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/**************************************************************************
* © 2016 and later: Unicode, Inc. and others.
* License & terms of use: http://www.unicode.org/copyright.html#License
**************************************************************************
**************************************************************************
* COPYRIGHT:
* Copyright (c) 1999-2007, International Business Machines Corporation and
* others. All Rights Reserved.
**************************************************************************/
#include "unicode/utypes.h"
#include "unicode/ucnv.h"
#include "flagcb.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#define DEBUG_TMI 0 /* set to 1 for Too Much Information (TMI) */
U_CAPI FromUFLAGContext* U_EXPORT2 flagCB_fromU_openContext()
{
FromUFLAGContext *ctx;
ctx = (FromUFLAGContext*) malloc(sizeof(FromUFLAGContext));
ctx->subCallback = NULL;
ctx->subContext = NULL;
ctx->flag = FALSE;
return ctx;
}
U_CAPI void U_EXPORT2 flagCB_fromU(
const void *context,
UConverterFromUnicodeArgs *fromUArgs,
const UChar* codeUnits,
int32_t length,
UChar32 codePoint,
UConverterCallbackReason reason,
UErrorCode * err)
{
/* First step - based on the reason code, take action */
if(reason == UCNV_UNASSIGNED) { /* whatever set should be trapped here */
((FromUFLAGContext*)context)->flag = TRUE;
}
if(reason == UCNV_CLONE) {
/* The following is the recommended way to implement UCNV_CLONE
in a callback. */
UConverterFromUCallback saveCallback;
const void *saveContext;
FromUFLAGContext *old, *cloned;
UErrorCode subErr = U_ZERO_ERROR;
#if DEBUG_TMI
printf("*** FLAGCB: cloning %p ***\n", context);
#endif
old = (FromUFLAGContext*)context;
cloned = flagCB_fromU_openContext();
memcpy(cloned, old, sizeof(FromUFLAGContext));
#if DEBUG_TMI
printf("%p: my subcb=%p:%p\n", old, old->subCallback,
old->subContext);
printf("%p: cloned subcb=%p:%p\n", cloned, cloned->subCallback,
cloned->subContext);
#endif
/* We need to get the sub CB to handle cloning,
* so we have to set up the following, temporarily:
*
* - Set the callback+context to the sub of this (flag) cb
* - preserve the current cb+context, it could be anything
*
* Before:
* CNV -> FLAG -> subcb -> ...
*
* After:
* CNV -> subcb -> ...
*
* The chain from 'something' on is saved, and will be restored
* at the end of this block.
*
*/
ucnv_setFromUCallBack(fromUArgs->converter,
cloned->subCallback,
cloned->subContext,
&saveCallback,
&saveContext,
&subErr);
if( cloned->subCallback != NULL ) {
/* Now, call the sub callback if present */
cloned->subCallback(cloned->subContext, fromUArgs, codeUnits,
length, codePoint, reason, err);
}
ucnv_setFromUCallBack(fromUArgs->converter,
saveCallback, /* Us */
cloned, /* new context */
&cloned->subCallback, /* IMPORTANT! Accept any change in CB or context */
&cloned->subContext,
&subErr);
if(U_FAILURE(subErr)) {
*err = subErr;
}
}
/* process other reasons here if need be */
/* Always call the subCallback if present */
if(((FromUFLAGContext*)context)->subCallback != NULL &&
reason != UCNV_CLONE) {
((FromUFLAGContext*)context)->subCallback( ((FromUFLAGContext*)context)->subContext,
fromUArgs,
codeUnits,
length,
codePoint,
reason,
err);
}
/* cleanup - free the memory AFTER calling the sub CB */
if(reason == UCNV_CLOSE) {
free((void*)context);
}
}
/* Debugging callback, just outputs what happens */
/* Test safe clone callback */
static uint32_t debugCB_nextSerial()
{
static uint32_t n = 1;
return (n++);
}
static void debugCB_print_log(debugCBContext *q, const char *name)
{
if(q==NULL) {
printf("debugCBontext: %s is NULL!!\n", name);
} else {
if(q->magic != 0xC0FFEE) {
fprintf(stderr, "debugCBContext: %p:%d's magic is %x, supposed to be 0xC0FFEE\n",
q,q->serial, q->magic);
}
printf("debugCBContext %p:%d=%s - magic %x\n",
q, q->serial, name, q->magic);
}
}
static debugCBContext *debugCB_clone(debugCBContext *ctx)
{
debugCBContext *newCtx;
newCtx = malloc(sizeof(debugCBContext));
newCtx->serial = debugCB_nextSerial();
newCtx->magic = 0xC0FFEE;
newCtx->subCallback = ctx->subCallback;
newCtx->subContext = ctx->subContext;
#if DEBUG_TMI
printf("debugCB_clone: %p:%d -> new context %p:%d\n", ctx, ctx->serial, newCtx, newCtx->serial);
#endif
return newCtx;
}
void debugCB_fromU(const void *context,
UConverterFromUnicodeArgs *fromUArgs,
const UChar* codeUnits,
int32_t length,
UChar32 codePoint,
UConverterCallbackReason reason,
UErrorCode * err)
{
debugCBContext *ctx = (debugCBContext*)context;
/*UConverterFromUCallback junkFrom;*/
#if DEBUG_TMI
printf("debugCB_fromU: Context %p:%d called, reason %d on cnv %p [err=%s]\n", ctx, ctx->serial, reason, fromUArgs->converter, u_errorName(*err));
#endif
if(ctx->magic != 0xC0FFEE) {
fprintf(stderr, "debugCB_fromU: Context %p:%d magic is 0x%x should be 0xC0FFEE.\n", ctx,ctx->serial, ctx->magic);
return;
}
if(reason == UCNV_CLONE) {
/* see comments in above flagCB clone code */
UConverterFromUCallback saveCallback;
const void *saveContext;
debugCBContext *cloned;
UErrorCode subErr = U_ZERO_ERROR;
/* "recreate" it */
#if DEBUG_TMI
printf("debugCB_fromU: cloning..\n");
#endif
cloned = debugCB_clone(ctx);
if(cloned == NULL) {
fprintf(stderr, "debugCB_fromU: internal clone failed on %p\n", ctx);
*err = U_MEMORY_ALLOCATION_ERROR;
return;
}
ucnv_setFromUCallBack(fromUArgs->converter,
cloned->subCallback,
cloned->subContext,
&saveCallback,
&saveContext,
&subErr);
if( cloned->subCallback != NULL) {
#if DEBUG_TMI
printf("debugCB_fromU:%p calling subCB %p\n", ctx, cloned->subCallback);
#endif
/* call subCB if present */
cloned->subCallback(cloned->subContext, fromUArgs, codeUnits,
length, codePoint, reason, err);
} else {
printf("debugCB_fromU:%p, NOT calling subCB, it's NULL\n", ctx);
}
/* set back callback */
ucnv_setFromUCallBack(fromUArgs->converter,
saveCallback, /* Us */
cloned, /* new context */
&cloned->subCallback, /* IMPORTANT! Accept any change in CB or context */
&cloned->subContext,
&subErr);
if(U_FAILURE(subErr)) {
*err = subErr;
}
}
/* process other reasons here */
/* always call subcb if present */
if(ctx->subCallback != NULL && reason != UCNV_CLONE) {
ctx->subCallback(ctx->subContext,
fromUArgs,
codeUnits,
length,
codePoint,
reason,
err);
}
if(reason == UCNV_CLOSE) {
#if DEBUG_TMI
printf("debugCB_fromU: Context %p:%d closing\n", ctx, ctx->serial);
#endif
free(ctx);
}
#if DEBUG_TMI
printf("debugCB_fromU: leaving cnv %p, ctx %p: err %s\n", fromUArgs->converter, ctx, u_errorName(*err));
#endif
}
debugCBContext *debugCB_openContext()
{
debugCBContext *ctx;
ctx = malloc(sizeof(debugCBContext));
if(ctx != NULL) {
ctx->magic = 0xC0FFEE;
ctx->serial = debugCB_nextSerial();
ctx->subCallback = NULL;
ctx->subContext = NULL;
#if DEBUG_TMI
fprintf(stderr, "debugCB:openContext opened[%p] = serial #%d\n", ctx, ctx->serial);
#endif
}
return ctx;
}
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