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save: Fix xmlSave with NULL encoding

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Regressed with cc45f618.
This commit is contained in:
Nick Wellnhofer
2025-04-20 19:25:04 +02:00
parent b85d77d156
commit 936e3d529a
2 changed files with 71 additions and 22 deletions
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45
testparser.c
View File

@@ -288,6 +288,50 @@ testNoBlanks(void) {
return err;
}
static int
testSaveNullEncDoc(const char *xml, const char *expect) {
xmlDocPtr doc;
xmlBufferPtr buffer;
xmlSaveCtxtPtr save;
const xmlChar *result;
int err = 0;
doc = xmlReadDoc(BAD_CAST xml, NULL, NULL, 0);
buffer = xmlBufferCreate();
save = xmlSaveToBuffer(buffer, NULL, 0);
xmlSaveDoc(save, doc);
xmlSaveClose(save);
result = xmlBufferContent(buffer);
if (strcmp((char *) result, expect) != 0) {
fprintf(stderr, "xmlSave with NULL encodíng failed\n");
err = 1;
}
xmlBufferFree(buffer);
xmlFreeDoc(doc);
return err;
}
static int
testSaveNullEnc(void) {
int err = 0;
err |= testSaveNullEncDoc(
"<?xml version=\"1.0\"?><doc>\xC3\x98</doc>",
"<?xml version=\"1.0\"?>\n<doc>&#xD8;</doc>\n");
err |= testSaveNullEncDoc(
"<?xml version=\"1.0\" encoding=\"utf-8\"?><doc>\xC3\x98</doc>",
"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<doc>\xC3\x98</doc>\n");
err |= testSaveNullEncDoc(
"<?xml version=\"1.0\" encoding=\"iso-8859-1\"?><doc>\xD8</doc>",
"<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\n<doc>\xD8</doc>\n");
return err;
}
#endif /* LIBXML_OUTPUT_ENABLED */
#ifdef LIBXML_SAX1_ENABLED
@@ -1157,6 +1201,7 @@ main(void) {
#ifdef LIBXML_OUTPUT_ENABLED
err |= testCtxtParseContent();
err |= testNoBlanks();
err |= testSaveNullEnc();
#endif
#ifdef LIBXML_SAX1_ENABLED
err |= testBalancedChunk();

20
xmlsave.c
View File

@@ -778,6 +778,8 @@ static int xmlSaveSwitchEncoding(xmlSaveCtxtPtr ctxt, const char *encoding) {
xmlSaveErr(buf, res, NULL, encoding);
return(-1);
}
if (handler != NULL) {
buf->conv = xmlBufCreate(4000 /* MINLEN */);
if (buf->conv == NULL) {
xmlCharEncCloseFunc(handler);
@@ -785,6 +787,10 @@ static int xmlSaveSwitchEncoding(xmlSaveCtxtPtr ctxt, const char *encoding) {
return(-1);
}
buf->encoder = handler;
}
ctxt->encoding = (const xmlChar *) encoding;
/*
* initialize the state, e.g. if outputting a BOM
*/
@@ -795,11 +801,15 @@ static int xmlSaveSwitchEncoding(xmlSaveCtxtPtr ctxt, const char *encoding) {
static int xmlSaveClearEncoding(xmlSaveCtxtPtr ctxt) {
xmlOutputBufferPtr buf = ctxt->buf;
xmlOutputBufferFlush(buf);
xmlCharEncCloseFunc(buf->encoder);
xmlBufFree(buf->conv);
buf->encoder = NULL;
buf->conv = NULL;
ctxt->encoding = NULL;
return(0);
}
@@ -1342,7 +1352,6 @@ xmlDocContentDumpOutput(xmlSaveCtxtPtr ctxt, xmlDocPtr cur) {
const xmlChar *oldctxtenc = ctxt->encoding;
const xmlChar *encoding = ctxt->encoding;
xmlOutputBufferPtr buf = ctxt->buf;
xmlCharEncoding enc;
int switched_encoding = 0;
xmlInitParser();
@@ -1370,6 +1379,7 @@ xmlDocContentDumpOutput(xmlSaveCtxtPtr ctxt, xmlDocPtr cur) {
if (xmlSaveSwitchEncoding(ctxt, (const char*) encoding) < 0) {
return(-1);
}
switched_encoding = 1;
}
if (ctxt->options & XML_SAVE_FORMAT)
htmlDocContentDumpFormatOutput(buf, cur,
@@ -1377,30 +1387,24 @@ xmlDocContentDumpOutput(xmlSaveCtxtPtr ctxt, xmlDocPtr cur) {
else
htmlDocContentDumpFormatOutput(buf, cur,
(const char *)encoding, 0);
return(0);
#else
return(-1);
#endif
} else if ((cur->type == XML_DOCUMENT_NODE) ||
(ctxt->options & XML_SAVE_AS_XML) ||
(ctxt->options & XML_SAVE_XHTML)) {
enc = xmlParseCharEncoding((const char*) encoding);
if ((encoding != NULL) && (oldctxtenc == NULL) &&
(buf->encoder == NULL) && (buf->conv == NULL) &&
((ctxt->options & XML_SAVE_NO_DECL) == 0)) {
if ((enc != XML_CHAR_ENCODING_UTF8) &&
(enc != XML_CHAR_ENCODING_NONE) &&
(enc != XML_CHAR_ENCODING_ASCII)) {
/*
* we need to switch to this encoding but just for this
* document since we output the XMLDecl the conversion
* must be done to not generate not well formed documents.
*/
if (xmlSaveSwitchEncoding(ctxt, (const char*) encoding) < 0)
if (xmlSaveSwitchEncoding(ctxt, (const char *) encoding) < 0)
return(-1);
switched_encoding = 1;
}
}
/*