Mercurial > hg > toybox
annotate toys/posix/sed.c @ 700:ad6bff0c9169
Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
author | Rob Landley <rob@landley.net> |
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date | Fri, 16 Nov 2012 15:36:01 -0600 |
parents | 786841fdb1e0 |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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1 /* sed.c - Stream editor. |
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2 * |
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3 * Copyright 2012 Rob Landley <rob@landley.net> |
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4 * |
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5 * See http://opengroup.org/onlinepubs/9699919799/utilities/sed.c |
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6 |
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7 USE_SED(NEWTOY(sed, "irne*", TOYFLAG_BIN)) |
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8 |
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9 config SED |
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10 bool "sed" |
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11 default n |
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12 help |
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13 usage: sed [-irn] {command | [-e command]...} [FILE...] |
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14 |
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15 Stream EDitor, transforms text by appling script of command to each line |
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16 of input. |
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17 |
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18 -e Add expression to the command script (if no -e, use first argument) |
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19 -i Modify file in place |
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20 -n No default output (p commands only) |
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21 -r Use extended regular expression syntex |
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22 */ |
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23 |
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New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
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24 #define FOR_sed |
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25 #include "toys.h" |
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26 #include "lib/xregcomp.h" |
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27 |
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New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
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28 GLOBALS( |
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29 struct arg_list *scripts; |
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30 struct double_list *commands; |
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31 |
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32 void *parsed; |
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33 ) |
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34 |
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35 // Digested version of what sed commands can actually tell use to do. |
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36 |
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37 |
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38 struct sed_command { |
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39 // double_list compatibility (easier to create in-order) |
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40 struct sed_command *next, *prev; |
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41 |
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42 // data string for (saicytb) |
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43 char c, *data; |
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44 // Regexes for s/match/data/ and /begin/,/end/command |
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45 regex_t *match, *begin, *end; |
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46 // For numeric ranges ala 10,20command |
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47 long lstart, lstop; |
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48 // Which match to replace, 0 for all. s and w commands can write to a file |
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49 int which, outfd; |
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50 }; |
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51 |
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52 // Space. Space. Gotta get past space. Spaaaaaaaace! (But not newline.) |
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53 void spaceorb(char **s) |
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54 { |
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55 while (**s == ' ' || **s == '\t') *s++; |
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56 } |
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57 |
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58 void parse_scripts(void) |
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59 { |
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60 struct sed_command *commands = 0; |
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61 struct arg_list *script; |
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62 int which = 0; |
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63 long l; |
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64 |
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65 for (script = TT.scripts; *script; script = script->next) { |
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66 char *str = script->arg, *s; |
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67 struct sed_command *cmd; |
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68 |
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69 which++; |
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70 for (i=1;;) { |
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71 if (!*str) break; |
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72 |
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73 cmd = xzalloc(sizeof(struct sed_command)); |
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74 |
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75 // Identify prefix |
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76 for (;;) { |
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77 long l; |
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78 |
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79 spaceorb(&str); |
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80 if (*str == '$') { |
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81 l = -1; |
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82 str++; |
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83 } else if (isdigit(*str)) l = strtol(str, &str, 10); |
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84 else if (!cmd->lstart) break; |
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85 else goto parse_fail; |
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86 |
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87 spaceorb(&str); |
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88 if (!cmd->lstart) { |
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89 if (!l) goto parse_fail; |
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90 cmd->lstart = l; |
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91 if (*str != ',') break; |
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92 str++; |
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93 continue; |
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94 } |
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95 cmd->lstop = l; |
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96 break; |
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97 } else if (*str == '/') { |
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98 printf("regex\n"); |
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99 } |
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100 l = stridx("{bcdDgGhHlnNpPstwxyrqia= \t#:}", *str); |
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101 if (l == -1) goto parse_fail; |
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102 |
694
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103 |
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104 } |
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105 } |
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106 |
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107 return; |
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108 |
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109 parse_fail: |
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110 error_exit("bad expression %d@%d: %s", which, i, script->arg+i); |
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111 } |
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112 |
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113 void sed_main(void) |
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114 { |
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115 char **files=toys.optargs; |
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116 |
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117 // If no -e, use first argument |
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118 if (!TT.scripts) { |
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119 if (!*files) error_exit("Need script"); |
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120 (TT.scripts=xzalloc(sizeof(struct arg_list)))->arg=*(files++); |
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121 } |
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122 |
231
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123 |
694
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124 { |
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125 struct arg_list *test; |
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126 |
694
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127 for (test = TT.commands; test; test = test->next) |
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128 dprintf(2,"command=%s\n",test->arg); |
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129 while (*files) dprintf(2,"file=%s\n", *(files++)); |
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130 } |
231
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131 } |