Annotation of parser3/src/classes/string.C, revision 1.42
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:
1.42 ! paf 8: $Id: string.C,v 1.41 2001/04/28 08:43:48 paf Exp $
1.1 paf 9: */
10:
1.42 ! paf 11: #include "pa_methoded.h"
1.1 paf 12: #include "pa_request.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:
1.41 paf 19: // defines
1.1 paf 20:
1.41 paf 21: #define STRING_CLASS_NAME "string"
22:
23: // class
24:
25: class MString : public Methoded {
26: public:
27: MString(Pool& pool);
28: bool used_directly() { return false; }
29: };
1.1 paf 30:
31: // methods
32:
1.38 paf 33: static void _length(Request& r, const String&, MethodParams *) {
1.1 paf 34: Pool& pool=r.pool();
1.15 paf 35: Value& value=*new(pool) VDouble(pool, r.self->get_string()->size());
1.11 paf 36: r.write_no_lang(value);
1.1 paf 37: }
38:
1.38 paf 39: static void _int(Request& r, const String&, MethodParams *) {
1.1 paf 40: Pool& pool=r.pool();
1.13 paf 41: Value& value=*new(pool) VInt(pool, (int)r.self->as_double());
1.11 paf 42: r.write_no_lang(value);
1.1 paf 43: }
44:
1.38 paf 45: static void _double(Request& r, const String&, MethodParams *) {
1.1 paf 46: Pool& pool=r.pool();
1.13 paf 47: Value& value=*new(pool) VDouble(pool, r.self->as_double());
1.11 paf 48: r.write_no_lang(value);
1.1 paf 49: }
50:
1.24 paf 51: /// ^string.format{format}
1.38 paf 52: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 53: Pool& pool=r.pool();
54:
1.38 paf 55: Value& fmt=params->get_junction(0, "fmt must be code");
1.9 paf 56:
1.24 paf 57: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
58: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.9 paf 59:
1.12 paf 60: r.write_no_lang(String(pool, buf));
1.9 paf 61: }
1.11 paf 62:
1.38 paf 63: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 64: Pool& pool=r.pool();
65:
1.38 paf 66: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 67:
68: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 69: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 70: }
71:
1.38 paf 72: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 73: Pool& pool=r.pool();
74:
1.38 paf 75: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 76:
77: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 78: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 79: }
80:
1.38 paf 81: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 82: Pool& pool=r.pool();
83:
1.38 paf 84: size_t p=(size_t)r.process(params->get(0)).as_double();
85: size_t n=(size_t)r.process(params->get(1)).as_double();
1.15 paf 86:
87: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 88: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 89: }
90:
1.38 paf 91: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 92: Pool& pool=r.pool();
93:
1.38 paf 94: Value& substr=params->get_no_junction(0, "substr must not be code");
1.16 paf 95:
96: const String& string=*static_cast<VString *>(r.self)->get_string();
97: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
98: }
99:
1.38 paf 100: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 101: const String& string,
102: Array& result) {
1.17 paf 103: Pool& pool=r.pool();
104:
1.38 paf 105: Value& delim_value=params->get_no_junction(0, "delimiter must not be code");
1.23 paf 106:
107: string.split(result, 0, delim_value.as_string(), String::UL_CLEAN, -1);
1.19 paf 108: }
109:
1.38 paf 110: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 111: Pool& pool=r.pool();
112: const String& string=*static_cast<VString *>(r.self)->get_string();
113:
1.21 paf 114: Array& row=*new(pool) Array(pool);
115: split_list(r, method_name, params, string, row);
1.19 paf 116:
1.21 paf 117: Table& table=*new(pool) Table(pool, &string,
118: 0/*nameless*/, 1/*row preallocate(and only)*/);
119: table+=&row;
1.19 paf 120:
121: r.write_no_lang(*new(pool) VTable(pool, &table));
122: }
123:
1.38 paf 124: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 125: Pool& pool=r.pool();
126: const String& string=*static_cast<VString *>(r.self)->get_string();
127:
128: Array list(pool);
129: split_list(r, method_name, params, string, list);
130:
1.21 paf 131: Array& row=*new(pool) Array(pool);
132: for(int i=list.size(); --i>=0; )
133: row+=list.get(i);
134:
135: Table& table=*new(pool) Table(pool, &string,
136: 0/*nameless*/, 1/*row preallocate(and only)*/);
137: table+=&row;
1.17 paf 138:
1.19 paf 139: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 140: }
141:
1.33 paf 142: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 143: if(row)
144: table+=row;
1.27 paf 145: }
146:
1.40 paf 147: /// used by string: _match / replace_action
1.27 paf 148: struct Replace_action_info {
1.30 paf 149: Request *request; const String *origin;
1.31 paf 150: const String *src; String *dest;
1.27 paf 151: Value *replacement_code;
1.29 paf 152: const String *post_match;
1.27 paf 153: };
1.33 paf 154: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 155: void *info) {
1.27 paf 156: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 157: if(row) { // begin&middle
158: // piece from last match['start'] to beginning of this match['finish']
159: if(start!=finish)
1.37 paf 160: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.30 paf 161: // store found parts in one-record Vtable
1.32 paf 162: if(table.size()) // middle
163: table.put(0, row);
164: else // begin
1.30 paf 165: table+=row;
166: { // execute 'replacement_code' in 'table' context
167: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
168: vtable.set_name(*ai.origin);
169:
170: Junction *junction=ai.replacement_code->get_junction();
1.34 paf 171: junction->rcontext=junction->root=&vtable;
1.30 paf 172: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
173:
1.34 paf 174: /*
1.31 paf 175: ai.dest->APPEND_CONST("(");
1.37 paf 176: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 177: ai.dest->APPEND_CONST(")");
1.34 paf 178: */
1.37 paf 179: *ai.dest << replaced.as_string();
1.29 paf 180: }
181: ai.post_match=(String *)row->get(2/*post_match*/);
182: } else // end
1.37 paf 183: *ai.dest << *ai.post_match;
1.27 paf 184: }
185:
186: /** search/replace
1.32 paf 187: ^string.match[regexp][options]
188: ^string.match[regexp][options]{replacement-code}
1.27 paf 189: */
1.38 paf 190: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 191: Pool& pool=r.pool();
1.28 paf 192: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 193:
1.38 paf 194: Value& regexp=params->get_no_junction(0, "regexp must not be code");
195:
196: const String *options=
197: params->size()>1?
198: ¶ms->get_no_junction(1, "options must not be code").as_string():0;
1.24 paf 199:
1.27 paf 200: Value *result;
1.24 paf 201: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 202: Table *table;
1.27 paf 203: if(params->size()<3) { // search
1.39 paf 204: if(src.match(r.pcre_tables,
205: &method_name,
1.32 paf 206: regexp.as_string(), options,
1.27 paf 207: &table,
1.33 paf 208: search_action, 0)) {
1.27 paf 209: // matched
210: if(table->columns()->size()==3 && // just matched[3=pre/match/post], no substrings
211: table->size()==1) // just one row, not /g_lobal search
212: result=new(pool) VBool(pool, true);
213: else // table of pre/match/post+substrings
214: result=new(pool) VTable(pool, table);
215: } else // not matched [not global]
216: result=new(pool) VBool(pool, false);
217: } else { // replace
1.38 paf 218: Value& replacement_code=params->get_junction(2, "replacement code must be code");
1.24 paf 219:
1.28 paf 220: String& dest=*new(pool) String(pool);
1.27 paf 221: Replace_action_info replace_action_info={
1.30 paf 222: &r, &method_name,
1.31 paf 223: &src, &dest,
1.28 paf 224: &replacement_code,
1.29 paf 225: &src
1.27 paf 226: };
1.39 paf 227: src.match(r.pcre_tables,
228: &method_name,
1.27 paf 229: r.process(regexp).as_string(), options,
230: &table,
1.33 paf 231: replace_action, &replace_action_info);
1.28 paf 232: result=new(pool) VString(dest);
1.27 paf 233: }
1.26 paf 234: result->set_name(method_name);
1.34 paf 235: r.write_assign_lang(*result);
1.24 paf 236: }
237:
1.41 paf 238: // constructor
239:
240: MString::MString(Pool& apool) : Methoded(apool) {
241: set_name(*NEW String(pool(), STRING_CLASS_NAME));
242:
1.9 paf 243:
1.1 paf 244: // ^string.length[]
1.41 paf 245: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 246:
1.1 paf 247: // ^string.int[]
1.41 paf 248: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 249:
1.1 paf 250: // ^string.double[]
1.41 paf 251: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 252:
1.24 paf 253: // ^string.format{format}
1.41 paf 254: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 255:
1.15 paf 256: // ^string.left(n)
1.41 paf 257: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 258: // ^string.right(n)
1.41 paf 259: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 260: // ^string.mid(p;n)
1.41 paf 261: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 262:
263: // ^string.pos[substr]
1.41 paf 264: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 265:
266: // ^string.lsplit[delim]
1.41 paf 267: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 268: // ^string.rsplit[delim]
1.41 paf 269: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 270:
1.32 paf 271: // ^string.match[regexp][options]
272: // ^string.match[regexp][options]{replacement-code}
1.41 paf 273: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.2 paf 274: }
1.1 paf 275:
1.41 paf 276: // global variable
277:
278: Methoded *string_class;
279:
280: // creator
281:
282: Methoded *MString_create(Pool& pool) {
283: return string_class=new(pool) MString(pool);
284: }
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