summaryrefslogtreecommitdiffstats
path: root/intl/icu/source/common/uinvchar.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'intl/icu/source/common/uinvchar.cpp')
-rw-r--r--intl/icu/source/common/uinvchar.cpp627
1 files changed, 627 insertions, 0 deletions
diff --git a/intl/icu/source/common/uinvchar.cpp b/intl/icu/source/common/uinvchar.cpp
new file mode 100644
index 0000000000..096a8e28d1
--- /dev/null
+++ b/intl/icu/source/common/uinvchar.cpp
@@ -0,0 +1,627 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+* Copyright (C) 1999-2010, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+*******************************************************************************
+* file name: uinvchar.c
+* encoding: UTF-8
+* tab size: 8 (not used)
+* indentation:2
+*
+* created on: 2004sep14
+* created by: Markus W. Scherer
+*
+* Functions for handling invariant characters, moved here from putil.c
+* for better modularization.
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/ustring.h"
+#include "udataswp.h"
+#include "cstring.h"
+#include "cmemory.h"
+#include "uassert.h"
+#include "uinvchar.h"
+
+/* invariant-character handling --------------------------------------------- */
+
+/*
+ * These maps for ASCII to/from EBCDIC map invariant characters (see utypes.h)
+ * appropriately for most EBCDIC codepages.
+ *
+ * They currently also map most other ASCII graphic characters,
+ * appropriately for codepages 37 and 1047.
+ * Exceptions: The characters for []^ have different codes in 37 & 1047.
+ * Both versions are mapped to ASCII.
+ *
+ * ASCII 37 1047
+ * [ 5B BA AD
+ * ] 5D BB BD
+ * ^ 5E B0 5F
+ *
+ * There are no mappings for variant characters from Unicode to EBCDIC.
+ *
+ * Currently, C0 control codes are also included in these maps.
+ * Exceptions: S/390 Open Edition swaps LF and NEL codes compared with other
+ * EBCDIC platforms; both codes (15 and 25) are mapped to ASCII LF (0A),
+ * but there is no mapping for ASCII LF back to EBCDIC.
+ *
+ * ASCII EBCDIC S/390-OE
+ * LF 0A 25 15
+ * NEL 85 15 25
+ *
+ * The maps below explicitly exclude the variant
+ * control and graphical characters that are in ASCII-based
+ * codepages at 0x80 and above.
+ * "No mapping" is expressed by mapping to a 00 byte.
+ *
+ * These tables do not establish a converter or a codepage.
+ */
+
+static const uint8_t asciiFromEbcdic[256]={
+ 0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x00, 0x0a, 0x08, 0x00, 0x18, 0x19, 0x00, 0x00, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x17, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07,
+ 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1a,
+
+ 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
+ 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e,
+ 0x2d, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x25, 0x5f, 0x3e, 0x3f,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
+
+ 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x5b, 0x00, 0x00,
+ 0x5e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5b, 0x5d, 0x00, 0x5d, 0x00, 0x00,
+
+ 0x7b, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x5c, 0x00, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const uint8_t ebcdicFromAscii[256]={
+ 0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f, 0x16, 0x05, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26, 0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x40, 0x00, 0x7f, 0x00, 0x00, 0x6c, 0x50, 0x7d, 0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61,
+ 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f,
+
+ 0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,
+ 0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0x00, 0x00, 0x00, 0x00, 0x6d,
+ 0x00, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,
+ 0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0x00, 0x00, 0x00, 0x00, 0x07,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/* Same as asciiFromEbcdic[] except maps all letters to lowercase. */
+static const uint8_t lowercaseAsciiFromEbcdic[256]={
+ 0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x00, 0x0a, 0x08, 0x00, 0x18, 0x19, 0x00, 0x00, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x17, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07,
+ 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1a,
+
+ 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
+ 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e,
+ 0x2d, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x25, 0x5f, 0x3e, 0x3f,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
+
+ 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x5b, 0x00, 0x00,
+ 0x5e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5b, 0x5d, 0x00, 0x5d, 0x00, 0x00,
+
+ 0x7b, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x7d, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x7c, 0x00, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+/*
+ * Bit sets indicating which characters of the ASCII repertoire
+ * (by ASCII/Unicode code) are "invariant".
+ * See utypes.h for more details.
+ *
+ * As invariant are considered the characters of the ASCII repertoire except
+ * for the following:
+ * 21 '!' <exclamation mark>
+ * 23 '#' <number sign>
+ * 24 '$' <dollar sign>
+ *
+ * 40 '@' <commercial at>
+ *
+ * 5b '[' <left bracket>
+ * 5c '\' <backslash>
+ * 5d ']' <right bracket>
+ * 5e '^' <circumflex>
+ *
+ * 60 '`' <grave accent>
+ *
+ * 7b '{' <left brace>
+ * 7c '|' <vertical line>
+ * 7d '}' <right brace>
+ * 7e '~' <tilde>
+ */
+static const uint32_t invariantChars[4]={
+ 0xfffffbff, /* 00..1f but not 0a */
+ 0xffffffe5, /* 20..3f but not 21 23 24 */
+ 0x87fffffe, /* 40..5f but not 40 5b..5e */
+ 0x87fffffe /* 60..7f but not 60 7b..7e */
+};
+
+/*
+ * test unsigned types (or values known to be non-negative) for invariant characters,
+ * tests ASCII-family character values
+ */
+#define UCHAR_IS_INVARIANT(c) (((c)<=0x7f) && (invariantChars[(c)>>5]&((uint32_t)1<<((c)&0x1f)))!=0)
+
+/* test signed types for invariant characters, adds test for positive values */
+#define SCHAR_IS_INVARIANT(c) ((0<=(c)) && UCHAR_IS_INVARIANT(c))
+
+#if U_CHARSET_FAMILY==U_ASCII_FAMILY
+#define CHAR_TO_UCHAR(c) c
+#define UCHAR_TO_CHAR(c) c
+#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
+#define CHAR_TO_UCHAR(u) asciiFromEbcdic[u]
+#define UCHAR_TO_CHAR(u) ebcdicFromAscii[u]
+#else
+# error U_CHARSET_FAMILY is not valid
+#endif
+
+
+U_CAPI void U_EXPORT2
+u_charsToUChars(const char *cs, char16_t *us, int32_t length) {
+ char16_t u;
+ uint8_t c;
+
+ /*
+ * Allow the entire ASCII repertoire to be mapped _to_ Unicode.
+ * For EBCDIC systems, this works for characters with codes from
+ * codepages 37 and 1047 or compatible.
+ */
+ while(length>0) {
+ c=(uint8_t)(*cs++);
+ u=(char16_t)CHAR_TO_UCHAR(c);
+ U_ASSERT((u!=0 || c==0)); /* only invariant chars converted? */
+ *us++=u;
+ --length;
+ }
+}
+
+U_CAPI void U_EXPORT2
+u_UCharsToChars(const char16_t *us, char *cs, int32_t length) {
+ char16_t u;
+
+ while(length>0) {
+ u=*us++;
+ if(!UCHAR_IS_INVARIANT(u)) {
+ U_ASSERT(false); /* Variant characters were used. These are not portable in ICU. */
+ u=0;
+ }
+ *cs++=(char)UCHAR_TO_CHAR(u);
+ --length;
+ }
+}
+
+U_CAPI UBool U_EXPORT2
+uprv_isInvariantString(const char *s, int32_t length) {
+ uint8_t c;
+
+ for(;;) {
+ if(length<0) {
+ /* NUL-terminated */
+ c=(uint8_t)*s++;
+ if(c==0) {
+ break;
+ }
+ } else {
+ /* count length */
+ if(length==0) {
+ break;
+ }
+ --length;
+ c=(uint8_t)*s++;
+ if(c==0) {
+ continue; /* NUL is invariant */
+ }
+ }
+ /* c!=0 now, one branch below checks c==0 for variant characters */
+
+ /*
+ * no assertions here because these functions are legitimately called
+ * for strings with variant characters
+ */
+#if U_CHARSET_FAMILY==U_ASCII_FAMILY
+ if(!UCHAR_IS_INVARIANT(c)) {
+ return false; /* found a variant char */
+ }
+#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
+ c=CHAR_TO_UCHAR(c);
+ if(c==0 || !UCHAR_IS_INVARIANT(c)) {
+ return false; /* found a variant char */
+ }
+#else
+# error U_CHARSET_FAMILY is not valid
+#endif
+ }
+ return true;
+}
+
+U_CAPI UBool U_EXPORT2
+uprv_isInvariantUString(const char16_t *s, int32_t length) {
+ char16_t c;
+
+ for(;;) {
+ if(length<0) {
+ /* NUL-terminated */
+ c=*s++;
+ if(c==0) {
+ break;
+ }
+ } else {
+ /* count length */
+ if(length==0) {
+ break;
+ }
+ --length;
+ c=*s++;
+ }
+
+ /*
+ * no assertions here because these functions are legitimately called
+ * for strings with variant characters
+ */
+ if(!UCHAR_IS_INVARIANT(c)) {
+ return false; /* found a variant char */
+ }
+ }
+ return true;
+}
+
+/* UDataSwapFn implementations used in udataswp.c ------- */
+
+/* convert ASCII to EBCDIC and verify that all characters are invariant */
+U_CAPI int32_t U_EXPORT2
+uprv_ebcdicFromAscii(const UDataSwapper *ds,
+ const void *inData, int32_t length, void *outData,
+ UErrorCode *pErrorCode) {
+ const uint8_t *s;
+ uint8_t *t;
+ uint8_t c;
+
+ int32_t count;
+
+ if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ if(ds==nullptr || inData==nullptr || length<0 || (length>0 && outData==nullptr)) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* setup and swapping */
+ s=(const uint8_t *)inData;
+ t=(uint8_t *)outData;
+ count=length;
+ while(count>0) {
+ c=*s++;
+ if(!UCHAR_IS_INVARIANT(c)) {
+ udata_printError(ds, "uprv_ebcdicFromAscii() string[%d] contains a variant character in position %d\n",
+ length, length-count);
+ *pErrorCode=U_INVALID_CHAR_FOUND;
+ return 0;
+ }
+ *t++=ebcdicFromAscii[c];
+ --count;
+ }
+
+ return length;
+}
+
+/* this function only checks and copies ASCII strings without conversion */
+U_CFUNC int32_t
+uprv_copyAscii(const UDataSwapper *ds,
+ const void *inData, int32_t length, void *outData,
+ UErrorCode *pErrorCode) {
+ const uint8_t *s;
+ uint8_t c;
+
+ int32_t count;
+
+ if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ if(ds==nullptr || inData==nullptr || length<0 || (length>0 && outData==nullptr)) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* setup and checking */
+ s=(const uint8_t *)inData;
+ count=length;
+ while(count>0) {
+ c=*s++;
+ if(!UCHAR_IS_INVARIANT(c)) {
+ udata_printError(ds, "uprv_copyFromAscii() string[%d] contains a variant character in position %d\n",
+ length, length-count);
+ *pErrorCode=U_INVALID_CHAR_FOUND;
+ return 0;
+ }
+ --count;
+ }
+
+ if(length>0 && inData!=outData) {
+ uprv_memcpy(outData, inData, length);
+ }
+
+ return length;
+}
+
+/* convert EBCDIC to ASCII and verify that all characters are invariant */
+U_CFUNC int32_t
+uprv_asciiFromEbcdic(const UDataSwapper *ds,
+ const void *inData, int32_t length, void *outData,
+ UErrorCode *pErrorCode) {
+ const uint8_t *s;
+ uint8_t *t;
+ uint8_t c;
+
+ int32_t count;
+
+ if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ if(ds==nullptr || inData==nullptr || length<0 || (length>0 && outData==nullptr)) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* setup and swapping */
+ s=(const uint8_t *)inData;
+ t=(uint8_t *)outData;
+ count=length;
+ while(count>0) {
+ c=*s++;
+ if(c!=0 && ((c=asciiFromEbcdic[c])==0 || !UCHAR_IS_INVARIANT(c))) {
+ udata_printError(ds, "uprv_asciiFromEbcdic() string[%d] contains a variant character in position %d\n",
+ length, length-count);
+ *pErrorCode=U_INVALID_CHAR_FOUND;
+ return 0;
+ }
+ *t++=c;
+ --count;
+ }
+
+ return length;
+}
+
+/* this function only checks and copies EBCDIC strings without conversion */
+U_CFUNC int32_t
+uprv_copyEbcdic(const UDataSwapper *ds,
+ const void *inData, int32_t length, void *outData,
+ UErrorCode *pErrorCode) {
+ const uint8_t *s;
+ uint8_t c;
+
+ int32_t count;
+
+ if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ if(ds==nullptr || inData==nullptr || length<0 || (length>0 && outData==nullptr)) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* setup and checking */
+ s=(const uint8_t *)inData;
+ count=length;
+ while(count>0) {
+ c=*s++;
+ if(c!=0 && ((c=asciiFromEbcdic[c])==0 || !UCHAR_IS_INVARIANT(c))) {
+ udata_printError(ds, "uprv_copyEbcdic() string[%] contains a variant character in position %d\n",
+ length, length-count);
+ *pErrorCode=U_INVALID_CHAR_FOUND;
+ return 0;
+ }
+ --count;
+ }
+
+ if(length>0 && inData!=outData) {
+ uprv_memcpy(outData, inData, length);
+ }
+
+ return length;
+}
+
+U_CFUNC UBool
+uprv_isEbcdicAtSign(char c) {
+ static const uint8_t ebcdicAtSigns[] = {
+ 0x7C, 0x44, 0x66, 0x80, 0xAC, 0xAE, 0xAF, 0xB5, 0xEC, 0xEF, 0x00 };
+ return c != 0 && uprv_strchr((const char *)ebcdicAtSigns, c) != nullptr;
+}
+
+/* compare invariant strings; variant characters compare less than others and unlike each other */
+U_CFUNC int32_t
+uprv_compareInvAscii(const UDataSwapper *ds,
+ const char *outString, int32_t outLength,
+ const char16_t *localString, int32_t localLength) {
+ (void)ds;
+ int32_t minLength;
+ UChar32 c1, c2;
+ uint8_t c;
+
+ if(outString==nullptr || outLength<-1 || localString==nullptr || localLength<-1) {
+ return 0;
+ }
+
+ if(outLength<0) {
+ outLength=(int32_t)uprv_strlen(outString);
+ }
+ if(localLength<0) {
+ localLength=u_strlen(localString);
+ }
+
+ minLength= outLength<localLength ? outLength : localLength;
+
+ while(minLength>0) {
+ c=(uint8_t)*outString++;
+ if(UCHAR_IS_INVARIANT(c)) {
+ c1=c;
+ } else {
+ c1=-1;
+ }
+
+ c2=*localString++;
+ if(!UCHAR_IS_INVARIANT(c2)) {
+ c2=-2;
+ }
+
+ if((c1-=c2)!=0) {
+ return c1;
+ }
+
+ --minLength;
+ }
+
+ /* strings start with same prefix, compare lengths */
+ return outLength-localLength;
+}
+
+U_CFUNC int32_t
+uprv_compareInvEbcdic(const UDataSwapper *ds,
+ const char *outString, int32_t outLength,
+ const char16_t *localString, int32_t localLength) {
+ (void)ds;
+ int32_t minLength;
+ UChar32 c1, c2;
+ uint8_t c;
+
+ if(outString==nullptr || outLength<-1 || localString==nullptr || localLength<-1) {
+ return 0;
+ }
+
+ if(outLength<0) {
+ outLength=(int32_t)uprv_strlen(outString);
+ }
+ if(localLength<0) {
+ localLength=u_strlen(localString);
+ }
+
+ minLength= outLength<localLength ? outLength : localLength;
+
+ while(minLength>0) {
+ c=(uint8_t)*outString++;
+ if(c==0) {
+ c1=0;
+ } else if((c1=asciiFromEbcdic[c])!=0 && UCHAR_IS_INVARIANT(c1)) {
+ /* c1 is set */
+ } else {
+ c1=-1;
+ }
+
+ c2=*localString++;
+ if(!UCHAR_IS_INVARIANT(c2)) {
+ c2=-2;
+ }
+
+ if((c1-=c2)!=0) {
+ return c1;
+ }
+
+ --minLength;
+ }
+
+ /* strings start with same prefix, compare lengths */
+ return outLength-localLength;
+}
+
+U_CAPI int32_t U_EXPORT2
+uprv_compareInvEbcdicAsAscii(const char *s1, const char *s2) {
+ int32_t c1, c2;
+
+ for(;; ++s1, ++s2) {
+ c1=(uint8_t)*s1;
+ c2=(uint8_t)*s2;
+ if(c1!=c2) {
+ if(c1!=0 && ((c1=asciiFromEbcdic[c1])==0 || !UCHAR_IS_INVARIANT(c1))) {
+ c1=-(int32_t)(uint8_t)*s1;
+ }
+ if(c2!=0 && ((c2=asciiFromEbcdic[c2])==0 || !UCHAR_IS_INVARIANT(c2))) {
+ c2=-(int32_t)(uint8_t)*s2;
+ }
+ return c1-c2;
+ } else if(c1==0) {
+ return 0;
+ }
+ }
+}
+
+U_CAPI char U_EXPORT2
+uprv_ebcdicToAscii(char c) {
+ return (char)asciiFromEbcdic[(uint8_t)c];
+}
+
+U_CAPI char U_EXPORT2
+uprv_ebcdicToLowercaseAscii(char c) {
+ return (char)lowercaseAsciiFromEbcdic[(uint8_t)c];
+}
+
+U_CAPI uint8_t* U_EXPORT2
+uprv_aestrncpy(uint8_t *dst, const uint8_t *src, int32_t n)
+{
+ uint8_t *orig_dst = dst;
+
+ if(n==-1) {
+ n = static_cast<int32_t>(uprv_strlen((const char*)src)+1); /* copy NUL */
+ }
+ /* copy non-null */
+ while(*src && n>0) {
+ *(dst++) = asciiFromEbcdic[*(src++)];
+ n--;
+ }
+ /* pad */
+ while(n>0) {
+ *(dst++) = 0;
+ n--;
+ }
+ return orig_dst;
+}
+
+U_CAPI uint8_t* U_EXPORT2
+uprv_eastrncpy(uint8_t *dst, const uint8_t *src, int32_t n)
+{
+ uint8_t *orig_dst = dst;
+
+ if(n==-1) {
+ n = static_cast<int32_t>(uprv_strlen((const char*)src)+1); /* copy NUL */
+ }
+ /* copy non-null */
+ while(*src && n>0) {
+ char ch = ebcdicFromAscii[*(src++)];
+ if(ch == 0) {
+ ch = ebcdicFromAscii[0x3f]; /* questionmark (subchar) */
+ }
+ *(dst++) = ch;
+ n--;
+ }
+ /* pad */
+ while(n>0) {
+ *(dst++) = 0;
+ n--;
+ }
+ return orig_dst;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 07:11:39 +0000