Mercurial > hg > octave-nkf
annotate src/toplev.h @ 7734:2dee19385d32
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author | John W. Eaton <jwe@octave.org> |
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date | Fri, 25 Apr 2008 12:16:42 -0400 |
parents | bb614b3883a9 |
children | a059b5679fbb |
rev | line source |
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1 | 1 /* |
2 | |
7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, |
4 2003, 2004, 2005, 2006, 2007 John W. Eaton | |
1 | 5 |
6 This file is part of Octave. | |
7 | |
8 Octave is free software; you can redistribute it and/or modify it | |
9 under the terms of the GNU General Public License as published by the | |
7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
11 option) any later version. | |
1 | 12 |
13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
7016 | 19 along with Octave; see the file COPYING. If not, see |
20 <http://www.gnu.org/licenses/>. | |
1 | 21 |
22 */ | |
23 | |
1670 | 24 #if !defined (octave_toplev_h) |
25 #define octave_toplev_h 1 | |
1 | 26 |
1355 | 27 #include <cstdio> |
1 | 28 |
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29 #include <deque> |
3503 | 30 #include <string> |
31 | |
2086 | 32 class octave_value; |
2796 | 33 class octave_value_list; |
5743 | 34 class octave_function; |
5744 | 35 class octave_user_script; |
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36 class tree_statement; |
578 | 37 class tree_statement_list; |
1572 | 38 class charMatrix; |
1 | 39 |
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40 #include "oct-map.h" |
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41 |
7250 | 42 extern OCTINTERP_API void |
2796 | 43 clean_up_and_exit (int) GCC_ATTR_NORETURN; |
574 | 44 |
7250 | 45 extern OCTINTERP_API void recover_from_exception (void); |
7202 | 46 |
5189 | 47 extern int main_loop (void); |
1907 | 48 |
7250 | 49 extern OCTINTERP_API void |
2796 | 50 do_octave_atexit (void); |
2077 | 51 |
7409 | 52 extern OCTINTERP_API void |
53 octave_add_atexit_function (const std::string& fname); | |
54 | |
55 extern OCTINTERP_API bool | |
56 octave_remove_atexit_function (const std::string& fname); | |
57 | |
1 | 58 // Current command to execute. |
7250 | 59 extern OCTINTERP_API tree_statement_list *global_command; |
1 | 60 |
4238 | 61 // Pointer to parent function that is currently being evaluated. |
7250 | 62 extern OCTINTERP_API octave_function *curr_parent_function; |
4238 | 63 |
4217 | 64 // TRUE means we are ready to interpret commands, but not everything |
65 // is ready for interactive use. | |
7185 | 66 extern OCTINTERP_API bool octave_interpreter_ready; |
4217 | 67 |
4172 | 68 // TRUE means we've processed all the init code and we are good to go. |
7185 | 69 extern OCTINTERP_API bool octave_initialized; |
4172 | 70 |
5743 | 71 class |
72 octave_call_stack | |
73 { | |
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74 private: |
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75 |
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76 struct call_stack_elt |
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77 { |
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78 call_stack_elt (octave_function *f) : fcn (f), stmt (0) { } |
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79 |
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80 octave_function *fcn; |
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81 tree_statement *stmt; |
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82 }; |
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83 |
5743 | 84 protected: |
85 | |
86 octave_call_stack (void) : cs () { } | |
87 | |
88 public: | |
89 | |
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90 typedef std::deque<call_stack_elt>::iterator iterator; |
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91 typedef std::deque<call_stack_elt>::const_iterator const_iterator; |
5743 | 92 |
93 static bool instance_ok (void) | |
94 { | |
95 bool retval = true; | |
96 | |
97 if (! instance) | |
98 instance = new octave_call_stack (); | |
99 | |
100 if (! instance) | |
101 { | |
102 ::error ("unable to create call stack object!"); | |
103 | |
104 retval = false; | |
105 } | |
106 | |
107 return retval; | |
108 } | |
109 | |
110 // Current function (top of stack). | |
5744 | 111 static octave_function *current (void) { return top (); } |
5743 | 112 |
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113 // Current statement (top of stack). |
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114 static tree_statement *current_statement (void) { return top_statement (); } |
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115 |
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116 // Current line in current function. |
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117 static int current_line (void) |
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118 { |
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119 return instance_ok () ? instance->do_current_line () : 0; |
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120 } |
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121 |
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122 // Current column in current function. |
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123 static int current_column (void) |
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124 { |
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125 return instance_ok () ? instance->do_current_column () : 0; |
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126 } |
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127 |
5743 | 128 // Caller function, may be built-in. |
129 static octave_function *caller (void) | |
130 { | |
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131 return element (1); |
5743 | 132 } |
133 | |
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134 // Function at location N on the call stack (N == 0 is current), may |
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135 // be built-in. |
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136 static octave_function *element (size_t n) |
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137 { |
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138 return instance_ok () ? instance->do_element (n) : 0; |
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139 } |
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140 |
5744 | 141 // First script on the stack. |
142 static octave_user_script *caller_script (void) | |
5743 | 143 { |
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144 return instance_ok () ? instance->do_caller_user_script () : 0; |
5744 | 145 } |
146 | |
147 // First user-defined function on the stack. | |
148 static octave_user_function *caller_user_function (void) | |
149 { | |
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150 return instance_ok () ? instance->do_caller_user_function () : 0; |
5744 | 151 } |
152 | |
153 // First user-defined function on the stack. | |
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154 static octave_user_code *caller_user_code (void) |
5744 | 155 { |
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156 return instance_ok () ? instance->do_caller_user_code () : 0; |
5743 | 157 } |
158 | |
159 static void push (octave_function *f) | |
160 { | |
161 if (instance_ok ()) | |
162 instance->do_push (f); | |
163 } | |
164 | |
5744 | 165 static octave_function *top (void) |
166 { | |
167 return instance_ok () ? instance->do_top (): 0; | |
168 } | |
169 | |
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170 static tree_statement *top_statement (void) |
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171 { |
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172 return instance_ok () ? instance->do_top_statement (): 0; |
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173 } |
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174 |
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175 static void set_statement (tree_statement *s) |
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176 { |
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177 if (instance_ok ()) |
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178 instance->do_set_statement (s); |
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179 } |
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180 |
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181 static Octave_map backtrace (void) |
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182 { |
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183 return instance_ok () ? instance->do_backtrace () : Octave_map (); |
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184 } |
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185 |
5743 | 186 static void pop (void) |
187 { | |
188 if (instance_ok ()) | |
189 instance->do_pop (); | |
190 } | |
191 | |
192 // A function for popping the top of the call stack that is suitable | |
193 // for use as an unwind_protect handler. | |
194 static void unwind_pop (void *) { pop (); } | |
195 | |
196 static void clear (void) | |
197 { | |
198 if (instance_ok ()) | |
199 instance->do_clear (); | |
200 } | |
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201 |
5743 | 202 private: |
203 | |
204 // The current call stack. | |
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205 std::deque<call_stack_elt> cs; |
5743 | 206 |
207 static octave_call_stack *instance; | |
208 | |
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209 int do_current_line (void) const; |
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210 |
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211 int do_current_column (void) const; |
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212 |
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213 octave_function *do_element (size_t n) |
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214 { |
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215 octave_function *retval = 0; |
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216 |
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217 if (cs.size () > n) |
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218 { |
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219 call_stack_elt& elt = cs[n]; |
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220 retval = elt.fcn; |
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221 } |
5743 | 222 |
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223 return retval; |
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224 } |
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225 |
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226 octave_user_script *do_caller_user_script (void) const; |
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227 |
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228 octave_user_function *do_caller_user_function (void) const; |
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229 |
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230 octave_user_code *do_caller_user_code (void) const; |
5744 | 231 |
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232 void do_push (octave_function *f) |
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233 { |
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234 cs.push_front (call_stack_elt (f)); |
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235 } |
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236 |
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237 octave_function *do_top (void) const |
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238 { |
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239 octave_function *retval = 0; |
5744 | 240 |
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241 if (! cs.empty ()) |
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242 { |
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243 const call_stack_elt& elt = cs.front (); |
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244 retval = elt.fcn; |
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245 } |
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246 |
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247 return retval; |
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248 } |
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249 |
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250 tree_statement *do_top_statement (void) const |
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251 { |
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252 tree_statement *retval = 0; |
5743 | 253 |
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254 if (! cs.empty ()) |
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255 { |
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256 const call_stack_elt& elt = cs.front (); |
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257 retval = elt.stmt; |
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258 } |
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259 |
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260 return retval; |
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261 } |
5743 | 262 |
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263 void do_set_statement (tree_statement *s) |
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264 { |
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265 if (! cs.empty ()) |
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266 { |
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267 call_stack_elt& elt = cs.front (); |
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268 elt.stmt = s; |
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269 } |
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270 } |
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271 |
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272 Octave_map do_backtrace (void) const; |
5744 | 273 |
5743 | 274 void do_pop (void) |
275 { | |
276 if (! cs.empty ()) | |
277 cs.pop_front (); | |
278 } | |
279 | |
280 void do_clear (void) { cs.clear (); } | |
281 }; | |
282 | |
1 | 283 #endif |
284 | |
285 /* | |
286 ;;; Local Variables: *** | |
287 ;;; mode: C++ *** | |
288 ;;; End: *** | |
289 */ |