aboutsummaryrefslogtreecommitdiff
path: root/src/unstable/minimacro.cpp
blob: c6acd0c5403a2a18b075d1cec8492c08b9f2d329 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
/*
 * Copyright (C) 2007-2014 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#include "bu/minimacro.h"

Bu::MiniMacro::MiniMacro()
{
    hFuncs.insert("toupper", new FuncToUpper() );
    hFuncs.insert("tolower", new FuncToLower() );
}

Bu::MiniMacro::MiniMacro( const StrHash &sVarSrc )
{
    for( StrHash::const_iterator i = sVarSrc.begin(); i != sVarSrc.end(); i++ )
    {
        addVar( i.getKey(), i.getValue() );
    }
}

Bu::MiniMacro::~MiniMacro()
{
}

Bu::String Bu::MiniMacro::parse( const Bu::String &sIn )
{
    bContinue = true;
    Bu::String sOut;
    for( sCur = sIn.getStr(); *sCur && bContinue; sCur++ )
    {
        if( *sCur == '{' )
        {
            switch( sCur[1] )
            {
                case '=':
                    sCur += 2;
                    sOut += parseRepl();
                    break;

                case '?':
                    sCur += 2;
                    sOut += parseCond();
                    break;

                case ':':
                    sCur += 2;
                    sOut += parseCmd();
                    break;

                default:
                    sOut += *sCur;
                    continue;
            }
        }
        else
        {
            sOut += *sCur;
        }
    }

    iLastPos = (ptrdiff_t)sCur - (ptrdiff_t)sIn.getStr();

    return sOut;
}

Bu::String Bu::MiniMacro::parseRepl()
{
    Bu::String sOut;
    bool bIsFirst = true;
    for( const char *sNext = sCur;;)
    {
        for(; *sNext != ':' && *sNext != '}' && *sNext != '\0'; sNext++ ) { }
        if( *sNext == '\0' )
            break;
        Bu::String sName( sCur, (ptrdiff_t)sNext-(ptrdiff_t)sCur );
        if( bIsFirst )
        {
            sOut = hVars[sName];
            bIsFirst = false;
            //printf("Variable: \"%s\"\n", sName.getStr() );
        }
        else
        {
            sOut = callFunc( sOut, sName );
            //printf("Filter: \"%s\"\n", sName.getStr() );
        }
        if( *sNext == '}' )
        {
            sCur = sNext;
            break;
        }
        else if( *sNext == ':' )
        {
        }
        sNext++;
        sCur = sNext;
    }
    return sOut;
}

Bu::String Bu::MiniMacro::parseCond()
{
    Bu::String sOut;
    //printf("%20s\n", sCur );
    return sOut;
}

Bu::String Bu::MiniMacro::parseCmd()
{
    Bu::String sOut;
    const char *sNext = sCur;
    for(; *sNext != ':' && *sNext != '}' && *sNext != '\0'; sNext++ ) { }
    if( *sNext != '\0' )
    {
        Bu::String sName( sCur, (ptrdiff_t)sNext-(ptrdiff_t)sCur );
        if( sName == "end" )
        {
            sCur = sNext;
            bContinue = false;
            return sOut;
        }
        else
        {
            throw Bu::ExceptionBase("Unknown command '%s'.",
                sName.getStr()
                );
        }
    }
    else
    {
        //printf("Uh...?\n");
    }

    //printf("%20s\n", sCur );
    return sOut;
}

Bu::String Bu::MiniMacro::callFunc(
    const Bu::String &sIn, const Bu::String &sFunc )
{
    int i = sFunc.findIdx('(');
    if( i < 0 )
        throw Bu::ExceptionBase("That doesn't look like a function call");
    Bu::String sName( sFunc.getStr(), i );
    StrList lsParams;
    for( const char *s = sFunc.getStr()+i+1; *s && *s != ')'; s++ )
    {
        for(; *s == ' ' || *s == '\t' || *s == '\r' || *s == '\n'; s++ ) { }
        const char *sNext;
        for( sNext = s; *sNext && *sNext != ')' && *sNext != ','; sNext++ ) { }
        Bu::String p( s, (ptrdiff_t)sNext-(ptrdiff_t)s );
        lsParams.append( p );
        sNext++;
        s = sNext;
    }
    return hFuncs.get( sName )->call( sIn, lsParams );
}

void Bu::MiniMacro::addVar(
    const Bu::String &sName, const Bu::String &sValue )
{
    hVars.insert( sName, sValue );
}

bool Bu::MiniMacro::hasVar( const Bu::String &sName )
{
    return hVars.has( sName );
}

const Bu::String &Bu::MiniMacro::getVar( const Bu::String &sName )
{
    return hVars.get( sName );
}

const Bu::StrHash &Bu::MiniMacro::getVars()
{
    return hVars;
}

int Bu::MiniMacro::getPosition()
{
    return iLastPos;
}