Merge pull request #296 from nwellnhof/version_info

Improve version information

5 files changed, 47 insertions, 9 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 254c065..033a9be 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -47,6 +47,9 @@ set(PROGRAM_SOURCES
 
 include_directories(. ${CMAKE_CURRENT_BINARY_DIR})
 
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmark_version.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/cmark_version.h)
+
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libcmark.pc.in
   ${CMAKE_CURRENT_BINARY_DIR}/libcmark.pc @ONLY)
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libcmark.pc
@@ -73,8 +76,11 @@ elseif(CMAKE_COMPILER_IS_GNUCC OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
 endif ()
 
 add_library(${LIBRARY} SHARED ${LIBRARY_SOURCES})
-set_target_properties(${LIBRARY}
-  PROPERTIES OUTPUT_NAME "cmark")
+# Include minor version in soname as long as major version is 0.
+set_target_properties(${LIBRARY} PROPERTIES
+  OUTPUT_NAME "cmark"
+  SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
+  VERSION ${PROJECT_VERSION})
 
 set_property(TARGET ${LIBRARY}
   APPEND PROPERTY MACOSX_RPATH true)
@@ -92,7 +98,10 @@ install(TARGETS ${PROGRAM} ${LIBRARY}
   LIBRARY DESTINATION lib
   )
 
-install(FILES cmark.h ${CMAKE_CURRENT_BINARY_DIR}/cmark_export.h
+install(FILES
+  cmark.h
+  ${CMAKE_CURRENT_BINARY_DIR}/cmark_export.h
+  ${CMAKE_CURRENT_BINARY_DIR}/cmark_version.h
   DESTINATION include
   )
 
diff --git a/src/cmark.c b/src/cmark.c
index 1d7a500..2ec9be9 100644
--- a/src/cmark.c
+++ b/src/cmark.c
@@ -6,6 +6,9 @@
 #include "cmark.h"
 #include "buffer.h"
 
+const int cmark_version = CMARK_VERSION;
+const char cmark_version_string[] = CMARK_VERSION_STRING;
+
 char *cmark_markdown_to_html(const char *text, int len)
 {
 	cmark_node *doc;
diff --git a/src/cmark.h b/src/cmark.h
index 8177fa8..9f312bc 100644
--- a/src/cmark.h
+++ b/src/cmark.h
@@ -2,7 +2,8 @@
 #define CMARK_H
 
 #include <stdio.h>
-#include "cmark_export.h"
+#include <cmark_export.h>
+#include <cmark_version.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -18,10 +19,6 @@ extern "C" {
  * ## Simple Interface
  */
 
-/** Current version of library.
- */
-#define CMARK_VERSION "0.1"
-
 /** Convert 'text' (assumed to be a UTF-8 encoded string with length
  * 'len' from CommonMark Markdown to HTML, returning a null-terminated,
  * UTF-8-encoded string.
@@ -499,6 +496,28 @@ char *cmark_render_man(cmark_node *root, long options);
  */
 #define CMARK_OPT_NORMALIZE 4
 
+/**
+ * ## Version information
+ */
+
+/** The library version as integer for runtime checks. Also available as
+ * macro CMARK_VERSION for compile time checks.
+ *
+ * * Bits 16-23 contain the major version.
+ * * Bits 8-15 contain the minor version.
+ * * Bits 0-7 contain the patchlevel.
+ *
+ * In hexadecimal format, the number 0x010203 represents version 1.2.3.
+ */
+CMARK_EXPORT
+extern const int cmark_version;
+
+/** The library version string for runtime checks. Also available as
+ * macro CMARK_VERSION_STRING for compile time checks.
+ */
+CMARK_EXPORT
+extern const char cmark_version_string[];
+
 /** # AUTHORS
  *
  * John MacFarlane, Vicent Marti,  Kārlis Gaņģis, Nick Wellnhofer.
diff --git a/src/cmark_version.h.in b/src/cmark_version.h.in
new file mode 100644
index 0000000..41de3ac
--- /dev/null
+++ b/src/cmark_version.h.in
@@ -0,0 +1,7 @@
+#ifndef CMARK_VERSION_H
+#define CMARK_VERSION_H
+
+#define CMARK_VERSION ((@PROJECT_VERSION_MAJOR@ << 16) | (@PROJECT_VERSION_MINOR@ << 8)  | @PROJECT_VERSION_PATCH@)
+#define CMARK_VERSION_STRING "@PROJECT_VERSION_MAJOR@.@PROJECT_VERSION_MINOR@.@PROJECT_VERSION_PATCH@"
+
+#endif
diff --git a/src/main.c b/src/main.c
index 5855868..ef40a88 100644
--- a/src/main.c
+++ b/src/main.c
@@ -73,7 +73,7 @@ int main(int argc, char *argv[])
 
 	for (i = 1; i < argc; i++) {
 		if (strcmp(argv[i], "--version") == 0) {
-			printf("cmark %s", CMARK_VERSION);
+			printf("cmark %s", CMARK_VERSION_STRING);
 			printf(" - CommonMark converter (c) 2014 John MacFarlane\n");
 			exit(0);
 		} else if (strcmp(argv[i], "--sourcepos") == 0) {