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1 : // © 2016 and later: Unicode, Inc. and others.
2 : // License & terms of use: http://www.unicode.org/copyright.html
3 : /*
4 : *******************************************************************************
5 : *
6 : * Copyright (C) 1999-2010, International Business Machines
7 : * Corporation and others. All Rights Reserved.
8 : *
9 : *******************************************************************************
10 : * file name: uinvchar.c
11 : * encoding: UTF-8
12 : * tab size: 8 (not used)
13 : * indentation:2
14 : *
15 : * created on: 2004sep14
16 : * created by: Markus W. Scherer
17 : *
18 : * Functions for handling invariant characters, moved here from putil.c
19 : * for better modularization.
20 : */
21 :
22 : #include "unicode/utypes.h"
23 : #include "unicode/ustring.h"
24 : #include "udataswp.h"
25 : #include "cstring.h"
26 : #include "cmemory.h"
27 : #include "uassert.h"
28 : #include "uinvchar.h"
29 :
30 : /* invariant-character handling --------------------------------------------- */
31 :
32 : /*
33 : * These maps for ASCII to/from EBCDIC map invariant characters (see utypes.h)
34 : * appropriately for most EBCDIC codepages.
35 : *
36 : * They currently also map most other ASCII graphic characters,
37 : * appropriately for codepages 37 and 1047.
38 : * Exceptions: The characters for []^ have different codes in 37 & 1047.
39 : * Both versions are mapped to ASCII.
40 : *
41 : * ASCII 37 1047
42 : * [ 5B BA AD
43 : * ] 5D BB BD
44 : * ^ 5E B0 5F
45 : *
46 : * There are no mappings for variant characters from Unicode to EBCDIC.
47 : *
48 : * Currently, C0 control codes are also included in these maps.
49 : * Exceptions: S/390 Open Edition swaps LF and NEL codes compared with other
50 : * EBCDIC platforms; both codes (15 and 25) are mapped to ASCII LF (0A),
51 : * but there is no mapping for ASCII LF back to EBCDIC.
52 : *
53 : * ASCII EBCDIC S/390-OE
54 : * LF 0A 25 15
55 : * NEL 85 15 25
56 : *
57 : * The maps below explicitly exclude the variant
58 : * control and graphical characters that are in ASCII-based
59 : * codepages at 0x80 and above.
60 : * "No mapping" is expressed by mapping to a 00 byte.
61 : *
62 : * These tables do not establish a converter or a codepage.
63 : */
64 :
65 : static const uint8_t asciiFromEbcdic[256]={
66 : 0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
67 : 0x10, 0x11, 0x12, 0x13, 0x00, 0x0a, 0x08, 0x00, 0x18, 0x19, 0x00, 0x00, 0x1c, 0x1d, 0x1e, 0x1f,
68 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x17, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07,
69 : 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1a,
70 :
71 : 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
72 : 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e,
73 : 0x2d, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x25, 0x5f, 0x3e, 0x3f,
74 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
75 :
76 : 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
77 : 0x00, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 : 0x00, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x5b, 0x00, 0x00,
79 : 0x5e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5b, 0x5d, 0x00, 0x5d, 0x00, 0x00,
80 :
81 : 0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 : 0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 : 0x5c, 0x00, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 : 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
85 : };
86 :
87 : static const uint8_t ebcdicFromAscii[256]={
88 : 0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f, 0x16, 0x05, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
89 : 0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26, 0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f,
90 : 0x40, 0x00, 0x7f, 0x00, 0x00, 0x6c, 0x50, 0x7d, 0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61,
91 : 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f,
92 :
93 : 0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,
94 : 0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0x00, 0x00, 0x00, 0x00, 0x6d,
95 : 0x00, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,
96 : 0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0x00, 0x00, 0x00, 0x00, 0x07,
97 :
98 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
99 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
100 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
101 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
102 :
103 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
104 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
105 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
106 : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
107 : };
108 :
109 : /* Same as asciiFromEbcdic[] except maps all letters to lowercase. */
110 : static const uint8_t lowercaseAsciiFromEbcdic[256]={
111 : 0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
112 : 0x10, 0x11, 0x12, 0x13, 0x00, 0x0a, 0x08, 0x00, 0x18, 0x19, 0x00, 0x00, 0x1c, 0x1d, 0x1e, 0x1f,
113 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x17, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07,
114 : 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1a,
115 :
116 : 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
117 : 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e,
118 : 0x2d, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x25, 0x5f, 0x3e, 0x3f,
119 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
120 :
121 : 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
122 : 0x00, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
123 : 0x00, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x5b, 0x00, 0x00,
124 : 0x5e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5b, 0x5d, 0x00, 0x5d, 0x00, 0x00,
125 :
126 : 0x7b, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
127 : 0x7d, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
128 : 0x7c, 0x00, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
129 : 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
130 : };
131 :
132 : /*
133 : * Bit sets indicating which characters of the ASCII repertoire
134 : * (by ASCII/Unicode code) are "invariant".
135 : * See utypes.h for more details.
136 : *
137 : * As invariant are considered the characters of the ASCII repertoire except
138 : * for the following:
139 : * 21 '!' <exclamation mark>
140 : * 23 '#' <number sign>
141 : * 24 '$' <dollar sign>
142 : *
143 : * 40 '@' <commercial at>
144 : *
145 : * 5b '[' <left bracket>
146 : * 5c '\' <backslash>
147 : * 5d ']' <right bracket>
148 : * 5e '^' <circumflex>
149 : *
150 : * 60 '`' <grave accent>
151 : *
152 : * 7b '{' <left brace>
153 : * 7c '|' <vertical line>
154 : * 7d '}' <right brace>
155 : * 7e '~' <tilde>
156 : */
157 : static const uint32_t invariantChars[4]={
158 : 0xfffffbff, /* 00..1f but not 0a */
159 : 0xffffffe5, /* 20..3f but not 21 23 24 */
160 : 0x87fffffe, /* 40..5f but not 40 5b..5e */
161 : 0x87fffffe /* 60..7f but not 60 7b..7e */
162 : };
163 :
164 : /*
165 : * test unsigned types (or values known to be non-negative) for invariant characters,
166 : * tests ASCII-family character values
167 : */
168 : #define UCHAR_IS_INVARIANT(c) (((c)<=0x7f) && (invariantChars[(c)>>5]&((uint32_t)1<<((c)&0x1f)))!=0)
169 :
170 : /* test signed types for invariant characters, adds test for positive values */
171 : #define SCHAR_IS_INVARIANT(c) ((0<=(c)) && UCHAR_IS_INVARIANT(c))
172 :
173 : #if U_CHARSET_FAMILY==U_ASCII_FAMILY
174 : #define CHAR_TO_UCHAR(c) c
175 : #define UCHAR_TO_CHAR(c) c
176 : #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
177 : #define CHAR_TO_UCHAR(u) asciiFromEbcdic[u]
178 : #define UCHAR_TO_CHAR(u) ebcdicFromAscii[u]
179 : #else
180 : # error U_CHARSET_FAMILY is not valid
181 : #endif
182 :
183 :
184 : U_CAPI void U_EXPORT2
185 0 : u_charsToUChars(const char *cs, UChar *us, int32_t length) {
186 : UChar u;
187 : uint8_t c;
188 :
189 : /*
190 : * Allow the entire ASCII repertoire to be mapped _to_ Unicode.
191 : * For EBCDIC systems, this works for characters with codes from
192 : * codepages 37 and 1047 or compatible.
193 : */
194 0 : while(length>0) {
195 0 : c=(uint8_t)(*cs++);
196 0 : u=(UChar)CHAR_TO_UCHAR(c);
197 0 : U_ASSERT((u!=0 || c==0)); /* only invariant chars converted? */
198 0 : *us++=u;
199 0 : --length;
200 : }
201 0 : }
202 :
203 : U_CAPI void U_EXPORT2
204 24 : u_UCharsToChars(const UChar *us, char *cs, int32_t length) {
205 : UChar u;
206 :
207 46 : while(length>0) {
208 22 : u=*us++;
209 22 : if(!UCHAR_IS_INVARIANT(u)) {
210 0 : U_ASSERT(FALSE); /* Variant characters were used. These are not portable in ICU. */
211 : u=0;
212 : }
213 22 : *cs++=(char)UCHAR_TO_CHAR(u);
214 22 : --length;
215 : }
216 2 : }
217 :
218 : U_CAPI UBool U_EXPORT2
219 0 : uprv_isInvariantString(const char *s, int32_t length) {
220 : uint8_t c;
221 :
222 : for(;;) {
223 0 : if(length<0) {
224 : /* NUL-terminated */
225 0 : c=(uint8_t)*s++;
226 0 : if(c==0) {
227 0 : break;
228 : }
229 : } else {
230 : /* count length */
231 0 : if(length==0) {
232 0 : break;
233 : }
234 0 : --length;
235 0 : c=(uint8_t)*s++;
236 0 : if(c==0) {
237 0 : continue; /* NUL is invariant */
238 : }
239 : }
240 : /* c!=0 now, one branch below checks c==0 for variant characters */
241 :
242 : /*
243 : * no assertions here because these functions are legitimately called
244 : * for strings with variant characters
245 : */
246 : #if U_CHARSET_FAMILY==U_ASCII_FAMILY
247 0 : if(!UCHAR_IS_INVARIANT(c)) {
248 0 : return FALSE; /* found a variant char */
249 : }
250 : #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
251 : c=CHAR_TO_UCHAR(c);
252 : if(c==0 || !UCHAR_IS_INVARIANT(c)) {
253 : return FALSE; /* found a variant char */
254 : }
255 : #else
256 : # error U_CHARSET_FAMILY is not valid
257 : #endif
258 : }
259 0 : return TRUE;
260 : }
261 :
262 : U_CAPI UBool U_EXPORT2
263 0 : uprv_isInvariantUString(const UChar *s, int32_t length) {
264 : UChar c;
265 :
266 : for(;;) {
267 0 : if(length<0) {
268 : /* NUL-terminated */
269 0 : c=*s++;
270 0 : if(c==0) {
271 0 : break;
272 : }
273 : } else {
274 : /* count length */
275 0 : if(length==0) {
276 0 : break;
277 : }
278 0 : --length;
279 0 : c=*s++;
280 : }
281 :
282 : /*
283 : * no assertions here because these functions are legitimately called
284 : * for strings with variant characters
285 : */
286 0 : if(!UCHAR_IS_INVARIANT(c)) {
287 0 : return FALSE; /* found a variant char */
288 : }
289 : }
290 0 : return TRUE;
291 : }
292 :
293 : /* UDataSwapFn implementations used in udataswp.c ------- */
294 :
295 : /* convert ASCII to EBCDIC and verify that all characters are invariant */
296 : U_CAPI int32_t U_EXPORT2
297 0 : uprv_ebcdicFromAscii(const UDataSwapper *ds,
298 : const void *inData, int32_t length, void *outData,
299 : UErrorCode *pErrorCode) {
300 : const uint8_t *s;
301 : uint8_t *t;
302 : uint8_t c;
303 :
304 : int32_t count;
305 :
306 0 : if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
307 0 : return 0;
308 : }
309 0 : if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
310 0 : *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
311 0 : return 0;
312 : }
313 :
314 : /* setup and swapping */
315 0 : s=(const uint8_t *)inData;
316 0 : t=(uint8_t *)outData;
317 0 : count=length;
318 0 : while(count>0) {
319 0 : c=*s++;
320 0 : if(!UCHAR_IS_INVARIANT(c)) {
321 0 : udata_printError(ds, "uprv_ebcdicFromAscii() string[%d] contains a variant character in position %d\n",
322 0 : length, length-count);
323 0 : *pErrorCode=U_INVALID_CHAR_FOUND;
324 0 : return 0;
325 : }
326 0 : *t++=ebcdicFromAscii[c];
327 0 : --count;
328 : }
329 :
330 0 : return length;
331 : }
332 :
333 : /* this function only checks and copies ASCII strings without conversion */
334 : U_CFUNC int32_t
335 0 : uprv_copyAscii(const UDataSwapper *ds,
336 : const void *inData, int32_t length, void *outData,
337 : UErrorCode *pErrorCode) {
338 : const uint8_t *s;
339 : uint8_t c;
340 :
341 : int32_t count;
342 :
343 0 : if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
344 0 : return 0;
345 : }
346 0 : if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
347 0 : *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
348 0 : return 0;
349 : }
350 :
351 : /* setup and checking */
352 0 : s=(const uint8_t *)inData;
353 0 : count=length;
354 0 : while(count>0) {
355 0 : c=*s++;
356 0 : if(!UCHAR_IS_INVARIANT(c)) {
357 0 : udata_printError(ds, "uprv_copyFromAscii() string[%d] contains a variant character in position %d\n",
358 0 : length, length-count);
359 0 : *pErrorCode=U_INVALID_CHAR_FOUND;
360 0 : return 0;
361 : }
362 0 : --count;
363 : }
364 :
365 0 : if(length>0 && inData!=outData) {
366 0 : uprv_memcpy(outData, inData, length);
367 : }
368 :
369 0 : return length;
370 : }
371 :
372 : /* convert EBCDIC to ASCII and verify that all characters are invariant */
373 : U_CFUNC int32_t
374 0 : uprv_asciiFromEbcdic(const UDataSwapper *ds,
375 : const void *inData, int32_t length, void *outData,
376 : UErrorCode *pErrorCode) {
377 : const uint8_t *s;
378 : uint8_t *t;
379 : uint8_t c;
380 :
381 : int32_t count;
382 :
383 0 : if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
384 0 : return 0;
385 : }
386 0 : if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
387 0 : *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
388 0 : return 0;
389 : }
390 :
391 : /* setup and swapping */
392 0 : s=(const uint8_t *)inData;
393 0 : t=(uint8_t *)outData;
394 0 : count=length;
395 0 : while(count>0) {
396 0 : c=*s++;
397 0 : if(c!=0 && ((c=asciiFromEbcdic[c])==0 || !UCHAR_IS_INVARIANT(c))) {
398 0 : udata_printError(ds, "uprv_asciiFromEbcdic() string[%d] contains a variant character in position %d\n",
399 0 : length, length-count);
400 0 : *pErrorCode=U_INVALID_CHAR_FOUND;
401 0 : return 0;
402 : }
403 0 : *t++=c;
404 0 : --count;
405 : }
406 :
407 0 : return length;
408 : }
409 :
410 : /* this function only checks and copies EBCDIC strings without conversion */
411 : U_CFUNC int32_t
412 0 : uprv_copyEbcdic(const UDataSwapper *ds,
413 : const void *inData, int32_t length, void *outData,
414 : UErrorCode *pErrorCode) {
415 : const uint8_t *s;
416 : uint8_t c;
417 :
418 : int32_t count;
419 :
420 0 : if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
421 0 : return 0;
422 : }
423 0 : if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
424 0 : *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
425 0 : return 0;
426 : }
427 :
428 : /* setup and checking */
429 0 : s=(const uint8_t *)inData;
430 0 : count=length;
431 0 : while(count>0) {
432 0 : c=*s++;
433 0 : if(c!=0 && ((c=asciiFromEbcdic[c])==0 || !UCHAR_IS_INVARIANT(c))) {
434 0 : udata_printError(ds, "uprv_copyEbcdic() string[%] contains a variant character in position %d\n",
435 0 : length, length-count);
436 0 : *pErrorCode=U_INVALID_CHAR_FOUND;
437 0 : return 0;
438 : }
439 0 : --count;
440 : }
441 :
442 0 : if(length>0 && inData!=outData) {
443 0 : uprv_memcpy(outData, inData, length);
444 : }
445 :
446 0 : return length;
447 : }
448 :
449 : /* compare invariant strings; variant characters compare less than others and unlike each other */
450 : U_CFUNC int32_t
451 0 : uprv_compareInvAscii(const UDataSwapper *ds,
452 : const char *outString, int32_t outLength,
453 : const UChar *localString, int32_t localLength) {
454 : (void)ds;
455 : int32_t minLength;
456 : UChar32 c1, c2;
457 : uint8_t c;
458 :
459 0 : if(outString==NULL || outLength<-1 || localString==NULL || localLength<-1) {
460 0 : return 0;
461 : }
462 :
463 0 : if(outLength<0) {
464 0 : outLength=(int32_t)uprv_strlen(outString);
465 : }
466 0 : if(localLength<0) {
467 0 : localLength=u_strlen(localString);
468 : }
469 :
470 0 : minLength= outLength<localLength ? outLength : localLength;
471 :
472 0 : while(minLength>0) {
473 0 : c=(uint8_t)*outString++;
474 0 : if(UCHAR_IS_INVARIANT(c)) {
475 0 : c1=c;
476 : } else {
477 0 : c1=-1;
478 : }
479 :
480 0 : c2=*localString++;
481 0 : if(!UCHAR_IS_INVARIANT(c2)) {
482 0 : c2=-2;
483 : }
484 :
485 0 : if((c1-=c2)!=0) {
486 0 : return c1;
487 : }
488 :
489 0 : --minLength;
490 : }
491 :
492 : /* strings start with same prefix, compare lengths */
493 0 : return outLength-localLength;
494 : }
495 :
496 : U_CFUNC int32_t
497 0 : uprv_compareInvEbcdic(const UDataSwapper *ds,
498 : const char *outString, int32_t outLength,
499 : const UChar *localString, int32_t localLength) {
500 : (void)ds;
501 : int32_t minLength;
502 : UChar32 c1, c2;
503 : uint8_t c;
504 :
505 0 : if(outString==NULL || outLength<-1 || localString==NULL || localLength<-1) {
506 0 : return 0;
507 : }
508 :
509 0 : if(outLength<0) {
510 0 : outLength=(int32_t)uprv_strlen(outString);
511 : }
512 0 : if(localLength<0) {
513 0 : localLength=u_strlen(localString);
514 : }
515 :
516 0 : minLength= outLength<localLength ? outLength : localLength;
517 :
518 0 : while(minLength>0) {
519 0 : c=(uint8_t)*outString++;
520 0 : if(c==0) {
521 0 : c1=0;
522 0 : } else if((c1=asciiFromEbcdic[c])!=0 && UCHAR_IS_INVARIANT(c1)) {
523 : /* c1 is set */
524 : } else {
525 0 : c1=-1;
526 : }
527 :
528 0 : c2=*localString++;
529 0 : if(!UCHAR_IS_INVARIANT(c2)) {
530 0 : c2=-2;
531 : }
532 :
533 0 : if((c1-=c2)!=0) {
534 0 : return c1;
535 : }
536 :
537 0 : --minLength;
538 : }
539 :
540 : /* strings start with same prefix, compare lengths */
541 0 : return outLength-localLength;
542 : }
543 :
544 : U_CAPI int32_t U_EXPORT2
545 0 : uprv_compareInvEbcdicAsAscii(const char *s1, const char *s2) {
546 : int32_t c1, c2;
547 :
548 0 : for(;; ++s1, ++s2) {
549 0 : c1=(uint8_t)*s1;
550 0 : c2=(uint8_t)*s2;
551 0 : if(c1!=c2) {
552 0 : if(c1!=0 && ((c1=asciiFromEbcdic[c1])==0 || !UCHAR_IS_INVARIANT(c1))) {
553 0 : c1=-(int32_t)(uint8_t)*s1;
554 : }
555 0 : if(c2!=0 && ((c2=asciiFromEbcdic[c2])==0 || !UCHAR_IS_INVARIANT(c2))) {
556 0 : c2=-(int32_t)(uint8_t)*s2;
557 : }
558 0 : return c1-c2;
559 0 : } else if(c1==0) {
560 0 : return 0;
561 : }
562 : }
563 : }
564 :
565 : U_CAPI char U_EXPORT2
566 0 : uprv_ebcdicToLowercaseAscii(char c) {
567 0 : return (char)lowercaseAsciiFromEbcdic[(uint8_t)c];
568 : }
569 :
570 : U_INTERNAL uint8_t* U_EXPORT2
571 0 : uprv_aestrncpy(uint8_t *dst, const uint8_t *src, int32_t n)
572 : {
573 0 : uint8_t *orig_dst = dst;
574 :
575 0 : if(n==-1) {
576 0 : n = uprv_strlen((const char*)src)+1; /* copy NUL */
577 : }
578 : /* copy non-null */
579 0 : while(*src && n>0) {
580 0 : *(dst++) = asciiFromEbcdic[*(src++)];
581 0 : n--;
582 : }
583 : /* pad */
584 0 : while(n>0) {
585 0 : *(dst++) = 0;
586 0 : n--;
587 : }
588 0 : return orig_dst;
589 : }
590 :
591 : U_INTERNAL uint8_t* U_EXPORT2
592 0 : uprv_eastrncpy(uint8_t *dst, const uint8_t *src, int32_t n)
593 : {
594 0 : uint8_t *orig_dst = dst;
595 :
596 0 : if(n==-1) {
597 0 : n = uprv_strlen((const char*)src)+1; /* copy NUL */
598 : }
599 : /* copy non-null */
600 0 : while(*src && n>0) {
601 0 : char ch = ebcdicFromAscii[*(src++)];
602 0 : if(ch == 0) {
603 0 : ch = ebcdicFromAscii[0x3f]; /* questionmark (subchar) */
604 : }
605 0 : *(dst++) = ch;
606 0 : n--;
607 : }
608 : /* pad */
609 0 : while(n>0) {
610 0 : *(dst++) = 0;
611 0 : n--;
612 : }
613 0 : return orig_dst;
614 : }
615 :
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