1" This script generates the tables cmdidxs1[] and cmdidxs2[][] which, 2" given a Ex command, determine the first value to probe to find 3" a matching command in cmdnames[] based on the first character 4" and the first 2 characters of the command. 5" This is used to speed up lookup in cmdnames[]. 6" 7" Script should be run every time new Ex commands are added in Vim, 8" from the src/vim directory, since it reads commands from "ex_cmds.h". 9 10let cmds = [] 11let skipped_cmds = 0 12 13for line in readfile('ex_cmds.h') 14 if line =~ '^EX(CMD_' 15 let m = matchlist(line, '^EX(CMD_\S*,\s*"\([a-z][^"]*\)"') 16 if len(m) >= 2 17 let cmds += [ m[1] ] 18 else 19 let skipped_cmds += 1 20 endif 21 endif 22endfor 23 24let cmdidxs1 = {} 25let cmdidxs2 = {} 26 27for i in range(len(cmds) - 1, 0, -1) 28 let cmd = cmds[i] 29 let c1 = cmd[0] " First character of command 30 let c2 = cmd[1] " Second character of command (if any) 31 32 let cmdidxs1{c1} = i 33 if c2 >= 'a' && c2 <= 'z' 34 let cmdidxs2{c1}{c2} = i 35 endif 36endfor 37 38let output = [ '/* Automatically generated code by create_cmdidxs.vim' ] 39let output += [ ' *' ] 40let output += [ ' * Table giving the index of the first command in cmdnames[] to lookup' ] 41let output += [ ' * based on the first letter of a command.' ] 42let output += [ ' */' ] 43let output += [ 'static const unsigned short cmdidxs1[26] =' ] 44let output += [ '{' ] 45 46let a_to_z = map(range(char2nr('a'), char2nr('z')), 'nr2char(v:val)') 47for c1 in a_to_z 48 let line = ' /* ' . c1 . ' */ ' . cmdidxs1{c1} . ((c1 == 'z') ? '' : ',') 49 let output += [ line ] 50endfor 51let output += [ '};' ] 52let output += [ '' ] 53let output += [ '/*' ] 54let output += [ ' * Table giving the index of the first command in cmdnames[] to lookup' ] 55let output += [ ' * based on the first 2 letters of a command.' ] 56let output += [ ' * Values in cmdidxs2[c1][c2] are relative to cmdidxs1[c1] so that they' ] 57let output += [ ' * fit in a byte.' ] 58let output += [ ' */' ] 59let output += [ 'static const unsigned char cmdidxs2[26][26] =' ] 60let 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 */' ] 61 62for c1 in a_to_z 63 let line = ' /* ' . c1 . ' */ {' 64 for c2 in a_to_z 65 if exists('cmdidxs2{c1}{c2}') 66 let line .= printf('%3d', cmdidxs2{c1}{c2} - cmdidxs1{c1}) 67 else 68 let line .= ' 0' 69 endif 70 let line .= (c2 == 'z') ? '' : ',' 71 endfor 72 let line .= ' }' . ((c1 == 'z') ? '' : ',') 73 let output += [ line ] 74endfor 75 76let output += [ '};' ] 77let output += [ '' ] 78let output += [ 'static const int command_count = ' . (len(cmds) + skipped_cmds) . ';' ] 79 80call writefile(output, "ex_cmdidxs.h") 81quit 82