1 | /* util.c -- readline utility functions */ |
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2 | |
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3 | /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. |
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4 | |
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5 | This file is part of the GNU Readline Library, a library for |
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6 | reading lines of text with interactive input and history editing. |
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7 | |
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8 | The GNU Readline Library is free software; you can redistribute it |
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9 | and/or modify it under the terms of the GNU General Public License |
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10 | as published by the Free Software Foundation; either version 1, or |
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11 | (at your option) any later version. |
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12 | |
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13 | The GNU Readline Library is distributed in the hope that it will be |
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14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
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15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | GNU General Public License for more details. |
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17 | |
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18 | The GNU General Public License is often shipped with GNU software, and |
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19 | is generally kept in a file called COPYING or LICENSE. If you do not |
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20 | have a copy of the license, write to the Free Software Foundation, |
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21 | 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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22 | #define READLINE_LIBRARY |
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23 | |
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24 | #if defined (HAVE_CONFIG_H) |
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25 | # include <config.h> |
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26 | #endif |
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27 | |
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28 | #include <sys/types.h> |
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29 | #include <fcntl.h> |
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30 | #include "posixjmp.h" |
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31 | |
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32 | #if defined (HAVE_UNISTD_H) |
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33 | # include <unistd.h> /* for _POSIX_VERSION */ |
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34 | #endif /* HAVE_UNISTD_H */ |
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35 | |
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36 | #if defined (HAVE_STDLIB_H) |
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37 | # include <stdlib.h> |
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38 | #else |
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39 | # include "ansi_stdlib.h" |
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40 | #endif /* HAVE_STDLIB_H */ |
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41 | |
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42 | #include <stdio.h> |
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43 | #include <ctype.h> |
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44 | |
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45 | /* System-specific feature definitions and include files. */ |
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46 | #include "rldefs.h" |
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47 | |
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48 | #if defined (TIOCSTAT_IN_SYS_IOCTL) |
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49 | # include <sys/ioctl.h> |
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50 | #endif /* TIOCSTAT_IN_SYS_IOCTL */ |
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51 | |
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52 | /* Some standard library routines. */ |
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53 | #include "readline.h" |
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54 | |
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55 | #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0) |
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56 | |
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57 | /* Pseudo-globals imported from readline.c */ |
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58 | extern int readline_echoing_p; |
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59 | extern procenv_t readline_top_level; |
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60 | extern int rl_line_buffer_len; |
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61 | extern Function *rl_last_func; |
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62 | |
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63 | extern int _rl_defining_kbd_macro; |
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64 | extern char *_rl_executing_macro; |
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65 | |
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66 | /* Pseudo-global functions imported from other library files. */ |
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67 | extern void _rl_replace_text (); |
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68 | extern void _rl_pop_executing_macro (); |
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69 | extern void _rl_set_the_line (); |
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70 | extern void _rl_init_argument (); |
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71 | |
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72 | extern char *xmalloc (), *xrealloc (); |
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73 | |
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74 | /* **************************************************************** */ |
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75 | /* */ |
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76 | /* Utility Functions */ |
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77 | /* */ |
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78 | /* **************************************************************** */ |
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79 | |
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80 | /* Return 0 if C is not a member of the class of characters that belong |
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81 | in words, or 1 if it is. */ |
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82 | |
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83 | int _rl_allow_pathname_alphabetic_chars = 0; |
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84 | static char *pathname_alphabetic_chars = "/-_=~.#$"; |
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85 | |
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86 | int |
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87 | alphabetic (c) |
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88 | int c; |
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89 | { |
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90 | if (ALPHABETIC (c)) |
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91 | return (1); |
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92 | |
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93 | return (_rl_allow_pathname_alphabetic_chars && |
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94 | strchr (pathname_alphabetic_chars, c) != NULL); |
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95 | } |
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96 | |
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97 | /* How to abort things. */ |
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98 | int |
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99 | _rl_abort_internal () |
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100 | { |
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101 | ding (); |
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102 | rl_clear_message (); |
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103 | _rl_init_argument (); |
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104 | rl_pending_input = 0; |
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105 | |
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106 | _rl_defining_kbd_macro = 0; |
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107 | while (_rl_executing_macro) |
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108 | _rl_pop_executing_macro (); |
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109 | |
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110 | rl_last_func = (Function *)NULL; |
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111 | longjmp (readline_top_level, 1); |
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112 | return (0); |
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113 | } |
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114 | |
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115 | int |
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116 | rl_abort (count, key) |
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117 | int count, key; |
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118 | { |
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119 | return (_rl_abort_internal ()); |
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120 | } |
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121 | |
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122 | int |
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123 | rl_tty_status (count, key) |
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124 | int count, key; |
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125 | { |
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126 | #if defined (TIOCSTAT) |
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127 | ioctl (1, TIOCSTAT, (char *)0); |
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128 | rl_refresh_line (count, key); |
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129 | #else |
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130 | ding (); |
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131 | #endif |
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132 | return 0; |
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133 | } |
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134 | |
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135 | /* Return a copy of the string between FROM and TO. |
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136 | FROM is inclusive, TO is not. */ |
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137 | char * |
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138 | rl_copy_text (from, to) |
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139 | int from, to; |
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140 | { |
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141 | register int length; |
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142 | char *copy; |
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143 | |
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144 | /* Fix it if the caller is confused. */ |
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145 | if (from > to) |
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146 | SWAP (from, to); |
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147 | |
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148 | length = to - from; |
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149 | copy = xmalloc (1 + length); |
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150 | strncpy (copy, rl_line_buffer + from, length); |
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151 | copy[length] = '\0'; |
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152 | return (copy); |
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153 | } |
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154 | |
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155 | /* Increase the size of RL_LINE_BUFFER until it has enough space to hold |
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156 | LEN characters. */ |
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157 | void |
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158 | rl_extend_line_buffer (len) |
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159 | int len; |
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160 | { |
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161 | while (len >= rl_line_buffer_len) |
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162 | { |
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163 | rl_line_buffer_len += DEFAULT_BUFFER_SIZE; |
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164 | rl_line_buffer = xrealloc (rl_line_buffer, rl_line_buffer_len); |
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165 | } |
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166 | |
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167 | _rl_set_the_line (); |
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168 | } |
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169 | |
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170 | |
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171 | /* A function for simple tilde expansion. */ |
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172 | int |
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173 | rl_tilde_expand (ignore, key) |
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174 | int ignore, key; |
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175 | { |
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176 | register int start, end; |
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177 | char *homedir, *temp; |
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178 | int len; |
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179 | |
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180 | end = rl_point; |
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181 | start = end - 1; |
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182 | |
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183 | if (rl_point == rl_end && rl_line_buffer[rl_point] == '~') |
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184 | { |
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185 | homedir = tilde_expand ("~"); |
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186 | _rl_replace_text (homedir, start, end); |
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187 | return (0); |
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188 | } |
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189 | else if (rl_line_buffer[start] != '~') |
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190 | { |
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191 | for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--) |
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192 | ; |
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193 | start++; |
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194 | } |
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195 | |
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196 | end = start; |
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197 | do |
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198 | end++; |
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199 | while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end); |
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200 | |
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201 | if (whitespace (rl_line_buffer[end]) || end >= rl_end) |
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202 | end--; |
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203 | |
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204 | /* If the first character of the current word is a tilde, perform |
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205 | tilde expansion and insert the result. If not a tilde, do |
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206 | nothing. */ |
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207 | if (rl_line_buffer[start] == '~') |
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208 | { |
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209 | len = end - start + 1; |
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210 | temp = xmalloc (len + 1); |
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211 | strncpy (temp, rl_line_buffer + start, len); |
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212 | temp[len] = '\0'; |
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213 | homedir = tilde_expand (temp); |
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214 | free (temp); |
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215 | |
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216 | _rl_replace_text (homedir, start, end); |
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217 | } |
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218 | |
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219 | return (0); |
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220 | } |
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221 | |
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222 | /* **************************************************************** */ |
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223 | /* */ |
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224 | /* String Utility Functions */ |
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225 | /* */ |
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226 | /* **************************************************************** */ |
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227 | |
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228 | /* Determine if s2 occurs in s1. If so, return a pointer to the |
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229 | match in s1. The compare is case insensitive. */ |
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230 | char * |
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231 | _rl_strindex (s1, s2) |
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232 | register char *s1, *s2; |
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233 | { |
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234 | register int i, l, len; |
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235 | |
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236 | for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++) |
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237 | if (_rl_strnicmp (s1 + i, s2, l) == 0) |
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238 | return (s1 + i); |
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239 | return ((char *)NULL); |
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240 | } |
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241 | |
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242 | #if !defined (HAVE_STRCASECMP) |
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243 | /* Compare at most COUNT characters from string1 to string2. Case |
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244 | doesn't matter. */ |
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245 | int |
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246 | _rl_strnicmp (string1, string2, count) |
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247 | char *string1, *string2; |
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248 | int count; |
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249 | { |
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250 | register char ch1, ch2; |
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251 | |
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252 | while (count) |
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253 | { |
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254 | ch1 = *string1++; |
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255 | ch2 = *string2++; |
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256 | if (_rl_to_upper(ch1) == _rl_to_upper(ch2)) |
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257 | count--; |
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258 | else |
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259 | break; |
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260 | } |
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261 | return (count); |
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262 | } |
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263 | |
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264 | /* strcmp (), but caseless. */ |
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265 | int |
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266 | _rl_stricmp (string1, string2) |
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267 | char *string1, *string2; |
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268 | { |
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269 | register char ch1, ch2; |
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270 | |
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271 | while (*string1 && *string2) |
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272 | { |
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273 | ch1 = *string1++; |
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274 | ch2 = *string2++; |
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275 | if (_rl_to_upper(ch1) != _rl_to_upper(ch2)) |
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276 | return (1); |
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277 | } |
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278 | return (*string1 - *string2); |
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279 | } |
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280 | #endif /* !HAVE_STRCASECMP */ |
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281 | |
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282 | /* Stupid comparison routine for qsort () ing strings. */ |
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283 | int |
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284 | _rl_qsort_string_compare (s1, s2) |
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285 | char **s1, **s2; |
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286 | { |
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287 | #if defined (HAVE_STRCOLL) |
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288 | return (strcoll (*s1, *s2)); |
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289 | #else |
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290 | int result; |
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291 | |
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292 | result = **s1 - **s2; |
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293 | if (result == 0) |
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294 | result = strcmp (*s1, *s2); |
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295 | |
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296 | return result; |
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297 | #endif |
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298 | } |
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299 | |
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300 | /* Function equivalents for the macros defined in chartypes.h. */ |
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301 | #undef _rl_uppercase_p |
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302 | int |
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303 | _rl_uppercase_p (c) |
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304 | int c; |
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305 | { |
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306 | return (isupper (c)); |
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307 | } |
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308 | |
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309 | #undef _rl_lowercase_p |
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310 | int |
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311 | _rl_lowercase_p (c) |
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312 | int c; |
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313 | { |
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314 | return (islower (c)); |
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315 | } |
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316 | |
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317 | #undef _rl_pure_alphabetic |
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318 | int |
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319 | _rl_pure_alphabetic (c) |
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320 | int c; |
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321 | { |
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322 | return (isupper (c) || islower (c)); |
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323 | } |
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324 | |
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325 | #undef _rl_digit_p |
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326 | int |
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327 | _rl_digit_p (c) |
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328 | int c; |
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329 | { |
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330 | return (isdigit (c)); |
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331 | } |
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332 | |
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333 | #undef _rl_to_lower |
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334 | int |
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335 | _rl_to_lower (c) |
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336 | int c; |
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337 | { |
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338 | return (isupper (c) ? tolower (c) : c); |
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339 | } |
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340 | |
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341 | #undef _rl_to_upper |
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342 | int |
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343 | _rl_to_upper (c) |
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344 | int c; |
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345 | { |
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346 | return (islower (c) ? toupper (c) : c); |
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347 | } |
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348 | |
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349 | #undef _rl_digit_value |
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350 | int |
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351 | _rl_digit_value (c) |
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352 | int c; |
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353 | { |
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354 | return (isdigit (c) ? c - '0' : c); |
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355 | } |
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356 | |
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357 | /* Backwards compatibility, now that savestring has been removed from |
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358 | all `public' readline header files. */ |
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359 | #undef _rl_savestring |
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360 | char * |
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361 | _rl_savestring (s) |
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362 | char *s; |
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363 | { |
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364 | return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s))); |
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365 | } |
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