X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flibpspp%2Fstr.c;h=655774d63d57c8e1b9b146b9d513edc8abe2a387;hb=74fc00cc0eb769ab61141d290490037ba040f63a;hp=c72f19969ec8f1090f958e39c36a276f6b5b1f8f;hpb=8444d8d47de5e5f8d076b6f43f73c2c29494031e;p=pspp-builds.git

diff --git a/src/libpspp/str.c b/src/libpspp/str.c
index c72f1996..655774d6 100644
--- a/src/libpspp/str.c
+++ b/src/libpspp/str.c
@@ -18,13 +18,16 @@
    02110-1301, USA. */
 
 #include <config.h>
+
 #include "str.h"
-#include "message.h"
+
 #include <ctype.h>
 #include <limits.h>
 #include <stdlib.h>
-#include "alloc.h"
-#include "message.h"
+
+#include <libpspp/alloc.h>
+#include <libpspp/message.h>
+
 #include "minmax.h"
 #include "size_max.h"
 
@@ -233,6 +236,21 @@ str_lowercase (char *s)
   for (; *s != '\0'; s++)
     *s = tolower ((unsigned char) *s);
 }
+
+/* Formats FORMAT into DST, as with sprintf(), and returns the
+   address of the terminating null written to DST. */
+char *
+spprintf (char *dst, const char *format, ...) 
+{
+  va_list args;
+  int count;
+
+  va_start (args, format);
+  count = vsprintf (dst, format, args);
+  va_end (args);
+
+  return dst + count;
+}
 
 /* Initializes ST with initial contents S. */
 void
@@ -244,13 +262,13 @@ ds_create (struct string *st, const char *s)
   strcpy (st->string, s);
 }
 
-/* Initializes ST, making room for at least CAPACITY characters. */
+/* Initializes ST as an empty string. */
 void
-ds_init (struct string *st, size_t capacity)
+ds_init (struct string *st)
 {
   st->length = 0;
-  st->capacity = MAX (8, capacity);
-  st->string = xmalloc (st->capacity + 1);
+  st->capacity = 0;
+  st->string = NULL;
 }
 
 /* Frees ST. */
@@ -282,7 +300,7 @@ ds_init_substring (struct string *dst,
                    const struct string *src, size_t idx, size_t cnt)
 {
   assert (dst != src);
-  ds_init (dst, cnt);
+  ds_init (dst);
   ds_assign_substring (dst, src, idx, cnt);
 }
 
@@ -681,6 +699,21 @@ ds_concat (struct string *st, const char *buf, size_t len)
   st->length += len;
 }
 
+/* Returns ds_end(ST) and THEN increases the length by INCR. */
+char *
+ds_append_uninit(struct string *st, size_t incr)
+{
+  char *end;
+
+  ds_extend(st, ds_length(st) + incr);
+
+  end = ds_end(st);
+
+  st->length += incr;
+ 
+  return end;
+}
+
 /* Formats FORMAT as a printf string and appends the result to ST. */
 void
 ds_printf (struct string *st, const char *format, ...)
@@ -699,12 +732,8 @@ ds_vprintf (struct string *st, const char *format, va_list args_)
   int avail, needed;
   va_list args;
 
-#ifndef va_copy
-#define va_copy(DST, SRC) (DST) = (SRC)
-#endif
-
   va_copy (args, args_);
-  avail = st->capacity - st->length + 1;
+  avail = st->string != NULL ? st->capacity - st->length + 1 : 0;
   needed = vsnprintf (st->string + st->length, avail, format, args);
   va_end (args);