FM / uciter8

/usr/share/doc/libicu-devel/samples/uciter8/

/usr/share/doc/libicu-devel/samples/uciter8

Name	Size	Mode	Actions
Makefile	600	0644	edit dl rm
readme.txt	2917	0644	edit dl rm
uciter8.c	11084	0644	edit dl rm
uciter8.sln	1204	0644	edit dl rm
uciter8.vcxproj	9245	0644	edit dl rm
uciter8.vcxproj.filters	1089	0644	edit dl rm
uit_len8.c	18047	0644	edit dl rm
uit_len8.h	1043	0644	edit dl rm

Edit: /usr/share/doc/libicu-devel/samples/uciter8/uciter8.c (11084B)

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

cmd: