Annotation of parser3/src/classes/string.C, revision 1.48
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:
1.48 ! parser 8: $Id: string.C,v 1.47 2001/05/08 06:07:47 paf Exp $
1.1 paf 9: */
10:
1.43 paf 11: #include "classes.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);
1.44 paf 28: public: // Methoded
1.41 paf 29: bool used_directly() { return false; }
30: };
1.1 paf 31:
32: // methods
33:
1.47 paf 34: static void _length(Request& r, const String& method_name, MethodParams *) {
1.1 paf 35: Pool& pool=r.pool();
1.47 paf 36: Value& result=*new(pool) VDouble(pool, r.self->get_string()->size());
37: result.set_name(method_name);
38: r.write_no_lang(result);
1.1 paf 39: }
40:
1.47 paf 41: static void _int(Request& r, const String& method_name, MethodParams *) {
1.1 paf 42: Pool& pool=r.pool();
1.48 ! parser 43: Value& result=*new(pool) VInt(pool, r.self->as_int());
1.47 paf 44: result.set_name(method_name);
45: r.write_no_lang(result);
1.1 paf 46: }
47:
1.47 paf 48: static void _double(Request& r, const String& method_name, MethodParams *) {
1.1 paf 49: Pool& pool=r.pool();
1.47 paf 50: Value& result=*new(pool) VDouble(pool, r.self->as_double());
51: result.set_name(method_name);
52: r.write_no_lang(result);
1.1 paf 53: }
54:
1.38 paf 55: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 56: Pool& pool=r.pool();
57:
1.38 paf 58: Value& fmt=params->get_junction(0, "fmt must be code");
1.9 paf 59:
1.24 paf 60: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
61: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.9 paf 62:
1.12 paf 63: r.write_no_lang(String(pool, buf));
1.9 paf 64: }
1.11 paf 65:
1.38 paf 66: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 67: Pool& pool=r.pool();
68:
1.38 paf 69: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 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(0, n)));
1.15 paf 73: }
74:
1.38 paf 75: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 76: Pool& pool=r.pool();
77:
1.38 paf 78: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 79:
80: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 81: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 82: }
83:
1.38 paf 84: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 85: Pool& pool=r.pool();
86:
1.38 paf 87: size_t p=(size_t)r.process(params->get(0)).as_double();
88: size_t n=(size_t)r.process(params->get(1)).as_double();
1.15 paf 89:
90: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 91: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 92: }
93:
1.38 paf 94: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 95: Pool& pool=r.pool();
96:
1.38 paf 97: Value& substr=params->get_no_junction(0, "substr must not be code");
1.16 paf 98:
99: const String& string=*static_cast<VString *>(r.self)->get_string();
100: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
101: }
102:
1.38 paf 103: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 104: const String& string,
105: Array& result) {
1.38 paf 106: Value& delim_value=params->get_no_junction(0, "delimiter must not be code");
1.23 paf 107:
1.45 paf 108: string.split(result, 0, delim_value.as_string());
1.19 paf 109: }
110:
1.38 paf 111: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 112: Pool& pool=r.pool();
113: const String& string=*static_cast<VString *>(r.self)->get_string();
114:
1.21 paf 115: Array& row=*new(pool) Array(pool);
116: split_list(r, method_name, params, string, row);
1.19 paf 117:
1.21 paf 118: Table& table=*new(pool) Table(pool, &string,
119: 0/*nameless*/, 1/*row preallocate(and only)*/);
120: table+=&row;
1.19 paf 121:
122: r.write_no_lang(*new(pool) VTable(pool, &table));
123: }
124:
1.38 paf 125: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 126: Pool& pool=r.pool();
127: const String& string=*static_cast<VString *>(r.self)->get_string();
128:
129: Array list(pool);
130: split_list(r, method_name, params, string, list);
131:
1.21 paf 132: Array& row=*new(pool) Array(pool);
133: for(int i=list.size(); --i>=0; )
134: row+=list.get(i);
135:
136: Table& table=*new(pool) Table(pool, &string,
137: 0/*nameless*/, 1/*row preallocate(and only)*/);
138: table+=&row;
1.17 paf 139:
1.19 paf 140: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 141: }
142:
1.33 paf 143: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 144: if(row)
145: table+=row;
1.27 paf 146: }
147:
1.40 paf 148: /// used by string: _match / replace_action
1.27 paf 149: struct Replace_action_info {
1.30 paf 150: Request *request; const String *origin;
1.31 paf 151: const String *src; String *dest;
1.27 paf 152: Value *replacement_code;
1.29 paf 153: const String *post_match;
1.27 paf 154: };
1.33 paf 155: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 156: void *info) {
1.27 paf 157: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 158: if(row) { // begin&middle
159: // piece from last match['start'] to beginning of this match['finish']
160: if(start!=finish)
1.37 paf 161: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.30 paf 162: // store found parts in one-record Vtable
1.32 paf 163: if(table.size()) // middle
164: table.put(0, row);
165: else // begin
1.30 paf 166: table+=row;
167: { // execute 'replacement_code' in 'table' context
168: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
169: vtable.set_name(*ai.origin);
170:
171: Junction *junction=ai.replacement_code->get_junction();
1.34 paf 172: junction->rcontext=junction->root=&vtable;
1.30 paf 173: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
174:
1.34 paf 175: /*
1.31 paf 176: ai.dest->APPEND_CONST("(");
1.37 paf 177: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 178: ai.dest->APPEND_CONST(")");
1.34 paf 179: */
1.37 paf 180: *ai.dest << replaced.as_string();
1.29 paf 181: }
182: ai.post_match=(String *)row->get(2/*post_match*/);
183: } else // end
1.37 paf 184: *ai.dest << *ai.post_match;
1.27 paf 185: }
186:
1.38 paf 187: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 188: Pool& pool=r.pool();
1.28 paf 189: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 190:
1.38 paf 191: Value& regexp=params->get_no_junction(0, "regexp must not be code");
192:
193: const String *options=
194: params->size()>1?
195: ¶ms->get_no_junction(1, "options must not be code").as_string():0;
1.24 paf 196:
1.27 paf 197: Value *result;
1.24 paf 198: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 199: Table *table;
1.27 paf 200: if(params->size()<3) { // search
1.39 paf 201: if(src.match(r.pcre_tables,
202: &method_name,
1.32 paf 203: regexp.as_string(), options,
1.27 paf 204: &table,
1.33 paf 205: search_action, 0)) {
1.27 paf 206: // matched
207: if(table->columns()->size()==3 && // just matched[3=pre/match/post], no substrings
208: table->size()==1) // just one row, not /g_lobal search
209: result=new(pool) VBool(pool, true);
210: else // table of pre/match/post+substrings
211: result=new(pool) VTable(pool, table);
212: } else // not matched [not global]
213: result=new(pool) VBool(pool, false);
214: } else { // replace
1.38 paf 215: Value& replacement_code=params->get_junction(2, "replacement code must be code");
1.24 paf 216:
1.28 paf 217: String& dest=*new(pool) String(pool);
1.27 paf 218: Replace_action_info replace_action_info={
1.30 paf 219: &r, &method_name,
1.31 paf 220: &src, &dest,
1.28 paf 221: &replacement_code,
1.29 paf 222: &src
1.27 paf 223: };
1.39 paf 224: src.match(r.pcre_tables,
225: &method_name,
1.27 paf 226: r.process(regexp).as_string(), options,
227: &table,
1.33 paf 228: replace_action, &replace_action_info);
1.28 paf 229: result=new(pool) VString(dest);
1.27 paf 230: }
1.26 paf 231: result->set_name(method_name);
1.34 paf 232: r.write_assign_lang(*result);
1.24 paf 233: }
234:
1.41 paf 235: // constructor
236:
237: MString::MString(Pool& apool) : Methoded(apool) {
238: set_name(*NEW String(pool(), STRING_CLASS_NAME));
239:
1.9 paf 240:
1.1 paf 241: // ^string.length[]
1.41 paf 242: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 243:
1.1 paf 244: // ^string.int[]
1.41 paf 245: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 246:
1.1 paf 247: // ^string.double[]
1.41 paf 248: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 249:
1.24 paf 250: // ^string.format{format}
1.41 paf 251: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 252:
1.15 paf 253: // ^string.left(n)
1.41 paf 254: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 255: // ^string.right(n)
1.41 paf 256: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 257: // ^string.mid(p;n)
1.41 paf 258: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 259:
260: // ^string.pos[substr]
1.41 paf 261: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 262:
263: // ^string.lsplit[delim]
1.41 paf 264: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 265: // ^string.rsplit[delim]
1.41 paf 266: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 267:
1.32 paf 268: // ^string.match[regexp][options]
269: // ^string.match[regexp][options]{replacement-code}
1.41 paf 270: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.2 paf 271: }
1.1 paf 272:
1.41 paf 273: // global variable
274:
275: Methoded *string_class;
276:
277: // creator
278:
279: Methoded *MString_create(Pool& pool) {
280: return string_class=new(pool) MString(pool);
281: }
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