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annotate src/create_cmdidxs.vim @ 29102:fd9006d6ddcf v8.2.5072

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patch 8.2.5072: using uninitialized value and freed memory in spell command Commit: https://github.com/vim/vim/commit/2813f38e021c6e6581c0c88fcf107e41788bc835 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 9 19:54:24 2022 +0100 patch 8.2.5072: using uninitialized value and freed memory in spell command Problem: Using uninitialized value and freed memory in spell command. Solution: Initialize "attr". Check for empty line early.
author Bram Moolenaar <Bram@vim.org>
date Thu, 09 Jun 2022 21:00:04 +0200
parents 72ce5ca82a75
children
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1 " This script generates the tables cmdidxs1[] and cmdidxs2[][] which,
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2 " given a Ex command, determine the first value to probe to find
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3 " a matching command in cmdnames[] based on the first character
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4 " and the first 2 characters of the command.
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5 " This is used to speed up lookup in cmdnames[].
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6 "
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7 " Script should be run every time new Ex commands are added in Vim,
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8 " from the src/vim directory, since it reads commands from "ex_cmds.h".
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9
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10 let cmds = []
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11 let skipped_cmds = 0
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12
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13 let lines = readfile('ex_cmds.h')
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14 let idx = 0
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15 while idx < len(lines)
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16 let line = lines[idx]
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17 if line =~ '^EXCMD(CMD_'
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18 let m = matchlist(line, '^EXCMD(CMD_\S*,\s*"\([a-z][^"]*\)"')
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19 if len(m) >= 2
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20 let cmds += [ m[1] ]
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21 else
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22 let skipped_cmds += 1
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23 endif
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24
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25 let idx += 1
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26 let flags = lines[idx]
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27 let idx += 1
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28 let addr_type = lines[idx]
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29
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30 if flags =~ '\<EX_RANGE\>'
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31 if addr_type =~ 'ADDR_NONE'
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32 echoerr 'ex_cmds.h:' .. (idx - 1) .. ': Using EX_RANGE with ADDR_NONE: ' .. line
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33 endif
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34 else
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35 if addr_type !~ 'ADDR_NONE'
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36 echoerr 'ex_cmds.h:' .. (idx - 1) .. ': Missing ADDR_NONE: ' .. line
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37 endif
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38 endif
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39
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40 if flags =~ '\<EX_DFLALL\>' && (addr_type =~ 'ADDR_OTHER' || addr_type =~ 'ADDR_NONE')
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41 echoerr 'ex_cmds.h:' .. (idx - 1) .. ': Missing misplaced EX_DFLALL: ' .. line
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42 endif
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43 endif
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44 let idx += 1
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45 endwhile
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46
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47 let cmdidxs1 = {}
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48 let cmdidxs2 = {}
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49
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50 for i in range(len(cmds) - 1, 0, -1)
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51 let cmd = cmds[i]
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52 let c1 = cmd[0] " First character of command
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53 let c2 = cmd[1] " Second character of command (if any)
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54
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55 let cmdidxs1{c1} = i
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56 if c2 >= 'a' && c2 <= 'z'
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57 let cmdidxs2{c1}{c2} = i
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58 endif
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59 endfor
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60
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61 let output = [ '/* Automatically generated code by create_cmdidxs.vim' ]
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62 let output += [ ' *' ]
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63 let output += [ ' * Table giving the index of the first command in cmdnames[] to lookup' ]
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64 let output += [ ' * based on the first letter of a command.' ]
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65 let output += [ ' */' ]
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66 let output += [ 'static const unsigned short cmdidxs1[26] =' ]
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67 let output += [ '{' ]
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68
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69 let a_to_z = map(range(char2nr('a'), char2nr('z')), 'nr2char(v:val)')
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70 for c1 in a_to_z
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71 let line = ' /* ' . c1 . ' */ ' . cmdidxs1{c1} . ((c1 == 'z') ? '' : ',')
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72 let output += [ line ]
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73 endfor
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74 let output += [ '};' ]
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75 let output += [ '' ]
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76 let output += [ '/*' ]
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77 let output += [ ' * Table giving the index of the first command in cmdnames[] to lookup' ]
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78 let output += [ ' * based on the first 2 letters of a command.' ]
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79 let output += [ ' * Values in cmdidxs2[c1][c2] are relative to cmdidxs1[c1] so that they' ]
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80 let output += [ ' * fit in a byte.' ]
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81 let output += [ ' */' ]
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82 let output += [ 'static const unsigned char cmdidxs2[26][26] =' ]
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83 let output += [ '{ /* a b c d e f g h i j k l m n o p q r s t u v w x y z */' ]
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84
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85 for c1 in a_to_z
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86 let line = ' /* ' . c1 . ' */ {'
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87 for c2 in a_to_z
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88 if exists('cmdidxs2{c1}{c2}')
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89 let line .= printf('%3d', cmdidxs2{c1}{c2} - cmdidxs1{c1})
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90 else
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91 let line .= ' 0'
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92 endif
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93 let line .= (c2 == 'z') ? '' : ','
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94 endfor
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95 let line .= ' }' . ((c1 == 'z') ? '' : ',')
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96 let output += [ line ]
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97 endfor
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98
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99 let output += [ '};' ]
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100 let output += [ '' ]
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101 let output += [ 'static const int command_count = ' . (len(cmds) + skipped_cmds) . ';' ]
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102
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103 call writefile(output, "ex_cmdidxs.h")
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104 quit