Annotation of parser3/src/classes/string.C, revision 1.37
1.24 paf 1: /** @file
2: Parser: @b string parser class.
3:
1.4 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.24 paf 5:
1.5 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.4 paf 7:
1.37 ! paf 8: $Id: string.C,v 1.36 2001/04/05 18:22:57 paf Exp $
1.1 paf 9: */
10:
11: #include "pa_request.h"
12: #include "_string.h"
13: #include "pa_vdouble.h"
14: #include "pa_vint.h"
1.17 paf 15: #include "pa_vtable.h"
1.25 paf 16: #include "pa_vbool.h"
1.27 paf 17: #include "pa_string.h"
1.1 paf 18:
19: // global var
20:
1.10 paf 21: VStateless_class *string_class;
1.1 paf 22:
23: // methods
24:
1.7 paf 25: static void _length(Request& r, const String&, Array *) {
1.1 paf 26: Pool& pool=r.pool();
1.15 paf 27: Value& value=*new(pool) VDouble(pool, r.self->get_string()->size());
1.11 paf 28: r.write_no_lang(value);
1.1 paf 29: }
30:
1.7 paf 31: static void _int(Request& r, const String&, Array *) {
1.1 paf 32: Pool& pool=r.pool();
1.13 paf 33: Value& value=*new(pool) VInt(pool, (int)r.self->as_double());
1.11 paf 34: r.write_no_lang(value);
1.1 paf 35: }
36:
1.7 paf 37: static void _double(Request& r, const String&, Array *) {
1.1 paf 38: Pool& pool=r.pool();
1.13 paf 39: Value& value=*new(pool) VDouble(pool, r.self->as_double());
1.11 paf 40: r.write_no_lang(value);
1.1 paf 41: }
42:
1.24 paf 43: /// ^string.format{format}
1.18 paf 44: /*not static*/void _string_format(Request& r, const String& method_name, Array *params) {
1.9 paf 45: Pool& pool=r.pool();
46:
47: Value& fmt=*static_cast<Value *>(params->get(0));
1.24 paf 48: // forcing {this param type}
1.36 paf 49: r.fail_if_junction_(false, fmt, method_name, "fmt must be code");
1.9 paf 50:
1.24 paf 51: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
52: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.9 paf 53:
1.12 paf 54: r.write_no_lang(String(pool, buf));
1.9 paf 55: }
1.11 paf 56:
1.18 paf 57: static void _left(Request& r, const String&, Array *params) {
1.15 paf 58: Pool& pool=r.pool();
59:
60: size_t n=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
61:
62: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 63: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 64: }
65:
1.18 paf 66: static void _right(Request& r, const String&, Array *params) {
1.15 paf 67: Pool& pool=r.pool();
68:
69: size_t n=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
70:
71: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 72: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 73: }
74:
1.18 paf 75: static void _mid(Request& r, const String&, Array *params) {
1.15 paf 76: Pool& pool=r.pool();
77:
78: size_t p=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
79: size_t n=(size_t)r.process(*static_cast<Value *>(params->get(1))).as_double();
80:
81: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 82: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 83: }
84:
1.18 paf 85: static void _pos(Request& r, const String& method_name, Array *params) {
1.16 paf 86: Pool& pool=r.pool();
87:
88: Value& substr=*static_cast<Value *>(params->get(0));
1.17 paf 89: // forcing [this param type]
1.36 paf 90: r.fail_if_junction_(true, substr, method_name, "substr must not be code");
1.16 paf 91:
92: const String& string=*static_cast<VString *>(r.self)->get_string();
93: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
94: }
95:
1.19 paf 96: static void split_list(Request& r, const String& method_name, Array *params,
1.23 paf 97: const String& string,
98: Array& result) {
1.17 paf 99: Pool& pool=r.pool();
100:
101: Value& delim_value=*static_cast<Value *>(params->get(0));
102: // forcing [this param type]
1.36 paf 103: r.fail_if_junction_(true, delim_value, method_name, "delimiter must not be code");
1.23 paf 104:
105: string.split(result, 0, delim_value.as_string(), String::UL_CLEAN, -1);
1.19 paf 106: }
107:
108: static void _lsplit(Request& r, const String& method_name, Array *params) {
109: Pool& pool=r.pool();
110: const String& string=*static_cast<VString *>(r.self)->get_string();
111:
1.21 paf 112: Array& row=*new(pool) Array(pool);
113: split_list(r, method_name, params, string, row);
1.19 paf 114:
1.21 paf 115: Table& table=*new(pool) Table(pool, &string,
116: 0/*nameless*/, 1/*row preallocate(and only)*/);
117: table+=&row;
1.19 paf 118:
119: r.write_no_lang(*new(pool) VTable(pool, &table));
120: }
121:
122: static void _rsplit(Request& r, const String& method_name, Array *params) {
123: Pool& pool=r.pool();
124: const String& string=*static_cast<VString *>(r.self)->get_string();
125:
126: Array list(pool);
127: split_list(r, method_name, params, string, list);
128:
1.21 paf 129: Array& row=*new(pool) Array(pool);
130: for(int i=list.size(); --i>=0; )
131: row+=list.get(i);
132:
133: Table& table=*new(pool) Table(pool, &string,
134: 0/*nameless*/, 1/*row preallocate(and only)*/);
135: table+=&row;
1.17 paf 136:
1.19 paf 137: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 138: }
139:
1.33 paf 140: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 141: if(row)
142: table+=row;
1.27 paf 143: }
144:
145: struct Replace_action_info {
1.30 paf 146: Request *request; const String *origin;
1.31 paf 147: const String *src; String *dest;
1.27 paf 148: Value *replacement_code;
1.29 paf 149: const String *post_match;
1.27 paf 150: };
1.33 paf 151: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 152: void *info) {
1.27 paf 153: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 154: if(row) { // begin&middle
155: // piece from last match['start'] to beginning of this match['finish']
156: if(start!=finish)
1.37 ! paf 157: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.30 paf 158: // store found parts in one-record Vtable
1.32 paf 159: if(table.size()) // middle
160: table.put(0, row);
161: else // begin
1.30 paf 162: table+=row;
163: { // execute 'replacement_code' in 'table' context
164: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
165: vtable.set_name(*ai.origin);
166:
167: Junction *junction=ai.replacement_code->get_junction();
1.34 paf 168: junction->rcontext=junction->root=&vtable;
1.30 paf 169: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
170:
1.34 paf 171: /*
1.31 paf 172: ai.dest->APPEND_CONST("(");
1.37 ! paf 173: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 174: ai.dest->APPEND_CONST(")");
1.34 paf 175: */
1.37 ! paf 176: *ai.dest << replaced.as_string();
1.29 paf 177: }
178: ai.post_match=(String *)row->get(2/*post_match*/);
179: } else // end
1.37 ! paf 180: *ai.dest << *ai.post_match;
1.27 paf 181: }
182:
183: /** search/replace
1.32 paf 184: ^string.match[regexp][options]
185: ^string.match[regexp][options]{replacement-code}
1.27 paf 186: */
1.24 paf 187: static void _match(Request& r, const String& method_name, Array *params) {
188: Pool& pool=r.pool();
1.28 paf 189: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 190:
191: Value& regexp=*static_cast<Value *>(params->get(0));
1.32 paf 192: // forcing [this param type]
1.36 paf 193: r.fail_if_junction_(true, regexp, method_name, "regexp must not be code");
1.24 paf 194:
1.26 paf 195: const String *options=0;
196: if(params->size()>1) {
197: Value& value=*static_cast<Value *>(params->get(1));
198: // forcing {this param type}
1.36 paf 199: r.fail_if_junction_(true, value, method_name, "options must not be code");
1.26 paf 200: options=&value.as_string();
201: }
1.24 paf 202:
1.27 paf 203: Value *result;
1.24 paf 204: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 205: Table *table;
1.27 paf 206: if(params->size()<3) { // search
1.28 paf 207: if(src.match(&method_name,
1.32 paf 208: regexp.as_string(), options,
1.27 paf 209: &table,
1.33 paf 210: search_action, 0)) {
1.27 paf 211: // matched
212: if(table->columns()->size()==3 && // just matched[3=pre/match/post], no substrings
213: table->size()==1) // just one row, not /g_lobal search
214: result=new(pool) VBool(pool, true);
215: else // table of pre/match/post+substrings
216: result=new(pool) VTable(pool, table);
217: } else // not matched [not global]
218: result=new(pool) VBool(pool, false);
219: } else { // replace
220: Value& replacement_code=*static_cast<Value *>(params->get(2));
221: // forcing {this param type}
222: r.fail_if_junction_(false, replacement_code,
1.36 paf 223: method_name, "replacement code must be code");
1.24 paf 224:
1.28 paf 225: String& dest=*new(pool) String(pool);
1.27 paf 226: Replace_action_info replace_action_info={
1.30 paf 227: &r, &method_name,
1.31 paf 228: &src, &dest,
1.28 paf 229: &replacement_code,
1.29 paf 230: &src
1.27 paf 231: };
1.28 paf 232: src.match(&method_name,
1.27 paf 233: r.process(regexp).as_string(), options,
234: &table,
1.33 paf 235: replace_action, &replace_action_info);
1.28 paf 236: result=new(pool) VString(dest);
1.27 paf 237: }
1.26 paf 238: result->set_name(method_name);
1.34 paf 239: r.write_assign_lang(*result);
1.24 paf 240: }
241:
1.11 paf 242: // initialize
1.9 paf 243:
1.10 paf 244: void initialize_string_class(Pool& pool, VStateless_class& vclass) {
1.1 paf 245: // ^string.length[]
1.22 paf 246: vclass.add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 247:
1.1 paf 248: // ^string.int[]
1.22 paf 249: vclass.add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 250:
1.1 paf 251: // ^string.double[]
1.22 paf 252: vclass.add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 253:
1.24 paf 254: // ^string.format{format}
1.22 paf 255: vclass.add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 256:
1.15 paf 257: // ^string.left(n)
1.22 paf 258: vclass.add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 259: // ^string.right(n)
1.22 paf 260: vclass.add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 261: // ^string.mid(p;n)
1.22 paf 262: vclass.add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 263:
264: // ^string.pos[substr]
1.22 paf 265: vclass.add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 266:
267: // ^string.lsplit[delim]
1.22 paf 268: vclass.add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 269: // ^string.rsplit[delim]
1.22 paf 270: vclass.add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 271:
1.32 paf 272: // ^string.match[regexp][options]
273: // ^string.match[regexp][options]{replacement-code}
1.28 paf 274: vclass.add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.2 paf 275: }
1.1 paf 276:
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