65 public class Spp {
66 public static void main(String args[]) throws Exception {
67 Map<String, String> vars = new HashMap<String, String>();
68 Set<String> keys = new HashSet<String>();
69 boolean be = false;
70
71 for (String arg:args) {
72 if (arg.startsWith("-D")) {
73 int i = arg.indexOf('=');
74 vars.put(arg.substring(2, i),arg.substring(i+1));
75 } else if (arg.startsWith("-K")) {
76 keys.add(arg.substring(2));
77 } else if ("-be".equals(arg)) {
78 be = true;
79 } else {
80 System.err.println("Usage: java build.tools.spp.Spp [-be] [-Kkey] -Dvar=value ... <in >out");
81 System.exit(-1);
82 }
83 }
84
85 StringBuffer out = new StringBuffer();
86 new Spp().spp(new Scanner(System.in),
87 out, "",
88 keys, vars, be,
89 false);
90 System.out.print(out.toString());
91 }
92
93 static final String LNSEP = System.getProperty("line.separator");
94 static final String KEY = "([a-zA-Z0-9]+)";
95 static final String VAR = "([a-zA-Z0-9_\\-]+)";
96 static final String TEXT = "([a-zA-Z0-9&;,.<>/#() \\$]+)"; // $ -- hack embedded $var$
97
98 static final int GN_NOT = 1;
99 static final int GN_KEY = 2;
100 static final int GN_YES = 3;
101 static final int GN_NO = 5;
102 static final int GN_VAR = 6;
103
104 Matcher ifkey = Pattern.compile("^#if\\[(!)?" + KEY + "\\]").matcher("");
105 Matcher elsekey = Pattern.compile("^#else\\[(!)?" + KEY + "\\]").matcher("");
106 Matcher endkey = Pattern.compile("^#end\\[(!)?" + KEY + "\\]").matcher("");
107 Matcher vardef = Pattern.compile("\\{#if\\[(!)?" + KEY + "\\]\\?" + TEXT + "(:"+ TEXT + ")?\\}|\\$" + VAR + "\\$").matcher("");
108 Matcher vardef2 = Pattern.compile("\\$" + VAR + "\\$").matcher("");
109
110 void append(StringBuffer buf, String ln,
111 Set<String> keys, Map<String, String> vars) {
112 vardef.reset(ln);
113 while (vardef.find()) {
114 String repl = "";
115 if (vardef.group(GN_VAR) != null)
116 repl = vars.get(vardef.group(GN_VAR));
117 else {
118 boolean test = keys.contains(vardef.group(GN_KEY));
119 if (vardef.group(GN_NOT) != null)
120 test = !test;
121 repl = test?vardef.group(GN_YES):vardef.group(GN_NO);
122 if (repl == null)
123 repl = "";
124 else { // embedded $var$
125 while (vardef2.reset(repl).find()) {
126 repl = vardef2.replaceFirst(vars.get(vardef2.group(1)));
127 }
128 }
129 }
130 vardef.appendReplacement(buf, repl);
131 }
132 vardef.appendTail(buf);
133 }
134
135 // return true if #end[key], #end or EOF reached
136 boolean spp(Scanner in, StringBuffer buf, String key,
137 Set<String> keys, Map<String, String> vars,
138 boolean be, boolean skip) {
139 while (in.hasNextLine()) {
140 String ln = in.nextLine();
141 if (be) {
142 if (ln.startsWith("#begin")) {
143 buf.setLength(0); //clean up to this line
144 continue;
145 }
146 if (ln.equals("#end")) {
147 while (in.hasNextLine())
148 in.nextLine();
149 return true; //discard the rest to EOF
150 }
151 }
152 if (ifkey.reset(ln).find()) {
153 String k = ifkey.group(GN_KEY);
154 boolean test = keys.contains(k);
155 if (ifkey.group(GN_NOT) != null)
156 test = !test;
157 buf.append(LNSEP);
158 if (!spp(in, buf, k, keys, vars, be, skip || !test)) {
159 spp(in, buf, k, keys, vars, be, skip || test);
160 }
161 continue;
162 }
163 if (elsekey.reset(ln).find()) {
164 if (!key.equals(elsekey.group(GN_KEY))) {
165 throw new Error("Mis-matched #if-else-end at line <" + ln + ">");
166 }
167 buf.append(LNSEP);
168 return false;
169 }
170 if (endkey.reset(ln).find()) {
171 if (!key.equals(endkey.group(GN_KEY))) {
172 throw new Error("Mis-matched #if-else-end at line <" + ln + ">");
173 }
174 buf.append(LNSEP);
175 return true;
176 }
177 if (ln.startsWith("#warn")) {
178 ln = "// -- This file was mechanically generated: Do not edit! -- //";
179 } else if (ln.trim().startsWith("// ##")) {
180 ln = "";
181 }
182 if (!skip) {
183 append(buf, ln, keys, vars);
184 }
185 buf.append(LNSEP);
186 }
187 return true;
188 }
189 }
|
65 public class Spp {
66 public static void main(String args[]) throws Exception {
67 Map<String, String> vars = new HashMap<String, String>();
68 Set<String> keys = new HashSet<String>();
69 boolean be = false;
70
71 for (String arg:args) {
72 if (arg.startsWith("-D")) {
73 int i = arg.indexOf('=');
74 vars.put(arg.substring(2, i),arg.substring(i+1));
75 } else if (arg.startsWith("-K")) {
76 keys.add(arg.substring(2));
77 } else if ("-be".equals(arg)) {
78 be = true;
79 } else {
80 System.err.println("Usage: java build.tools.spp.Spp [-be] [-Kkey] -Dvar=value ... <in >out");
81 System.exit(-1);
82 }
83 }
84
85 StringBuilder out = new StringBuilder();
86 new Spp().spp(new Scanner(System.in),
87 out, "",
88 keys, vars, be,
89 false);
90 System.out.print(out.toString());
91 }
92
93 static final String LNSEP = System.getProperty("line.separator");
94 static final String TWO_LNSEPS = LNSEP + LNSEP;
95 static final String KEY = "([a-zA-Z0-9]+)";
96 static final String VAR = "([a-zA-Z0-9_\\-]+)";
97 static final String TEXT = "([a-zA-Z0-9&;,.<>/#() \\$]+)"; // $ -- hack embedded $var$
98
99 static final int GN_NOT = 1;
100 static final int GN_KEY = 2;
101 static final int GN_YES = 3;
102 static final int GN_NO = 5;
103 static final int GN_VAR = 6;
104
105 Matcher ifkey = Pattern.compile("^#if\\[(!)?" + KEY + "\\]").matcher("");
106 Matcher elsekey = Pattern.compile("^#else\\[(!)?" + KEY + "\\]").matcher("");
107 Matcher endkey = Pattern.compile("^#end\\[(!)?" + KEY + "\\]").matcher("");
108 Matcher vardef = Pattern.compile("\\{#if\\[(!)?" + KEY + "\\]\\?" + TEXT + "(:"+ TEXT + ")?\\}|\\$" + VAR + "\\$").matcher("");
109 Matcher vardef2 = Pattern.compile("\\$" + VAR + "\\$").matcher("");
110
111 void append(StringBuilder buf, String ln,
112 Set<String> keys, Map<String, String> vars) {
113 vardef.reset(ln);
114 while (vardef.find()) {
115 String repl = "";
116 if (vardef.group(GN_VAR) != null)
117 repl = vars.get(vardef.group(GN_VAR));
118 else {
119 boolean test = keys.contains(vardef.group(GN_KEY));
120 if (vardef.group(GN_NOT) != null)
121 test = !test;
122 repl = test?vardef.group(GN_YES):vardef.group(GN_NO);
123 if (repl == null)
124 repl = "";
125 else { // embedded $var$
126 while (vardef2.reset(repl).find()) {
127 repl = vardef2.replaceFirst(vars.get(vardef2.group(1)));
128 }
129 }
130 }
131 vardef.appendReplacement(buf, repl);
132 }
133 vardef.appendTail(buf);
134 }
135
136 // return true if #end[key], #end or EOF reached
137 boolean spp(Scanner in, StringBuilder buf, String key,
138 Set<String> keys, Map<String, String> vars,
139 boolean be, boolean skip) {
140 while (in.hasNextLine()) {
141 String ln = in.nextLine();
142 if (be) {
143 if (ln.startsWith("#begin")) {
144 buf.setLength(0); //clean up to this line
145 continue;
146 }
147 if (ln.equals("#end")) {
148 while (in.hasNextLine())
149 in.nextLine();
150 return true; //discard the rest to EOF
151 }
152 }
153 if (ifkey.reset(ln).find()) {
154 String k = ifkey.group(GN_KEY);
155 boolean test = keys.contains(k);
156 if (ifkey.group(GN_NOT) != null)
157 test = !test;
158 lineBreak(buf);
159 if (!spp(in, buf, k, keys, vars, be, skip || !test)) {
160 spp(in, buf, k, keys, vars, be, skip || test);
161 }
162 continue;
163 }
164 if (elsekey.reset(ln).find()) {
165 if (!key.equals(elsekey.group(GN_KEY))) {
166 throw new Error("Mis-matched #if-else-end at line <" + ln + ">");
167 }
168 lineBreak(buf);
169 return false;
170 }
171 if (endkey.reset(ln).find()) {
172 if (!key.equals(endkey.group(GN_KEY))) {
173 throw new Error("Mis-matched #if-else-end at line <" + ln + ">");
174 }
175 lineBreak(buf);
176 return true;
177 }
178 if (ln.startsWith("#warn")) {
179 ln = "// -- This file was mechanically generated: Do not edit! -- //";
180 } else if (ln.trim().startsWith("// ##")) {
181 ln = "";
182 }
183 if (!skip) {
184 append(buf, ln, keys, vars);
185 }
186 lineBreak(buf);
187 }
188 return true;
189 }
190
191 // Avoid printing more than two linebreaks in a row, to prevent generating test files
192 // with hundreds of consecutive blank lines.
193 private void lineBreak(StringBuilder buf) {
194 if (buf.length() < TWO_LNSEPS.length()
195 || !buf.substring(buf.length() - TWO_LNSEPS.length()).equals(TWO_LNSEPS)) {
196 buf.append(LNSEP);
197 }
198 }
199 }
|