/* String intrinsics helper functions.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright 2002, 2005, 2007 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
-This file is part of the GNU Fortran 95 runtime library (libgfor).
+This file is part of the GNU Fortran 95 runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
+modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
-version 2.1 of the License, or (at your option) any later version.
+version 2 of the License, or (at your option) any later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU Lesser General Public License for more details.
+GNU General Public License for more details.
-You should have received a copy of the GNU Lesser General Public
-License along with libgfor; see the file COPYING.LIB. If not,
-write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+You should have received a copy of the GNU General Public
+License along with libgfortran; see the file COPYING. If not,
+write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
/* Unlike what the name of this file suggests, we don't actually
compiler translates the actual intrinsics calls to calls to
functions in this file. */
+#include "libgfortran.h"
+
#include <stdlib.h>
#include <string.h>
-#include "libgfortran.h"
-
/* String functions. */
-#define copy_string prefix(copy_string)
-void copy_string (GFC_INTEGER_4, char *, GFC_INTEGER_4, const char *);
+extern void concat_string (GFC_INTEGER_4, char *,
+ GFC_INTEGER_4, const char *,
+ GFC_INTEGER_4, const char *);
+export_proto(concat_string);
-#define concat_string prefix(concat_string)
-void concat_string (GFC_INTEGER_4, char *,
- GFC_INTEGER_4, const char *,
- GFC_INTEGER_4, const char *);
+extern GFC_INTEGER_4 string_len_trim (GFC_INTEGER_4, const char *);
+export_proto(string_len_trim);
-#define string_len_trim prefix(string_len_trim)
-GFC_INTEGER_4 string_len_trim (GFC_INTEGER_4, const char *);
+extern void adjustl (char *, GFC_INTEGER_4, const char *);
+export_proto(adjustl);
-#define adjustl prefix(adjustl)
-void adjustl (char *, GFC_INTEGER_4, const char *);
+extern void adjustr (char *, GFC_INTEGER_4, const char *);
+export_proto(adjustr);
-#define adjustr prefix(adjustr)
-void adjustr (char *, GFC_INTEGER_4, const char *);
+extern GFC_INTEGER_4 string_index (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
+ const char *, GFC_LOGICAL_4);
+export_proto(string_index);
-#define string_index prefix(string_index)
-GFC_INTEGER_4 string_index (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
- const char *, GFC_LOGICAL_4);
+extern GFC_INTEGER_4 string_scan (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
+ const char *, GFC_LOGICAL_4);
+export_proto(string_scan);
-#define string_scan prefix(string_scan)
-GFC_INTEGER_4 string_scan (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
- const char *, GFC_LOGICAL_4);
+extern GFC_INTEGER_4 string_verify (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
+ const char *, GFC_LOGICAL_4);
+export_proto(string_verify);
-#define string_verify prefix(string_verify)
-GFC_INTEGER_4 string_verify (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
- const char *, GFC_LOGICAL_4);
+extern void string_trim (GFC_INTEGER_4 *, void **, GFC_INTEGER_4, const char *);
+export_proto(string_trim);
-#define string_trim prefix(string_trim)
-void string_trim (GFC_INTEGER_4 *, void **, GFC_INTEGER_4, const char *);
+extern void string_minmax (GFC_INTEGER_4 *, void **, int, int, ...);
+export_proto(string_minmax);
-#define string_repeat prefix(string_repeat)
-void string_repeat (char *, GFC_INTEGER_4, const char *, GFC_INTEGER_4);
-/* The two areas may overlap so we use memmove. */
-
-void
-copy_string (GFC_INTEGER_4 destlen, char * dest,
- GFC_INTEGER_4 srclen, const char * src)
-{
- if (srclen >= destlen)
- {
- /* This will truncate if too long. */
- memmove (dest, src, destlen);
- /*memcpy (dest, src, destlen);*/
- }
- else
- {
- memmove (dest, src, srclen);
- /*memcpy (dest, src, srclen);*/
- /* Pad with spaces. */
- memset (&dest[srclen], ' ', destlen - srclen);
- }
-}
+/* Use for functions which can return a zero-length string. */
+static char zero_length_string = '\0';
/* Strings of unequal length are extended with pad characters. */
-GFC_INTEGER_4
+int
compare_string (GFC_INTEGER_4 len1, const char * s1,
GFC_INTEGER_4 len2, const char * s2)
{
int res;
- const char *s;
+ const unsigned char *s;
int len;
- res = strncmp (s1, s2, (len1 < len2) ? len1 : len2);
+ res = memcmp (s1, s2, (len1 < len2) ? len1 : len2);
if (res != 0)
return res;
if (len1 < len2)
{
len = len2 - len1;
- s = &s2[len1];
+ s = (unsigned char *) &s2[len1];
res = -1;
}
else
{
len = len1 - len2;
- s = &s1[len2];
+ s = (unsigned char *) &s1[len2];
res = 1;
}
return 0;
}
+iexport(compare_string);
/* The destination and source should not overlap. */
}
*len = i + 1;
- if (*len > 0)
+ if (*len == 0)
+ *dest = &zero_length_string;
+ else
{
/* Allocate space for result string. */
- *dest = internal_malloc (*len);
+ *dest = internal_malloc_size (*len);
- /* copy string if necessary. */
+ /* Copy string if necessary. */
memmove (*dest, src, *len);
}
}
string_scan (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 setlen,
const char * set, GFC_LOGICAL_4 back)
{
- int start;
- int last;
- int i;
- int delta;
+ int i, j;
if (slen == 0 || setlen == 0)
return 0;
if (back)
{
- last = 0;
- start = slen - 1;
- delta = -1;
+ for (i = slen - 1; i >= 0; i--)
+ {
+ for (j = 0; j < setlen; j++)
+ {
+ if (str[i] == set[j])
+ return (i + 1);
+ }
+ }
}
else
{
- last = slen - 1;
- start = 0;
- delta = 1;
- }
-
- i = 0;
- for (; start != last; start += delta)
- {
- for (i = 0; i < setlen; i++)
- {
- if (str[start] == set[i])
- return (start + 1);
- }
+ for (i = 0; i < slen; i++)
+ {
+ for (j = 0; j < setlen; j++)
+ {
+ if (str[i] == set[j])
+ return (i + 1);
+ }
+ }
}
return 0;
/* Verify that a set of characters contains all the characters in a
- string by indentifying the position of the first character in a
- characters that dose not appear in a given set of characters. */
+ string by identifying the position of the first character in a
+ characters that does not appear in a given set of characters. */
GFC_INTEGER_4
string_verify (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 setlen,
}
-/* Concatenate several copies of a string. */
+/* MIN and MAX intrinsics for strings. The front-end makes sure that
+ nargs is at least 2. */
void
-string_repeat (char * dest, GFC_INTEGER_4 slen,
- const char * src, GFC_INTEGER_4 ncopies)
+string_minmax (GFC_INTEGER_4 *rlen, void **dest, int op, int nargs, ...)
{
+ va_list ap;
int i;
+ char * next, * res;
+ GFC_INTEGER_4 nextlen, reslen;
+
+ va_start (ap, nargs);
+ reslen = va_arg (ap, GFC_INTEGER_4);
+ res = va_arg (ap, char *);
+ *rlen = reslen;
- /* See if ncopies is valid. */
- if (ncopies < 0)
+ if (res == NULL)
+ runtime_error ("First argument of '%s' intrinsic should be present",
+ op > 0 ? "MAX" : "MIN");
+
+ for (i = 1; i < nargs; i++)
{
- /* The error is already reported. */
- runtime_error ("Augument NCOPIES is negative.");
+ nextlen = va_arg (ap, GFC_INTEGER_4);
+ next = va_arg (ap, char *);
+
+
+ if (next == NULL)
+ {
+ if (i == 1)
+ runtime_error ("Second argument of '%s' intrinsic should be "
+ "present", op > 0 ? "MAX" : "MIN");
+ else
+ continue;
+ }
+
+ if (nextlen > *rlen)
+ *rlen = nextlen;
+
+ if (op * compare_string (reslen, res, nextlen, next) < 0)
+ {
+ reslen = nextlen;
+ res = next;
+ }
}
+ va_end (ap);
- /* Copy characters. */
- for (i = 0; i < ncopies; i++)
+ if (*rlen == 0)
+ *dest = &zero_length_string;
+ else
{
- memmove (dest + (i * slen), src, slen);
+ char * tmp = internal_malloc_size (*rlen);
+ memcpy (tmp, res, reslen);
+ memset (&tmp[reslen], ' ', *rlen - reslen);
+ *dest = tmp;
}
}
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