Last change
on this file since 2160 was
2040,
checked in by rgrieder, 16 years ago
|
reverted those svn:eol-style "native" properties: Tomorrow then.
|
File size:
1.4 KB
|
Line | |
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1 | -- mark up comments and strings |
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2 | STR1 = "\001" |
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3 | STR2 = "\002" |
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4 | STR3 = "\003" |
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5 | STR4 = "\004" |
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6 | REM = "\005" |
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7 | ANY = "([\001-\005])" |
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8 | ESC1 = "\006" |
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9 | ESC2 = "\007" |
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10 | |
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11 | MASK = { -- the substitution order is important |
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12 | {ESC1, "\\'"}, |
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13 | {ESC2, '\\"'}, |
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14 | {STR1, "'"}, |
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15 | {STR2, '"'}, |
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16 | {STR3, "%[%["}, |
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17 | {STR4, "%]%]"}, |
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18 | {REM , "%-%-"}, |
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19 | } |
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20 | |
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21 | function mask (s) |
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22 | for i = 1,getn(MASK) do |
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23 | s = gsub(s,MASK[i][2],MASK[i][1]) |
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24 | end |
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25 | return s |
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26 | end |
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27 | |
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28 | function unmask (s) |
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29 | for i = 1,getn(MASK) do |
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30 | s = gsub(s,MASK[i][1],MASK[i][2]) |
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31 | end |
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32 | return s |
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33 | end |
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34 | |
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35 | function clean (s) |
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36 | -- check for compilation error |
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37 | local code = "return function ()\n" .. s .. "\n end" |
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38 | if not dostring(code) then |
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39 | return nil |
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40 | end |
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41 | |
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42 | if flags['C'] then |
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43 | return s |
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44 | end |
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45 | |
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46 | local S = "" -- saved string |
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47 | |
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48 | s = mask(s) |
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49 | |
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50 | -- remove blanks and comments |
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51 | while 1 do |
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52 | local b,e,d = strfind(s,ANY) |
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53 | if b then |
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54 | S = S..strsub(s,1,b-1) |
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55 | s = strsub(s,b+1) |
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56 | if d==STR1 or d==STR2 then |
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57 | e = strfind(s,d) |
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58 | S = S ..d..strsub(s,1,e) |
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59 | s = strsub(s,e+1) |
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60 | elseif d==STR3 then |
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61 | e = strfind(s,STR4) |
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62 | S = S..d..strsub(s,1,e) |
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63 | s = strsub(s,e+1) |
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64 | elseif d==REM then |
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65 | s = gsub(s,"[^\n]*(\n?)","%1",1) |
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66 | end |
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67 | else |
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68 | S = S..s |
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69 | break |
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70 | end |
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71 | end |
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72 | -- eliminate unecessary spaces |
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73 | S = gsub(S,"[ \t]+"," ") |
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74 | S = gsub(S,"[ \t]*\n[ \t]*","\n") |
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75 | S = gsub(S,"\n+","\n") |
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76 | S = unmask(S) |
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77 | return S |
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78 | end |
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79 | |
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