Annotation of parser3/src/classes/string.C, revision 1.30
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:
1.30 ! paf 8: $Id: string.C,v 1.29 2001/04/03 15:35:23 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}
49: r.fail_if_junction_(false, fmt, method_name, "fmt must be junction");
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();
63: r.write_assign_lang(*new(pool) VString(string.piece(0, n)));
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();
72: r.write_assign_lang(*new(pool) VString(string.piece(string.size()-n, string.size())));
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();
82: r.write_assign_lang(*new(pool) VString(string.piece(p, p+n)));
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]
1.16 paf 90: r.fail_if_junction_(true, substr, method_name, "substr must not be junction");
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]
103: r.fail_if_junction_(true, delim_value, method_name, "delimiter must not be junction");
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:
1.28 paf 140: static void search_row_action(Table& table, Array *row, void *) {
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;
1.28 paf 147: String *dest;
1.27 paf 148: Value *replacement_code;
1.28 paf 149: bool first_time;
1.29 paf 150: const String *post_match;
1.27 paf 151: };
1.28 paf 152: static void replace_row_action(Table& table, Array *row, void *info) {
1.27 paf 153: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.29 paf 154: if(row) { // begin/middle
1.30 ! paf 155: // store found parts in one-record Vtable
1.29 paf 156: if(ai.first_time) { // begin
157: ai.first_time=false;
158: ai.dest->append(*(String *)row->get(0/*pre_match*/),
159: String::UL_PASS_APPENDED);
1.30 ! paf 160: table+=row;
! 161: } else
! 162: table.put(0, 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();
! 168: junction->rcontext/*=junction->self*/=&vtable;
! 169: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
! 170:
! 171: ai.dest->append(replaced.as_string(), String::UL_PASS_APPENDED);
1.29 paf 172: }
173: ai.post_match=(String *)row->get(2/*post_match*/);
174: } else // end
175: ai.dest->append(*ai.post_match, String::UL_PASS_APPENDED);
1.27 paf 176: }
177:
178: /** search/replace
179: ^string.match{regexp}[options]
180: ^string.match{regexp}[options]{replacement-code}
181: */
1.24 paf 182: static void _match(Request& r, const String& method_name, Array *params) {
183: Pool& pool=r.pool();
1.28 paf 184: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 185:
186: Value& regexp=*static_cast<Value *>(params->get(0));
187: // forcing {this param type}
188: r.fail_if_junction_(false, regexp, method_name, "regexp must be junction");
189:
1.26 paf 190: const String *options=0;
191: if(params->size()>1) {
192: Value& value=*static_cast<Value *>(params->get(1));
193: // forcing {this param type}
194: r.fail_if_junction_(true, value, method_name, "options must not be junction");
195: options=&value.as_string();
196: }
1.24 paf 197:
1.27 paf 198: Value *result;
1.24 paf 199: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 200: Table *table;
1.27 paf 201: if(params->size()<3) { // search
1.28 paf 202: if(src.match(&method_name,
1.27 paf 203: r.process(regexp).as_string(), options,
204: &table,
205: search_row_action, 0)) {
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
215: Value& replacement_code=*static_cast<Value *>(params->get(2));
216: // forcing {this param type}
217: r.fail_if_junction_(false, replacement_code,
218: method_name, "replacement code must be junction");
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,
1.28 paf 223: &dest,
224: &replacement_code,
1.29 paf 225: true,
226: &src
1.27 paf 227: };
1.28 paf 228: src.match(&method_name,
1.27 paf 229: r.process(regexp).as_string(), options,
230: &table,
231: replace_row_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);
1.25 paf 235: r.write_no_lang(*result);
1.24 paf 236: }
237:
1.11 paf 238: // initialize
1.9 paf 239:
1.10 paf 240: void initialize_string_class(Pool& pool, VStateless_class& vclass) {
1.1 paf 241: // ^string.length[]
1.22 paf 242: vclass.add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 243:
1.1 paf 244: // ^string.int[]
1.22 paf 245: vclass.add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 246:
1.1 paf 247: // ^string.double[]
1.22 paf 248: vclass.add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 249:
1.24 paf 250: // ^string.format{format}
1.22 paf 251: vclass.add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 252:
1.15 paf 253: // ^string.left(n)
1.22 paf 254: vclass.add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 255: // ^string.right(n)
1.22 paf 256: vclass.add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 257: // ^string.mid(p;n)
1.22 paf 258: vclass.add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 259:
260: // ^string.pos[substr]
1.22 paf 261: vclass.add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 262:
263: // ^string.lsplit[delim]
1.22 paf 264: vclass.add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 265: // ^string.rsplit[delim]
1.22 paf 266: vclass.add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 267:
268: // ^string.match{regexp}[options]
1.27 paf 269: // ^string.match{regexp}[options]{replacement-code}
1.28 paf 270: vclass.add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.2 paf 271: }
1.1 paf 272:
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