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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
/* duktape binding generation implementation
*
* This file is part of nsgenbind.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2012 Vincent Sanders <vince@netsurf-browser.org>
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <errno.h>
#include <ctype.h>
#include "options.h"
#include "utils.h"
#include "nsgenbind-ast.h"
#include "webidl-ast.h"
#include "interface-map.h"
#include "duk-libdom.h"
#define NSGENBIND_PREAMBLE \
"/* Generated by nsgenbind\n" \
" *\n" \
" * nsgenbind is published under the MIT Licence.\n" \
" * nsgenbind is similar to a compiler is a purely transformative tool which\n"\
" * explicitly makes no copyright claim on this generated output\n"\
" */"
/**
* Generate a C class name for the interface.
*
* The IDL interface names are camelcase and not similar to libdom naming so it
* is necessary to convert them to a libdom compatible class name. This
* implementation is simple ASCII capable only and cannot cope with multibyte
* codepoints.
*
* The algorithm is:
* - copy characters to output lowering their case
* - if the previous character in the input name was uppercase and the current
* one is lowercase insert an underscore before the *previous* character.
*/
static char *gen_class_name(struct interface_map_entry *interfacee)
{
const char *inc;
char *outc;
char *name;
int wasupper;
/* enpty strings are a bad idea */
if ((interfacee->name == NULL) || (interfacee->name[0] == 0)) {
return NULL;
}
/* allocate result buffer as twice the input length as thats the
* absolute worst case.
*/
name = calloc(2, strlen(interfacee->name));
outc = name;
inc = interfacee->name;
wasupper = 0;
/* first character handled separately as inserting a leading underscore
* is undesirable
*/
*outc++ = tolower(*inc++);
/* copy input to output */
while (*inc != 0) {
/* ugly hack as html IDL is always prefixed uppercase and needs
* an underscore there
*/
if ((inc == (interfacee->name + 4)) &&
(interfacee->name[0] == 'H') &&
(interfacee->name[1] == 'T') &&
(interfacee->name[2] == 'M') &&
(interfacee->name[3] == 'L') &&
(islower(inc[1]) == 0)) {
*outc++ = '_';
}
if ((islower(*inc) != 0) && (wasupper != 0)) {
*outc = *(outc - 1);
*(outc - 1) = '_';
outc++;
wasupper = 0;
} else {
wasupper = isupper(*inc);
}
*outc++ = tolower(*inc++);
}
return name;
}
/**
* output character data of node of given type.
*
* used for pre/pro/epi/post sections
*/
static int
output_cdata(FILE* outf,
struct genbind_node *node,
enum genbind_node_type nodetype)
{
char *cdata;
cdata = genbind_node_gettext(
genbind_node_find_type(
genbind_node_getnode(node),
NULL, nodetype));
if (cdata != NULL) {
fprintf(outf, "%s\n", cdata);
}
return 0;
}
static int
output_interface_fini(FILE* outf,
struct interface_map_entry *interfacee,
struct interface_map_entry *inherite)
{
struct genbind_node *fini_node;
struct genbind_node *type_node;
int *type;
/* finaliser definition */
fprintf(outf,
"void dukky_%s___fini(duk_context *ctx, %s_private_t *priv)\n",
interfacee->class_name, interfacee->class_name);
fprintf(outf,"{\n");
/* generate log statement */
if (options->dbglog) {
fprintf(outf,
"\tLOG(\"Finalise %%p\", duk_get_heapptr(ctx, 0));\n" );
}
/* find the finaliser method on the class (if any) */
fini_node = genbind_node_find_type(
genbind_node_getnode(interfacee->class),
NULL, GENBIND_NODE_TYPE_METHOD);
while (fini_node != NULL) {
type_node = genbind_node_find_type(
genbind_node_getnode(fini_node),
NULL, GENBIND_NODE_TYPE_METHOD_TYPE);
type = genbind_node_getint(type_node);
if (*type == GENBIND_METHOD_TYPE_FINI) {
break;
}
fini_node = genbind_node_find_type(
genbind_node_getnode(interfacee->class),
fini_node, GENBIND_NODE_TYPE_METHOD);
}
output_cdata(outf, fini_node, GENBIND_NODE_TYPE_CDATA);
/* if this interface inherits ensure we call its finaliser */
if (inherite != NULL) {
fprintf(outf,
"\tdukky_%s___fini(ctx, &priv->parent);\n",
inherite->class_name);
}
fprintf(outf, "}\n");
return 0;
}
/**
* generate a source file to implement an interface using duk and libdom.
*/
static int output_interface(struct genbind_node *genbind,
struct webidl_node *webidl,
struct interface_map *interface_map,
struct interface_map_entry *interfacee)
{
FILE *ifacef;
int ifacenamelen;
struct genbind_node *binding_node;
struct interface_map_entry *inherite;
interfacee->class_name = gen_class_name(interfacee);
/* generate source filename */
ifacenamelen = strlen(interfacee->class_name) + 4;
interfacee->filename = malloc(ifacenamelen);
snprintf(interfacee->filename, ifacenamelen,
"%s.c", interfacee->class_name);
/* open output file */
ifacef = genb_fopen(interfacee->filename, "w");
if (ifacef == NULL) {
return -1;
}
/* find parent interface entry */
inherite = interface_map_inherit_entry(interface_map, interfacee);
/* nsgenbind preamble */
fprintf(ifacef, "%s\n", NSGENBIND_PREAMBLE);
binding_node = genbind_node_find_type(genbind, NULL,
GENBIND_NODE_TYPE_BINDING);
/* binding preface */
output_cdata(ifacef, binding_node, GENBIND_NODE_TYPE_PREFACE);
/* class preface */
output_cdata(ifacef, interfacee->class, GENBIND_NODE_TYPE_PREFACE);
/* binding prologue */
output_cdata(ifacef, binding_node, GENBIND_NODE_TYPE_PROLOGUE);
/* class prologue */
output_cdata(ifacef, interfacee->class, GENBIND_NODE_TYPE_PROLOGUE);
/* initialisor */
//output_interface_init();
/* finaliser */
output_interface_fini(ifacef, interfacee, inherite);
/* constructor */
/* destructor */
/* class epilogue */
output_cdata(ifacef, interfacee->class, GENBIND_NODE_TYPE_EPILOGUE);
/* binding epilogue */
output_cdata(ifacef, binding_node, GENBIND_NODE_TYPE_EPILOGUE);
/* class postface */
output_cdata(ifacef, interfacee->class, GENBIND_NODE_TYPE_POSTFACE);
/* binding postface */
output_cdata(ifacef, binding_node, GENBIND_NODE_TYPE_POSTFACE);
fclose(ifacef);
return 0;
}
int duk_libdom_output(struct genbind_node *genbind,
struct webidl_node *webidl,
struct interface_map *interface_map)
{
int idx;
int res = 0;
/* generate interfaces */
for (idx = 0; idx < interface_map->entryc; idx++) {
res = output_interface(genbind, webidl, interface_map,
&interface_map->entries[idx]);
if (res != 0) {
break;
}
}
/* generate header */
/** \todo implement header */
/* generate makefile fragment */
/** \todo implement makefile generation */
return res;
}
|
