1 #! /bin/sh |
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2 |
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3 # |
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4 # Copyright 2000-2001 Sun Microsystems, Inc. All Rights Reserved. |
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5 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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6 # |
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7 # This code is free software; you can redistribute it and/or modify it |
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8 # under the terms of the GNU General Public License version 2 only, as |
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9 # published by the Free Software Foundation. Sun designates this |
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10 # particular file as subject to the "Classpath" exception as provided |
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11 # by Sun in the LICENSE file that accompanied this code. |
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12 # |
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13 # This code is distributed in the hope that it will be useful, but WITHOUT |
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14 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 # version 2 for more details (a copy is included in the LICENSE file that |
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17 # accompanied this code). |
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18 # |
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19 # You should have received a copy of the GNU General Public License version |
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20 # 2 along with this work; if not, write to the Free Software Foundation, |
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21 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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22 # |
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23 # Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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24 # CA 95054 USA or visit www.sun.com if you need additional information or |
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25 # have any questions. |
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26 # |
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27 |
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28 # SPP: A simple/sed-based/stream preprocessor |
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29 # Mark Reinhold / mr@sun.com |
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30 # |
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31 # Usage: spp [-be] [-Kkey] -Dvar=value ... <in >out |
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32 # |
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33 # Source-file constructs |
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34 # |
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35 # Meaningful only at beginning of line, works with any number of keys: |
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36 # |
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37 # #if[key] Includes text between #if/#end if -Kkey specified, |
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38 # #else[key] otherwise changes text to blank lines; key test |
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39 # #end[key] may be negated by prefixing !, e.g., #if[!key] |
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40 # |
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41 # #begin If -be is specified then lines up to and including |
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42 # #end #begin, and from #end to EOF, are deleted |
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43 # |
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44 # #warn Changed into warning that file is generated |
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45 # |
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46 # // ## Changed into blank line |
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47 # |
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48 # Meaningful anywhere in line, works only for first two keys: |
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49 # |
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50 # {#if[key]?yes} Expands to yes if -Kkey specified |
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51 # {#if[key]?yes:no} Expands to yes if -Kkey, otherwise no |
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52 # {#if[!key]?yes} Expands to yes if -Kother |
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53 # {#if[!key]?yes:no} Expands to yes if -Kother, otherwise no |
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54 # $var$ Expands to value if -Dvar=value given |
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55 # |
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56 # yes, no must not contain whitespace |
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57 # |
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58 # If the environment variable SED is defined, uses that instead of sed |
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59 # If the environment variable NAWK is defined, uses that instead of awk |
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60 # |
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61 |
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62 SED=${SED:-sed} |
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63 NAWK=${NAWK:-awk} |
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64 |
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65 # Map a string of the form -Dvar=value into an appropriate sed command |
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66 # |
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67 subst() { |
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68 # The first two lines are to avoid the direct use of echo, |
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69 # which does not treat backslashes consistently across platforms |
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70 echo '' \ |
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71 | $SED -e "s.*$*" \ |
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72 | $SED -e 's-D\([a-zA-Z_][-a-zA-Z_]*\)=\(.*\)'"s\\\\\$\\1\\\\\$\2gg" \ |
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73 -e 's-D\([a-zA-Z_][-a-zA-Z_]*\)'"s\\\\\$\\1\\\\\$1gg" \ |
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74 -e 's/ //g' |
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75 } |
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76 |
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77 es= |
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78 be= |
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79 keys= |
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80 key1=_1_ |
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81 key2=_2_ |
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82 while [ $# -gt 0 ]; do |
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83 case "$1" in |
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84 -be) |
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85 be='-e 1,/^#begin$/d -e /^#end$/,$d' |
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86 ;; |
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87 -D*) |
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88 es="$es -e `subst $1`" |
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89 ;; |
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90 -K*) |
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91 nk=`echo $1 | $SED -e 's/-K//'` |
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92 if [ "x$keys" = x ]; then keys="$nk"; else keys="$keys $nk"; fi |
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93 if [ "x$key1" = x_1_ ]; then key1="$nk"; |
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94 elif [ "x$key2" = x_2_ ]; then key2="$nk"; fi |
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95 ;; |
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96 *) |
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97 echo "Usage: $0 [-be] [-Kkey] -Dvar=value ... <in >out" |
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98 exit 1 |
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99 ;; |
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100 esac |
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101 shift |
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102 done |
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103 |
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104 text='[-a-zA-Z0-9&;,.<>/#() ]' |
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105 |
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106 $SED $es \ |
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107 -e 's// /g' \ |
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108 -e "s@^#warn .*@// -- This file was mechanically generated: Do not edit! -- //@" \ |
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109 -e 's-// ##.*$--' $be \ |
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110 -e "s/{#if\[$key1\]?\($text*\):\($text*\)}/\1/g" \ |
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111 -e "s/{#if\[!$key1\]?\($text*\):\($text*\)}/\2/g" \ |
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112 -e "s/{#if\[$key1\]?\($text*\)}/\1/g" \ |
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113 -e "s/{#if\[!$key1\]?\($text*\)}//g" \ |
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114 -e "s/{#if\[$key2\]?\($text*\):\($text*\)}/\1/g" \ |
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115 -e "s/{#if\[!$key2\]?\($text*\):\($text*\)}/\2/g" \ |
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116 -e "s/{#if\[$key2\]?\($text*\)}/\1/g" \ |
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117 -e "s/{#if\[!$key2\]?\($text*\)}//g" \ |
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118 -e "s/{#if\[[a-z]*\]?\($text*\):\($text*\)}/\2/g" \ |
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119 -e "s/{#if\[![a-z]*\]?\($text*\):\($text*\)}/\1/g" \ |
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120 -e "s/{#if\[[a-z]*\]?\($text*\)}//g" \ |
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121 -e "s/{#if\[![a-z]*\]?\($text*\)}/\1/g" \ |
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122 | $NAWK \ |
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123 'function key(s) { |
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124 i = match(s, "[a-zA-Z][a-zA-Z]*\\]"); |
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125 if (i > 0) return substr(s, i, RLENGTH - 1); |
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126 return "XYZZY"; } |
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127 function neg(s) { return match(s, "!") > 0; } |
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128 BEGIN { |
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129 KEYS = "'"$keys"'" |
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130 n = split(KEYS, ks, " *"); |
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131 for (i = 1; i <= n; i++) keys[ks[i]] = 1; |
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132 top = 1; copy[top] = 1 } |
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133 /^#if\[!?[a-zA-Z][a-zA-Z]*\]/ \ |
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134 { k = key($0); |
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135 n = neg($0); |
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136 stack[++top] = k; |
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137 if ((k in keys) == !n) { |
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138 copy[top] = copy[top - 1]; |
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139 } else { |
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140 copy[top] = 0; |
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141 } |
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142 print ""; next } |
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143 /^#else\[!?[a-zA-Z][a-zA-Z]*\]/ \ |
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144 { k = key($0); |
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145 if (stack[top] == k) { |
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146 copy[top] = copy[top - 1] && !copy[top]; |
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147 } else { |
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148 printf "%d: Mismatched #else key\n", NR | "cat 1>&2"; |
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149 exit 11 |
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150 } |
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151 print ""; next } |
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152 /^#end\[!?[a-zA-Z][a-zA-Z]*\]/ \ |
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153 { k = key($0); |
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154 if (stack[top] == k) { |
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155 top--; |
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156 } else { |
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157 printf "%d: Mismatched #end key\n", NR | "cat 1>&2" |
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158 exit 11 |
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159 } |
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160 print ""; next } |
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161 /^#/ { |
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162 printf "%d: Malformed #directive\n", NR | "cat 1>&2" |
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163 exit 11 |
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164 } |
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165 { if (copy[top]) print; else print "" }' |
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