mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-29 08:54:42 +08:00
02c92593ed
PR libfortran/24787 * intrinsics/string_intrinsics.c (string_scan): Off by one; Fix typos in nearby comment. * gfortran.dg/scan_1.f90: New test. From-SVN: r106828
401 lines
8.4 KiB
C
401 lines
8.4 KiB
C
/* String intrinsics helper functions.
|
|
Copyright 2002, 2005 Free Software Foundation, Inc.
|
|
Contributed by Paul Brook <paul@nowt.org>
|
|
|
|
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 General Public
|
|
License as published by the Free Software Foundation; either
|
|
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 General Public License for more details.
|
|
|
|
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
|
|
implement the Fortran intrinsics here. At least, not with the
|
|
names they have in the standard. The functions here provide all
|
|
the support we need for the standard string intrinsics, and the
|
|
compiler translates the actual intrinsics calls to calls to
|
|
functions in this file. */
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "libgfortran.h"
|
|
|
|
|
|
/* String functions. */
|
|
|
|
extern void copy_string (GFC_INTEGER_4, char *, GFC_INTEGER_4, const char *);
|
|
export_proto(copy_string);
|
|
|
|
extern void concat_string (GFC_INTEGER_4, char *,
|
|
GFC_INTEGER_4, const char *,
|
|
GFC_INTEGER_4, const char *);
|
|
export_proto(concat_string);
|
|
|
|
extern GFC_INTEGER_4 string_len_trim (GFC_INTEGER_4, const char *);
|
|
export_proto(string_len_trim);
|
|
|
|
extern void adjustl (char *, GFC_INTEGER_4, const char *);
|
|
export_proto(adjustl);
|
|
|
|
extern void adjustr (char *, GFC_INTEGER_4, const char *);
|
|
export_proto(adjustr);
|
|
|
|
extern GFC_INTEGER_4 string_index (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
|
|
const char *, GFC_LOGICAL_4);
|
|
export_proto(string_index);
|
|
|
|
extern GFC_INTEGER_4 string_scan (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
|
|
const char *, GFC_LOGICAL_4);
|
|
export_proto(string_scan);
|
|
|
|
extern GFC_INTEGER_4 string_verify (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
|
|
const char *, GFC_LOGICAL_4);
|
|
export_proto(string_verify);
|
|
|
|
extern void string_trim (GFC_INTEGER_4 *, void **, GFC_INTEGER_4, const char *);
|
|
export_proto(string_trim);
|
|
|
|
extern void string_repeat (char *, GFC_INTEGER_4, const char *, GFC_INTEGER_4);
|
|
export_proto(string_repeat);
|
|
|
|
/* 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);
|
|
}
|
|
else
|
|
{
|
|
memmove (dest, src, srclen);
|
|
/* Pad with spaces. */
|
|
memset (&dest[srclen], ' ', destlen - srclen);
|
|
}
|
|
}
|
|
|
|
|
|
/* Strings of unequal length are extended with pad characters. */
|
|
|
|
GFC_INTEGER_4
|
|
compare_string (GFC_INTEGER_4 len1, const char * s1,
|
|
GFC_INTEGER_4 len2, const char * s2)
|
|
{
|
|
int res;
|
|
const char *s;
|
|
int len;
|
|
|
|
res = strncmp (s1, s2, (len1 < len2) ? len1 : len2);
|
|
if (res != 0)
|
|
return res;
|
|
|
|
if (len1 == len2)
|
|
return 0;
|
|
|
|
if (len1 < len2)
|
|
{
|
|
len = len2 - len1;
|
|
s = &s2[len1];
|
|
res = -1;
|
|
}
|
|
else
|
|
{
|
|
len = len1 - len2;
|
|
s = &s1[len2];
|
|
res = 1;
|
|
}
|
|
|
|
while (len--)
|
|
{
|
|
if (*s != ' ')
|
|
{
|
|
if (*s > ' ')
|
|
return res;
|
|
else
|
|
return -res;
|
|
}
|
|
s++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
iexport(compare_string);
|
|
|
|
|
|
/* The destination and source should not overlap. */
|
|
|
|
void
|
|
concat_string (GFC_INTEGER_4 destlen, char * dest,
|
|
GFC_INTEGER_4 len1, const char * s1,
|
|
GFC_INTEGER_4 len2, const char * s2)
|
|
{
|
|
if (len1 >= destlen)
|
|
{
|
|
memcpy (dest, s1, destlen);
|
|
return;
|
|
}
|
|
memcpy (dest, s1, len1);
|
|
dest += len1;
|
|
destlen -= len1;
|
|
|
|
if (len2 >= destlen)
|
|
{
|
|
memcpy (dest, s2, destlen);
|
|
return;
|
|
}
|
|
|
|
memcpy (dest, s2, len2);
|
|
memset (&dest[len2], ' ', destlen - len2);
|
|
}
|
|
|
|
|
|
/* Return string with all trailing blanks removed. */
|
|
|
|
void
|
|
string_trim (GFC_INTEGER_4 * len, void ** dest, GFC_INTEGER_4 slen,
|
|
const char * src)
|
|
{
|
|
int i;
|
|
|
|
/* Determine length of result string. */
|
|
for (i = slen - 1; i >= 0; i--)
|
|
{
|
|
if (src[i] != ' ')
|
|
break;
|
|
}
|
|
*len = i + 1;
|
|
|
|
if (*len > 0)
|
|
{
|
|
/* Allocate space for result string. */
|
|
*dest = internal_malloc_size (*len);
|
|
|
|
/* copy string if necessary. */
|
|
memmove (*dest, src, *len);
|
|
}
|
|
}
|
|
|
|
|
|
/* The length of a string not including trailing blanks. */
|
|
|
|
GFC_INTEGER_4
|
|
string_len_trim (GFC_INTEGER_4 len, const char * s)
|
|
{
|
|
int i;
|
|
|
|
for (i = len - 1; i >= 0; i--)
|
|
{
|
|
if (s[i] != ' ')
|
|
break;
|
|
}
|
|
return i + 1;
|
|
}
|
|
|
|
|
|
/* Find a substring within a string. */
|
|
|
|
GFC_INTEGER_4
|
|
string_index (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 sslen,
|
|
const char * sstr, GFC_LOGICAL_4 back)
|
|
{
|
|
int start;
|
|
int last;
|
|
int i;
|
|
int delta;
|
|
|
|
if (sslen == 0)
|
|
return 1;
|
|
|
|
if (sslen > slen)
|
|
return 0;
|
|
|
|
if (!back)
|
|
{
|
|
last = slen + 1 - sslen;
|
|
start = 0;
|
|
delta = 1;
|
|
}
|
|
else
|
|
{
|
|
last = -1;
|
|
start = slen - sslen;
|
|
delta = -1;
|
|
}
|
|
i = 0;
|
|
for (; start != last; start+= delta)
|
|
{
|
|
for (i = 0; i < sslen; i++)
|
|
{
|
|
if (str[start + i] != sstr[i])
|
|
break;
|
|
}
|
|
if (i == sslen)
|
|
return (start + 1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Remove leading blanks from a string, padding at end. The src and dest
|
|
should not overlap. */
|
|
|
|
void
|
|
adjustl (char *dest, GFC_INTEGER_4 len, const char *src)
|
|
{
|
|
int i;
|
|
|
|
i = 0;
|
|
while (i<len && src[i] == ' ')
|
|
i++;
|
|
|
|
if (i < len)
|
|
memcpy (dest, &src[i], len - i);
|
|
if (i > 0)
|
|
memset (&dest[len - i], ' ', i);
|
|
}
|
|
|
|
|
|
/* Remove trailing blanks from a string. */
|
|
|
|
void
|
|
adjustr (char *dest, GFC_INTEGER_4 len, const char *src)
|
|
{
|
|
int i;
|
|
|
|
i = len;
|
|
while (i > 0 && src[i - 1] == ' ')
|
|
i--;
|
|
|
|
if (i < len)
|
|
memset (dest, ' ', len - i);
|
|
memcpy (dest + (len - i), src, i );
|
|
}
|
|
|
|
|
|
/* Scan a string for any one of the characters in a set of characters. */
|
|
|
|
GFC_INTEGER_4
|
|
string_scan (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 setlen,
|
|
const char * set, GFC_LOGICAL_4 back)
|
|
{
|
|
int i, j;
|
|
|
|
if (slen == 0 || setlen == 0)
|
|
return 0;
|
|
|
|
if (back)
|
|
{
|
|
for (i = slen - 1; i >= 0; i--)
|
|
{
|
|
for (j = 0; j < setlen; j++)
|
|
{
|
|
if (str[i] == set[j])
|
|
return (i + 1);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
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 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,
|
|
const char * set, GFC_LOGICAL_4 back)
|
|
{
|
|
int start;
|
|
int last;
|
|
int i;
|
|
int delta;
|
|
|
|
if (slen == 0)
|
|
return 0;
|
|
|
|
if (back)
|
|
{
|
|
last = -1;
|
|
start = slen - 1;
|
|
delta = -1;
|
|
}
|
|
else
|
|
{
|
|
last = slen;
|
|
start = 0;
|
|
delta = 1;
|
|
}
|
|
for (; start != last; start += delta)
|
|
{
|
|
for (i = 0; i < setlen; i++)
|
|
{
|
|
if (str[start] == set[i])
|
|
break;
|
|
}
|
|
if (i == setlen)
|
|
return (start + 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Concatenate several copies of a string. */
|
|
|
|
void
|
|
string_repeat (char * dest, GFC_INTEGER_4 slen,
|
|
const char * src, GFC_INTEGER_4 ncopies)
|
|
{
|
|
int i;
|
|
|
|
/* See if ncopies is valid. */
|
|
if (ncopies < 0)
|
|
{
|
|
/* The error is already reported. */
|
|
runtime_error ("Augument NCOPIES is negative.");
|
|
}
|
|
|
|
/* Copy characters. */
|
|
for (i = 0; i < ncopies; i++)
|
|
{
|
|
memmove (dest + (i * slen), src, slen);
|
|
}
|
|
}
|