Moved string handling functions from version header into its own TU.

Fix bug involving _mixin producing conflicting symbols: now using `gnu_inilne` (macro"d to `force_inline`), instead of `always_inline`

Fortune for naka's current commit: Blessing − 吉

include/macros.h

@@ -23,11 +23,12 @@
 
 #define noinline __attribute__((noinline))
 #define always_inline __attribute__((always_inline))
+#define force_inline __attribute__((gnu_inline))
 
 #ifdef DEBUG
-#define _mixin static inline always_inline
+#define _mixin static inline force_inline
 #else
-#define _mixin extern inline always_inline
+#define _mixin extern inline force_inline
 #endif
 
 #define unrestrict __attribute__((may_alias))

include/version.h

@@ -41,39 +41,23 @@ _mixin uint32_t v_ctoraw(version_t ver)
 
 #define VERSION_STRING_MAX AS(3 + 3 + 3 + 3 + 3, usize) // maj + min + bf + rev + (..r)
 
-//TODO: Move the below functions to `version.c` and have them prototyped, not mixins.
-
 /// Print a version to a string buffer `out`. Return the number of bytes written.
 ///
 /// Has the same semantics as `snprintf`; to calculate the length of the string needed to allocate, invoke like: `size_t sz = v_ctosn(vers, 0, NULL)`. The buffer should be allocated as `sz + 1`, and then the next call to `v_ctosn` should be like: `v_ctosn(vers, sz+1, buffer);
-_mixin usize v_ctosn(version_t ver, usize max, char out[static pOUT max])
+//XXX: Specifying `str[static ...` tells the compiler this function expects a non-null pointer. When in reality, a `NULL` pointer is used here as a sentinel value to not print... The mixin below is a hack around this, but this might introduce invalid optimisations. We should either: split the size getting function into its own thing (`v_ctosn_sz` would become a real function) that does the exact same thing as `v_ctosn(_,0,NULL)`, and not pass `NULL` to str here ever. OR, change str to regular `char *pOUT str`. The latter would be easier, but we might potentially lose out on some obscure non-NULL snprintf optimisation? For now, just use the `v_ctosn_sz` hack below. If we go with the latter, we can #define it to be just `v_ctosn(v, 0, NULL)`, otherwise move it to version.c and implement it with `snprintf(NULL, 0, ...)`.
+usize v_ctosn(version_t ver, usize max, char str[static pOUT max]);
+_mixin usize v_ctosn_sz(version_t ver)
 {
-	struct v_comp comp = ver.comp;
-	const char* const fmt = comp.revision ? "%hhu.%hhu.%hhur%hhu" : "%hhu.%hhu.%hhu";
-
-	
-	return snprintf(out, max, fmt, 
-			comp.major,
-			comp.minor,
-			comp.bugfix,
-			comp.revision);
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnonnull"
+	return v_ctosn(ver, 0, NULL);
+#pragma GCC diagnostic pop
 }
 
 /// Print a version to  a static string buffer. The string buffer is thread local. The next call to this function on the same thread will overwrite the returned buffer.
-_mixin const char* v_ctoss(version_t ver)
-{
-	_Thread_local static char buffer[VERSION_STRING_MAX+1];
-	buffer[v_ctosn(ver, VERSION_STRING_MAX+1, buffer)] = 0;
-	return buffer;
-}
+const char* v_ctoss(version_t ver);
 
 /// Print a version to a `malloc()`d string buffer. The buffer is unique and owned by the callee. The buffer must be `free()`d.
-_mixin char* v_ctos(version_t ver)
-{
-	usize sz = v_ctosn(ver, 0, NULL);
-	char* buf = malloc(sz+1);
-	v_ctosn(ver, sz+1, buf);
-	return buf;
-}
+char* v_ctos(version_t ver);
 
 #endif /* _VERSION_H */

src/main.c

@@ -13,10 +13,10 @@ int main(int argc, char** argv)
 	IGNORE(argc);
 	IGNORE(argv);
 
-	const u32 vraw = VERSION(1,2,3,240);
+	const u32 vraw = VERSION(100,200,101,255);
 	version_t vers = v_rawtoc(vraw);
 
-	usize sz = v_ctosn(vers, 0, NULL);
+	usize sz = v_ctosn_sz(vers);
 	char verstr[sz+1];
 	v_ctosn(vers, sz+1, verstr);
 

src/version.c

@@ -0,0 +1,34 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <version.h>
+
+usize v_ctosn(version_t ver, usize max, char out[static pOUT max])
+{
+	struct v_comp comp = ver.comp;
+	const char* const fmt = comp.revision ? "%hhu.%hhu.%hhur%hhu" : "%hhu.%hhu.%hhu";
+
+	
+	return snprintf(out, max, fmt, 
+			comp.major,
+			comp.minor,
+			comp.bugfix,
+			comp.revision);
+}
+
+const char* v_ctoss(version_t ver)
+{
+	_Thread_local static char buffer[VERSION_STRING_MAX+1];
+	buffer[v_ctosn(ver, VERSION_STRING_MAX+1, buffer)] = 0;
+	return buffer;
+}
+
+char* v_ctos(version_t ver)
+{
+	usize sz = v_ctosn_sz(ver);
+	char* buf = malloc(sz+1);
+	v_ctosn(ver, sz+1, buf);
+	return buf;
+}
+