source: libcfa/src/parseconfig.cfa @ 4bb5d36

ADTast-experimentalpthread-emulationqualifiedEnum
Last change on this file since 4bb5d36 was 4bb5d36, checked in by Thierry Delisle <tdelisle@…>, 19 months ago

Visibility stragglers.
cfa_linkonce always means visibility default.

  • Property mode set to 100644
File size: 6.3 KB
Line 
1
2
3#pragma GCC diagnostic push
4//#pragma GCC diagnostic ignored "-Wunused-parameter"
5//#pragma GCC diagnostic ignored "-Wunused-function"
6//#pragma GCC diagnostic ignored "-Wuninitialized"
7//#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
8
9#include <fstream.hfa>
10#include <parseargs.hfa>
11#include <stdlib.hfa>
12#include <string.h>
13#include "parseconfig.hfa"
14
15
16#pragma GCC visibility push(default)
17
18// *********************************** exceptions ***********************************
19
20
21// TODO: Add names of missing config entries to exception (see further below)
22vtable(Missing_Config_Entries) Missing_Config_Entries_vt;
23
24[ void ] ?{}( & Missing_Config_Entries this, unsigned int num_missing ) {
25        this.virtual_table = &Missing_Config_Entries_vt;
26        this.num_missing = num_missing;
27}
28
29// TODO: use string interface when it's ready (and implement exception msg protocol)
30[ void ] msg( * Missing_Config_Entries ex ) {
31        serr | "The config file is missing " | ex->num_missing | "entr" | sepOff | (ex->num_missing == 1 ? "y." : "ies.");
32} // msg
33
34
35vtable(Parse_Failure) Parse_Failure_vt;
36
37[ void ] ?{}( & Parse_Failure this, [] char failed_key, [] char failed_value ) {
38        this.virtual_table = &Parse_Failure_vt;
39
40        this.failed_key = alloc( strlen( failed_key ) );
41        this.failed_value = alloc( strlen( failed_value ) );
42        strcpy( this.failed_key, failed_key );
43        strcpy( this.failed_value, failed_value );
44}
45
46[ void ] ^?{}( & Parse_Failure this ) with ( this ) {
47        free( failed_key );
48        free( failed_value );
49}
50
51// TODO: use string interface when it's ready (and implement exception msg protocol)
52[ void ] msg( * Parse_Failure ex ) {
53        serr | "Config entry " | ex->failed_key | " could not be parsed. It has value " | ex->failed_value | ".";
54}
55
56
57vtable(Validation_Failure) Validation_Failure_vt;
58
59[ void ] ?{}( & Validation_Failure this, [] char failed_key, [] char failed_value ) {
60        this.virtual_table = &Validation_Failure_vt;
61
62        this.failed_key = alloc( strlen( failed_key ) );
63        this.failed_value = alloc( strlen( failed_value ) );
64        strcpy( this.failed_key, failed_key );
65        strcpy( this.failed_value, failed_value );
66}
67
68[ void ] ^?{}( & Validation_Failure this ) with ( this ) {
69        free( failed_key );
70        free( failed_value );
71}
72
73// TODO: use string interface when it's ready (and implement exception msg protocol)
74[ void ] msg( * Validation_Failure ex ) {
75        serr | "Config entry " | ex->failed_key | " could not be validated. It has value " | ex->failed_value | ".";
76}
77
78
79// *********************************** main code ***********************************
80
81
82[ void ] ?{}( & KVPairs kvp ) with ( kvp ) {                            // default constructor
83        size = 0; max_size = 0; data = 0p;
84}
85
86[ void ] ?{}( & KVPairs kvp, size_t size ) {                            // initialization
87        kvp.[ size, max_size ] = [ 0, size ];
88        kvp.data = alloc( size );
89}
90
91[ void ] ^?{}( & KVPairs kvp ) with ( kvp ) {                           // destructor
92        for ( i; size ) free( data[i] );
93        free( data );
94        size = 0; max_size = 0; data = 0p;
95}
96
97[ void ] add_kv_pair( & KVPairs kv_pairs, [] char key, [] char value ) with ( kv_pairs ) {
98        if ( max_size == 0 ) {
99                max_size = 1;
100                data = alloc( max_size );
101        } else if ( size == max_size ) {
102                max_size *= 2;
103                data = alloc( max_size, data`realloc );
104        }
105
106        data[size].0 = alloc( strlen( key ) );
107        data[size].1 = alloc( strlen( value ) );
108        strcpy( data[size].0, key );
109        strcpy( data[size].1, value );
110        ++size;
111} // add_kv_pair
112
113
114static [ bool ] comments( & ifstream in, [] char name ) {
115        while () {
116                in | name;
117          if ( eof( in ) ) return true;
118          if ( name[0] != '#' ) return false;
119                in | nl;                                                                        // ignore remainder of line
120        } // while
121} // comments
122
123// Parse configuration from a file formatted in tabular (CS 343) style
124[ * KVPairs ] parse_tabular_config_format( [] const char config_file, size_t num_entries ) {
125        // TODO: Change this to a unique_ptr when we fully support returning them (move semantics)
126        * KVPairs kv_pairs = new( num_entries );
127
128        ifstream in;
129        try {
130                open( in, config_file );                                        // open the configuration file for input
131
132                [64] char key;
133                [256] char value;
134
135                while () {                                                                      // parameter names can appear in any order
136                        // NOTE: Must add check to see if already read in value for this key,
137                        // once we switch to using hash table as intermediate storage
138                  if ( comments( in, key ) ) break;                     // eof ?
139                        in | value;
140
141                        add_kv_pair( *kv_pairs, key, value );
142
143                  if ( eof( in ) ) break;
144                        in | nl;                                                                // ignore remainder of line
145                } // for
146        } catch( Open_Failure * ex; ex->istream == &in ) {
147                delete( kv_pairs );
148                throw *ex;
149        } // try
150        close( in );
151
152        return kv_pairs;
153} // parse_tabular_config_format
154
155// Parse configuration values from intermediate format
156[ void ] parse_config(
157                [] const char config_file,
158                [] config_entry entries,
159                size_t num_entries,
160                KVPairs * (*parser)(const char [], size_t)
161) {
162        * KVPairs kv_pairs = parser( config_file, num_entries );
163
164        int entries_so_far = 0;
165        for ( i; kv_pairs->size ) {
166          if ( entries_so_far == num_entries ) break;
167
168                char * src_key, * src_value;
169                [ src_key, src_value ] = kv_pairs->data[i];
170
171                for ( j; num_entries ) {
172                  if ( strcmp( src_key, entries[j].key ) != 0 ) continue;
173                        // Parse the data
174                        if ( !entries[j].parse( src_value, entries[j].variable ) ) {
175                                * Parse_Failure ex = new( src_key, src_value );
176                                delete( kv_pairs );
177                                throw *ex;
178                        }
179
180                        // Validate the data
181                        if ( !entries[j].validate( entries[j].variable ) ) {
182                                * Validation_Failure ex = new( src_key, src_value );
183                                delete( kv_pairs );
184                                throw *ex;
185                        }
186
187                        ++entries_so_far;
188
189                        break;
190                }
191        }
192        // TODO: Once we get vector2+hash_table, we can more easily add the missing config keys to this error
193        if ( entries_so_far < num_entries ) {
194                delete( kv_pairs );
195                throw (Missing_Config_Entries){ num_entries - entries_so_far };
196        }
197
198        delete( kv_pairs );
199} // parse_config
200
201
202// *********************************** validation ***********************************
203
204
205forall(T | Relational( T ))
206[ bool ] is_nonnegative( & T value ) {
207        T zero_val = 0;
208        return value >= zero_val;
209}
210
211forall(T | Relational( T ))
212[ bool ] is_positive( & T value ) {
213        T zero_val = 0;
214        return value > zero_val;
215}
216
217forall(T | Relational( T ))
218[ bool ] is_nonpositive( & T value ) {
219        T zero_val = 0;
220        return value <= zero_val;
221}
222
223forall(T | Relational( T ))
224[ bool ] is_negative( & T value ) {
225        T zero_val = 0;
226        return value < zero_val;
227}
228#pragma GCC diagnostic pop
229
230
231// Local Variables: //
232// tab-width: 4 //
233// compile-command: "cfa parseconfig.cfa" //
234// End: //
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