|
357 |
above primitive left off, in case of a large integer ... |
|
358 |
(instead of doing a super nextDecimalInteger)" |
|
359 |
||
360 |
nextOne := self peek. |
|
361 |
[nextOne notNil and:[nextOne isDigitRadix:10]] whileTrue:[ |
|
362 |
value = (value * 10) + nextOne digitValue. |
|
363 |
nextOne := self nextPeek |
|
364 |
]. |
|
365 |
^ value |
|
366 |
! |
|
367 |
||
368 |
nextPeek |
|
369 |
"advance read pointer return the peek element. |
|
370 |
this is equivalent to (self next; peek). |
|
371 |
- tuned for speed on String-Streams for faster scanning" |
|
372 |
||
373 |
%{ /* NOCONTEXT */ |
|
374 |
OBJ coll, l, p; |
|
375 |
||
1133 | 376 |
coll = __INST(collection); |
377 |
p = __INST(position); |
|
378 |
l = __INST(readLimit); |
|
611 | 379 |
|
380 |
if (__isString(coll) && __bothSmallInteger(p, l)) { |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
381 |
REGISTER int pos; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
382 |
unsigned ch; |
611 | 383 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
384 |
pos = __intVal(p); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
385 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
386 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
387 |
if ((pos > 0) && (pos < __intVal(l)) && (pos < __stringSize(coll))) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
388 |
pos = pos + 1; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
389 |
ch = __stringVal(coll)[pos-1]; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
390 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
391 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
392 |
__INST(position) = __MKSMALLINT(pos); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
393 |
RETURN ( __MKCHARACTER(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
394 |
} |
611 | 395 |
} |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
396 |
%}. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
397 |
((position + 1 - ZeroPosition) > readLimit) ifTrue:[^ self pastEnd]. |
611 | 398 |
position := position + 1. |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
399 |
((position + 1 - ZeroPosition) > readLimit) ifTrue:[^ self pastEnd]. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
400 |
^ collection at:(position + 1 - ZeroPosition) |
611 | 401 |
! |
402 |
||
1 | 403 |
nextSymbol |
404 |
"read the next selector-symbol (i.e. up to non letter-or-digit). |
|
405 |
return a string containing those characters. |
|
59 | 406 |
- tuned for speed on String-Streams for faster scanning" |
1 | 407 |
%{ |
408 |
int pos, limit, sz; |
|
409 |
int len; |
|
13 | 410 |
char buffer[256]; |
411 |
REGISTER unsigned char *cp; |
|
412 |
REGISTER unsigned ch; |
|
252 | 413 |
OBJ coll, p, l; |
1 | 414 |
|
1133 | 415 |
coll = __INST(collection); |
416 |
p = __INST(position); |
|
417 |
l = __INST(readLimit); |
|
252 | 418 |
|
419 |
if (__isString(coll) && __bothSmallInteger(p, l)) { |
|
420 |
||
1133 | 421 |
pos = __intVal(p); |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
422 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
423 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
1133 | 424 |
limit = __intVal(l); |
329 | 425 |
sz = __qSize(coll) - OHDR_SIZE; |
202 | 426 |
if (sz < limit) |
427 |
limit = sz; |
|
1133 | 428 |
cp = __stringVal(coll) + pos - 1; |
1 | 429 |
|
202 | 430 |
len = 0; |
431 |
for (;;) { |
|
432 |
if (pos > limit) break; |
|
433 |
ch = *cp; |
|
1 | 434 |
|
202 | 435 |
if (! (((ch >= 'a') && (ch <= 'z')) || |
436 |
((ch >= 'A') && (ch <= 'Z')) || |
|
437 |
((ch >= '0') && (ch <= '9')) || |
|
438 |
(ch == ':'))) |
|
439 |
break; |
|
440 |
buffer[len++] = ch; |
|
441 |
if (len >= (sizeof(buffer)-1)) { |
|
442 |
/* emergency */ |
|
443 |
break; |
|
444 |
} |
|
445 |
pos++; |
|
446 |
cp++; |
|
447 |
} |
|
1 | 448 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
449 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
450 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
1133 | 451 |
__INST(position) = __MKSMALLINT(pos); |
202 | 452 |
buffer[len] = '\0'; |
1688
8a42db1eea60
removed all COMMA_CON / CON_COMMA uses
Claus Gittinger <cg@exept.de>
parents:
1665
diff
changeset
|
453 |
RETURN ( (len != 0) ? __MKSTRING_L(buffer, len) : nil ); |
1 | 454 |
} |
455 |
%} |
|
456 |
. |
|
457 |
^ super nextSymbol |
|
458 |
! |
|
459 |
||
611 | 460 |
peek |
461 |
"return the next element; do NOT advance read pointer. |
|
462 |
return nil, if there is no next element. |
|
463 |
- tuned for a bit more speed on String/ByteArray/Array-Streams" |
|
1 | 464 |
|
465 |
%{ /* NOCONTEXT */ |
|
611 | 466 |
|
467 |
REGISTER int pos; |
|
468 |
unsigned ch; |
|
469 |
OBJ coll; |
|
470 |
OBJ cls, p, l; |
|
1 | 471 |
|
1133 | 472 |
coll = __INST(collection); |
473 |
p = __INST(position); |
|
474 |
l = __INST(readLimit); |
|
252 | 475 |
|
611 | 476 |
if (__isNonNilObject(coll) && __bothSmallInteger(p, l)) { |
1 | 477 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
478 |
pos = __intVal(p); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
479 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
480 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
481 |
if (pos <= __intVal(l) && pos > 0) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
482 |
cls = __qClass(coll); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
483 |
if (cls == @global(String)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
484 |
if (pos <= __stringSize(coll)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
485 |
ch = __stringVal(coll)[pos-1]; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
486 |
RETURN ( __MKCHARACTER(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
487 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
488 |
} else if (cls == @global(ByteArray)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
489 |
if (pos <= __byteArraySize(coll)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
490 |
ch = __ByteArrayInstPtr(coll)->ba_element[pos-1]; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
491 |
RETURN ( __MKSMALLINT(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
492 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
493 |
} else if (cls == @global(Array)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
494 |
if (pos <= __arraySize(coll)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
495 |
RETURN ( __ArrayInstPtr(coll)->a_element[pos-1]); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
496 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
497 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
498 |
} |
1 | 499 |
} |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
500 |
%}. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
501 |
((position + 1 - ZeroPosition) > readLimit) ifTrue:[^ self pastEnd]. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
502 |
^ collection at:(position + 1 - ZeroPosition) |
1 | 503 |
! |
504 |
||
3316 | 505 |
peekOrNil |
506 |
"return the next element; do NOT advance read pointer. |
|
507 |
return nil, if there is no next element. |
|
508 |
This is much like #peek - |
|
509 |
However, unlike #peek, this does not raise an atEnd-query signal - even |
|
510 |
if handled. Instead, nil is returned immediately." |
|
511 |
||
512 |
%{ /* NOCONTEXT */ |
|
513 |
||
514 |
REGISTER int pos; |
|
515 |
unsigned ch; |
|
516 |
OBJ coll; |
|
517 |
OBJ cls, p, l; |
|
518 |
||
519 |
coll = __INST(collection); |
|
520 |
p = __INST(position); |
|
521 |
l = __INST(readLimit); |
|
522 |
||
523 |
if (__isNonNilObject(coll) && __bothSmallInteger(p, l)) { |
|
524 |
||
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
525 |
pos = __intVal(p); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
526 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
527 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
528 |
if (pos <= __intVal(l) && pos > 0) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
529 |
cls = __qClass(coll); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
530 |
if (cls == @global(String)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
531 |
if (pos <= __stringSize(coll)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
532 |
ch = __stringVal(coll)[pos-1]; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
533 |
RETURN ( __MKCHARACTER(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
534 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
535 |
RETURN ( nil ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
536 |
} else if (cls == @global(ByteArray)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
537 |
if (pos <= __byteArraySize(coll)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
538 |
ch = __ByteArrayInstPtr(coll)->ba_element[pos-1]; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
539 |
RETURN ( __MKSMALLINT(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
540 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
541 |
RETURN ( nil ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
542 |
} else if (cls == @global(Array)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
543 |
if (pos <= __arraySize(coll)) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
544 |
RETURN ( __ArrayInstPtr(coll)->a_element[pos-1]); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
545 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
546 |
RETURN ( nil ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
547 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
548 |
} |
3316 | 549 |
} |
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
550 |
%}. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
551 |
((position + 1 - ZeroPosition) > readLimit) ifTrue:[^ nil]. |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
552 |
^ collection at:(position + 1 - ZeroPosition) |
3316 | 553 |
! |
554 |
||
1 | 555 |
skipSeparators |
556 |
"skip all whitespace; next will return next non-white-space element. |
|
59 | 557 |
Return the peeked character or nil, if the end-of-stream was reached. |
2 | 558 |
- reimplemented for speed on String-Streams for faster scanning" |
1 | 559 |
|
560 |
%{ /* NOCONTEXT */ |
|
252 | 561 |
OBJ coll, p, l; |
1 | 562 |
|
1133 | 563 |
coll = __INST(collection); |
564 |
p = __INST(position); |
|
565 |
l = __INST(readLimit); |
|
252 | 566 |
|
567 |
if (__isString(coll) && __bothSmallInteger(p, l)) { |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
568 |
REGISTER unsigned char *chars; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
569 |
REGISTER unsigned ch; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
570 |
REGISTER int pos; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
571 |
int limit; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
572 |
int sz; |
1 | 573 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
574 |
pos = __intVal(p); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
575 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
576 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
577 |
if (pos <= 0) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
578 |
RETURN ( nil ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
579 |
} |
1 | 580 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
581 |
limit = __intVal(l); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
582 |
sz = __qSize(coll) - OHDR_SIZE; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
583 |
if (limit > sz) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
584 |
limit = sz; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
585 |
} |
1 | 586 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
587 |
chars = (unsigned char *)(__stringVal(coll) + pos - 1); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
588 |
while (pos <= limit) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
589 |
pos++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
590 |
ch = *chars++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
591 |
if ((ch > 0x20) |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
592 |
|| ((ch != ' ') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
593 |
&& (ch != '\t') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
594 |
&& (ch != '\r') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
595 |
&& (ch != '\n') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
596 |
&& (ch != '\f') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
597 |
&& (ch != 0x0B))) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
598 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
599 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
600 |
__INST(position) = __MKSMALLINT(pos-1); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
601 |
RETURN ( __MKCHARACTER(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
602 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
603 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
604 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
605 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
606 |
__INST(position) = __MKSMALLINT(pos); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
607 |
RETURN ( nil ); |
1 | 608 |
} |
1406 | 609 |
%}. |
1 | 610 |
^ super skipSeparators |
1406 | 611 |
|
612 |
" |
|
613 |
|s| |
|
614 |
||
615 |
s := ' hello world ' readStream. |
|
616 |
s skipSeparators. |
|
617 |
s next. |
|
618 |
" |
|
1 | 619 |
! |
620 |
||
13 | 621 |
skipSeparatorsExceptCR |
622 |
"skip all whitespace except newlines; |
|
202 | 623 |
next will return next non-white-space element. |
624 |
- reimplemented for speed on String-Streams for faster scanning" |
|
625 |
||
13 | 626 |
%{ /* NOCONTEXT */ |
627 |
||
252 | 628 |
OBJ coll, p, l; |
629 |
||
1133 | 630 |
coll = __INST(collection); |
631 |
p = __INST(position); |
|
632 |
l = __INST(readLimit); |
|
252 | 633 |
|
634 |
if (__isString(coll) && __bothSmallInteger(p, l)) { |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
635 |
REGISTER unsigned char *chars; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
636 |
REGISTER unsigned ch; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
637 |
REGISTER int pos; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
638 |
int limit; |
13 | 639 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
640 |
pos = __intVal(p); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
641 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
642 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
643 |
if (pos <= 0) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
644 |
RETURN ( nil ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
645 |
} |
2162
7e1601f633b6
ff is a separator too (in #skipSeparators*)
Claus Gittinger <cg@exept.de>
parents:
1688
diff
changeset
|
646 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
647 |
limit = __intVal(l); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
648 |
if (limit > (__qSize(coll) - OHDR_SIZE)) |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
649 |
limit = __qSize(coll) - OHDR_SIZE; |
13 | 650 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
651 |
chars = (unsigned char *)(__stringVal(coll) + pos - 1); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
652 |
while (pos <= limit) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
653 |
ch = *chars++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
654 |
if (((int)ch > 0x20) |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
655 |
|| ( |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
656 |
(ch != ' ') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
657 |
&& (ch != '\t') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
658 |
&& (ch != '\f') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
659 |
&& (ch != '\b') |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
660 |
&& (ch != 0x0B))) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
661 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
662 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
663 |
__INST(position) = __MKSMALLINT(pos); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
664 |
RETURN ( __MKCHARACTER(ch) ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
665 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
666 |
pos++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
667 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
668 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
669 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
670 |
__INST(position) = __MKSMALLINT(pos); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
671 |
RETURN ( nil ); |
13 | 672 |
} |
673 |
%} |
|
674 |
. |
|
675 |
^ super skipSeparatorsExceptCR |
|
676 |
! |
|
677 |
||
611 | 678 |
skipThrough:anObject |
6011
3b91d7834ca5
fixed: skipThrough dod not position atEnd if the element was not found.
Claus Gittinger <cg@exept.de>
parents:
5810
diff
changeset
|
679 |
"skip all objects up-to and including anObject. |
3b91d7834ca5
fixed: skipThrough dod not position atEnd if the element was not found.
Claus Gittinger <cg@exept.de>
parents:
5810
diff
changeset
|
680 |
Return the receiver if skip was successful, |
3b91d7834ca5
fixed: skipThrough dod not position atEnd if the element was not found.
Claus Gittinger <cg@exept.de>
parents:
5810
diff
changeset
|
681 |
otherwise (i.e. if not found) return nil and leave the stream positioned at the end. |
611 | 682 |
On success, the next read operation will return the element after anObject. |
683 |
- reimplemented for speed on String-Streams for faster scanning" |
|
684 |
||
685 |
%{ /* NOCONTEXT */ |
|
686 |
OBJ coll, p, l; |
|
687 |
||
1133 | 688 |
coll = __INST(collection); |
689 |
p = __INST(position); |
|
690 |
l = __INST(readLimit); |
|
611 | 691 |
|
692 |
if (__isString(coll) |
|
693 |
&& __isCharacter(anObject) |
|
694 |
&& __bothSmallInteger(p, l)) { |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
695 |
REGISTER unsigned char *chars; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
696 |
REGISTER int pos, limit; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
697 |
unsigned ch; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
698 |
int sz; |
611 | 699 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
700 |
pos = __intVal(p); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
701 |
/* make 1-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
702 |
pos = pos + 1 - __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
703 |
if (pos <= 0) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
704 |
RETURN ( nil ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
705 |
} |
611 | 706 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
707 |
limit = __intVal(l); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
708 |
sz = __stringSize(coll); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
709 |
if (limit > sz) limit = sz; |
611 | 710 |
|
7051
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
711 |
chars = (unsigned char *)(__stringVal(coll) + pos - 1); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
712 |
ch = __intVal(_characterVal(anObject)) & 0xFF; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
713 |
while (pos < limit) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
714 |
if (*chars == ch) { |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
715 |
ch = *++chars; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
716 |
pos++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
717 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
718 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
719 |
__INST(position) = __MKSMALLINT(pos); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
720 |
RETURN ( self ); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
721 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
722 |
chars++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
723 |
pos++; |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
724 |
} |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
725 |
/* make ZeroPosition-based */ |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
726 |
pos = pos - 1 + __intVal( @global(PositionableStream:ZeroPosition)); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
727 |
__INST(position) = __MKSMALLINT(pos+1); |
984d8271d06b
preps for 0-based stream positions
Claus Gittinger <cg@exept.de>
parents:
6814
diff
changeset
|
728 |
RETURN ( nil ); |
611 | 729 |
} |
6011
3b91d7834ca5
fixed: skipThrough dod not position atEnd if the element was not found.
Claus Gittinger <cg@exept.de>
parents:
5810
diff
changeset
|
730 |
%}. |
611 | 731 |
^ super skipThrough:anObject |
1 | 732 |
! ! |
733 |
||
59 | 734 |
!ReadStream methodsFor:'writing'! |
1 | 735 |
|
736 |
nextPut:anElement |
|
10 | 737 |
"catch write access to readstreams - report an error" |
738 |
||
739 |
self shouldNotImplement |
|
1 | 740 |
! ! |
611 | 741 |
|
2162
7e1601f633b6
ff is a separator too (in #skipSeparators*)
Claus Gittinger <cg@exept.de>
parents:
1688
diff
changeset
|
742 |
!ReadStream class methodsFor:'documentation'! |
701 | 743 |
|
744 |
version |
|
8140
7cc7ac5f29ca
Define #xxxStreamOrNil methods.
Stefan Vogel <sv@exept.de>
parents:
8098
diff
changeset
|
745 |
^ '$Header: /cvs/stx/stx/libbasic/ReadStream.st,v 1.50 2004-03-09 12:13:55 stefan Exp $' |
701 | 746 |
! ! |