client API: add and use the MPV_MAKE_VERSION macro

This is probably nicer. The actual version number doesn't change (other
than the minor being incremented).

The "| 0UL" is to make the type unsigned long int, like it was before.

DOCS/client-api-changes.rst

@@ -25,6 +25,7 @@ API changes
 
 ::
 
+ 1.3    - add MPV_MAKE_VERSION()
  1.2    - remove "stream-time-pos" property (no replacement)
  1.1    - remap dvdnav:// to dvd://
         - add "--cache-file", "--cache-file-size"

libmpv/client.h

@@ -158,12 +158,11 @@ extern "C" {
  * number is incremented. This affects only C part, and not properties and
  * options.
  *
- * The version number is often converted into a human readable form by writing
- * the major and minor version number in decimal. E.g.:
- *      version 0x001001FF
- *      becomes 16.511 (dec(0x0010) + "." + dec(0x01FF))
+ * You can use MPV_MAKE_VERSION() and compare the result with integer
+ * relational operators (<, >, <=, >=).
  */
-#define MPV_CLIENT_API_VERSION 0x00010002UL
+#define MPV_MAKE_VERSION(major, minor) (((major) << 16) | (minor) | 0UL)
+#define MPV_CLIENT_API_VERSION MPV_MAKE_VERSION(1, 3)
 
 /**
  * Return the MPV_CLIENT_API_VERSION the mpv source has been compiled with.

wscript_build.py

@@ -450,11 +450,10 @@ def build(ctx):
     if build_shared or build_static:
         if build_shared:
             ctx.load("syms")
-        vnum = int(re.search('^#define MPV_CLIENT_API_VERSION 0x(.*)UL$',
-                             ctx.path.find_node("libmpv/client.h").read(),
-                             re.M)
-                   .group(1), 16)
-        libversion = str(vnum >> 16) + '.' + str(vnum & 0xffff) + '.0'
+        vre = '^#define MPV_CLIENT_API_VERSION MPV_MAKE_VERSION\((.*), (.*)\)$'
+        libmpv_header = ctx.path.find_node("libmpv/client.h").read()
+        major, minor = re.search(vre, libmpv_header, re.M).groups()
+        libversion = major + '.' + minor + '.0'
 
         def _build_libmpv(shared):
             features = "c "