← Back
Editing: uciter8.c
/* ******************************************************************************* * * © 2016 and later: Unicode, Inc. and others. * License & terms of use: http://www.unicode.org/copyright.html#License * ******************************************************************************* ******************************************************************************* * * Copyright (C) 2003-2014, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: uciter8.c * encoding: UTF-8 * tab size: 8 (not used) * indentation:4 * * created on: 2003jan10 * created by: Markus W. Scherer * * This file contains sample code that illustrates reading * 8-bit Unicode text leniently, accepting a mix of UTF-8 and CESU-8 * and also accepting single surrogates. */ #include <stdio.h> #include <string.h> #include "unicode/utypes.h" #include "unicode/uiter.h" #include "uit_len8.h" #ifndef UPRV_LENGTHOF #define UPRV_LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0])) #endif #define log_err printf /* UCharIterator test ------------------------------------------------------- */ /* * The following code is a copy of the UCharIterator test code in * source/test/cintltst/custrtst.c, * testing the lenient-8 iterator instead of the UTF-8 one. */ /* * Compare results from two iterators, should be same. * Assume that the text is not empty and that * iteration start==0 and iteration limit==length. */ static void compareIterators(UCharIterator *iter1, const char *n1, UCharIterator *iter2, const char *n2) { int32_t i, pos1, pos2, middle, length; UChar32 c1, c2; /* compare lengths */ length=iter1->getIndex(iter1, UITER_LENGTH); pos2=iter2->getIndex(iter2, UITER_LENGTH); if(length!=pos2) { log_err("%s->getIndex(length)=%d != %d=%s->getIndex(length)\n", n1, length, pos2, n2); return; } /* set into the middle */ middle=length/2; pos1=iter1->move(iter1, middle, UITER_ZERO); if(pos1!=middle) { log_err("%s->move(from 0 to middle %d)=%d does not move to the middle\n", n1, middle, pos1); return; } pos2=iter2->move(iter2, middle, UITER_ZERO); if(pos2!=middle) { log_err("%s->move(from 0 to middle %d)=%d does not move to the middle\n", n2, middle, pos2); return; } /* test current() */ c1=iter1->current(iter1); c2=iter2->current(iter2); if(c1!=c2) { log_err("%s->current()=U+%04x != U+%04x=%s->current() at middle=%d\n", n1, c1, c2, n2, middle); return; } /* move forward 3 UChars */ for(i=0; i<3; ++i) { c1=iter1->next(iter1); c2=iter2->next(iter2); if(c1!=c2) { log_err("%s->next()=U+%04x != U+%04x=%s->next() at %d (started in middle)\n", n1, c1, c2, n2, iter1->getIndex(iter1, UITER_CURRENT)); return; } } /* move backward 5 UChars */ for(i=0; i<5; ++i) { c1=iter1->previous(iter1); c2=iter2->previous(iter2); if(c1!=c2) { log_err("%s->previous()=U+%04x != U+%04x=%s->previous() at %d (started in middle)\n", n1, c1, c2, n2, iter1->getIndex(iter1, UITER_CURRENT)); return; } } /* iterate forward from the beginning */ pos1=iter1->move(iter1, 0, UITER_START); if(pos1<0) { log_err("%s->move(start) failed\n", n1); return; } if(!iter1->hasNext(iter1)) { log_err("%s->hasNext() at the start returns FALSE\n", n1); return; } pos2=iter2->move(iter2, 0, UITER_START); if(pos2<0) { log_err("%s->move(start) failed\n", n2); return; } if(!iter2->hasNext(iter2)) { log_err("%s->hasNext() at the start returns FALSE\n", n2); return; } do { c1=iter1->next(iter1); c2=iter2->next(iter2); if(c1!=c2) { log_err("%s->next()=U+%04x != U+%04x=%s->next() at %d\n", n1, c1, c2, n2, iter1->getIndex(iter1, UITER_CURRENT)); return; } } while(c1>=0); if(iter1->hasNext(iter1)) { log_err("%s->hasNext() at the end returns TRUE\n", n1); return; } if(iter2->hasNext(iter2)) { log_err("%s->hasNext() at the end returns TRUE\n", n2); return; } /* back to the middle */ pos1=iter1->move(iter1, middle, UITER_ZERO); if(pos1!=middle) { log_err("%s->move(from end to middle %d)=%d does not move to the middle\n", n1, middle, pos1); return; } pos2=iter2->move(iter2, middle, UITER_ZERO); if(pos2!=middle) { log_err("%s->move(from end to middle %d)=%d does not move to the middle\n", n2, middle, pos2); return; } /* move to index 1 */ pos1=iter1->move(iter1, 1, UITER_ZERO); if(pos1!=1) { log_err("%s->move(from middle %d to 1)=%d does not move to 1\n", n1, middle, pos1); return; } pos2=iter2->move(iter2, 1, UITER_ZERO); if(pos2!=1) { log_err("%s->move(from middle %d to 1)=%d does not move to 1\n", n2, middle, pos2); return; } /* iterate backward from the end */ pos1=iter1->move(iter1, 0, UITER_LIMIT); if(pos1<0) { log_err("%s->move(limit) failed\n", n1); return; } if(!iter1->hasPrevious(iter1)) { log_err("%s->hasPrevious() at the end returns FALSE\n", n1); return; } pos2=iter2->move(iter2, 0, UITER_LIMIT); if(pos2<0) { log_err("%s->move(limit) failed\n", n2); return; } if(!iter2->hasPrevious(iter2)) { log_err("%s->hasPrevious() at the end returns FALSE\n", n2); return; } do { c1=iter1->previous(iter1); c2=iter2->previous(iter2); if(c1!=c2) { log_err("%s->previous()=U+%04x != U+%04x=%s->previous() at %d\n", n1, c1, c2, n2, iter1->getIndex(iter1, UITER_CURRENT)); return; } } while(c1>=0); if(iter1->hasPrevious(iter1)) { log_err("%s->hasPrevious() at the start returns TRUE\n", n1); return; } if(iter2->hasPrevious(iter2)) { log_err("%s->hasPrevious() at the start returns TRUE\n", n2); return; } } /* * Test the iterator's getState() and setState() functions. * iter1 and iter2 must be set up for the same iterator type and the same string * but may be physically different structs (different addresses). * * Assume that the text is not empty and that * iteration start==0 and iteration limit==length. * It must be 2<=middle<=length-2. */ static void testIteratorState(UCharIterator *iter1, UCharIterator *iter2, const char *n, int32_t middle) { UChar32 u[4]; UErrorCode errorCode; UChar32 c; uint32_t state; int32_t i, j; /* get four UChars from the middle of the string */ iter1->move(iter1, middle-2, UITER_ZERO); for(i=0; i<4; ++i) { c=iter1->next(iter1); if(c<0) { /* the test violates the assumptions, see comment above */ log_err("test error: %s[%d]=%d\n", n, middle-2+i, c); return; } u[i]=c; } /* move to the middle and get the state */ iter1->move(iter1, -2, UITER_CURRENT); state=uiter_getState(iter1); /* set the state into the second iterator and compare the results */ errorCode=U_ZERO_ERROR; uiter_setState(iter2, state, &errorCode); if(U_FAILURE(errorCode)) { log_err("%s->setState(0x%x) failed: %s\n", n, state, u_errorName(errorCode)); return; } c=iter2->current(iter2); if(c!=u[2]) { log_err("%s->current(at %d)=U+%04x!=U+%04x\n", n, middle, c, u[2]); } c=iter2->previous(iter2); if(c!=u[1]) { log_err("%s->previous(at %d)=U+%04x!=U+%04x\n", n, middle-1, c, u[1]); } iter2->move(iter2, 2, UITER_CURRENT); c=iter2->next(iter2); if(c!=u[3]) { log_err("%s->next(at %d)=U+%04x!=U+%04x\n", n, middle+1, c, u[3]); } iter2->move(iter2, -3, UITER_CURRENT); c=iter2->previous(iter2); if(c!=u[0]) { log_err("%s->previous(at %d)=U+%04x!=U+%04x\n", n, middle-2, c, u[0]); } /* move the second iterator back to the middle */ iter2->move(iter2, 1, UITER_CURRENT); iter2->next(iter2); /* check that both are in the middle */ i=iter1->getIndex(iter1, UITER_CURRENT); j=iter2->getIndex(iter2, UITER_CURRENT); if(i!=middle) { log_err("%s->getIndex(current)=%d!=%d as expected\n", n, i, middle); } if(i!=j) { log_err("%s->getIndex(current)=%d!=%d after setState()\n", n, j, i); } /* compare lengths */ i=iter1->getIndex(iter1, UITER_LENGTH); j=iter2->getIndex(iter2, UITER_LENGTH); if(i!=j) { log_err("%s->getIndex(length)=%d!=%d before/after setState()\n", n, i, j); } } static void TestLenient8Iterator() { static const UChar text[]={ 0x61, 0x62, 0x63, /* dffd 107fd d801 dffd - in UTF-16, U+107fd=<d801 dffd> */ 0xdffd, 0xd801, 0xdffd, 0xd801, 0xdffd, 0x78, 0x79, 0x7a, 0 }; static const uint8_t bytes[]={ 0x61, 0x62, 0x63, /* dffd 107fd d801 dffd - mixture */ 0xed, 0xbf, 0xbd, 0xf0, 0x90, 0x9f, 0xbd, 0xed, 0xa0, 0x81, 0xed, 0xbf, 0xbd, 0x78, 0x79, 0x7a, 0 }; UCharIterator iter1, iter2; UChar32 c1, c2; int32_t length; puts("test a UCharIterator for lenient 8-bit Unicode (accept single surrogates)"); /* compare the same string between UTF-16 and lenient-8 UCharIterators */ uiter_setString(&iter1, text, -1); uiter_setLenient8(&iter2, (const char *)bytes, sizeof(bytes)-1); compareIterators(&iter1, "UTF16Iterator", &iter2, "Lenient8Iterator"); /* try again with length=-1 */ uiter_setLenient8(&iter2, (const char *)bytes, -1); compareIterators(&iter1, "UTF16Iterator", &iter2, "Lenient8Iterator_1"); /* test get/set state */ length=UPRV_LENGTHOF(text)-1; uiter_setLenient8(&iter1, (const char*)bytes, -1); testIteratorState(&iter1, &iter2, "Lenient8IteratorState", length/2); testIteratorState(&iter1, &iter2, "Lenient8IteratorStatePlus1", length/2+1); /* ---------------------------------------------------------------------- */ puts("no output so far means that the lenient-8 iterator works fine"); puts("iterate forward:\nUTF-16\tlenient-8"); uiter_setString(&iter1, text, -1); iter1.move(&iter1, 0, UITER_START); iter2.move(&iter2, 0, UITER_START); for(;;) { c1=iter1.next(&iter1); c2=iter2.next(&iter2); if(c1<0 && c2<0) { break; } if(c1<0) { printf("\t%04x\n", c2); } else if(c2<0) { printf("%04x\n", c1); } else { printf("%04x\t%04x\n", c1, c2); } } } extern int main(int argc, const char *argv[]) { TestLenient8Iterator(); return 0; }
Save File
Cancel