This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Support '%i' format and 'h' modifier in s?printf
authorChip Salzenberg <chip@perl.com>
Tue, 4 Feb 1997 23:54:13 +0000 (11:54 +1200)
committerChip Salzenberg <chip@atlantic.net>
Mon, 10 Feb 1997 19:29:00 +0000 (07:29 +1200)
doop.c
pod/perldelta.pod

diff --git a/doop.c b/doop.c
index cb5560c..f16ec64 100644 (file)
--- a/doop.c
+++ b/doop.c
@@ -149,10 +149,7 @@ register SV **sarg;
     register char *s;
     register char *t;
     register char *f;
-    bool dolong;
-#ifdef HAS_QUAD
-    bool doquad;
-#endif /* HAS_QUAD */
+    char dotype;
     char ch;
     register char *send;
     register SV *arg;
@@ -181,10 +178,7 @@ register SV **sarg;
        f = t;
        *buf = '\0';
        xs = buf;
-#ifdef HAS_QUAD
-       doquad =
-#endif /* HAS_QUAD */
-       dolong = FALSE;
+       dotype = '\0';
        pre = post = 0;
        for (t++; t < send; t++) {
            switch (*t) {
@@ -204,12 +198,14 @@ register SV **sarg;
                continue;
            case 'l':
 #ifdef HAS_QUAD
-               if (dolong) {
-                   dolong = FALSE;
-                   doquad = TRUE;
-               } else
+               if (dotype == 'l')
+                   dotype = 'q';
+               else
 #endif
-               dolong = TRUE;
+                   dotype = 'l';
+               continue;
+           case 'h':
+               dotype = 's';
                continue;
            case 'c':
                ch = *(++t);
@@ -226,38 +222,54 @@ register SV **sarg;
                }
                break;
            case 'D':
-               dolong = TRUE;
+               dotype = 'l';
                /* FALL THROUGH */
            case 'd':
+           case 'i':
                ch = *(++t);
                *t = '\0';
+               switch (dotype) {
 #ifdef HAS_QUAD
-               if (doquad)
-                   (void)sprintf(buf,s,(Quad_t)SvNV(arg));
-               else
+               case 'q':
+                   /* perl.h says that if quad is available, IV is quad */
+                   (void)sprintf(xs,f,(Quad_t)SvIV(arg));
+                   break;
 #endif
-               if (dolong)
-                   (void)sprintf(xs,f,(long)SvNV(arg));
-               else
-                   (void)sprintf(xs,f,SvIV(arg));
+               case 'l':
+                   (void)sprintf(xs,f,(long)SvIV(arg));
+                   break;
+               default:
+                   (void)sprintf(xs,f,(int)SvIV(arg));
+                   break;
+               case 's':
+                   (void)sprintf(xs,f,(short)SvIV(arg));
+                   break;
+               }
                xlen = strlen(xs);
                break;
            case 'X': case 'O':
-               dolong = TRUE;
+               dotype = 'l';
                /* FALL THROUGH */
            case 'x': case 'o': case 'u':
                ch = *(++t);
                *t = '\0';
-               value = SvNV(arg);
+               switch (dotype) {
 #ifdef HAS_QUAD
-               if (doquad)
-                   (void)sprintf(buf,s,(unsigned Quad_t)value);
-               else
+               case 'q':
+                   /* perl.h says that if quad is available, UV is quad */
+                   (void)sprintf(xs,f,(unsigned Quad_t)SvUV(arg));
+                   break;
 #endif
-               if (dolong)
-                   (void)sprintf(xs,f,U_L(value));
-               else
-                   (void)sprintf(xs,f,U_I(value));
+               case 'l':
+                   (void)sprintf(xs,f,(unsigned long)SvUV(arg));
+                   break;
+               default:
+                   (void)sprintf(xs,f,(unsigned int)SvUV(arg));
+                   break;
+               case 's':
+                   (void)sprintf(xs,f,(unsigned short)SvUV(arg));
+                   break;
+               }
                xlen = strlen(xs);
                break;
            case 'E': case 'e': case 'f': case 'G': case 'g':
index 56745d1..bfaeedc 100644 (file)
@@ -103,6 +103,12 @@ This now works.  (e.g. C<delete @ENV{'PATH', 'MANPATH'}>)
 is now supported on more platforms, and prefers fcntl
 to lockf when emulating.
 
+=item printf and sprintf
+
+now support "%i" as a synonym for "%d", and the "h" modifier.
+So "%hi" means "short integer in decimal", and "%ho" means
+"unsigned short integer as octal".
+
 =item keys as an lvalue
 
 As an lvalue, C<keys> allows you to increase the number of hash buckets