Refactor *cvt functions implementation (2/2)

Changes since v3:

  - Converted into a standalone patch not to be squashed with the
    preceding patch (1/2).
  - Updated commit message.
  - Tested that installed stripped binaries for powerpc64le and x86_64
    remain identical before and after this patch.

Changes since v2:

  - Moved the removal of unused macros to a previous patch

Changes since v1:

  - Adapted after patch v1 19/31 (remove hidden_* uses) was dropped.
  - Fixed unintended removal of cvt* symbols on alpha and s390x
    (now tested with build-many-glibcs.py).

-- 8< --
This patch refactors the *cvt functions implementation in a way that
makes it easier to re-use them for implementing the IEEE long double on
powerpc64le.  By removing the macros that generate the function names
(APPEND combined with FUNC_PREFIX), the new code makes it easier to
define new function names, such as __qecvtieee128.

Tested that installed stripped binaries for powerpc64le and x86_64
remain identical before and after this patch.  Also tested for
powerpc64le, x86_64, as well as with the following build-many-glibcs
targets: alpha-linux-gnu, mips-linux-gnu, powerpc-linux-gnu-soft,
s390x-linux-gnu, and sparc64-linux-gnu.

Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>

6 files changed, 62 insertions, 59 deletions

diff --git a/misc/efgcvt-template.c b/misc/efgcvt-template.c
index aeb4e1ea01..7fabdf264d 100644
--- a/misc/efgcvt-template.c
+++ b/misc/efgcvt-template.c
@@ -25,8 +25,6 @@
 
 #define APPEND(a, b) APPEND2 (a, b)
 #define APPEND2(a, b) a##b
-#define __APPEND(a, b) __APPEND2 (a, b)
-#define __APPEND2(a, b) __##a##b
 
 
 #define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
@@ -39,13 +37,11 @@ static char ECVT_BUFFER[MAXDIG];
 libc_freeres_ptr (static char *FCVT_BUFPTR);
 
 char *
-__APPEND (FUNC_PREFIX, fcvt) (FLOAT_TYPE value, int ndigit, int *decpt,
-			      int *sign)
+__FCVT (FLOAT_TYPE value, int ndigit, int *decpt, int *sign)
 {
   if (FCVT_BUFPTR == NULL)
     {
-      if (__APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
-					  FCVT_BUFFER, MAXDIG) != -1)
+      if (__FCVT_R (value, ndigit, decpt, sign, FCVT_BUFFER, MAXDIG) != -1)
 	return FCVT_BUFFER;
 
       FCVT_BUFPTR = (char *) malloc (FCVT_MAXDIG);
@@ -53,25 +49,22 @@ __APPEND (FUNC_PREFIX, fcvt) (FLOAT_TYPE value, int ndigit, int *decpt,
 	return FCVT_BUFFER;
     }
 
-  (void) __APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
-					 FCVT_BUFPTR, FCVT_MAXDIG);
+  (void) __FCVT_R (value, ndigit, decpt, sign, FCVT_BUFPTR, FCVT_MAXDIG);
 
   return FCVT_BUFPTR;
 }
 
 
 char *
-__APPEND (FUNC_PREFIX, ecvt) (FLOAT_TYPE value, int ndigit, int *decpt,
-			      int *sign)
+__ECVT (FLOAT_TYPE value, int ndigit, int *decpt, int *sign)
 {
-  (void) __APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign,
-					 ECVT_BUFFER, MAXDIG);
+  (void) __ECVT_R (value, ndigit, decpt, sign, ECVT_BUFFER, MAXDIG);
 
   return ECVT_BUFFER;
 }
 
 char *
-__APPEND (FUNC_PREFIX, gcvt) (FLOAT_TYPE value, int ndigit, char *buf)
+__GCVT (FLOAT_TYPE value, int ndigit, char *buf)
 {
   sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value);
   return buf;
diff --git a/misc/efgcvt.c b/misc/efgcvt.c
index 9021b03bca..ddf306941a 100644
--- a/misc/efgcvt.c
+++ b/misc/efgcvt.c
@@ -16,20 +16,27 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#define ECVT ecvt
+#define FCVT fcvt
+#define GCVT gcvt
+#define __ECVT __ecvt
+#define __FCVT __fcvt
+#define __GCVT __gcvt
+#define __ECVT_R __ecvt_r
+#define __FCVT_R __fcvt_r
 #include <efgcvt-dbl-macros.h>
 #include <efgcvt-template.c>
 
 #if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
-# define cvt_symbol(symbol) \
-  cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
-	      APPEND (q, symbol), GLIBC_2_0); \
-  strong_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
+# define cvt_symbol(local, symbol) \
+  cvt_symbol_1 (libc, local, APPEND (q, symbol), GLIBC_2_0); \
+  strong_alias (local, symbol)
 # define cvt_symbol_1(lib, local, symbol, version) \
   compat_symbol (lib, local, symbol, version)
 #else
-# define cvt_symbol(symbol) \
-  strong_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
+# define cvt_symbol(local, symbol) \
+  strong_alias (local, symbol)
 #endif
-cvt_symbol(fcvt);
-cvt_symbol(ecvt);
-cvt_symbol(gcvt);
+cvt_symbol (__fcvt, fcvt);
+cvt_symbol (__ecvt, ecvt);
+cvt_symbol (__gcvt, gcvt);
diff --git a/misc/efgcvt_r-template.c b/misc/efgcvt_r-template.c
index 1cd335afe7..977750118c 100644
--- a/misc/efgcvt_r-template.c
+++ b/misc/efgcvt_r-template.c
@@ -28,12 +28,10 @@
 
 #define APPEND(a, b) APPEND2 (a, b)
 #define APPEND2(a, b) a##b
-#define __APPEND(a, b) __APPEND2 (a, b)
-#define __APPEND2(a, b) __##a##b
 
 int
-__APPEND (FUNC_PREFIX, fcvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
-				int *sign, char *buf, size_t len)
+__FCVT_R (FLOAT_TYPE value, int ndigit, int *decpt, int *sign,
+	  char *buf, size_t len)
 {
   ssize_t n;
   ssize_t i;
@@ -127,8 +125,8 @@ __APPEND (FUNC_PREFIX, fcvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
 }
 
 int
-__APPEND (FUNC_PREFIX, ecvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
-				int *sign, char *buf, size_t len)
+__ECVT_R (FLOAT_TYPE value, int ndigit, int *decpt, int *sign,
+	  char *buf, size_t len)
 {
   int exponent = 0;
 
@@ -187,8 +185,8 @@ __APPEND (FUNC_PREFIX, ecvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
       *sign = isfinite (value) ? signbit (value) != 0 : 0;
     }
   else
-    if (__APPEND (FUNC_PREFIX, fcvt_r) (value, MIN (ndigit, NDIGIT_MAX) - 1,
-					decpt, sign, buf, len))
+    if (__FCVT_R (value, MIN (ndigit, NDIGIT_MAX) - 1,
+		  decpt, sign, buf, len))
       return -1;
 
   *decpt += exponent;
diff --git a/misc/efgcvt_r.c b/misc/efgcvt_r.c
index ad78f153ba..5dabcad3c7 100644
--- a/misc/efgcvt_r.c
+++ b/misc/efgcvt_r.c
@@ -16,23 +16,24 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#define ECVT_R ecvt_r
+#define FCVT_R fcvt_r
+#define __ECVT_R __ecvt_r
+#define __FCVT_R __fcvt_r
 #include <efgcvt-dbl-macros.h>
 #include <efgcvt_r-template.c>
 
 #if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
-# define cvt_symbol(symbol) \
-  cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
-	      APPEND (q, symbol), GLIBC_2_0); \
-  weak_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
+# define cvt_symbol(local, symbol) \
+  cvt_symbol_1 (libc, local, APPEND (q, symbol), GLIBC_2_0); \
+  weak_alias (local, symbol)
 # define cvt_symbol_1(lib, local, symbol, version) \
   libc_hidden_def (local) \
   compat_symbol (lib, local, symbol, version)
 #else
-# define cvt_symbol(symbol) \
-  cvt_symbol_1 (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
-#  define cvt_symbol_1(local, symbol) \
+# define cvt_symbol(local, symbol) \
   libc_hidden_def (local) \
   weak_alias (local, symbol)
 #endif
-cvt_symbol(fcvt_r);
-cvt_symbol(ecvt_r);
+cvt_symbol (__fcvt_r, fcvt_r);
+cvt_symbol (__ecvt_r, ecvt_r);
diff --git a/misc/qefgcvt.c b/misc/qefgcvt.c
index 8f1582a50e..903bf93aa4 100644
--- a/misc/qefgcvt.c
+++ b/misc/qefgcvt.c
@@ -16,19 +16,24 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#define ECVT qecvt
+#define FCVT qfcvt
+#define GCVT qgcvt
+#define __ECVT __qecvt
+#define __FCVT __qfcvt
+#define __GCVT __qgcvt
+#define __ECVT_R __qecvt_r
+#define __FCVT_R __qfcvt_r
 #include <efgcvt-ldbl-macros.h>
 #include <efgcvt-template.c>
 
 #if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
-# define cvt_symbol(symbol) \
-  cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
-	      APPEND (FUNC_PREFIX, symbol), GLIBC_2_4)
-# define cvt_symbol_1(lib, local, symbol, version) \
-    versioned_symbol (lib, local, symbol, version)
+# define cvt_symbol(local, symbol) \
+  versioned_symbol (libc, local, symbol, GLIBC_2_4)
 #else
-# define cvt_symbol(symbol) \
-  strong_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
+# define cvt_symbol(local, symbol) \
+  strong_alias (local, symbol)
 #endif
-cvt_symbol(fcvt);
-cvt_symbol(ecvt);
-cvt_symbol(gcvt);
+cvt_symbol (__qfcvt, qfcvt);
+cvt_symbol (__qecvt, qecvt);
+cvt_symbol (__qgcvt, qgcvt);
diff --git a/misc/qefgcvt_r.c b/misc/qefgcvt_r.c
index 4240f1da2b..b790bf7837 100644
--- a/misc/qefgcvt_r.c
+++ b/misc/qefgcvt_r.c
@@ -17,22 +17,21 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#define ECVT_R qecvt_r
+#define FCVT_R qfcvt_r
+#define __ECVT_R __qecvt_r
+#define __FCVT_R __qfcvt_r
 #include <efgcvt-ldbl-macros.h>
 #include <efgcvt_r-template.c>
 
 #if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
-# define cvt_symbol(symbol) \
-  cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
-	      APPEND (FUNC_PREFIX, symbol), GLIBC_2_4)
-# define cvt_symbol_1(lib, local, symbol, version) \
+# define cvt_symbol(local, symbol) \
   libc_hidden_def (local) \
-  versioned_symbol (lib, local, symbol, version)
+  versioned_symbol (libc, local, symbol, GLIBC_2_4)
 #else
-# define cvt_symbol(symbol) \
-  cvt_symbol_1 (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
-#  define cvt_symbol_1(local, symbol) \
+# define cvt_symbol(local, symbol) \
   libc_hidden_def (local) \
   weak_alias (local, symbol)
 #endif
-cvt_symbol(fcvt_r);
-cvt_symbol(ecvt_r);
+cvt_symbol (__qfcvt_r, qfcvt_r);
+cvt_symbol (__qecvt_r, qecvt_r);