summaryrefslogtreecommitdiffstats
path: root/src/tools/vppapigen/vppapigen_c.py
blob: d6cdda8baac6deb876b378e6a12122a14d21e964 (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
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
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
# C generation
import datetime
import os
import time
import sys
from io import StringIO

datestring = datetime.datetime.utcfromtimestamp(
    int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
input_filename = 'inputfil'
top_boilerplate = '''\
/*
 * VLIB API definitions {datestring}
 * Input file: {input_filename}
 * Automatically generated: please edit the input file NOT this file!
 */

#include <stdbool.h>
#if defined(vl_msg_id)||defined(vl_union_id) \\
    || defined(vl_printfun) ||defined(vl_endianfun) \\
    || defined(vl_api_version)||defined(vl_typedefs) \\
    || defined(vl_msg_name)||defined(vl_msg_name_crc_list) \\
    || defined(vl_api_version_tuple)
/* ok, something was selected */
#else
#warning no content included from {input_filename}
#endif

#define VL_API_PACKED(x) x __attribute__ ((packed))
'''

bottom_boilerplate = '''\
/****** API CRC (whole file) *****/

#ifdef vl_api_version
vl_api_version({input_filename}, {file_crc:#08x})

#endif
'''


def msg_ids(s):
    output = '''\

/****** Message ID / handler enum ******/

#ifdef vl_msg_id
'''

    for t in s['Define']:
        output += "vl_msg_id(VL_API_%s, vl_api_%s_t_handler)\n" % \
                  (t.name.upper(), t.name)
    output += "#endif"

    return output


def msg_names(s):
    output = '''\

/****** Message names ******/

#ifdef vl_msg_name
'''

    for t in s['Define']:
        dont_trace = 0 if t.dont_trace else 1
        output += "vl_msg_name(vl_api_%s_t, %d)\n" % (t.name, dont_trace)
    output += "#endif"

    return output


def msg_name_crc_list(s, suffix):
    output = '''\

/****** Message name, crc list ******/

#ifdef vl_msg_name_crc_list
'''
    output += "#define foreach_vl_msg_name_crc_%s " % suffix

    for t in s['Define']:
        output += "\\\n_(VL_API_%s, %s, %08x) " % \
                   (t.name.upper(), t.name, t.crc)
    output += "\n#endif"

    return output


def api2c(fieldtype):
    mappingtable = {'string': 'vl_api_string_t', }
    if fieldtype in mappingtable:
        return mappingtable[fieldtype]
    return fieldtype


def typedefs(objs, aliases, filename):
    name = filename.replace('.', '_')
    output = '''\


/****** Typedefs ******/

#ifdef vl_typedefs
#ifndef included_{module}_typedef
#define included_{module}_typedef
'''
    output = output.format(module=name)

    for k, v in aliases.items():
        if 'length' in v.alias:
            output += ('typedef %s vl_api_%s_t[%s];\n'
                       % (v.alias['type'], k, v.alias['length']))
        else:
            output += 'typedef %s vl_api_%s_t;\n' % (v.alias['type'], k)

    for o in objs:
        tname = o.__class__.__name__
        if tname == 'Enum':
            if o.enumtype == 'u32':
                output += "typedef enum {\n"
            else:
                output += "typedef enum __attribute__((__packed__)) {\n"

            for b in o.block:
                output += "    %s = %s,\n" % (b[0], b[1])
            output += '} vl_api_%s_t;\n' % o.name
            if o.enumtype != 'u32':
                size1 = 'sizeof(vl_api_%s_t)' % o.name
                size2 = 'sizeof(%s)' % o.enumtype
                err_str = 'size of API enum %s is wrong' % o.name
                output += ('STATIC_ASSERT(%s == %s, "%s");\n'
                           % (size1, size2, err_str))
        else:
            if tname == 'Union':
                output += "typedef VL_API_PACKED(union _vl_api_%s {\n" % o.name
            else:
                output += ("typedef VL_API_PACKED(struct _vl_api_%s {\n"
                           % o.name)
            for b in o.block:
                if b.type == 'Option':
                    continue
                if b.type == 'Field':
                    output += "    %s %s;\n" % (api2c(b.fieldtype),
                                                b.fieldname)
                elif b.type == 'Array':
                    if b.lengthfield:
                        output += "    %s %s[0];\n" % (api2c(b.fieldtype),
                                                       b.fieldname)
                    else:
                        # Fixed length strings decay to nul terminated u8
                        if b.fieldtype == 'string':
                            if b.modern_vla:
                                output += ('    {} {};\n'
                                           .format(api2c(b.fieldtype),
                                                   b.fieldname))
                            else:
                                output += ('    u8 {}[{}];\n'
                                           .format(b.fieldname, b.length))
                        else:
                            output += ("    %s %s[%s];\n" %
                                       (api2c(b.fieldtype), b.fieldname,
                                        b.length))
                else:
                    raise ValueError("Error in processing type {} for {}"
                                     .format(b, o.name))

            output += '}) vl_api_%s_t;\n' % o.name

    output += "\n#endif"
    output += "\n#endif\n\n"

    return output


format_strings = {'u8': '%u',
                  'bool': '%u',
                  'i8': '%d',
                  'u16': '%u',
                  'i16': '%d',
                  'u32': '%u',
                  'i32': '%ld',
                  'u64': '%llu',
                  'i64': '%llu',
                  'f64': '%.2f'}

noprint_fields = {'_vl_msg_id': None,
                  'client_index': None,
                  'context': None}


class Printfun():
    _dispatch = {}

    def __init__(self, stream):
        self.stream = stream

    def print_string(self, o, stream):
        write = stream.write
        if o.modern_vla:
            write('    if (vl_api_string_len(&a->{f}) > 0) {{\n'
                  .format(f=o.fieldname))
            write('        s = format(s, "\\n%U{f}: %.*s", '
                  'format_white_space, indent, '
                  'vl_api_string_len(&a->{f}) - 1, '
                  'vl_api_from_api_string(&a->{f}));\n'.format(f=o.fieldname))
            write('    } else {\n')
            write('        s = format(s, "\\n%U{f}:", '
                  'format_white_space, indent);\n'.format(f=o.fieldname))
            write('    }\n')
        else:
            write('    s = format(s, "\\n%U{f}: %s", '
                  'format_white_space, indent, a->{f});\n'
                  .format(f=o.fieldname))

    def print_field(self, o, stream):
        write = stream.write
        if o.fieldname in noprint_fields:
            return
        if o.fieldtype in format_strings:
            f = format_strings[o.fieldtype]
            write('    s = format(s, "\\n%U{n}: {f}", '
                  'format_white_space, indent, a->{n});\n'
                  .format(n=o.fieldname, f=f))
        else:
            write('    s = format(s, "\\n%U{n}: %U", '
                  'format_white_space, indent, '
                  'format_{t}, &a->{n}, indent);\n'
                  .format(n=o.fieldname, t=o.fieldtype))

    _dispatch['Field'] = print_field

    def print_array(self, o, stream):
        write = stream.write

        forloop = '''\
    for (i = 0; i < {lfield}; i++) {{
        s = format(s, "\\n%U{n}: %U",
                   format_white_space, indent, format_{t}, &a->{n}[i], indent);
    }}
'''

        forloop_format = '''\
    for (i = 0; i < {lfield}; i++) {{
        s = format(s, "\\n%U{n}: {t}",
                   format_white_space, indent, a->{n}[i]);
    }}
'''

        if o.fieldtype == 'string':
            return self.print_string(o, stream)

        if o.fieldtype == 'u8':
            if o.lengthfield:
                write('    s = format(s, "\\n%U{n}: %U", format_white_space, '
                      'indent, format_hex_bytes, a->{n}, a->{lfield});\n'
                      .format(n=o.fieldname, lfield=o.lengthfield))
            else:
                write('    s = format(s, "\\n%U{n}: %U", format_white_space, '
                      'indent, format_hex_bytes, a, {lfield});\n'
                      .format(n=o.fieldname, lfield=o.length))
            return

        lfield = 'a->' + o.lengthfield if o.lengthfield else o.length
        if o.fieldtype in format_strings:
            write(forloop_format.format(lfield=lfield,
                                        t=format_strings[o.fieldtype],
                                        n=o.fieldname))
        else:
            write(forloop.format(lfield=lfield, t=o.fieldtype, n=o.fieldname))

    _dispatch['Array'] = print_array

    def print_alias(self, k, v, stream):
        write = stream.write
        if ('length' in v.alias and v.alias['length'] and
                v.alias['type'] == 'u8'):
            write('    return format(s, "%U", format_hex_bytes, a, {});\n'
                  .format(v.alias['length']))
        elif v.alias['type'] in format_strings:
            write('    return format(s, "{}", *a);\n'
                  .format(format_strings[v.alias['type']]))
        else:
            write('    return format(s, "{} (print not implemented)"'
                  .format(k))

    def print_enum(self, o, stream):
        write = stream.write
        write("    switch(*a) {\n")
        for b in o:
            write("    case %s:\n" % b[1])
            write('        return format(s, "{}");\n'.format(b[0]))
        write('    }\n')

    _dispatch['Enum'] = print_enum

    def print_obj(self, o, stream):
        write = stream.write

        if o.type in self._dispatch:
            self._dispatch[o.type](self, o, stream)
        else:
            write('    s = format(s, "\\n{} {} {} (print not implemented");\n'
                  .format(o.type, o.fieldtype, o.fieldname))


def printfun(objs, stream, modulename):
    write = stream.write

    h = '''\
/****** Print functions *****/
#ifdef vl_printfun
#ifndef included_{module}_printfun
#define included_{module}_printfun

#ifdef LP64
#define _uword_fmt \"%lld\"
#define _uword_cast (long long)
#else
#define _uword_fmt \"%ld\"
#define _uword_cast long
#endif

'''

    signature = '''\
static inline void *vl_api_{name}_t_print (vl_api_{name}_t *a, void *handle)
{{
    u8 *s = 0;
    u32 indent __attribute__((unused)) = 2;
    int i __attribute__((unused));
'''

    h = h.format(module=modulename)
    write(h)

    pp = Printfun(stream)
    for t in objs:
        if t.manual_print:
            write("/***** manual: vl_api_%s_t_print  *****/\n\n" % t.name)
            continue
        write(signature.format(name=t.name))
        write('    /* Message definition: vl_api_{}_t: */\n'.format(t.name))
        write("    s = format(s, \"vl_api_%s_t:\");\n" % t.name)
        for o in t.block:
            pp.print_obj(o, stream)
        write('    vec_add1(s, 0);\n')
        write('    vl_print (handle, (char *)s);\n')
        write('    vec_free (s);\n')
        write('    return handle;\n')
        write('}\n\n')

    write("\n#endif")
    write("\n#endif /* vl_printfun */\n")

    return ''


def printfun_types(objs, aliases, stream, modulename):
    write = stream.write
    pp = Printfun(stream)

    h = '''\
/****** Print functions *****/
#ifdef vl_printfun
#ifndef included_{module}_printfun_types
#define included_{module}_printfun_types

'''
    h = h.format(module=modulename)
    write(h)

    signature = '''\
static inline u8 *format_vl_api_{name}_t (u8 *s, va_list * args)
{{
    vl_api_{name}_t *a = va_arg (*args, vl_api_{name}_t *);
    u32 indent __attribute__((unused)) = va_arg (*args, u32);
    int i __attribute__((unused));
    indent += 2;
'''

    for k, v in aliases.items():
        if v.manual_print:
            write("/***** manual: vl_api_%s_t_print  *****/\n\n" % k)
            continue

        write(signature.format(name=k))
        pp.print_alias(k, v, stream)
        write('}\n\n')

    for t in objs:
        if t.__class__.__name__ == 'Enum':
            write(signature.format(name=t.name))
            pp.print_enum(t.block, stream)
            write('    return s;\n')
            write('}\n\n')
            continue

        if t.manual_print:
            write("/***** manual: vl_api_%s_t_print  *****/\n\n" % t.name)
            continue

        write(signature.format(name=t.name))
        for o in t.block:
            pp.print_obj(o, stream)

        write('    return s;\n')
        write('}\n\n')

    write("\n#endif")
    write("\n#endif /* vl_printfun_types */\n")


def imports(imports):
    output = '/* Imported API files */\n'
    output += '#ifndef vl_api_version\n'

    for i in imports:
        s = i.filename.replace('plugins/', '')
        output += '#include <{}.h>\n'.format(s)
    output += '#endif\n'
    return output


endian_strings = {
    'u16': 'clib_net_to_host_u16',
    'u32': 'clib_net_to_host_u32',
    'u64': 'clib_net_to_host_u64',
    'i16': 'clib_net_to_host_u16',
    'i32': 'clib_net_to_host_u32',
    'i64': 'clib_net_to_host_u64',
    'f64': 'clib_net_to_host_u64',
}


def endianfun_array(o):
    forloop = '''\
    for (i = 0; i < {length}; i++) {{
        a->{name}[i] = {format}(a->{name}[i]);
    }}
'''

    forloop_format = '''\
    for (i = 0; i < {length}; i++) {{
        {type}_endian(&a->{name}[i]);
    }}
'''

    output = ''
    if o.fieldtype == 'u8' or o.fieldtype == 'string':
        output += '    /* a->{n} = a->{n} (no-op) */\n'.format(n=o.fieldname)
    else:
        lfield = 'a->' + o.lengthfield if o.lengthfield else o.length
        if o.fieldtype in endian_strings:
            output += (forloop
                       .format(length=lfield,
                               format=endian_strings[o.fieldtype],
                               name=o.fieldname))
        else:
            output += (forloop_format
                       .format(length=lfield, type=o.fieldtype,
                               name=o.fieldname))
    return output


def endianfun_obj(o):
    output = ''
    if o.type == 'Array':
        return endianfun_array(o)
    elif o.type != 'Field':
        output += ('    s = format(s, "\\n{} {} {} (print not implemented");\n'
                   .format(o.type, o.fieldtype, o.fieldname))
        return output
    if o.fieldtype in endian_strings:
        output += ('    a->{name} = {format}(a->{name});\n'
                   .format(name=o.fieldname,
                           format=endian_strings[o.fieldtype]))
    elif o.fieldtype.startswith('vl_api_'):
        output += ('    {type}_endian(&a->{name});\n'
                   .format(type=o.fieldtype, name=o.fieldname))
    else:
        output += '    /* a->{n} = a->{n} (no-op) */\n'.format(n=o.fieldname)

    return output


def endianfun(objs, aliases, modulename):
    output = '''\

/****** Endian swap functions *****/\n\
#ifdef vl_endianfun
#ifndef included_{module}_endianfun
#define included_{module}_endianfun

#undef clib_net_to_host_uword
#ifdef LP64
#define clib_net_to_host_uword clib_net_to_host_u64
#else
#define clib_net_to_host_uword clib_net_to_host_u32
#endif

'''
    output = output.format(module=modulename)

    signature = '''\
static inline void vl_api_{name}_t_endian (vl_api_{name}_t *a)
{{
    int i __attribute__((unused));
'''

    for k, v in aliases.items():
        if v.manual_endian:
            output += "/***** manual: vl_api_%s_t_endian  *****/\n\n" % k
            continue

        output += signature.format(name=k)
        if ('length' in v.alias and v.alias['length'] and
                v.alias['type'] == 'u8'):
            output += ('    /* a->{name} = a->{name} (no-op) */\n'
                       .format(name=k))
        elif v.alias['type'] in format_strings:
            output += ('    *a = {}(*a);\n'
                       .format(endian_strings[v.alias['type']]))
        else:
            output += '    /* Not Implemented yet {} */'.format(k)
        output += '}\n\n'

    for t in objs:
        if t.__class__.__name__ == 'Enum':
            output += signature.format(name=t.name)
            if t.enumtype in endian_strings:
                output += ('    *a = {}(*a);\n'
                           .format(endian_strings[t.enumtype]))
            else:
                output += ('    /* a->{name} = a->{name} (no-op) */\n'
                           .format(name=t.name))

            output += '}\n\n'
            continue

        if t.manual_endian:
            output += "/***** manual: vl_api_%s_t_endian  *****/\n\n" % t.name
            continue

        output += signature.format(name=t.name)

        for o in t.block:
            output += endianfun_obj(o)
        output += '}\n\n'

    output += "\n#endif"
    output += "\n#endif /* vl_endianfun */\n\n"

    return output


def version_tuple(s, module):
    output = '''\
/****** Version tuple *****/

#ifdef vl_api_version_tuple

'''
    if 'version' in s['Option']:
        v = s['Option']['version']
        (major, minor, patch) = v.split('.')
        output += "vl_api_version_tuple(%s, %s, %s, %s)\n" % \
                  (module, major, minor, patch)

    output += "\n#endif /* vl_api_version_tuple */\n\n"

    return output


#
# Plugin entry point
#
def run(input_filename, s):
    stream = StringIO()
    basename = os.path.basename(input_filename)
    filename, file_extension = os.path.splitext(basename)
    modulename = filename.replace('.', '_')

    output = top_boilerplate.format(datestring=datestring,
                                    input_filename=basename)
    output += imports(s['Import'])
    output += msg_ids(s)
    output += msg_names(s)
    output += msg_name_crc_list(s, filename)
    output += typedefs(s['types'] + s['Define'], s['Alias'],
                       filename + file_extension)
    printfun_types(s['types'], s['Alias'], stream, modulename)
    printfun(s['Define'], stream, modulename)
    output += stream.getvalue()
    output += endianfun(s['types'] + s['Define'], s['Alias'],  modulename)
    output += version_tuple(s, basename)
    output += bottom_boilerplate.format(input_filename=basename,
                                        file_crc=s['file_crc'])

    return output