Check in the pristine copy of ICU 4.6...

icu46/source/test/cintltst/ucsdetst.c

+/*
+ ****************************************************************************
+ * Copyright (c) 2005-2009, International Business Machines Corporation and *
+ * others. All Rights Reserved.                                             *
+ ****************************************************************************
+ */
+
+#include "unicode/utypes.h"
+
+#include "unicode/ucsdet.h"
+#include "unicode/ucnv.h"
+#include "unicode/ustring.h"
+
+#include "cintltst.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#define ARRAY_SIZE(array) (sizeof(array)/sizeof(array[0]))
+
+#define NEW_ARRAY(type,count) (type *) malloc((count) * sizeof(type))
+#define DELETE_ARRAY(array) free(array)
+
+static void TestConstruction(void);
+static void TestUTF8(void);
+static void TestUTF16(void);
+static void TestC1Bytes(void);
+static void TestInputFilter(void);
+static void TestChaining(void);
+static void TestBufferOverflow(void);
+static void TestIBM424(void);
+static void TestIBM420(void);
+
+void addUCsdetTest(TestNode** root);
+
+void addUCsdetTest(TestNode** root)
+{
+    addTest(root, &TestConstruction, "ucsdetst/TestConstruction");
+    addTest(root, &TestUTF8, "ucsdetst/TestUTF8");
+    addTest(root, &TestUTF16, "ucsdetst/TestUTF16");
+    addTest(root, &TestC1Bytes, "ucsdetst/TestC1Bytes");
+    addTest(root, &TestInputFilter, "ucsdetst/TestInputFilter");
+    addTest(root, &TestChaining, "ucsdetst/TestErrorChaining");
+    addTest(root, &TestBufferOverflow, "ucsdetst/TestBufferOverflow");
+#if !UCONFIG_NO_LEGACY_CONVERSION
+    addTest(root, &TestIBM424, "ucsdetst/TestIBM424");
+    addTest(root, &TestIBM420, "ucsdetst/TestIBM420");
+#endif
+}
+
+static int32_t preflight(const UChar *src, int32_t length, UConverter *cnv)
+{
+    UErrorCode status;
+    char buffer[1024];
+    char *dest, *destLimit = buffer + sizeof(buffer);
+    const UChar *srcLimit = src + length;
+    int32_t result = 0;
+
+    do {
+        dest = buffer;
+        status = U_ZERO_ERROR;
+        ucnv_fromUnicode(cnv, &dest, destLimit, &src, srcLimit, 0, TRUE, &status);
+        result += (int32_t) (dest - buffer);
+    } while (status == U_BUFFER_OVERFLOW_ERROR);
+
+    return result;
+}
+
+static char *extractBytes(const UChar *src, int32_t length, const char *codepage, int32_t *byteLength)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UConverter *cnv = ucnv_open(codepage, &status);
+    int32_t byteCount = preflight(src, length, cnv);
+    const UChar *srcLimit = src + length;
+    char *bytes = NEW_ARRAY(char, byteCount + 1);
+    char *dest = bytes, *destLimit = bytes + byteCount + 1;
+
+    ucnv_fromUnicode(cnv, &dest, destLimit, &src, srcLimit, 0, TRUE, &status);
+    ucnv_close(cnv);
+
+    *byteLength = byteCount;
+    return bytes;
+}
+
+static void freeBytes(char *bytes)
+{
+    DELETE_ARRAY(bytes);
+}
+
+static void TestConstruction(void)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UCharsetDetector *csd = ucsdet_open(&status);
+    UEnumeration *e = ucsdet_getAllDetectableCharsets(csd, &status);
+    const char *name;
+    int32_t count = uenum_count(e, &status);
+    int32_t i, length;
+
+    for(i = 0; i < count; i += 1) {
+        name = uenum_next(e, &length, &status);
+
+        if(name == NULL || length <= 0) {
+            log_err("ucsdet_getAllDetectableCharsets() returned a null or empty name!\n");
+        }
+    }
+    /* one past the list of all names must return NULL */
+    name = uenum_next(e, &length, &status);
+    if(name != NULL || length != 0 || U_FAILURE(status)) {
+        log_err("ucsdet_getAllDetectableCharsets(past the list) returned a non-null name!\n");
+    }
+
+    uenum_close(e);
+    ucsdet_close(csd);
+}
+
+static void TestUTF8(void)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    static const char ss[] = "This is a string with some non-ascii characters that will "
+               "be converted to UTF-8, then shoved through the detection process.  "
+               "\\u0391\\u0392\\u0393\\u0394\\u0395"
+               "Sure would be nice if our source could contain Unicode directly!";
+    int32_t byteLength = 0, sLength = 0, dLength = 0;
+    UChar s[sizeof(ss)];
+    char *bytes;
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    UChar detected[sizeof(ss)];
+
+    sLength = u_unescape(ss, s, sizeof(ss));
+    bytes = extractBytes(s, sLength, "UTF-8", &byteLength);
+
+    ucsdet_setText(csd, bytes, byteLength, &status);
+    if (U_FAILURE(status)) {
+        log_err("status is %s\n", u_errorName(status));
+        goto bail;
+    }
+
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Detection failure for UTF-8: got no matches.\n");
+        goto bail;
+    }
+
+    dLength = ucsdet_getUChars(match, detected, sLength, &status);
+
+    if (u_strCompare(detected, dLength, s, sLength, FALSE) != 0) {
+        log_err("Round-trip test failed!\n");
+    }
+
+    ucsdet_setDeclaredEncoding(csd, "UTF-8", 5, &status); /* for coverage */
+
+bail:
+    freeBytes(bytes);
+    ucsdet_close(csd);
+}
+
+static void TestUTF16(void)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    /* Notice the BOM on the start of this string */
+    static const UChar chars[] = {
+        0xFEFF, 0x0623, 0x0648, 0x0631, 0x0648, 0x0628, 0x0627, 0x002C,
+        0x0020, 0x0628, 0x0631, 0x0645, 0x062c, 0x064a, 0x0627, 0x062a,
+        0x0020, 0x0627, 0x0644, 0x062d, 0x0627, 0x0633, 0x0648, 0x0628,
+        0x0020, 0x002b, 0x0020, 0x0627, 0x0646, 0x062a, 0x0631, 0x0646,
+        0x064a, 0x062a, 0x0000};
+    int32_t beLength = 0, leLength = 0, cLength = ARRAY_SIZE(chars);
+    char *beBytes = extractBytes(chars, cLength, "UTF-16BE", &beLength);
+    char *leBytes = extractBytes(chars, cLength, "UTF-16LE", &leLength);
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *name;
+    int32_t conf;
+
+    ucsdet_setText(csd, beBytes, beLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Encoding detection failure for UTF-16BE: got no matches.\n");
+        goto try_le;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    conf  = ucsdet_getConfidence(match, &status);
+
+    if (strcmp(name, "UTF-16BE") != 0) {
+        log_err("Encoding detection failure for UTF-16BE: got %s\n", name);
+    }
+
+    if (conf != 100) {
+        log_err("Did not get 100%% confidence for UTF-16BE: got %d\n", conf);
+    }
+
+try_le:
+    ucsdet_setText(csd, leBytes, leLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Encoding detection failure for UTF-16LE: got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    conf = ucsdet_getConfidence(match, &status);
+
+
+    if (strcmp(name, "UTF-16LE") != 0) {
+        log_err("Enconding detection failure for UTF-16LE: got %s\n", name);
+    }
+
+    if (conf != 100) {
+        log_err("Did not get 100%% confidence for UTF-16LE: got %d\n", conf);
+    }
+
+bail:
+    freeBytes(leBytes);
+    freeBytes(beBytes);
+    ucsdet_close(csd);
+}
+
+static void TestC1Bytes(void)
+{
+#if !UCONFIG_NO_LEGACY_CONVERSION
+    UErrorCode status = U_ZERO_ERROR;
+    static const char ssISO[] = "This is a small sample of some English text. Just enough to be sure that it detects correctly.";
+    static const char ssWindows[] = "This is another small sample of some English text. Just enough to be sure that it detects correctly. It also includes some \\u201CC1\\u201D bytes.";
+    int32_t sISOLength = 0, sWindowsLength = 0;
+    UChar sISO[sizeof(ssISO)];
+    UChar sWindows[sizeof(ssWindows)];
+    int32_t lISO = 0, lWindows = 0;
+    char *bISO;
+    char *bWindows;
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *name;
+
+    sISOLength = u_unescape(ssISO, sISO, sizeof(ssISO));
+    sWindowsLength = u_unescape(ssWindows, sWindows, sizeof(ssWindows));
+    bISO = extractBytes(sISO, sISOLength, "ISO-8859-1", &lISO);
+    bWindows = extractBytes(sWindows, sWindowsLength, "windows-1252", &lWindows);
+
+    ucsdet_setText(csd, bWindows, lWindows, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("English test with C1 bytes got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+
+    if (strcmp(name, "windows-1252") != 0) {
+        log_data_err("English text with C1 bytes does not detect as windows-1252, but as %s. (Are you missing data?)\n", name);
+    }
+
+    ucsdet_setText(csd, bISO, lISO, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("English text without C1 bytes got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+
+    if (strcmp(name, "ISO-8859-1") != 0) {
+        log_err("English text without C1 bytes does not detect as ISO-8859-1, but as %s\n", name);
+    }
+
+bail:
+    freeBytes(bWindows);
+    freeBytes(bISO);
+
+    ucsdet_close(csd);
+#endif
+}
+
+static void TestInputFilter(void)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    static const char ss[] = "<a> <lot> <of> <English> <inside> <the> <markup> Un tr\\u00E8s petit peu de Fran\\u00E7ais. <to> <confuse> <the> <detector>";
+    int32_t sLength = 0;
+    UChar s[sizeof(ss)];
+    int32_t byteLength = 0;
+    char *bytes;
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *lang, *name;
+
+    sLength = u_unescape(ss, s, sizeof(ss));
+    bytes = extractBytes(s, sLength, "ISO-8859-1", &byteLength);
+
+    ucsdet_enableInputFilter(csd, TRUE);
+
+    if (!ucsdet_isInputFilterEnabled(csd)) {
+        log_err("ucsdet_enableInputFilter(csd, TRUE) did not enable input filter!\n");
+    }
+
+
+    ucsdet_setText(csd, bytes, byteLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Turning on the input filter resulted in no matches.\n");
+        goto turn_off;
+    }
+
+    name = ucsdet_getName(match, &status);
+
+    if (name == NULL || strcmp(name, "ISO-8859-1") != 0) {
+        log_err("Turning on the input filter resulted in %s rather than ISO-8859-1\n", name);
+    } else {
+        lang = ucsdet_getLanguage(match, &status);
+
+        if (lang == NULL || strcmp(lang, "fr") != 0) {
+            log_err("Input filter did not strip markup!\n");
+        }
+    }
+
+turn_off:
+    ucsdet_enableInputFilter(csd, FALSE);
+    ucsdet_setText(csd, bytes, byteLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Turning off the input filter resulted in no matches.\n");
+        goto bail;
+    }
+
+    name = ucsdet_getName(match, &status);
+
+    if (name == NULL || strcmp(name, "ISO-8859-1") != 0) {
+        log_err("Turning off the input filter resulted in %s rather than ISO-8859-1\n", name);
+    } else {
+        lang = ucsdet_getLanguage(match, &status);
+
+        if (lang == NULL || strcmp(lang, "en") != 0) {
+            log_err("Unfiltered input did not detect as English!\n");
+        }
+    }
+
+bail:
+    freeBytes(bytes);
+    ucsdet_close(csd);
+}
+
+static void TestChaining(void) {
+    UErrorCode status = U_USELESS_COLLATOR_ERROR;
+
+    ucsdet_open(&status);
+    ucsdet_setText(NULL, NULL, 0, &status);
+    ucsdet_getName(NULL, &status);
+    ucsdet_getConfidence(NULL, &status);
+    ucsdet_getLanguage(NULL, &status);
+    ucsdet_detect(NULL, &status);
+    ucsdet_setDeclaredEncoding(NULL, NULL, 0, &status);
+    ucsdet_detectAll(NULL, NULL, &status);
+    ucsdet_getUChars(NULL, NULL, 0, &status);
+    ucsdet_getUChars(NULL, NULL, 0, &status);
+    ucsdet_close(NULL);
+
+    /* All of this code should have done nothing. */
+    if (status != U_USELESS_COLLATOR_ERROR) {
+        log_err("Status got changed to %s\n", u_errorName(status));
+    }
+}
+
+static void TestBufferOverflow(void) {
+    UErrorCode status = U_ZERO_ERROR;
+    static const char *testStrings[] = {
+        "\x80\x20\x54\x68\x69\x73\x20\x69\x73\x20\x45\x6E\x67\x6C\x69\x73\x68\x20\x1b", /* A partial ISO-2022 shift state at the end */
+        "\x80\x20\x54\x68\x69\x73\x20\x69\x73\x20\x45\x6E\x67\x6C\x69\x73\x68\x20\x1b\x24", /* A partial ISO-2022 shift state at the end */
+        "\x80\x20\x54\x68\x69\x73\x20\x69\x73\x20\x45\x6E\x67\x6C\x69\x73\x68\x20\x1b\x24\x28", /* A partial ISO-2022 shift state at the end */
+        "\x80\x20\x54\x68\x69\x73\x20\x69\x73\x20\x45\x6E\x67\x6C\x69\x73\x68\x20\x1b\x24\x28\x44", /* A complete ISO-2022 shift state at the end with a bad one at the start */
+        "\x1b\x24\x28\x44", /* A complete ISO-2022 shift state at the end */
+        "\xa1", /* Could be a single byte shift-jis at the end */
+        "\x74\x68\xa1", /* Could be a single byte shift-jis at the end */
+        "\x74\x68\x65\xa1" /* Could be a single byte shift-jis at the end, but now we have English creeping in. */
+    };
+    static const char *testResults[] = {
+        "windows-1252",
+        "windows-1252",
+        "windows-1252",
+        "windows-1252",
+        "ISO-2022-JP",
+        NULL,
+        NULL,
+        "ISO-8859-1"
+    };
+    int32_t idx = 0;
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+
+    ucsdet_setDeclaredEncoding(csd, "ISO-2022-JP", -1, &status);
+
+    if (U_FAILURE(status)) {
+        log_err("Couldn't open detector. %s\n", u_errorName(status));
+        goto bail;
+    }
+
+    for (idx = 0; idx < ARRAY_SIZE(testStrings); idx++) {
+        ucsdet_setText(csd, testStrings[idx], -1, &status);
+        match = ucsdet_detect(csd, &status);
+
+        if (match == NULL) {
+            if (testResults[idx] != NULL) {
+                log_err("Unexpectedly got no results at index %d.\n", idx);
+            }
+            else {
+                log_verbose("Got no result as expected at index %d.\n", idx);
+            }
+            continue;
+        }
+
+        if (testResults[idx] == NULL || strcmp(ucsdet_getName(match, &status), testResults[idx]) != 0) {
+            log_err("Unexpectedly got %s instead of %s at index %d with confidence %d.\n",
+                ucsdet_getName(match, &status), testResults[idx], idx, ucsdet_getConfidence(match, &status));
+            goto bail;
+        }
+    }
+
+bail:
+    ucsdet_close(csd);
+}
+
+static void TestIBM424(void)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    
+    static const UChar chars[] = {
+            0x05D4, 0x05E4, 0x05E8, 0x05E7, 0x05DC, 0x05D9, 0x05D8, 0x0020, 0x05D4, 0x05E6, 0x05D1, 0x05D0, 0x05D9, 0x0020, 0x05D4, 0x05E8,
+            0x05D0, 0x05E9, 0x05D9, 0x002C, 0x0020, 0x05EA, 0x05EA, 0x0020, 0x05D0, 0x05DC, 0x05D5, 0x05E3, 0x0020, 0x05D0, 0x05D1, 0x05D9,
+            0x05D7, 0x05D9, 0x0020, 0x05DE, 0x05E0, 0x05D3, 0x05DC, 0x05D1, 0x05DC, 0x05D9, 0x05D8, 0x002C, 0x0020, 0x05D4, 0x05D5, 0x05E8,
+            0x05D4, 0x0020, 0x05E2, 0x05DC, 0x0020, 0x05E4, 0x05EA, 0x05D9, 0x05D7, 0x05EA, 0x0020, 0x05D7, 0x05E7, 0x05D9, 0x05E8, 0x05EA,
+            0x0020, 0x05DE, 0x05E6, 0x0022, 0x05D7, 0x0020, 0x05D1, 0x05E2, 0x05E7, 0x05D1, 0x05D5, 0x05EA, 0x0020, 0x05E2, 0x05D3, 0x05D5,
+            0x05D9, 0x05D5, 0x05EA, 0x0020, 0x05D7, 0x05D9, 0x05D9, 0x05DC, 0x05D9, 0x0020, 0x05E6, 0x05D4, 0x0022, 0x05DC, 0x0020, 0x05DE,
+            0x05DE, 0x05D1, 0x05E6, 0x05E2, 0x0020, 0x05E2, 0x05D5, 0x05E4, 0x05E8, 0x05EA, 0x0020, 0x05D9, 0x05E6, 0x05D5, 0x05E7, 0x05D4,
+            0x0020, 0x05D1, 0x002B, 0x0020, 0x05E8, 0x05E6, 0x05D5, 0x05E2, 0x05EA, 0x0020, 0x05E2, 0x05D6, 0x05D4, 0x002E, 0x0020, 0x05DC,
+            0x05D3, 0x05D1, 0x05E8, 0x05D9, 0x0020, 0x05D4, 0x05E4, 0x05E6, 0x0022, 0x05E8, 0x002C, 0x0020, 0x05DE, 0x05D4, 0x05E2, 0x05D3,
+            0x05D5, 0x05D9, 0x05D5, 0x05EA, 0x0020, 0x05E2, 0x05D5, 0x05DC, 0x05D4, 0x0020, 0x05EA, 0x05DE, 0x05D5, 0x05E0, 0x05D4, 0x0020,
+            0x05E9, 0x05DC, 0x0020, 0x0022, 0x05D4, 0x05EA, 0x05E0, 0x05D4, 0x05D2, 0x05D5, 0x05EA, 0x0020, 0x05E4, 0x05E1, 0x05D5, 0x05DC,
+            0x05D4, 0x0020, 0x05DC, 0x05DB, 0x05D0, 0x05D5, 0x05E8, 0x05D4, 0x0020, 0x05E9, 0x05DC, 0x0020, 0x05D7, 0x05D9, 0x05D9, 0x05DC,
+            0x05D9, 0x05DD, 0x0020, 0x05D1, 0x05DE, 0x05D4, 0x05DC, 0x05DA, 0x0020, 0x05DE, 0x05D1, 0x05E6, 0x05E2, 0x0020, 0x05E2, 0x05D5,
+            0x05E4, 0x05E8, 0x05EA, 0x0020, 0x05D9, 0x05E6, 0x05D5, 0x05E7, 0x05D4, 0x0022, 0x002E, 0x0020, 0x05DE, 0x05E0, 0x05D3, 0x05DC,
+            0x05D1, 0x05DC, 0x05D9, 0x05D8, 0x0020, 0x05E7, 0x05D9, 0x05D1, 0x05DC, 0x0020, 0x05D0, 0x05EA, 0x0020, 0x05D4, 0x05D7, 0x05DC,
+            0x05D8, 0x05EA, 0x05D5, 0x0020, 0x05DC, 0x05D0, 0x05D7, 0x05E8, 0x0020, 0x05E9, 0x05E2, 0x05D9, 0x05D9, 0x05DF, 0x0020, 0x05D1,
+            0x05EA, 0x05DE, 0x05DC, 0x05D9, 0x05DC, 0x0020, 0x05D4, 0x05E2, 0x05D3, 0x05D5, 0x05D9, 0x05D5, 0x05EA, 0x0000
+    };
+    
+    static const UChar chars_reverse[] = {
+            0x05EA, 0x05D5, 0x05D9, 0x05D5, 0x05D3, 0x05E2, 0x05D4, 0x0020, 0x05DC, 0x05D9, 0x05DC, 0x05DE, 0x05EA,
+            0x05D1, 0x0020, 0x05DF, 0x05D9, 0x05D9, 0x05E2, 0x05E9, 0x0020, 0x05E8, 0x05D7, 0x05D0, 0x05DC, 0x0020, 0x05D5, 0x05EA, 0x05D8,
+            0x05DC, 0x05D7, 0x05D4, 0x0020, 0x05EA, 0x05D0, 0x0020, 0x05DC, 0x05D1, 0x05D9, 0x05E7, 0x0020, 0x05D8, 0x05D9, 0x05DC, 0x05D1,
+            0x05DC, 0x05D3, 0x05E0, 0x05DE, 0x0020, 0x002E, 0x0022, 0x05D4, 0x05E7, 0x05D5, 0x05E6, 0x05D9, 0x0020, 0x05EA, 0x05E8, 0x05E4,
+            0x05D5, 0x05E2, 0x0020, 0x05E2, 0x05E6, 0x05D1, 0x05DE, 0x0020, 0x05DA, 0x05DC, 0x05D4, 0x05DE, 0x05D1, 0x0020, 0x05DD, 0x05D9,
+            0x05DC, 0x05D9, 0x05D9, 0x05D7, 0x0020, 0x05DC, 0x05E9, 0x0020, 0x05D4, 0x05E8, 0x05D5, 0x05D0, 0x05DB, 0x05DC, 0x0020, 0x05D4,
+            0x05DC, 0x05D5, 0x05E1, 0x05E4, 0x0020, 0x05EA, 0x05D5, 0x05D2, 0x05D4, 0x05E0, 0x05EA, 0x05D4, 0x0022, 0x0020, 0x05DC, 0x05E9,
+            0x0020, 0x05D4, 0x05E0, 0x05D5, 0x05DE, 0x05EA, 0x0020, 0x05D4, 0x05DC, 0x05D5, 0x05E2, 0x0020, 0x05EA, 0x05D5, 0x05D9, 0x05D5,
+            0x05D3, 0x05E2, 0x05D4, 0x05DE, 0x0020, 0x002C, 0x05E8, 0x0022, 0x05E6, 0x05E4, 0x05D4, 0x0020, 0x05D9, 0x05E8, 0x05D1, 0x05D3,
+            0x05DC, 0x0020, 0x002E, 0x05D4, 0x05D6, 0x05E2, 0x0020, 0x05EA, 0x05E2, 0x05D5, 0x05E6, 0x05E8, 0x0020, 0x002B, 0x05D1, 0x0020,
+            0x05D4, 0x05E7, 0x05D5, 0x05E6, 0x05D9, 0x0020, 0x05EA, 0x05E8, 0x05E4, 0x05D5, 0x05E2, 0x0020, 0x05E2, 0x05E6, 0x05D1, 0x05DE,
+            0x05DE, 0x0020, 0x05DC, 0x0022, 0x05D4, 0x05E6, 0x0020, 0x05D9, 0x05DC, 0x05D9, 0x05D9, 0x05D7, 0x0020, 0x05EA, 0x05D5, 0x05D9,
+            0x05D5, 0x05D3, 0x05E2, 0x0020, 0x05EA, 0x05D5, 0x05D1, 0x05E7, 0x05E2, 0x05D1, 0x0020, 0x05D7, 0x0022, 0x05E6, 0x05DE, 0x0020,
+            0x05EA, 0x05E8, 0x05D9, 0x05E7, 0x05D7, 0x0020, 0x05EA, 0x05D7, 0x05D9, 0x05EA, 0x05E4, 0x0020, 0x05DC, 0x05E2, 0x0020, 0x05D4,
+            0x05E8, 0x05D5, 0x05D4, 0x0020, 0x002C, 0x05D8, 0x05D9, 0x05DC, 0x05D1, 0x05DC, 0x05D3, 0x05E0, 0x05DE, 0x0020, 0x05D9, 0x05D7,
+            0x05D9, 0x05D1, 0x05D0, 0x0020, 0x05E3, 0x05D5, 0x05DC, 0x05D0, 0x0020, 0x05EA, 0x05EA, 0x0020, 0x002C, 0x05D9, 0x05E9, 0x05D0,
+            0x05E8, 0x05D4, 0x0020, 0x05D9, 0x05D0, 0x05D1, 0x05E6, 0x05D4, 0x0020, 0x05D8, 0x05D9, 0x05DC, 0x05E7, 0x05E8, 0x05E4, 0x05D4,
+            0x0000
+    };
+
+    int32_t bLength = 0, brLength = 0, cLength = ARRAY_SIZE(chars), crLength = ARRAY_SIZE(chars_reverse);
+    
+    char *bytes = extractBytes(chars, cLength, "IBM424", &bLength);
+    char *bytes_r = extractBytes(chars_reverse, crLength, "IBM424", &brLength);
+    
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *name;
+
+    ucsdet_setText(csd, bytes, bLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Encoding detection failure for IBM424_rtl: got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM424_rtl") != 0) {
+        log_data_err("Encoding detection failure for IBM424_rtl: got %s. (Are you missing data?)\n", name);
+    }
+    
+    ucsdet_setText(csd, bytes_r, brLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Encoding detection failure for IBM424_ltr: got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM424_ltr") != 0) {
+        log_data_err("Encoding detection failure for IBM424_ltr: got %s. (Are you missing data?)\n", name);
+    }
+
+bail:
+    freeBytes(bytes);
+    freeBytes(bytes_r);
+    ucsdet_close(csd);
+}
+
+static void TestIBM420(void)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    
+    static const UChar chars[] = {
+        0x0648, 0x064F, 0x0636, 0x0639, 0x062A, 0x0020, 0x0648, 0x0646, 0x064F, 0x0641, 0x0630, 0x062A, 0x0020, 0x0628, 0x0631, 0x0627,
+        0x0645, 0x062C, 0x0020, 0x062A, 0x0623, 0x0645, 0x064A, 0x0646, 0x0020, 0x0639, 0x062F, 0x064A, 0x062F, 0x0629, 0x0020, 0x0641,
+        0x064A, 0x0020, 0x0645, 0x0624, 0x0633, 0x0633, 0x0629, 0x0020, 0x0627, 0x0644, 0x062A, 0x0623, 0x0645, 0x064A, 0x0646, 0x0020,
+        0x0627, 0x0644, 0x0648, 0x0637, 0x0646, 0x064A, 0x002C, 0x0020, 0x0645, 0x0639, 0x0020, 0x0645, 0x0644, 0x0627, 0x0626, 0x0645,
+        0x062A, 0x0647, 0x0627, 0x0020, 0x062F, 0x0627, 0x0626, 0x0645, 0x0627, 0x064B, 0x0020, 0x0644, 0x0644, 0x0627, 0x062D, 0x062A,
+        0x064A, 0x0627, 0x062C, 0x0627, 0x062A, 0x0020, 0x0627, 0x0644, 0x0645, 0x062A, 0x063A, 0x064A, 0x0631, 0x0629, 0x0020, 0x0644,
+        0x0644, 0x0645, 0x062C, 0x062A, 0x0645, 0x0639, 0x0020, 0x0648, 0x0644, 0x0644, 0x062F, 0x0648, 0x0644, 0x0629, 0x002E, 0x0020,
+        0x062A, 0x0648, 0x0633, 0x0639, 0x062A, 0x0020, 0x0648, 0x062A, 0x0637, 0x0648, 0x0631, 0x062A, 0x0020, 0x0627, 0x0644, 0x0645,
+        0x0624, 0x0633, 0x0633, 0x0629, 0x0020, 0x0628, 0x0647, 0x062F, 0x0641, 0x0020, 0x0636, 0x0645, 0x0627, 0x0646, 0x0020, 0x0634,
+        0x0628, 0x0643, 0x0629, 0x0020, 0x0623, 0x0645, 0x0627, 0x0646, 0x0020, 0x0644, 0x0633, 0x0643, 0x0627, 0x0646, 0x0020, 0x062F,
+        0x0648, 0x0644, 0x0629, 0x0020, 0x0627, 0x0633, 0x0631, 0x0627, 0x0626, 0x064A, 0x0644, 0x0020, 0x0628, 0x0648, 0x062C, 0x0647,
+        0x0020, 0x0627, 0x0644, 0x0645, 0x062E, 0x0627, 0x0637, 0x0631, 0x0020, 0x0627, 0x0644, 0x0627, 0x0642, 0x062A, 0x0635, 0x0627,
+        0x062F, 0x064A, 0x0629, 0x0020, 0x0648, 0x0627, 0x0644, 0x0627, 0x062C, 0x062A, 0x0645, 0x0627, 0x0639, 0x064A, 0x0629, 0x002E,
+        0x0000
+    };
+    static const UChar chars_reverse[] = {
+        0x002E, 0x0629, 0x064A, 0x0639, 0x0627, 0x0645, 0x062A, 0x062C, 0x0627, 0x0644, 0x0627, 0x0648, 0x0020, 0x0629, 0x064A, 0x062F,
+        0x0627, 0x0635, 0x062A, 0x0642, 0x0627, 0x0644, 0x0627, 0x0020, 0x0631, 0x0637, 0x0627, 0x062E, 0x0645, 0x0644, 0x0627, 0x0020,
+        0x0647, 0x062C, 0x0648, 0x0628, 0x0020, 0x0644, 0x064A, 0x0626, 0x0627, 0x0631, 0x0633, 0x0627, 0x0020, 0x0629, 0x0644, 0x0648,
+        0x062F, 0x0020, 0x0646, 0x0627, 0x0643, 0x0633, 0x0644, 0x0020, 0x0646, 0x0627, 0x0645, 0x0623, 0x0020, 0x0629, 0x0643, 0x0628,
+        0x0634, 0x0020, 0x0646, 0x0627, 0x0645, 0x0636, 0x0020, 0x0641, 0x062F, 0x0647, 0x0628, 0x0020, 0x0629, 0x0633, 0x0633, 0x0624,
+        0x0645, 0x0644, 0x0627, 0x0020, 0x062A, 0x0631, 0x0648, 0x0637, 0x062A, 0x0648, 0x0020, 0x062A, 0x0639, 0x0633, 0x0648, 0x062A,
+        0x0020, 0x002E, 0x0629, 0x0644, 0x0648, 0x062F, 0x0644, 0x0644, 0x0648, 0x0020, 0x0639, 0x0645, 0x062A, 0x062C, 0x0645, 0x0644,
+        0x0644, 0x0020, 0x0629, 0x0631, 0x064A, 0x063A, 0x062A, 0x0645, 0x0644, 0x0627, 0x0020, 0x062A, 0x0627, 0x062C, 0x0627, 0x064A,
+        0x062A, 0x062D, 0x0627, 0x0644, 0x0644, 0x0020, 0x064B, 0x0627, 0x0645, 0x0626, 0x0627, 0x062F, 0x0020, 0x0627, 0x0647, 0x062A,
+        0x0645, 0x0626, 0x0627, 0x0644, 0x0645, 0x0020, 0x0639, 0x0645, 0x0020, 0x002C, 0x064A, 0x0646, 0x0637, 0x0648, 0x0644, 0x0627,
+        0x0020, 0x0646, 0x064A, 0x0645, 0x0623, 0x062A, 0x0644, 0x0627, 0x0020, 0x0629, 0x0633, 0x0633, 0x0624, 0x0645, 0x0020, 0x064A,
+        0x0641, 0x0020, 0x0629, 0x062F, 0x064A, 0x062F, 0x0639, 0x0020, 0x0646, 0x064A, 0x0645, 0x0623, 0x062A, 0x0020, 0x062C, 0x0645,
+        0x0627, 0x0631, 0x0628, 0x0020, 0x062A, 0x0630, 0x0641, 0x064F, 0x0646, 0x0648, 0x0020, 0x062A, 0x0639, 0x0636, 0x064F, 0x0648,
+        0x0000,
+    };
+    
+    int32_t bLength = 0, brLength = 0, cLength = ARRAY_SIZE(chars), crLength = ARRAY_SIZE(chars_reverse);
+    
+    char *bytes = extractBytes(chars, cLength, "IBM420", &bLength);
+    char *bytes_r = extractBytes(chars_reverse, crLength, "IBM420", &brLength);
+    
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *name;
+
+    ucsdet_setText(csd, bytes, bLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Encoding detection failure for IBM420_rtl: got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM420_rtl") != 0) {
+        log_data_err("Encoding detection failure for IBM420_rtl: got %s. (Are you missing data?)\n", name);
+    }
+    
+    ucsdet_setText(csd, bytes_r, brLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        log_err("Encoding detection failure for IBM420_ltr: got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM420_ltr") != 0) {
+        log_data_err("Encoding detection failure for IBM420_ltr: got %s. (Are you missing data?)\n", name);
+    }
+
+bail:
+    freeBytes(bytes);
+    freeBytes(bytes_r);
+    ucsdet_close(csd);
+}