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scuffed-code/icu4c/source/samples/uciter8/uciter8.c
Yoshito Umaoka 53c2cc2c4c ICU-12793 Fixes in sample code. 
X-SVN-Rev: 39803
2017-03-14 21:37:41 +00:00

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/*
*******************************************************************************
*
* © 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;
}
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