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70
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1 /* Support for Non-ASCII Path Name
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2 Copyright (C) 1985, 1986, 1992, 1993, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.3. Not in FSF. */
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23
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24 /* mcpath.h should be included in config.h */
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25 #include <config.h>
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26 #include "lisp.h"
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27
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28 #include "sysfile.h"
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29 #include "buffer.h"
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30 #include "mule.h"
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31
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32 Lisp_Object Qpathname_coding_system = 0;
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33
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34 static void
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35 mcpath_encode_code (struct Lisp_Coding_System *cp)
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36 {
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37 Lisp_Object coding_system;
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38
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39 coding_system = Fsymbol_value (Qpathname_coding_system);
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40
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41 mule_encode_code (coding_system, cp);
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42 CODE_CNTL (cp) |= CC_END;
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43 }
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44
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45 static int
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46 mule_encode_path_1 (unsigned char *src, unsigned int srcsize,
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47 unsigned char *dst, unsigned int dstsize)
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48 {
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49 struct Lisp_Coding_System code;
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50
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51 mcpath_encode_code (&code);
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52 if (CODE_TYPE (&code) > MULE_AUTOCONV)
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53 {
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54 unsigned char *buf;
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55
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56 /* get_conversion_buffer () is not */
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57 /* re-entrant. */
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58 buf = (unsigned char *) alloca (MULE_ENCODE_BUF_SIZE (srcsize, &code));
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59 if (buf)
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60 {
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61 int len;
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62 Lisp_Object dummy = Qnil;
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63
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64 len = mule_encode (&code, src, buf, srcsize, &dummy);
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65 if (!CODE_CHAR (&code) && len <= dstsize)
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66 {
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67 memcpy (dst, buf, len);
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68 return len;
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69 }
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70 }
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71 }
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72 return -1; /* use original */
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73 }
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74
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75 static unsigned char *
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76 mule_decode_path_1 (unsigned char *src, unsigned char *dst,
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77 unsigned int dstsize)
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78 {
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79 struct Lisp_Coding_System code;
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80
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81 mcpath_encode_code (&code);
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82 if (CODE_TYPE (&code) > MULE_AUTOCONV)
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83 {
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84 int len;
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85 unsigned char *buf;
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86
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87 len = strlen (src) + 1; /* + 1 for '\0' */
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88
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89 /* get_conversion_buffer () is not */
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90 /* re-entrant. */
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91 buf = (unsigned char *) alloca (MULE_DECODE_BUF_SIZE (len, &code));
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92 if (buf)
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93 {
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94 CODE_CNTL (&code) |= CC_END;
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95 len = mule_decode (&code, src, buf, len);
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96 if (!CODE_CHAR (&code) && len <= dstsize)
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97 {
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98 memcpy (dst, buf, len); /* len should include '\0' */
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99 return dst;
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100 }
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101 }
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102 }
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103 return src;
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104 }
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105
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106 static unsigned char *
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107 mule_decode_path (unsigned char *path, unsigned char ext_path[MC_MAXPATHLEN])
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108 {
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109 return
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110 (Qpathname_coding_system
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111 ? mule_decode_path_1 (path, ext_path, MC_MAXPATHLEN)
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112 : path); /* in case of before initialization */
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113 }
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114
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115 static unsigned char *
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116 mule_encode_path (unsigned char *path, unsigned char *encode_buffer,
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117 unsigned int size)
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118 {
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119 int len;
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120
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121 len = mule_encode_path_1 (path, strlen (path), encode_buffer, size);
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122 if (len > 0)
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123 path = encode_buffer;
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124 #ifdef MSDOS
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125 /* convert the MSDOS style path delimiter to the UNIX style. Note
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126 that now the code is *internal*, so we can simply compare each
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127 character with '\\'. And this operation will alter the contents
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128 of Lisp Object, PATH. */
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129 {
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130 unsigned char *p = path;
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131
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132 while (*p)
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133 {
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134 if (*p == '\\')
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135 *p = '/';
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136 p++;
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137 }
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138 }
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139 #endif /* MSDOS */
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140 return path;
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141 }
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142
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143 #if 0 /* example of how they do it (similar junk deleted) ... */
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144
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145 int
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146 mc_creat (unsigned char *path, int mode)
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147 {
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148 unsigned char buffer[MC_MAXPATHLEN];
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149 return creat (mule_decode_path (path, buffer), mode);
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150 }
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151
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152 int
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153 mc_readlink (unsigned char *path, unsigned char *buf, int size)
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154 {
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155 unsigned char buffer[MC_MAXPATHLEN], buffer2[MAXPATHLEN];
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156 int nread;
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157
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158 nread = readlink (mule_decode_path (path, buffer), buffer2, MAXPATHLEN);
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159 if (nread > 0)
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160 {
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161 int len;
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162 unsigned char *p;
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163
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164 len = mule_encode_path_1 (buffer2, nread, buffer, sizeof (buffer));
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165 if (0 <= len && len <= size)
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166 {
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167 memcpy (buf, buffer, len);
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168 return len;
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169 }
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170 }
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171 return -1;
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172 }
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173
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174 int
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175 mc_chdir (unsigned char *path)
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176 {
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177 unsigned char buffer[MC_MAXPATHLEN];
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178
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179 path = mule_decode_path (path, buffer);
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180
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181 #ifdef MSDOS
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182 if ((path[0] != 0) && (path[1] == ':'))
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183 {
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184 int drive = (tolower (path[0]) - 'a');
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185 if (getdisk () != drive)
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186 setdisk (drive);
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187 }
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188
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189 /* If path != "/" and path != "a:/" and path ends with slash, remove
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190 it. */
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191 {
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192 int len = strlen (path);
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193
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194 if (strcmp (path + 1, ":/") && (len > 1) && (path[len - 1] == '/'))
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195 {
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196 if (path != buffer) /* It is not good to modify original path. */
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197 {
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288
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198 memcpy (buffer, path, len - 1); /* no need to copy last /. */
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70
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199 path = buffer;
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200 }
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201 path[len - 1] = 0;
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202 }
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203 }
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204 #endif /* MSDOS */
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205
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206 return chdir (path);
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207 }
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208
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209 #ifdef MSDOS
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210 #ifndef HAVE_GETWD
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211 unsigned char *
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212 mc_getcwd (unsigned char *null, size_t size)
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213 {
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214 unsigned char buffer[MAXPATHLEN];
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215 unsigned char *path;
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216
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217 path = (unsigned char *) getcwd ((char *)buffer, MAXPATHLEN);
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218 if (path)
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219 {
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220 /* here, shoule be (path == buffer). */
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221 path = (unsigned char *) xmalloc (MC_MAXPATHLEN); /* MSDOS */
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222 if (path)
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223 {
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224 int len;
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225 int buffer_length = strlen (buffer) + 1;
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226
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227 len = mule_encode_path_1 (buffer, buffer_length, path, MC_MAXPATHLEN);
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228 if (len < 0)
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229 {
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230 /* conversion failed. use value that is returned from system. */
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231 memcpy (path, buffer, buffer_length);
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232 }
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233 }
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234 }
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235 return path;
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236 }
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237 #else /* HAVE_GETWD */
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238 unsigned char *
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239 mc_getwd (unsigned char path[])
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240 {
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241 unsigned char *p;
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242
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243 p = getwd (path);
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244 if (p)
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245 {
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246 unsigned char buffer[MC_MAXPATHLEN];
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247 int len;
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248
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249 len = mule_encode_path_1 (path, strlen (path) + 1, buffer, sizeof buffer);
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250 if (len > 0)
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251 {
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252 memcpy (path, buffer, len);
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253 }
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254 }
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255 return p;
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256 }
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257 #endif /* HAVE_GETWD */
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258 #endif /* MSDOS */
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259
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260 /* In callproc.c, execvp() is called like this:
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261 * execvp (new_argv[0], new_argv);
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262 * following implement depends this.
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263 */
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264 #ifndef NO_MC_EXECVP
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265 void
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266 mc_execvp (unsigned char *path, unsigned char *argv[])
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267 {
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268 unsigned char buffer[MC_MAXPATHLEN];
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269 argv[0] = path = mule_decode_path (path, buffer);
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270 execvp (path, argv);
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271 }
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272 #endif /* !NO_MC_EXECVP */
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273
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274 static DIRENTRY mcpath_directory_entry;
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275 DIRENTRY *
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276 mc_readdir (DIR *d)
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277 {
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278 SYSTEM_DIRENTRY *sp;
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279 DIRENTRY *dp = &mcpath_directory_entry;
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280
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281 sp = readdir (d);
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282 if (!sp) return 0;
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283
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284 #ifndef MSDOS
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285 dp->d_ino = sp->d_ino;
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286 #endif /* MSDOS */
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287 { /* copy d_name with conversion. */
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288 int len;
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289
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290 len = mule_encode_path_1 (sp->d_name, NAMLEN (sp),
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291 dp->d_name, sizeof (dp->d_name) - 1);
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292 if (len < 0)
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293 {
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294 len = NAMLEN (sp);
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295 #ifdef MCPATH_ASSERT
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296 assert (len < sizeof (dp->d_name));
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297 #endif
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298 memcpy (dp->d_name, sp->d_name, len);
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299 }
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300 dp->d_name[len] = 0;
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301 }
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302 return dp;
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303 }
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304
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305 #endif /* 0 */
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306
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