X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fformat.c;h=1c09e26c395bf5f6fc2f368392ce9f5ac2f38330;hb=d7b5d9144738a5a8989d45a01f4e458a78b68c0b;hp=bed7241884099b14864c2c3f0e69104f8a0ee00e;hpb=3a7fba81ceae5b049d0f7d671e9e3c3c43bbf703;p=pspp

diff --git a/src/format.c b/src/format.c
index bed7241884..1c09e26c39 100644
--- a/src/format.c
+++ b/src/format.c
@@ -14,18 +14,22 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA. */
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA. */
 
 #include <config.h>
 #include "format.h"
 #include <ctype.h>
-#include <assert.h>
+#include "error.h"
 #include <stdlib.h>
 #include "error.h"
-#include "lexer.h"
+#include "lex-def.h"
 #include "misc.h"
 #include "str.h"
+#include "var.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
 
 #define DEFFMT(LABEL, NAME, N_ARGS, IMIN_W, IMAX_W, OMIN_W, OMAX_W, CAT, \
 	       OUTPUT, SPSS_FMT) \
@@ -36,51 +40,8 @@ struct fmt_desc formats[FMT_NUMBER_OF_FORMATS + 1] =
   {"",         -1, -1,  -1, -1,   -1, 0000, -1, -1},
 };
 
-const int translate_fmt[40] =
-  {
-    -1, FMT_A, FMT_AHEX, FMT_COMMA, FMT_DOLLAR, FMT_F, FMT_IB,
-    FMT_PIBHEX, FMT_P, FMT_PIB, FMT_PK, FMT_RB, FMT_RBHEX, -1,
-    -1, FMT_Z, FMT_N, FMT_E, -1, -1, FMT_DATE, FMT_TIME,
-    FMT_DATETIME, FMT_ADATE, FMT_JDATE, FMT_DTIME, FMT_WKDAY,
-    FMT_MONTH, FMT_MOYR, FMT_QYR, FMT_WKYR, FMT_PCT, FMT_DOT,
-    FMT_CCA, FMT_CCB, FMT_CCC, FMT_CCD, FMT_CCE, FMT_EDATE,
-    FMT_SDATE,
-  };
-
-int
-parse_format_specifier_name (const char **cp, int allow_xt)
-{
-  struct fmt_desc *f;
-  char *ep;
-  int x;
-
-  ep = ds_value (&tokstr);
-  while (isalpha ((unsigned char) *ep))
-    ep++;
-  x = *ep;
-  *ep = 0;
-
-  for (f = formats; f->name[0]; f++)
-    if (!strcmp (f->name, ds_value (&tokstr)))
-      {
-	int indx = f - formats;
-
-	*ep = x;
-	if (cp)
-	  *cp = ep;
-
-	if (!allow_xt && (indx == FMT_T || indx == FMT_X))
-	  {
-	    msg (SE, _("X and T format specifiers not allowed here."));
-	    return -1;
-	  }
-	return indx;
-      }
-
-  msg (SE, _("%s is not a valid data format."), ds_value (&tokstr));
-  *ep = x;
-  return -1;
-}
+/* Common formats. */
+const struct fmt_spec f8_2 = {FMT_F, 8, 2};
 
 /* Converts F to its string representation (for instance, "F8.2") and
    returns a pointer to a static buffer containing that string. */
@@ -96,109 +57,158 @@ fmt_to_string (const struct fmt_spec *f)
   return buf;
 }
 
+/* Does checks in common betwen check_input_specifier() and
+   check_output_specifier() and returns true if so.  Otherwise,
+   emits an error message (if EMIT_ERROR is nonzero) and returns
+   false. */
+static bool
+check_common_specifier (const struct fmt_spec *spec, bool emit_error)
+{
+  struct fmt_desc *f = &formats[spec->type];
+  char *str = fmt_to_string (spec);
+
+  if ((f->cat & FCAT_EVEN_WIDTH) && spec->w % 2)
+    {
+      if (emit_error)
+        msg (SE, _("Format %s specifies an odd width %d, but "
+                   "an even width is required."),
+             str, spec->w);
+      return false;
+    }
+  if (f->n_args > 1 && (spec->d < 0 || spec->d > 16))
+    {
+      if (emit_error)
+        msg (SE, _("Format %s specifies a bad number of "
+                   "implied decimal places %d.  Input format %s allows "
+                   "up to 16 implied decimal places."), str, spec->d, f->name);
+      return false;
+    }
+  return true;
+}
+
+/* Checks whether SPEC is valid as an input format and returns
+   nonzero if so.  Otherwise, emits an error message (if
+   EMIT_ERROR is nonzero) and returns zero. */
 int
-check_input_specifier (const struct fmt_spec *spec)
+check_input_specifier (const struct fmt_spec *spec, int emit_error)
 {
-  struct fmt_desc *f;
-  char *str;
+  struct fmt_desc *f = &formats[spec->type];
+  char *str = fmt_to_string (spec);
 
-  f = &formats[spec->type];
-  str = fmt_to_string (spec);
+  if (!check_common_specifier (spec, emit_error))
+    return false;
   if (spec->type == FMT_X)
     return 1;
   if (f->cat & FCAT_OUTPUT_ONLY)
     {
-      msg (SE, _("Format %s may not be used as an input format."), f->name);
+      if (emit_error)
+        msg (SE, _("Format %s may not be used for input."), f->name);
       return 0;
     }
   if (spec->w < f->Imin_w || spec->w > f->Imax_w)
     {
-      msg (SE, _("Input format %s specifies a bad width %d.  "
-		 "Format %s requires a width between %d and %d."),
-	   str, spec->w, f->name, f->Imin_w, f->Imax_w);
-      return 0;
-    }
-  if ((f->cat & FCAT_EVEN_WIDTH) && spec->w % 2)
-    {
-      msg (SE, _("Input format %s specifies an odd width %d, but "
-		 "format %s requires an even width between %d and "
-		 "%d."), str, spec->w, f->name, f->Imin_w, f->Imax_w);
+      if (emit_error)
+        msg (SE, _("Input format %s specifies a bad width %d.  "
+                   "Format %s requires a width between %d and %d."),
+             str, spec->w, f->name, f->Imin_w, f->Imax_w);
       return 0;
     }
-  if (f->n_args > 1 && (spec->d < 0 || spec->d > 16))
+  if ((spec->type == FMT_F || spec->type == FMT_COMMA
+	  || spec->type == FMT_DOLLAR)
+      && spec->d > spec->w)
     {
-      msg (SE, _("Input format %s specifies a bad number of "
-		 "implied decimal places %d.  Input format %s allows "
-		 "up to 16 implied decimal places."), str, spec->d, f->name);
+      if (emit_error)
+        msg (SE, _("Input format %s is invalid because it specifies more "
+                   "decimal places than the field width."), str);
       return 0;
     }
   return 1;
 }
 
+/* Checks whether SPEC is valid as an output format and returns
+   nonzero if so.  Otherwise, emits an error message (if
+   EMIT_ERROR is nonzero) and returns zero. */
 int
-check_output_specifier (const struct fmt_spec *spec)
+check_output_specifier (const struct fmt_spec *spec, int emit_error)
 {
-  struct fmt_desc *f;
-  char *str;
+  struct fmt_desc *f = &formats[spec->type];
+  char *str = fmt_to_string (spec);
 
-  f = &formats[spec->type];
-  str = fmt_to_string (spec);
+  if (!check_common_specifier (spec, emit_error))
+    return false;
   if (spec->type == FMT_X)
     return 1;
   if (spec->w < f->Omin_w || spec->w > f->Omax_w)
     {
-      msg (SE, _("Output format %s specifies a bad width %d.  "
-		 "Format %s requires a width between %d and %d."),
-	   str, spec->w, f->name, f->Omin_w, f->Omax_w);
+      if (emit_error)
+        msg (SE, _("Output format %s specifies a bad width %d.  "
+                   "Format %s requires a width between %d and %d."),
+             str, spec->w, f->name, f->Omin_w, f->Omax_w);
       return 0;
     }
-  if (spec->d > 1
-      && (spec->type == FMT_F || spec->type == FMT_COMMA
+  if ((spec->type == FMT_F || spec->type == FMT_COMMA
 	  || spec->type == FMT_DOLLAR)
-      && spec->w < f->Omin_w + 1 + spec->d)
+      && spec->d >= spec->w)
     {
-      msg (SE, _("Output format %s requires minimum width %d to allow "
-		 "%d decimal places.  Try %s%d.%d instead of %s."),
-	   f->name, f->Omin_w + 1 + spec->d, spec->d, f->name,
-	   f->Omin_w + 1 + spec->d, spec->d, str);
-      return 0;
-    }
-  if ((f->cat & FCAT_EVEN_WIDTH) && spec->w % 2)
-    {
-      msg (SE, _("Output format %s specifies an odd width %d, but "
-		 "output format %s requires an even width between %d and "
-		 "%d."), str, spec->w, f->name, f->Omin_w, f->Omax_w);
-      return 0;
-    }
-  if (f->n_args > 1 && (spec->d < 0 || spec->d > 16))
-    {
-      msg (SE, _("Output format %s specifies a bad number of "
-		 "implied decimal places %d.  Output format %s allows "
-		 "a number of implied decimal places between 1 "
-		 "and 16."), str, spec->d, f->name);
+      if (emit_error)
+        msg (SE, _("Output format %s is invalid because it specifies as "
+                   "many decimal places as the field width, which "
+                   "fails to allow space for a decimal point.  "
+                   "Try %s%d.%d instead."),
+             str, f->name, spec->d + 1, spec->d);
       return 0;
     }
   return 1;
 }
 
-/* If a string variable has width W, you can't display it with a
-   format specifier with a required width MIN_LEN>W. */
-int
-check_string_specifier (const struct fmt_spec *f, int min_len)
+/* Checks that FORMAT is appropriate for a variable of the given
+   TYPE and returns true if so.  Otherwise returns false and (if
+   EMIT_ERROR is true) emits an error message. */
+bool
+check_specifier_type (const struct fmt_spec *format,
+                      int type, bool emit_error) 
 {
-  if ((f->type == FMT_A && min_len > f->w)
-      || (f->type == FMT_AHEX && min_len * 2 > f->w))
+  const struct fmt_desc *f = &formats[format->type];
+  assert (type == NUMERIC || type == ALPHA);
+  if ((type == ALPHA) != ((f->cat & FCAT_STRING) != 0))
     {
-      msg (SE, _("Can't display a string variable of width %d with "
-		 "format specifier %s."), min_len, fmt_to_string (f));
-      return 0;
+      if (emit_error)
+        msg (SE, _("%s variables are not compatible with %s format %s."),
+             type == ALPHA ? _("String") : _("Numeric"),
+             type == ALPHA ? _("numeric") : _("string"),
+             fmt_to_string (format));
+      return false;
     }
-  return 1;
+  return true;
+}
+  
+/* Checks that FORMAT is appropriate for a variable of the given
+   WIDTH and returns true if so.  Otherwise returns false and (if
+   EMIT_ERROR is true) emits an error message. */
+bool
+check_specifier_width (const struct fmt_spec *format,
+                       int width, bool emit_error) 
+{
+  if (!check_specifier_type (format, width != 0 ? ALPHA : NUMERIC, emit_error))
+    return false;
+  if (get_format_var_width (format) != width)
+    {
+      if (emit_error)
+        msg (SE, _("String variable with width %d not compatible with "
+                   "format %s."),
+             width, fmt_to_string (format));
+      return false;
+    }
+  return true;
 }
 
+/* Converts input format specifier INPUT into output format
+   specifier OUTPUT. */
 void
 convert_fmt_ItoO (const struct fmt_spec *input, struct fmt_spec *output)
 {
+  assert (check_input_specifier (input, 0));
+
   output->type = formats[input->type].output;
   output->w = input->w;
   if (output->w > formats[output->type].Omax_w)
@@ -209,8 +219,8 @@ convert_fmt_ItoO (const struct fmt_spec *input, struct fmt_spec *output)
     {
     case FMT_F:
     case FMT_N:
-      if (output->d > 1 && output->w < 2 + output->d)
-	output->w = 2 + output->d;
+      if (output->d > 0)
+	output->w++;
       break;
     case FMT_E:
       output->w = max (max (input->w, input->d+7), 10);
@@ -286,57 +296,59 @@ convert_fmt_ItoO (const struct fmt_spec *input, struct fmt_spec *output)
     default:
       assert (0);
     }
+
+  assert (check_output_specifier (output, 0));
 }
 
+/* Returns the width corresponding to the format specifier.  The
+   return value is the value of the `width' member of a `struct
+   variable' for such an input format. */
 int
-parse_format_specifier (struct fmt_spec *input, int allow_xt)
+get_format_var_width (const struct fmt_spec *spec) 
 {
-  struct fmt_spec spec;
-  struct fmt_desc *f;
-  const char *cp;
-  char *cp2;
-  int type, w, d;
-
-  if (token != T_ID)
-    {
-      msg (SE, _("Format specifier expected."));
-      return 0;
-    }
-  type = parse_format_specifier_name (&cp, allow_xt);
-  if (type == -1)
-    return 0;
-  f = &formats[type];
-
-  w = strtol (cp, &cp2, 10);
-  if (cp2 == cp && type != FMT_X)
-    {
-      msg (SE, _("Data format %s does not specify a width."),
-	   ds_value (&tokstr));
-      return 0;
-    }
-
-  cp = cp2;
-  if (f->n_args > 1 && *cp == '.')
-    {
-      cp++;
-      d = strtol (cp, &cp2, 10);
-      cp = cp2;
-    }
+  if (spec->type == FMT_AHEX)
+    return spec->w / 2;
+  else if (spec->type == FMT_A)
+    return spec->w;
   else
-    d = 0;
-
-  if (*cp)
-    {
-      msg (SE, _("Data format %s is not valid."), ds_value (&tokstr));
-      return 0;
-    }
-  lex_get ();
+    return 0;
+}
 
-  spec.type = type;
-  spec.w = w;
-  spec.d = d;
-  *input = spec;
+/* Returns the PSPP format corresponding to the given SPSS
+   format. */
+int
+translate_fmt (int spss) 
+{
+  int type;
+  
+  for (type = 0; type < FMT_NUMBER_OF_FORMATS; type++)
+    if (formats[type].spss == spss)
+      return type;
+  return -1;
+}
 
-  return 1;
+/* Returns an input format specification with type TYPE, width W,
+   and D decimals. */
+struct fmt_spec
+make_input_format (int type, int w, int d) 
+{
+  struct fmt_spec f;
+  f.type = type;
+  f.w = w;
+  f.d = d;
+  assert (check_input_specifier (&f, 0));
+  return f;
 }
 
+/* Returns an output format specification with type TYPE, width
+   W, and D decimals. */
+struct fmt_spec
+make_output_format (int type, int w, int d)
+{
+  struct fmt_spec f;
+  f.type = type;
+  f.w = w;
+  f.d = d;
+  assert (check_output_specifier (&f, 0));
+  return f;
+}