[846746e] | 1 | /* OS dependent filename manipulation routines |
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[dc533fe] | 2 | * Copyright (c) Olly Betts 1998-2003,2004,2005,2010,2011,2014 |
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[846746e] | 3 | * |
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[89231c4] | 4 | * This program is free software; you can redistribute it and/or modify |
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| 5 | * it under the terms of the GNU General Public License as published by |
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| 6 | * the Free Software Foundation; either version 2 of the License, or |
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| 7 | * (at your option) any later version. |
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[846746e] | 8 | * |
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| 9 | * This program is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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[89231c4] | 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | * GNU General Public License for more details. |
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[846746e] | 13 | * |
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[89231c4] | 14 | * You should have received a copy of the GNU General Public License |
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| 15 | * along with this program; if not, write to the Free Software |
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[ecbc6c18] | 16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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[846746e] | 17 | */ |
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[6ba8d69] | 18 | |
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[4c83f84] | 19 | #include <config.h> |
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[a420b49] | 20 | |
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[9af1d7a] | 21 | #include "filename.h" |
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[13a1bd16] | 22 | #include "debug.h" |
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[b3b0900] | 23 | #include "osalloc.h" |
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[c606770] | 24 | #include "whichos.h" |
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[47c7a94] | 25 | |
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| 26 | #include <ctype.h> |
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[9af1d7a] | 27 | #include <string.h> |
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| 28 | |
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[908298d] | 29 | typedef struct filelist { |
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| 30 | char *fnm; |
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| 31 | FILE *fh; |
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| 32 | struct filelist *next; |
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| 33 | } filelist; |
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| 34 | |
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| 35 | static filelist *flhead = NULL; |
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| 36 | |
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| 37 | static void filename_register_output_with_fh(const char *fnm, FILE *fh); |
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| 38 | |
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[c606770] | 39 | /* fDirectory( fnm ) returns true if fnm is a directory; false if fnm is a |
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| 40 | * file, doesn't exist, or another error occurs (eg disc not in drive, ...) |
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| 41 | * NB If fnm has a trailing directory separator (e.g. “/” or “/home/olly/” |
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| 42 | * then it's assumed to be a directory even if it doesn't exist (as is an |
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| 43 | * empty string). |
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| 44 | */ |
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| 45 | |
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| 46 | #if OS_UNIX || OS_WIN32 |
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| 47 | |
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| 48 | # include <sys/types.h> |
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| 49 | # include <sys/stat.h> |
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| 50 | # include <stdio.h> |
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| 51 | |
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| 52 | bool |
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| 53 | fDirectory(const char *fnm) |
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| 54 | { |
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| 55 | struct stat buf; |
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| 56 | if (!fnm[0] || fnm[strlen(fnm) - 1] == FNM_SEP_LEV |
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| 57 | #ifdef FNM_SEP_LEV2 |
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| 58 | || fnm[strlen(fnm) - 1] == FNM_SEP_LEV2 |
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| 59 | #endif |
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| 60 | ) return 1; |
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| 61 | if (stat(fnm, &buf) != 0) return 0; |
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| 62 | #ifdef S_ISDIR |
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| 63 | /* POSIX way */ |
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| 64 | return S_ISDIR(buf.st_mode); |
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| 65 | #else |
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| 66 | /* BSD way */ |
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| 67 | return ((buf.st_mode & S_IFMT) == S_IFDIR); |
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| 68 | #endif |
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| 69 | } |
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| 70 | |
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| 71 | #else |
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| 72 | # error Unknown OS |
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| 73 | #endif |
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| 74 | |
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[a0b076f] | 75 | /* safe_fopen should be used when writing a file |
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| 76 | * fopenWithPthAndExt should be used when reading a file |
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| 77 | */ |
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[ce5b43c] | 78 | |
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[a420b49] | 79 | /* Wrapper for fopen which throws a fatal error if it fails. |
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| 80 | * Some versions of fopen() are quite happy to open a directory. |
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| 81 | * We aren't, so catch this case. */ |
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| 82 | extern FILE * |
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| 83 | safe_fopen(const char *fnm, const char *mode) |
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| 84 | { |
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| 85 | FILE *f; |
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[4c07c51] | 86 | SVX_ASSERT(mode[0] == 'w'); /* only expect to be used for writing */ |
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[a420b49] | 87 | if (fDirectory(fnm)) |
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[0804fbe] | 88 | fatalerror(/*Filename “%s” refers to directory*/44, fnm); |
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[a420b49] | 89 | |
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| 90 | f = fopen(fnm, mode); |
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[0804fbe] | 91 | if (!f) fatalerror(/*Failed to open output file “%s”*/47, fnm); |
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[a0b076f] | 92 | |
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[908298d] | 93 | filename_register_output_with_fh(fnm, f); |
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[a420b49] | 94 | return f; |
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| 95 | } |
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| 96 | |
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[f1067a2] | 97 | /* Wrapper for fclose which throws a fatal error if there's been a write |
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| 98 | * error. |
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| 99 | */ |
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| 100 | extern void |
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| 101 | safe_fclose(FILE *f) |
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| 102 | { |
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[4c07c51] | 103 | SVX_ASSERT(f); |
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[f1067a2] | 104 | /* NB: use of | rather than || - we always want to call fclose() */ |
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[908298d] | 105 | if (ferror(f) | (fclose(f) == EOF)) { |
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| 106 | filelist *p; |
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| 107 | for (p = flhead; p != NULL; p = p->next) |
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| 108 | if (p->fh == f) break; |
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| 109 | |
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| 110 | if (p && p->fnm) { |
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| 111 | const char *fnm = p->fnm; |
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| 112 | p->fnm = NULL; |
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| 113 | p->fh = NULL; |
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| 114 | (void)remove(fnm); |
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[0804fbe] | 115 | fatalerror(/*Error writing to file “%s”*/110, fnm); |
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[908298d] | 116 | } |
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[dc533fe] | 117 | /* f wasn't opened with safe_fopen(), so we don't know the filename. */ |
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[f1067a2] | 118 | fatalerror(/*Error writing to file*/111); |
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[908298d] | 119 | } |
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[f1067a2] | 120 | } |
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| 121 | |
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[ce5b43c] | 122 | extern FILE * |
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| 123 | safe_fopen_with_ext(const char *fnm, const char *ext, const char *mode) |
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| 124 | { |
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| 125 | FILE *f; |
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| 126 | char *p; |
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| 127 | p = add_ext(fnm, ext); |
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| 128 | f = safe_fopen(p, mode); |
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| 129 | osfree(p); |
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| 130 | return f; |
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| 131 | } |
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| 132 | |
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| 133 | static FILE * |
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[a420b49] | 134 | fopen_not_dir(const char *fnm, const char *mode) |
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| 135 | { |
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| 136 | if (fDirectory(fnm)) return NULL; |
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| 137 | return fopen(fnm, mode); |
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[9af1d7a] | 138 | } |
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| 139 | |
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[9965b2b] | 140 | extern char * |
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[ce5b43c] | 141 | path_from_fnm(const char *fnm) |
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[a420b49] | 142 | { |
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[9af1d7a] | 143 | char *pth; |
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| 144 | const char *lf; |
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| 145 | int lenpth = 0; |
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| 146 | |
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[a420b49] | 147 | lf = strrchr(fnm, FNM_SEP_LEV); |
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[9af1d7a] | 148 | #ifdef FNM_SEP_LEV2 |
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[029824d] | 149 | { |
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[eee67ab] | 150 | const char *lf2 = strrchr(lf ? lf + 1 : fnm, FNM_SEP_LEV2); |
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[029824d] | 151 | if (lf2) lf = lf2; |
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| 152 | } |
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[9af1d7a] | 153 | #endif |
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| 154 | #ifdef FNM_SEP_DRV |
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[a420b49] | 155 | if (!lf) lf = strrchr(fnm, FNM_SEP_DRV); |
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[9af1d7a] | 156 | #endif |
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| 157 | if (lf) lenpth = lf - fnm + 1; |
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| 158 | |
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[908298d] | 159 | pth = osmalloc(lenpth + 1); |
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[a420b49] | 160 | memcpy(pth, fnm, lenpth); |
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[9af1d7a] | 161 | pth[lenpth] = '\0'; |
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| 162 | |
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| 163 | return pth; |
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| 164 | } |
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| 165 | |
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[ce5b43c] | 166 | extern char * |
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| 167 | base_from_fnm(const char *fnm) |
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| 168 | { |
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| 169 | char *p; |
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[cb3d1e2] | 170 | |
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[ce5b43c] | 171 | p = strrchr(fnm, FNM_SEP_EXT); |
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| 172 | /* Trim off any leaf extension, but dirs can have extensions too */ |
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[029824d] | 173 | if (p && !strchr(p, FNM_SEP_LEV) |
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[ce5b43c] | 174 | #ifdef FNM_SEP_LEV2 |
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[029824d] | 175 | && !strchr(p, FNM_SEP_LEV2) |
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[ce5b43c] | 176 | #endif |
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| 177 | ) { |
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[e917a13] | 178 | size_t len = (const char *)p - fnm; |
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[ce5b43c] | 179 | |
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[908298d] | 180 | p = osmalloc(len + 1); |
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[ce5b43c] | 181 | memcpy(p, fnm, len); |
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| 182 | p[len] = '\0'; |
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| 183 | return p; |
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| 184 | } |
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| 185 | |
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[908298d] | 186 | return osstrdup(fnm); |
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[ce5b43c] | 187 | } |
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| 188 | |
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| 189 | extern char * |
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| 190 | baseleaf_from_fnm(const char *fnm) |
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| 191 | { |
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| 192 | const char *p; |
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| 193 | char *q; |
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| 194 | size_t len; |
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[cb3d1e2] | 195 | |
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[ce5b43c] | 196 | p = fnm; |
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| 197 | q = strrchr(p, FNM_SEP_LEV); |
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| 198 | if (q) p = q + 1; |
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| 199 | #ifdef FNM_SEP_LEV2 |
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| 200 | q = strrchr(p, FNM_SEP_LEV2); |
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| 201 | if (q) p = q + 1; |
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| 202 | #endif |
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[cb3d1e2] | 203 | |
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[ce5b43c] | 204 | q = strrchr(p, FNM_SEP_EXT); |
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[e917a13] | 205 | if (q) len = (const char *)q - p; else len = strlen(p); |
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[ce5b43c] | 206 | |
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[908298d] | 207 | q = osmalloc(len + 1); |
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[ce5b43c] | 208 | memcpy(q, p, len); |
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| 209 | q[len] = '\0'; |
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| 210 | return q; |
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| 211 | } |
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| 212 | |
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[9965b2b] | 213 | extern char * |
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[ce5b43c] | 214 | leaf_from_fnm(const char *fnm) |
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[a420b49] | 215 | { |
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[029824d] | 216 | const char *lf; |
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[a420b49] | 217 | lf = strrchr(fnm, FNM_SEP_LEV); |
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[029824d] | 218 | if (lf) fnm = lf + 1; |
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[9af1d7a] | 219 | #ifdef FNM_SEP_LEV2 |
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[029824d] | 220 | lf = strrchr(fnm, FNM_SEP_LEV2); |
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| 221 | if (lf) fnm = lf + 1; |
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[9af1d7a] | 222 | #endif |
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| 223 | #ifdef FNM_SEP_DRV |
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[029824d] | 224 | lf = strrchr(fnm, FNM_SEP_DRV); |
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| 225 | if (lf) fnm = lf + 1; |
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[9af1d7a] | 226 | #endif |
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[908298d] | 227 | return osstrdup(fnm); |
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[9af1d7a] | 228 | } |
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| 229 | |
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| 230 | /* Make fnm from pth and lf, inserting an FNM_SEP_LEV if appropriate */ |
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[9965b2b] | 231 | extern char * |
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[ce5b43c] | 232 | use_path(const char *pth, const char *lf) |
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[a420b49] | 233 | { |
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[9af1d7a] | 234 | char *fnm; |
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| 235 | int len, len_total; |
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[63d4f07] | 236 | bool fAddSep = false; |
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[9af1d7a] | 237 | |
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| 238 | len = strlen(pth); |
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| 239 | len_total = len + strlen(lf) + 1; |
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| 240 | |
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| 241 | /* if there's a path and it doesn't end in a separator, insert one */ |
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[a420b49] | 242 | if (len && pth[len - 1] != FNM_SEP_LEV) { |
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[9af1d7a] | 243 | #ifdef FNM_SEP_LEV2 |
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[a420b49] | 244 | if (pth[len - 1] != FNM_SEP_LEV2) { |
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[9af1d7a] | 245 | #endif |
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| 246 | #ifdef FNM_SEP_DRV |
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[421b7d2] | 247 | if (pth[len - 1] != FNM_SEP_DRV) { |
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[9af1d7a] | 248 | #endif |
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[63d4f07] | 249 | fAddSep = true; |
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[421b7d2] | 250 | len_total++; |
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[9af1d7a] | 251 | #ifdef FNM_SEP_DRV |
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[421b7d2] | 252 | } |
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[9af1d7a] | 253 | #endif |
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| 254 | #ifdef FNM_SEP_LEV2 |
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| 255 | } |
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| 256 | #endif |
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| 257 | } |
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| 258 | |
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[908298d] | 259 | fnm = osmalloc(len_total); |
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[a420b49] | 260 | strcpy(fnm, pth); |
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[9af1d7a] | 261 | if (fAddSep) fnm[len++] = FNM_SEP_LEV; |
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[a420b49] | 262 | strcpy(fnm + len, lf); |
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[9af1d7a] | 263 | return fnm; |
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| 264 | } |
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| 265 | |
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| 266 | /* Add ext to fnm, inserting an FNM_SEP_EXT if appropriate */ |
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[9965b2b] | 267 | extern char * |
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[ce5b43c] | 268 | add_ext(const char *fnm, const char *ext) |
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[a420b49] | 269 | { |
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[9af1d7a] | 270 | char * fnmNew; |
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| 271 | int len, len_total; |
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[63d4f07] | 272 | bool fAddSep = false; |
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[9af1d7a] | 273 | |
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| 274 | len = strlen(fnm); |
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| 275 | len_total = len + strlen(ext) + 1; |
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| 276 | if (ext[0] != FNM_SEP_EXT) { |
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[63d4f07] | 277 | fAddSep = true; |
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[9af1d7a] | 278 | len_total++; |
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| 279 | } |
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| 280 | |
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[908298d] | 281 | fnmNew = osmalloc(len_total); |
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[a420b49] | 282 | strcpy(fnmNew, fnm); |
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[9af1d7a] | 283 | if (fAddSep) fnmNew[len++] = FNM_SEP_EXT; |
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[a420b49] | 284 | strcpy(fnmNew + len, ext); |
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[9af1d7a] | 285 | return fnmNew; |
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| 286 | } |
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| 287 | |
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[c606770] | 288 | #if OS_WIN32 |
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| 289 | |
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| 290 | /* NB "c:fred" isn't relative. Eg "c:\data\c:fred" won't work */ |
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| 291 | static bool |
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| 292 | fAbsoluteFnm(const char *fnm) |
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| 293 | { |
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| 294 | /* <drive letter>: or \<path> or /<path> |
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| 295 | * or \\<host>\... or //<host>/... */ |
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| 296 | unsigned char ch = (unsigned char)*fnm; |
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| 297 | return ch == '/' || ch == '\\' || |
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| 298 | (ch && fnm[1] == ':' && (ch | 32) >= 'a' && (ch | 32) <= 'z'); |
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| 299 | } |
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| 300 | |
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| 301 | #elif OS_UNIX |
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| 302 | |
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| 303 | static bool |
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| 304 | fAbsoluteFnm(const char *fnm) |
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| 305 | { |
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| 306 | return (fnm[0] == '/'); |
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| 307 | } |
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| 308 | |
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| 309 | #endif |
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| 310 | |
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[9af1d7a] | 311 | /* fopen file, found using pth and fnm |
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[25ab06b] | 312 | * fnmUsed is used to return filename used to open file (ignored if NULL) |
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[9af1d7a] | 313 | * or NULL if file didn't open |
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| 314 | */ |
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[9965b2b] | 315 | extern FILE * |
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[25ab06b] | 316 | fopenWithPthAndExt(const char *pth, const char *fnm, const char *ext, |
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| 317 | const char *mode, char **fnmUsed) |
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[a420b49] | 318 | { |
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| 319 | char *fnmFull = NULL; |
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| 320 | FILE *fh = NULL; |
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| 321 | |
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[c606770] | 322 | /* Don't try to use pth if it is unset or empty, or if the filename is |
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| 323 | * already absolute. |
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| 324 | */ |
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| 325 | if (pth == NULL || *pth == '\0' || fAbsoluteFnm(fnm)) { |
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[25ab06b] | 326 | fh = fopen_not_dir(fnm, mode); |
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[a420b49] | 327 | if (fh) { |
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[908298d] | 328 | if (fnmUsed) fnmFull = osstrdup(fnm); |
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[a420b49] | 329 | } else { |
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[25ab06b] | 330 | if (ext && *ext) { |
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[a420b49] | 331 | /* we've been given an extension so try using it */ |
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[25ab06b] | 332 | fnmFull = add_ext(fnm, ext); |
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| 333 | fh = fopen_not_dir(fnmFull, mode); |
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[a420b49] | 334 | } |
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[9af1d7a] | 335 | } |
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[a420b49] | 336 | } else { |
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| 337 | /* try using path given - first of all without the extension */ |
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[ce5b43c] | 338 | fnmFull = use_path(pth, fnm); |
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[25ab06b] | 339 | fh = fopen_not_dir(fnmFull, mode); |
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[a420b49] | 340 | if (!fh) { |
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[25ab06b] | 341 | if (ext && *ext) { |
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[a420b49] | 342 | /* we've been given an extension so try using it */ |
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| 343 | char *fnmTmp; |
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| 344 | fnmTmp = fnmFull; |
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[25ab06b] | 345 | fnmFull = add_ext(fnmFull, ext); |
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[a420b49] | 346 | osfree(fnmTmp); |
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[25ab06b] | 347 | fh = fopen_not_dir(fnmFull, mode); |
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[a420b49] | 348 | } |
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[9af1d7a] | 349 | } |
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[a420b49] | 350 | } |
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| 351 | |
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| 352 | /* either it opened or didn't. If not, fh == NULL from fopen_not_dir() */ |
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| 353 | |
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| 354 | /* free name if it didn't open or name isn't wanted */ |
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[25ab06b] | 355 | if (fh == NULL || fnmUsed == NULL) osfree(fnmFull); |
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| 356 | if (fnmUsed) *fnmUsed = (fh ? fnmFull : NULL); |
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[a420b49] | 357 | return fh; |
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[9af1d7a] | 358 | } |
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[47c7a94] | 359 | |
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| 360 | /* Like fopenWithPthAndExt except that "foreign" paths are translated to |
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| 361 | * native ones (e.g. on Unix dir\file.ext -> dir/file.ext) */ |
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| 362 | FILE * |
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| 363 | fopen_portable(const char *pth, const char *fnm, const char *ext, |
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[25ab06b] | 364 | const char *mode, char **fnmUsed) |
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[47c7a94] | 365 | { |
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[25ab06b] | 366 | FILE *fh = fopenWithPthAndExt(pth, fnm, ext, mode, fnmUsed); |
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[47c7a94] | 367 | if (fh == NULL) { |
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[affaeee] | 368 | #if OS_UNIX |
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[0c62a67] | 369 | bool changed = false; |
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| 370 | char *fnm_trans = osstrdup(fnm); |
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| 371 | for (char *p = fnm_trans; *p; p++) { |
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[47c7a94] | 372 | switch (*p) { |
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[421b7d2] | 373 | case '\\': /* swap a backslash to a forward slash */ |
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[47c7a94] | 374 | *p = '/'; |
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[0c62a67] | 375 | changed = true; |
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[47c7a94] | 376 | break; |
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| 377 | } |
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| 378 | } |
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[0c62a67] | 379 | if (changed) |
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[25ab06b] | 380 | fh = fopenWithPthAndExt(pth, fnm_trans, ext, mode, fnmUsed); |
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[47c7a94] | 381 | |
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[0c62a67] | 382 | /* To help users process data that originated on a case-insensitive |
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| 383 | * filing system, try lowercasing the filename if not found. |
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| 384 | */ |
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[47c7a94] | 385 | if (fh == NULL) { |
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[0c62a67] | 386 | bool had_lower = false; |
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| 387 | changed = false; |
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| 388 | for (char *p = fnm_trans; *p ; p++) { |
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[0580c6a] | 389 | unsigned char ch = *p; |
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| 390 | if (isupper(ch)) { |
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| 391 | *p = tolower(ch); |
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[0c62a67] | 392 | changed = true; |
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| 393 | } else if (islower(ch)) { |
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| 394 | had_lower = true; |
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[47c7a94] | 395 | } |
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[0580c6a] | 396 | } |
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[0c62a67] | 397 | if (changed) |
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[25ab06b] | 398 | fh = fopenWithPthAndExt(pth, fnm_trans, ext, mode, fnmUsed); |
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[0c62a67] | 399 | |
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| 400 | /* If that fails, try upper casing the initial character of the leaf. */ |
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| 401 | if (fh == NULL) { |
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| 402 | char *leaf = strrchr(fnm_trans, '/'); |
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| 403 | leaf = (leaf ? leaf + 1 : fnm_trans); |
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[8adbe49] | 404 | if (islower((unsigned char)*leaf)) { |
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| 405 | *leaf = toupper((unsigned char)*leaf); |
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[0c62a67] | 406 | fh = fopenWithPthAndExt(pth, fnm_trans, ext, mode, fnmUsed); |
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| 407 | } |
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| 408 | if (fh == NULL && had_lower) { |
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| 409 | /* Finally, try upper casing the filename if it wasn't all |
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| 410 | * upper case to start with. */ |
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| 411 | for (char *p = fnm_trans; *p ; p++) { |
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| 412 | *p = toupper((unsigned char)*p); |
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| 413 | } |
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| 414 | fh = fopenWithPthAndExt(pth, fnm_trans, ext, mode, fnmUsed); |
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| 415 | } |
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| 416 | } |
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[47c7a94] | 417 | } |
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| 418 | osfree(fnm_trans); |
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| 419 | #endif |
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| 420 | } |
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| 421 | return fh; |
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| 422 | } |
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[25ab06b] | 423 | |
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| 424 | void |
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| 425 | filename_register_output(const char *fnm) |
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[421b7d2] | 426 | { |
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[908298d] | 427 | filelist *p = osnew(filelist); |
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[4c07c51] | 428 | SVX_ASSERT(fnm); |
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[908298d] | 429 | p->fnm = osstrdup(fnm); |
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| 430 | p->fh = NULL; |
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| 431 | p->next = flhead; |
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| 432 | flhead = p; |
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| 433 | } |
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| 434 | |
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| 435 | static void |
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| 436 | filename_register_output_with_fh(const char *fnm, FILE *fh) |
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[25ab06b] | 437 | { |
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| 438 | filelist *p = osnew(filelist); |
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[4c07c51] | 439 | SVX_ASSERT(fnm); |
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[908298d] | 440 | p->fnm = osstrdup(fnm); |
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| 441 | p->fh = fh; |
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[25ab06b] | 442 | p->next = flhead; |
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| 443 | flhead = p; |
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| 444 | } |
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| 445 | |
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| 446 | void |
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| 447 | filename_delete_output(void) |
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| 448 | { |
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| 449 | while (flhead) { |
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| 450 | filelist *p = flhead; |
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| 451 | flhead = flhead->next; |
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[908298d] | 452 | if (p->fnm) { |
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| 453 | (void)remove(p->fnm); |
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| 454 | osfree(p->fnm); |
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| 455 | } |
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[25ab06b] | 456 | osfree(p); |
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| 457 | } |
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| 458 | } |
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