| /* Copyright (C) 2002-2020 Free Software Foundation, Inc. |
| Contributed by Paul Brook |
| |
| This file is part of the GNU Fortran 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 3, or (at your option) |
| any later version. |
| |
| 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. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "libgfortran.h" |
| #include <string.h> |
| #include <strings.h> |
| |
| |
| /* Given a fortran string, return its length exclusive of the trailing |
| spaces. */ |
| |
| gfc_charlen_type |
| fstrlen (const char *string, gfc_charlen_type len) |
| { |
| for (; len > 0; len--) |
| if (string[len-1] != ' ') |
| break; |
| |
| return len; |
| } |
| |
| |
| /* Copy a Fortran string (not null-terminated, hence length arguments |
| for both source and destination strings. Returns the non-padded |
| length of the destination. */ |
| |
| gfc_charlen_type |
| fstrcpy (char *dest, gfc_charlen_type destlen, |
| const char *src, gfc_charlen_type srclen) |
| { |
| if (srclen >= destlen) |
| { |
| /* This will truncate if too long. */ |
| memcpy (dest, src, destlen); |
| return destlen; |
| } |
| else |
| { |
| memcpy (dest, src, srclen); |
| /* Pad with spaces. */ |
| memset (&dest[srclen], ' ', destlen - srclen); |
| return srclen; |
| } |
| } |
| |
| |
| /* Copy a null-terminated C string to a non-null-terminated Fortran |
| string. Returns the non-padded length of the destination string. */ |
| |
| gfc_charlen_type |
| cf_strcpy (char *dest, gfc_charlen_type dest_len, const char *src) |
| { |
| size_t src_len; |
| |
| src_len = strlen (src); |
| |
| if (src_len >= (size_t) dest_len) |
| { |
| /* This will truncate if too long. */ |
| memcpy (dest, src, dest_len); |
| return dest_len; |
| } |
| else |
| { |
| memcpy (dest, src, src_len); |
| /* Pad with spaces. */ |
| memset (&dest[src_len], ' ', dest_len - src_len); |
| return src_len; |
| } |
| } |
| |
| |
| #ifndef HAVE_STRNLEN |
| static size_t |
| strnlen (const char *s, size_t maxlen) |
| { |
| for (size_t ii = 0; ii < maxlen; ii++) |
| { |
| if (s[ii] == '\0') |
| return ii; |
| } |
| return maxlen; |
| } |
| #endif |
| |
| |
| #ifndef HAVE_STRNDUP |
| static char * |
| strndup (const char *s, size_t n) |
| { |
| size_t len = strnlen (s, n); |
| char *p = malloc (len + 1); |
| if (!p) |
| return NULL; |
| memcpy (p, s, len); |
| p[len] = '\0'; |
| return p; |
| } |
| #endif |
| |
| |
| /* Duplicate a non-null-terminated Fortran string to a malloced |
| null-terminated C string. */ |
| |
| char * |
| fc_strdup (const char *src, gfc_charlen_type src_len) |
| { |
| gfc_charlen_type n = fstrlen (src, src_len); |
| char *p = strndup (src, n); |
| if (!p) |
| os_error ("Memory allocation failed in fc_strdup"); |
| return p; |
| } |
| |
| |
| /* Duplicate a non-null-terminated Fortran string to a malloced |
| null-terminated C string, without getting rid of trailing |
| blanks. */ |
| |
| char * |
| fc_strdup_notrim (const char *src, gfc_charlen_type src_len) |
| { |
| char *p = strndup (src, src_len); |
| if (!p) |
| os_error ("Memory allocation failed in fc_strdup"); |
| return p; |
| } |
| |
| |
| /* Given a fortran string and an array of st_option structures, search through |
| the array to find a match. If the option is not found, we generate an error |
| if no default is provided. */ |
| |
| int |
| find_option (st_parameter_common *cmp, const char *s1, gfc_charlen_type s1_len, |
| const st_option * opts, const char *error_message) |
| { |
| /* Strip trailing blanks from the Fortran string. */ |
| size_t len = (size_t) fstrlen (s1, s1_len); |
| |
| for (; opts->name; opts++) |
| if (len == strlen(opts->name) && strncasecmp (s1, opts->name, len) == 0) |
| return opts->value; |
| |
| generate_error (cmp, LIBERROR_BAD_OPTION, error_message); |
| |
| return -1; |
| } |
| |
| |
| /* gfc_itoa()-- Integer to decimal conversion. |
| The itoa function is a widespread non-standard extension to |
| standard C, often declared in <stdlib.h>. Even though the itoa |
| defined here is a static function we take care not to conflict with |
| any prior non-static declaration. Hence the 'gfc_' prefix, which |
| is normally reserved for functions with external linkage. Notably, |
| in contrast to the *printf() family of functions, this ought to be |
| async-signal-safe. */ |
| |
| const char * |
| gfc_itoa (GFC_INTEGER_LARGEST n, char *buffer, size_t len) |
| { |
| int negative; |
| char *p; |
| GFC_UINTEGER_LARGEST t; |
| |
| if (len < GFC_ITOA_BUF_SIZE) |
| sys_abort (); |
| |
| if (n == 0) |
| return "0"; |
| |
| negative = 0; |
| t = n; |
| if (n < 0) |
| { |
| negative = 1; |
| t = -n; /*must use unsigned to protect from overflow*/ |
| } |
| |
| p = buffer + GFC_ITOA_BUF_SIZE - 1; |
| *p = '\0'; |
| |
| while (t != 0) |
| { |
| *--p = '0' + (t % 10); |
| t /= 10; |
| } |
| |
| if (negative) |
| *--p = '-'; |
| return p; |
| } |