examples: Clone example "examples" to "element_declarations"

3 files changed, 127 insertions, 2 deletions

diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 2b4c13c5..0194bb94 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -579,10 +579,11 @@ endif()
 # C code examples
 #
 if(EXPAT_BUILD_EXAMPLES)
+    add_executable(element_declarations examples/element_declarations.c)
     add_executable(elements examples/elements.c)
     add_executable(outline examples/outline.c)
 
-    foreach(_target elements outline)
+    foreach(_target element_declarations elements outline)
         set_property(TARGET ${_target} PROPERTY RUNTIME_OUTPUT_DIRECTORY examples)
         target_link_libraries(${_target} expat)
     endforeach()
diff --git a/expat/examples/Makefile.am b/expat/examples/Makefile.am
index d386b592..bb5fa91a 100644
--- a/expat/examples/Makefile.am
+++ b/expat/examples/Makefile.am
@@ -31,7 +31,10 @@
 
 AM_CPPFLAGS = @AM_CPPFLAGS@ -I$(srcdir)/../lib
 
-noinst_PROGRAMS = elements outline
+noinst_PROGRAMS = element_declarations elements outline
+
+element_declarations_SOURCES = element_declarations.c
+element_declarations_LDADD = ../lib/libexpat.la
 
 elements_SOURCES = elements.c
 elements_LDADD = ../lib/libexpat.la
diff --git a/expat/examples/element_declarations.c b/expat/examples/element_declarations.c
new file mode 100644
index 00000000..5098d7d9
--- /dev/null
+++ b/expat/examples/element_declarations.c
@@ -0,0 +1,121 @@
+/* This is simple demonstration of how to use expat. This program
+   reads an XML document from standard input and writes a line with
+   the name of each element to standard output indenting child
+   elements by one tab stop more than their parent element.
+   It must be used with Expat compiled for UTF-8 output.
+                            __  __            _
+                         ___\ \/ /_ __   __ _| |_
+                        / _ \\  /| '_ \ / _` | __|
+                       |  __//  \| |_) | (_| | |_
+                        \___/_/\_\ .__/ \__,_|\__|
+                                 |_| XML parser
+
+   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
+   Copyright (c) 2001-2003 Fred L. Drake, Jr. <fdrake@users.sourceforge.net>
+   Copyright (c) 2004-2006 Karl Waclawek <karl@waclawek.net>
+   Copyright (c) 2005-2007 Steven Solie <steven@solie.ca>
+   Copyright (c) 2016-2019 Sebastian Pipping <sebastian@pipping.org>
+   Copyright (c) 2017      Rhodri James <rhodri@wildebeest.org.uk>
+   Copyright (c) 2019      Zhongyuan Zhou <zhouzhongyuan@huawei.com>
+   Licensed under the MIT license:
+
+   Permission is  hereby granted,  free of charge,  to any  person obtaining
+   a  copy  of  this  software   and  associated  documentation  files  (the
+   "Software"),  to  deal in  the  Software  without restriction,  including
+   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+   distribute, sublicense, and/or sell copies of the Software, and to permit
+   persons  to whom  the Software  is  furnished to  do so,  subject to  the
+   following conditions:
+
+   The above copyright  notice and this permission notice  shall be included
+   in all copies or substantial portions of the Software.
+
+   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+   USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <stdio.h>
+#include <expat.h>
+
+#ifdef XML_LARGE_SIZE
+#  define XML_FMT_INT_MOD "ll"
+#else
+#  define XML_FMT_INT_MOD "l"
+#endif
+
+#ifdef XML_UNICODE_WCHAR_T
+#  define XML_FMT_STR "ls"
+#else
+#  define XML_FMT_STR "s"
+#endif
+
+static void XMLCALL
+startElement(void *userData, const XML_Char *name, const XML_Char **atts) {
+  int i;
+  int *const depthPtr = (int *)userData;
+  (void)atts;
+
+  for (i = 0; i < *depthPtr; i++)
+    putchar('\t');
+  printf("%" XML_FMT_STR "\n", name);
+  *depthPtr += 1;
+}
+
+static void XMLCALL
+endElement(void *userData, const XML_Char *name) {
+  int *const depthPtr = (int *)userData;
+  (void)name;
+
+  *depthPtr -= 1;
+}
+
+int
+main(void) {
+  XML_Parser parser = XML_ParserCreate(NULL);
+  int done;
+  int depth = 0;
+
+  if (! parser) {
+    fprintf(stderr, "Couldn't allocate memory for parser\n");
+    return 1;
+  }
+
+  XML_SetUserData(parser, &depth);
+  XML_SetElementHandler(parser, startElement, endElement);
+
+  do {
+    void *const buf = XML_GetBuffer(parser, BUFSIZ);
+    if (! buf) {
+      fprintf(stderr, "Couldn't allocate memory for buffer\n");
+      XML_ParserFree(parser);
+      return 1;
+    }
+
+    const size_t len = fread(buf, 1, BUFSIZ, stdin);
+
+    if (ferror(stdin)) {
+      fprintf(stderr, "Read error\n");
+      XML_ParserFree(parser);
+      return 1;
+    }
+
+    done = feof(stdin);
+
+    if (XML_ParseBuffer(parser, (int)len, done) == XML_STATUS_ERROR) {
+      fprintf(stderr,
+              "Parse error at line %" XML_FMT_INT_MOD "u:\n%" XML_FMT_STR "\n",
+              XML_GetCurrentLineNumber(parser),
+              XML_ErrorString(XML_GetErrorCode(parser)));
+      XML_ParserFree(parser);
+      return 1;
+    }
+  } while (! done);
+
+  XML_ParserFree(parser);
+  return 0;
+}