--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/lxml/includes/libxml/encoding.h	Sat May 02 07:14:21 2020 -0400
@@ -0,0 +1,245 @@
+/*
+ * Summary: interface for the encoding conversion functions
+ * Description: interface for the encoding conversion functions needed for
+ *              XML basic encoding and iconv() support.
+ *
+ * Related specs are
+ * rfc2044        (UTF-8 and UTF-16) F. Yergeau Alis Technologies
+ * [ISO-10646]    UTF-8 and UTF-16 in Annexes
+ * [ISO-8859-1]   ISO Latin-1 characters codes.
+ * [UNICODE]      The Unicode Consortium, "The Unicode Standard --
+ *                Worldwide Character Encoding -- Version 1.0", Addison-
+ *                Wesley, Volume 1, 1991, Volume 2, 1992.  UTF-8 is
+ *                described in Unicode Technical Report #4.
+ * [US-ASCII]     Coded Character Set--7-bit American Standard Code for
+ *                Information Interchange, ANSI X3.4-1986.
+ *
+ * Copy: See Copyright for the status of this software.
+ *
+ * Author: Daniel Veillard
+ */
+
+#ifndef __XML_CHAR_ENCODING_H__
+#define __XML_CHAR_ENCODING_H__
+
+#include <libxml/xmlversion.h>
+
+#ifdef LIBXML_ICONV_ENABLED
+#include <iconv.h>
+#endif
+#ifdef LIBXML_ICU_ENABLED
+#include <unicode/ucnv.h>
+#endif
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * xmlCharEncoding:
+ *
+ * Predefined values for some standard encodings.
+ * Libxml does not do beforehand translation on UTF8 and ISOLatinX.
+ * It also supports ASCII, ISO-8859-1, and UTF16 (LE and BE) by default.
+ *
+ * Anything else would have to be translated to UTF8 before being
+ * given to the parser itself. The BOM for UTF16 and the encoding
+ * declaration are looked at and a converter is looked for at that
+ * point. If not found the parser stops here as asked by the XML REC. A
+ * converter can be registered by the user using xmlRegisterCharEncodingHandler
+ * but the current form doesn't allow stateful transcoding (a serious
+ * problem agreed !). If iconv has been found it will be used
+ * automatically and allow stateful transcoding, the simplest is then
+ * to be sure to enable iconv and to provide iconv libs for the encoding
+ * support needed.
+ *
+ * Note that the generic "UTF-16" is not a predefined value.  Instead, only
+ * the specific UTF-16LE and UTF-16BE are present.
+ */
+typedef enum {
+    XML_CHAR_ENCODING_ERROR=   -1, /* No char encoding detected */
+    XML_CHAR_ENCODING_NONE=	0, /* No char encoding detected */
+    XML_CHAR_ENCODING_UTF8=	1, /* UTF-8 */
+    XML_CHAR_ENCODING_UTF16LE=	2, /* UTF-16 little endian */
+    XML_CHAR_ENCODING_UTF16BE=	3, /* UTF-16 big endian */
+    XML_CHAR_ENCODING_UCS4LE=	4, /* UCS-4 little endian */
+    XML_CHAR_ENCODING_UCS4BE=	5, /* UCS-4 big endian */
+    XML_CHAR_ENCODING_EBCDIC=	6, /* EBCDIC uh! */
+    XML_CHAR_ENCODING_UCS4_2143=7, /* UCS-4 unusual ordering */
+    XML_CHAR_ENCODING_UCS4_3412=8, /* UCS-4 unusual ordering */
+    XML_CHAR_ENCODING_UCS2=	9, /* UCS-2 */
+    XML_CHAR_ENCODING_8859_1=	10,/* ISO-8859-1 ISO Latin 1 */
+    XML_CHAR_ENCODING_8859_2=	11,/* ISO-8859-2 ISO Latin 2 */
+    XML_CHAR_ENCODING_8859_3=	12,/* ISO-8859-3 */
+    XML_CHAR_ENCODING_8859_4=	13,/* ISO-8859-4 */
+    XML_CHAR_ENCODING_8859_5=	14,/* ISO-8859-5 */
+    XML_CHAR_ENCODING_8859_6=	15,/* ISO-8859-6 */
+    XML_CHAR_ENCODING_8859_7=	16,/* ISO-8859-7 */
+    XML_CHAR_ENCODING_8859_8=	17,/* ISO-8859-8 */
+    XML_CHAR_ENCODING_8859_9=	18,/* ISO-8859-9 */
+    XML_CHAR_ENCODING_2022_JP=  19,/* ISO-2022-JP */
+    XML_CHAR_ENCODING_SHIFT_JIS=20,/* Shift_JIS */
+    XML_CHAR_ENCODING_EUC_JP=   21,/* EUC-JP */
+    XML_CHAR_ENCODING_ASCII=    22 /* pure ASCII */
+} xmlCharEncoding;
+
+/**
+ * xmlCharEncodingInputFunc:
+ * @out:  a pointer to an array of bytes to store the UTF-8 result
+ * @outlen:  the length of @out
+ * @in:  a pointer to an array of chars in the original encoding
+ * @inlen:  the length of @in
+ *
+ * Take a block of chars in the original encoding and try to convert
+ * it to an UTF-8 block of chars out.
+ *
+ * Returns the number of bytes written, -1 if lack of space, or -2
+ *     if the transcoding failed.
+ * The value of @inlen after return is the number of octets consumed
+ *     if the return value is positive, else unpredictiable.
+ * The value of @outlen after return is the number of octets consumed.
+ */
+typedef int (* xmlCharEncodingInputFunc)(unsigned char *out, int *outlen,
+                                         const unsigned char *in, int *inlen);
+
+
+/**
+ * xmlCharEncodingOutputFunc:
+ * @out:  a pointer to an array of bytes to store the result
+ * @outlen:  the length of @out
+ * @in:  a pointer to an array of UTF-8 chars
+ * @inlen:  the length of @in
+ *
+ * Take a block of UTF-8 chars in and try to convert it to another
+ * encoding.
+ * Note: a first call designed to produce heading info is called with
+ * in = NULL. If stateful this should also initialize the encoder state.
+ *
+ * Returns the number of bytes written, -1 if lack of space, or -2
+ *     if the transcoding failed.
+ * The value of @inlen after return is the number of octets consumed
+ *     if the return value is positive, else unpredictiable.
+ * The value of @outlen after return is the number of octets produced.
+ */
+typedef int (* xmlCharEncodingOutputFunc)(unsigned char *out, int *outlen,
+                                          const unsigned char *in, int *inlen);
+
+
+/*
+ * Block defining the handlers for non UTF-8 encodings.
+ * If iconv is supported, there are two extra fields.
+ */
+#ifdef LIBXML_ICU_ENABLED
+/* Size of pivot buffer, same as icu/source/common/ucnv.cpp CHUNK_SIZE */
+#define ICU_PIVOT_BUF_SIZE 1024
+struct _uconv_t {
+  UConverter *uconv; /* for conversion between an encoding and UTF-16 */
+  UConverter *utf8; /* for conversion between UTF-8 and UTF-16 */
+  UChar      pivot_buf[ICU_PIVOT_BUF_SIZE];
+  UChar      *pivot_source;
+  UChar      *pivot_target;
+};
+typedef struct _uconv_t uconv_t;
+#endif
+
+typedef struct _xmlCharEncodingHandler xmlCharEncodingHandler;
+typedef xmlCharEncodingHandler *xmlCharEncodingHandlerPtr;
+struct _xmlCharEncodingHandler {
+    char                       *name;
+    xmlCharEncodingInputFunc   input;
+    xmlCharEncodingOutputFunc  output;
+#ifdef LIBXML_ICONV_ENABLED
+    iconv_t                    iconv_in;
+    iconv_t                    iconv_out;
+#endif /* LIBXML_ICONV_ENABLED */
+#ifdef LIBXML_ICU_ENABLED
+    uconv_t                    *uconv_in;
+    uconv_t                    *uconv_out;
+#endif /* LIBXML_ICU_ENABLED */
+};
+
+#ifdef __cplusplus
+}
+#endif
+#include <libxml/tree.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Interfaces for encoding handlers.
+ */
+XMLPUBFUN void XMLCALL
+	xmlInitCharEncodingHandlers	(void);
+XMLPUBFUN void XMLCALL
+	xmlCleanupCharEncodingHandlers	(void);
+XMLPUBFUN void XMLCALL
+	xmlRegisterCharEncodingHandler	(xmlCharEncodingHandlerPtr handler);
+XMLPUBFUN xmlCharEncodingHandlerPtr XMLCALL
+	xmlGetCharEncodingHandler	(xmlCharEncoding enc);
+XMLPUBFUN xmlCharEncodingHandlerPtr XMLCALL
+	xmlFindCharEncodingHandler	(const char *name);
+XMLPUBFUN xmlCharEncodingHandlerPtr XMLCALL
+	xmlNewCharEncodingHandler	(const char *name,
+					 xmlCharEncodingInputFunc input,
+					 xmlCharEncodingOutputFunc output);
+
+/*
+ * Interfaces for encoding names and aliases.
+ */
+XMLPUBFUN int XMLCALL
+	xmlAddEncodingAlias		(const char *name,
+					 const char *alias);
+XMLPUBFUN int XMLCALL
+	xmlDelEncodingAlias		(const char *alias);
+XMLPUBFUN const char * XMLCALL
+	xmlGetEncodingAlias		(const char *alias);
+XMLPUBFUN void XMLCALL
+	xmlCleanupEncodingAliases	(void);
+XMLPUBFUN xmlCharEncoding XMLCALL
+	xmlParseCharEncoding		(const char *name);
+XMLPUBFUN const char * XMLCALL
+	xmlGetCharEncodingName		(xmlCharEncoding enc);
+
+/*
+ * Interfaces directly used by the parsers.
+ */
+XMLPUBFUN xmlCharEncoding XMLCALL
+	xmlDetectCharEncoding		(const unsigned char *in,
+					 int len);
+
+XMLPUBFUN int XMLCALL
+	xmlCharEncOutFunc		(xmlCharEncodingHandler *handler,
+					 xmlBufferPtr out,
+					 xmlBufferPtr in);
+
+XMLPUBFUN int XMLCALL
+	xmlCharEncInFunc		(xmlCharEncodingHandler *handler,
+					 xmlBufferPtr out,
+					 xmlBufferPtr in);
+XMLPUBFUN int XMLCALL
+	xmlCharEncFirstLine		(xmlCharEncodingHandler *handler,
+					 xmlBufferPtr out,
+					 xmlBufferPtr in);
+XMLPUBFUN int XMLCALL
+	xmlCharEncCloseFunc		(xmlCharEncodingHandler *handler);
+
+/*
+ * Export a few useful functions
+ */
+#ifdef LIBXML_OUTPUT_ENABLED
+XMLPUBFUN int XMLCALL
+	UTF8Toisolat1			(unsigned char *out,
+					 int *outlen,
+					 const unsigned char *in,
+					 int *inlen);
+#endif /* LIBXML_OUTPUT_ENABLED */
+XMLPUBFUN int XMLCALL
+	isolat1ToUTF8			(unsigned char *out,
+					 int *outlen,
+					 const unsigned char *in,
+					 int *inlen);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __XML_CHAR_ENCODING_H__ */