Add doxygen support.

Makefile.am

@@ -2,3 +2,14 @@
 ## the "$SUBDIR" subdirectories.
 
 SUBDIRS = include src . tests
+
+EXTRA_DIST = doc/doxygen.cfg
+
+maintainer-clean-local:
+	-rm -f aclocal.m4 config.h.in configure config/*
+	-find ${builddir} -name Makefile.in -exec rm -f '{}' ';'
+
+.PHONY: bootstrap
+bootstrap: maintainer-clean
+	./bootstrap
+

configure.ac

@@ -55,6 +55,9 @@
 AC_PROG_MAKE_SET
 AC_PROG_LIBTOOL
 
+AC_CHECK_PROG(DOXYGEN, [doxygen], [true], [false])
+AM_CONDITIONAL(DOXYGEN, [test "$DOXYGEN" = true])
+
 # Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS([stdlib.h])

doc/doxygen.cfg

+# Doxyfile 1.4.4
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = $(PACKAGE)
+PROJECT_NUMBER         = $(VERSION)
+OUTPUT_DIRECTORY       = $(top_builddir)/doc/
+CREATE_SUBDIRS         = NO
+OUTPUT_LANGUAGE        = English
+USE_WINDOWS_ENCODING   = NO
+BRIEF_MEMBER_DESC      = YES
+REPEAT_BRIEF           = NO
+ABBREVIATE_BRIEF       = 
+ALWAYS_DETAILED_SEC    = NO
+INLINE_INHERITED_MEMB  = NO
+FULL_PATH_NAMES        = YES
+STRIP_FROM_PATH        = 
+STRIP_FROM_INC_PATH    = 
+SHORT_NAMES            = NO
+JAVADOC_AUTOBRIEF      = NO
+MULTILINE_CPP_IS_BRIEF = NO
+DETAILS_AT_TOP         = NO
+INHERIT_DOCS           = YES
+DISTRIBUTE_GROUP_DOC   = NO
+SEPARATE_MEMBER_PAGES  = NO
+TAB_SIZE               = 8
+ALIASES                = 
+OPTIMIZE_OUTPUT_FOR_C  = YES
+OPTIMIZE_OUTPUT_JAVA   = NO
+SUBGROUPING            = YES
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+EXTRACT_ALL            = NO
+EXTRACT_PRIVATE        = NO
+EXTRACT_STATIC         = NO
+EXTRACT_LOCAL_CLASSES  = NO
+EXTRACT_LOCAL_METHODS  = NO
+HIDE_UNDOC_MEMBERS     = NO
+HIDE_UNDOC_CLASSES     = NO
+HIDE_FRIEND_COMPOUNDS  = NO
+HIDE_IN_BODY_DOCS      = NO
+INTERNAL_DOCS          = NO
+CASE_SENSE_NAMES       = YES
+HIDE_SCOPE_NAMES       = NO
+SHOW_INCLUDE_FILES     = YES
+INLINE_INFO            = YES
+SORT_MEMBER_DOCS       = YES
+SORT_BRIEF_DOCS        = NO
+SORT_BY_SCOPE_NAME     = NO
+GENERATE_TODOLIST      = YES
+GENERATE_TESTLIST      = YES
+GENERATE_BUGLIST       = YES
+GENERATE_DEPRECATEDLIST= YES
+ENABLED_SECTIONS       = 
+MAX_INITIALIZER_LINES  = 30
+SHOW_USED_FILES        = YES
+SHOW_DIRECTORIES       = YES
+FILE_VERSION_FILTER    = 
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+QUIET                  = NO
+WARNINGS               = YES
+WARN_IF_UNDOCUMENTED   = YES
+WARN_IF_DOC_ERROR      = YES
+WARN_NO_PARAMDOC       = NO
+WARN_FORMAT            = "$file:$line: $text"
+WARN_LOGFILE           = 
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(top_srcdir)/include/
+FILE_PATTERNS          = *.h
+RECURSIVE              = YES
+EXCLUDE                = 
+EXCLUDE_SYMLINKS       = NO
+EXCLUDE_PATTERNS       = 
+EXAMPLE_PATH           = 
+EXAMPLE_PATTERNS       = 
+EXAMPLE_RECURSIVE      = NO
+IMAGE_PATH             = 
+INPUT_FILTER           = 
+FILTER_PATTERNS        = 
+FILTER_SOURCE_FILES    = NO
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+SOURCE_BROWSER         = NO
+INLINE_SOURCES         = NO
+STRIP_CODE_COMMENTS    = YES
+REFERENCED_BY_RELATION = NO
+REFERENCES_RELATION    = NO
+USE_HTAGS              = NO
+VERBATIM_HEADERS       = NO
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+ALPHABETICAL_INDEX     = NO
+COLS_IN_ALPHA_INDEX    = 5
+IGNORE_PREFIX          = 
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+GENERATE_HTML          = YES
+HTML_OUTPUT            = html
+HTML_FILE_EXTENSION    = .html
+HTML_HEADER            = 
+HTML_FOOTER            = 
+HTML_STYLESHEET        = 
+HTML_ALIGN_MEMBERS     = YES
+GENERATE_HTMLHELP      = NO
+CHM_FILE               = 
+HHC_LOCATION           = 
+GENERATE_CHI           = NO
+BINARY_TOC             = NO
+TOC_EXPAND             = NO
+DISABLE_INDEX          = NO
+ENUM_VALUES_PER_LINE   = 4
+GENERATE_TREEVIEW      = NO
+TREEVIEW_WIDTH         = 250
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+GENERATE_LATEX         = NO
+LATEX_OUTPUT           = latex
+LATEX_CMD_NAME         = latex
+MAKEINDEX_CMD_NAME     = makeindex
+COMPACT_LATEX          = NO
+PAPER_TYPE             = a4wide
+EXTRA_PACKAGES         = 
+LATEX_HEADER           = 
+PDF_HYPERLINKS         = NO
+USE_PDFLATEX           = NO
+LATEX_BATCHMODE        = NO
+LATEX_HIDE_INDICES     = NO
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+GENERATE_RTF           = NO
+RTF_OUTPUT             = rtf
+COMPACT_RTF            = NO
+RTF_HYPERLINKS         = NO
+RTF_STYLESHEET_FILE    = 
+RTF_EXTENSIONS_FILE    = 
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+GENERATE_MAN           = NO
+MAN_OUTPUT             = man
+MAN_EXTENSION          = .3
+MAN_LINKS              = NO
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+GENERATE_XML           = NO
+XML_OUTPUT             = xml
+XML_SCHEMA             = 
+XML_DTD                = 
+XML_PROGRAMLISTING     = YES
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+GENERATE_AUTOGEN_DEF   = NO
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+GENERATE_PERLMOD       = NO
+PERLMOD_LATEX          = NO
+PERLMOD_PRETTY         = YES
+PERLMOD_MAKEVAR_PREFIX = 
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor   
+#---------------------------------------------------------------------------
+ENABLE_PREPROCESSING   = YES
+MACRO_EXPANSION        = NO
+EXPAND_ONLY_PREDEF     = NO
+SEARCH_INCLUDES        = YES
+INCLUDE_PATH           = 
+INCLUDE_FILE_PATTERNS  = 
+PREDEFINED             = 
+EXPAND_AS_DEFINED      = 
+SKIP_FUNCTION_MACROS   = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references   
+#---------------------------------------------------------------------------
+TAGFILES               = 
+GENERATE_TAGFILE       = 
+ALLEXTERNALS           = NO
+EXTERNAL_GROUPS        = YES
+PERL_PATH              = /usr/bin/perl
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool   
+#---------------------------------------------------------------------------
+CLASS_DIAGRAMS         = NO
+HIDE_UNDOC_RELATIONS   = YES
+HAVE_DOT               = NO
+CLASS_GRAPH            = YES
+COLLABORATION_GRAPH    = YES
+GROUP_GRAPHS           = YES
+UML_LOOK               = NO
+TEMPLATE_RELATIONS     = NO
+INCLUDE_GRAPH          = YES
+INCLUDED_BY_GRAPH      = YES
+CALL_GRAPH             = NO
+GRAPHICAL_HIERARCHY    = YES
+DIRECTORY_GRAPH        = YES
+DOT_IMAGE_FORMAT       = png
+DOT_PATH               = 
+DOTFILE_DIRS           = 
+MAX_DOT_GRAPH_WIDTH    = 1024
+MAX_DOT_GRAPH_HEIGHT   = 1024
+MAX_DOT_GRAPH_DEPTH    = 0
+DOT_TRANSPARENT        = NO
+DOT_MULTI_TARGETS      = NO
+GENERATE_LEGEND        = YES
+DOT_CLEANUP            = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to the search engine   
+#---------------------------------------------------------------------------
+SEARCHENGINE           = NO

include/Makefile.am

-nobase_include_HEADERS = yaml/yaml.h yaml/yaml_version.h yaml/yaml_error.h
+INCLUDES = yaml/yaml.h yaml/yaml_version.h yaml/yaml_error.h
+DOXYGEN_CFG = $(top_srcdir)/doc/doxygen.cfg
+
+nobase_include_HEADERS = $(INCLUDES)
+
+if DOXYGEN
+
+html: $(INCLUDES) $(DOXYGEN_CFG)
+	PACKAGE=$(PACKAGE) VERSION=$(VERSION) top_srcdir=$(top_srcdir) top_builddir=$(top_builddir) doxygen $(DOXYGEN_CFG)
+
+endif
+
+distclean-local:
+	-rm -rf $(top_builddir)/doc/html
+
+dist-hook: html
+	cp -a $(top_builddir)/doc/html $(top_distdir)/doc

include/yaml/yaml.h

+/**
+ * @file yaml.h
+ * @brief Public interface for libyaml.
+ * 
+ * Include the header file with
+ * @code
+ * #include <yaml/yaml.h>
+ * @endcode
+ */
 
 #ifndef YAML_H
 #define YAML_H

include/yaml/yaml_version.h

+/**
+ * @file yaml_version.h
+ * @brief Version information.
+ *
+ * Do not include yaml_version.h directly.
+ */
+
 #ifndef YAML_VERSION_H
 #define YAML_VERSION_H
 
@@ -5,6 +12,10 @@
 extern "C" {
 #endif
 
+/**
+ * @brief Get the library version.
+ */
+
 const char *
 yaml_get_version_string(void);
 
@@ -8,6 +19,10 @@
 const char *
 yaml_get_version_string(void);
 
+/**
+ * @brief Get the library version numbers.
+ */
+
 void
 yaml_get_version(int *major, int *minor, int *patch);
 
@@ -11,9 +26,6 @@
 void
 yaml_get_version(int *major, int *minor, int *patch);
 
-int
-yaml_check_version(int major, int minor, int patch);
-
 #ifdef __cplusplus
 }
 #endif

src/version.c

@@ -19,11 +19,3 @@
     *patch = YAML_VERSION_PATCH;
 }
 
-int
-yaml_check_version(int major, int minor, int patch)
-{
-    return (major == YAML_VERSION_MAJOR
-            && minor == YAML_VERSION_MINOR
-            && patch >= YAML_VERSION_PATCH);
-}
-

tests/Makefile.am

 AM_CPPFLAGS = -I$(top_srcdir)/include
-LDADD = $(top_srcdir)/src/libyaml.la
+LDADD = $(top_builddir)/src/libyaml.la
 TESTS = test-version
 check_PROGRAMS = test-version

tests/test-version.c

@@ -7,9 +7,11 @@
 int
 main(void)
 {
-    int major, minor, patch;
+    int major = -1;
+    int minor = -1;
+    int patch = -1;
     char buf[64];
 
     yaml_get_version(&major, &minor, &patch);
     sprintf(buf, "%d.%d.%d", major, minor, patch);
     assert(strcmp(buf, yaml_get_version_string()) == 0);
@@ -11,13 +13,8 @@
     char buf[64];
 
     yaml_get_version(&major, &minor, &patch);
     sprintf(buf, "%d.%d.%d", major, minor, patch);
     assert(strcmp(buf, yaml_get_version_string()) == 0);
-    assert(yaml_check_version(major+1, minor, patch) == 0);
-    assert(yaml_check_version(major, minor+1, patch) == 0);
-    assert(yaml_check_version(major, minor, patch+1) == 1);
-    assert(yaml_check_version(major, minor, patch) == 1);
-    assert(yaml_check_version(major, minor, patch-1) == 0);
 
     return 0;
 }