rust_ethernet_ip/
ffi.rs

1use std::ffi::{CStr, CString};
2use std::os::raw::{c_char, c_int};
3use std::ptr;
4use std::sync::Mutex;
5use std::collections::HashMap;
6use lazy_static::lazy_static;
7use crate::EipClient;
8use crate::PlcValue;
9use crate::RUNTIME;
10
11// FFI-specific client manager using synchronous mutex
12lazy_static! {
13    static ref FFI_CLIENTS: Mutex<HashMap<i32, EipClient>> = Mutex::new(HashMap::new());
14    static ref FFI_NEXT_ID: Mutex<i32> = Mutex::new(1);
15}
16
17/// Connect to a PLC and return a client ID
18#[no_mangle]
19pub extern "C" fn eip_connect(ip_address: *const c_char) -> c_int {
20    if ip_address.is_null() {
21        return -1;
22    }
23    
24    let ip_str = match unsafe { CStr::from_ptr(ip_address) }.to_str() {
25        Ok(s) => s,
26        Err(_) => return -1,
27    };
28    
29    let client = match RUNTIME.block_on(EipClient::new(ip_str)) {
30        Ok(client) => client,
31        Err(_) => return -1,
32    };
33    
34    let client_id = {
35        let mut next_id = FFI_NEXT_ID.lock().unwrap();
36        let id = *next_id;
37        *next_id += 1;
38        id
39    };
40    
41    {
42        let mut clients = FFI_CLIENTS.lock().unwrap();
43        clients.insert(client_id, client);
44    }
45    
46    client_id
47}
48
49/// Disconnect from a PLC
50#[no_mangle]
51pub extern "C" fn eip_disconnect(client_id: c_int) -> c_int {
52    let mut clients = FFI_CLIENTS.lock().unwrap();
53    match clients.remove(&client_id) {
54        Some(_) => 0,
55        None => -1,
56    }
57}
58
59/// Read a boolean tag
60#[no_mangle]
61pub extern "C" fn eip_read_bool(client_id: c_int, tag_name: *const c_char, result: *mut c_int) -> c_int {
62    if tag_name.is_null() || result.is_null() {
63        return -1;
64    }
65    
66    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
67        Ok(s) => s,
68        Err(_) => return -1,
69    };
70    
71    let mut clients = FFI_CLIENTS.lock().unwrap();
72    match clients.get_mut(&client_id) {
73        Some(client) => {
74            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
75                Ok(PlcValue::Bool(value)) => {
76                    unsafe { *result = if value { 1 } else { 0 }; }
77                    0
78                }
79                _ => -1,
80            }
81        }
82        None => -1,
83    }
84}
85
86/// Write a boolean tag
87#[no_mangle]
88pub extern "C" fn eip_write_bool(client_id: c_int, tag_name: *const c_char, value: c_int) -> c_int {
89    if tag_name.is_null() {
90        return -1;
91    }
92    
93    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
94        Ok(s) => s,
95        Err(_) => return -1,
96    };
97    
98    let mut clients = FFI_CLIENTS.lock().unwrap();
99    match clients.get_mut(&client_id) {
100        Some(client) => {
101            let bool_value = value != 0;
102            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Bool(bool_value))) {
103                Ok(_) => 0,
104                Err(_) => -1,
105            }
106        }
107        None => -1,
108    }
109}
110
111// SINT (8-bit signed integer) operations
112#[no_mangle]
113pub extern "C" fn eip_read_sint(client_id: c_int, tag_name: *const c_char, result: *mut i8) -> c_int {
114    if tag_name.is_null() || result.is_null() {
115        return -1;
116    }
117    
118    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
119        Ok(s) => s,
120        Err(_) => return -1,
121    };
122    
123    let mut clients = FFI_CLIENTS.lock().unwrap();
124    match clients.get_mut(&client_id) {
125        Some(client) => {
126            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
127                Ok(PlcValue::Sint(value)) => {
128                    unsafe { *result = value; }
129                    0
130                }
131                _ => -1,
132            }
133        }
134        None => -1,
135    }
136}
137
138#[no_mangle]
139pub extern "C" fn eip_write_sint(client_id: c_int, tag_name: *const c_char, value: i8) -> c_int {
140    if tag_name.is_null() {
141        return -1;
142    }
143    
144    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
145        Ok(s) => s,
146        Err(_) => return -1,
147    };
148    
149    let mut clients = FFI_CLIENTS.lock().unwrap();
150    match clients.get_mut(&client_id) {
151        Some(client) => {
152            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Sint(value))) {
153                Ok(_) => 0,
154                Err(_) => -1,
155            }
156        }
157        None => -1,
158    }
159}
160
161// INT (16-bit signed integer) operations
162#[no_mangle]
163pub extern "C" fn eip_read_int(client_id: c_int, tag_name: *const c_char, result: *mut i16) -> c_int {
164    if tag_name.is_null() || result.is_null() {
165        return -1;
166    }
167    
168    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
169        Ok(s) => s,
170        Err(_) => return -1,
171    };
172    
173    let mut clients = FFI_CLIENTS.lock().unwrap();
174    match clients.get_mut(&client_id) {
175        Some(client) => {
176            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
177                Ok(PlcValue::Int(value)) => {
178                    unsafe { *result = value; }
179                    0
180                }
181                _ => -1,
182            }
183        }
184        None => -1,
185    }
186}
187
188#[no_mangle]
189pub extern "C" fn eip_write_int(client_id: c_int, tag_name: *const c_char, value: i16) -> c_int {
190    if tag_name.is_null() {
191        return -1;
192    }
193    
194    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
195        Ok(s) => s,
196        Err(_) => return -1,
197    };
198    
199    let mut clients = FFI_CLIENTS.lock().unwrap();
200    match clients.get_mut(&client_id) {
201        Some(client) => {
202            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Int(value))) {
203                Ok(_) => 0,
204                Err(_) => -1,
205            }
206        }
207        None => -1,
208    }
209}
210
211/// Read a DINT tag
212#[no_mangle]
213pub extern "C" fn eip_read_dint(client_id: c_int, tag_name: *const c_char, result: *mut c_int) -> c_int {
214    if tag_name.is_null() || result.is_null() {
215        return -1;
216    }
217    
218    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
219        Ok(s) => s,
220        Err(_) => return -1,
221    };
222    
223    let mut clients = FFI_CLIENTS.lock().unwrap();
224    match clients.get_mut(&client_id) {
225        Some(client) => {
226            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
227                Ok(PlcValue::Dint(value)) => {
228                    unsafe { *result = value; }
229                    0
230                }
231                _ => -1,
232            }
233        }
234        None => -1,
235    }
236}
237
238/// Write a DINT tag
239#[no_mangle]
240pub extern "C" fn eip_write_dint(client_id: c_int, tag_name: *const c_char, value: c_int) -> c_int {
241    if tag_name.is_null() {
242        return -1;
243    }
244    
245    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
246        Ok(s) => s,
247        Err(_) => return -1,
248    };
249    
250    let mut clients = FFI_CLIENTS.lock().unwrap();
251    match clients.get_mut(&client_id) {
252        Some(client) => {
253            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Dint(value))) {
254                Ok(_) => 0,
255                Err(_) => -1,
256            }
257        }
258        None => -1,
259    }
260}
261
262// LINT (64-bit signed integer) operations
263#[no_mangle]
264pub extern "C" fn eip_read_lint(client_id: c_int, tag_name: *const c_char, result: *mut i64) -> c_int {
265    if tag_name.is_null() || result.is_null() {
266        return -1;
267    }
268    
269    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
270        Ok(s) => s,
271        Err(_) => return -1,
272    };
273    
274    let mut clients = FFI_CLIENTS.lock().unwrap();
275    match clients.get_mut(&client_id) {
276        Some(client) => {
277            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
278                Ok(PlcValue::Lint(value)) => {
279                    unsafe { *result = value; }
280                    0
281                }
282                _ => -1,
283            }
284        }
285        None => -1,
286    }
287}
288
289#[no_mangle]
290pub extern "C" fn eip_write_lint(client_id: c_int, tag_name: *const c_char, value: i64) -> c_int {
291    if tag_name.is_null() {
292        return -1;
293    }
294    
295    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
296        Ok(s) => s,
297        Err(_) => return -1,
298    };
299    
300    let mut clients = FFI_CLIENTS.lock().unwrap();
301    match clients.get_mut(&client_id) {
302        Some(client) => {
303            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Lint(value))) {
304                Ok(_) => 0,
305                Err(_) => -1,
306            }
307        }
308        None => -1,
309    }
310}
311
312// USINT (8-bit unsigned integer) operations
313#[no_mangle]
314pub extern "C" fn eip_read_usint(client_id: c_int, tag_name: *const c_char, result: *mut u8) -> c_int {
315    if tag_name.is_null() || result.is_null() {
316        return -1;
317    }
318    
319    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
320        Ok(s) => s,
321        Err(_) => return -1,
322    };
323    
324    let mut clients = FFI_CLIENTS.lock().unwrap();
325    match clients.get_mut(&client_id) {
326        Some(client) => {
327            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
328                Ok(PlcValue::Usint(value)) => {
329                    unsafe { *result = value; }
330                    0
331                }
332                _ => -1,
333            }
334        }
335        None => -1,
336    }
337}
338
339#[no_mangle]
340pub extern "C" fn eip_write_usint(client_id: c_int, tag_name: *const c_char, value: u8) -> c_int {
341    if tag_name.is_null() {
342        return -1;
343    }
344    
345    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
346        Ok(s) => s,
347        Err(_) => return -1,
348    };
349    
350    let mut clients = FFI_CLIENTS.lock().unwrap();
351    match clients.get_mut(&client_id) {
352        Some(client) => {
353            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Usint(value))) {
354                Ok(_) => 0,
355                Err(_) => -1,
356            }
357        }
358        None => -1,
359    }
360}
361
362// UINT (16-bit unsigned integer) operations
363#[no_mangle]
364pub extern "C" fn eip_read_uint(client_id: c_int, tag_name: *const c_char, result: *mut u16) -> c_int {
365    if tag_name.is_null() || result.is_null() {
366        return -1;
367    }
368    
369    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
370        Ok(s) => s,
371        Err(_) => return -1,
372    };
373    
374    let mut clients = FFI_CLIENTS.lock().unwrap();
375    match clients.get_mut(&client_id) {
376        Some(client) => {
377            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
378                Ok(PlcValue::Uint(value)) => {
379                    unsafe { *result = value; }
380                    0
381                }
382                _ => -1,
383            }
384        }
385        None => -1,
386    }
387}
388
389#[no_mangle]
390pub extern "C" fn eip_write_uint(client_id: c_int, tag_name: *const c_char, value: u16) -> c_int {
391    if tag_name.is_null() {
392        return -1;
393    }
394    
395    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
396        Ok(s) => s,
397        Err(_) => return -1,
398    };
399    
400    let mut clients = FFI_CLIENTS.lock().unwrap();
401    match clients.get_mut(&client_id) {
402        Some(client) => {
403            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Uint(value))) {
404                Ok(_) => 0,
405                Err(_) => -1,
406            }
407        }
408        None => -1,
409    }
410}
411
412// UDINT (32-bit unsigned integer) operations
413#[no_mangle]
414pub extern "C" fn eip_read_udint(client_id: c_int, tag_name: *const c_char, result: *mut u32) -> c_int {
415    if tag_name.is_null() || result.is_null() {
416        return -1;
417    }
418    
419    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
420        Ok(s) => s,
421        Err(_) => return -1,
422    };
423    
424    let mut clients = FFI_CLIENTS.lock().unwrap();
425    match clients.get_mut(&client_id) {
426        Some(client) => {
427            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
428                Ok(PlcValue::Udint(value)) => {
429                    unsafe { *result = value; }
430                    0
431                }
432                _ => -1,
433            }
434        }
435        None => -1,
436    }
437}
438
439#[no_mangle]
440pub extern "C" fn eip_write_udint(client_id: c_int, tag_name: *const c_char, value: u32) -> c_int {
441    if tag_name.is_null() {
442        return -1;
443    }
444    
445    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
446        Ok(s) => s,
447        Err(_) => return -1,
448    };
449    
450    let mut clients = FFI_CLIENTS.lock().unwrap();
451    match clients.get_mut(&client_id) {
452        Some(client) => {
453            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Udint(value))) {
454                Ok(_) => 0,
455                Err(_) => -1,
456            }
457        }
458        None => -1,
459    }
460}
461
462// ULINT (64-bit unsigned integer) operations
463#[no_mangle]
464pub extern "C" fn eip_read_ulint(client_id: c_int, tag_name: *const c_char, result: *mut u64) -> c_int {
465    if tag_name.is_null() || result.is_null() {
466        return -1;
467    }
468    
469    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
470        Ok(s) => s,
471        Err(_) => return -1,
472    };
473    
474    let mut clients = FFI_CLIENTS.lock().unwrap();
475    match clients.get_mut(&client_id) {
476        Some(client) => {
477            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
478                Ok(PlcValue::Ulint(value)) => {
479                    unsafe { *result = value; }
480                    0
481                }
482                _ => -1,
483            }
484        }
485        None => -1,
486    }
487}
488
489#[no_mangle]
490pub extern "C" fn eip_write_ulint(client_id: c_int, tag_name: *const c_char, value: u64) -> c_int {
491    if tag_name.is_null() {
492        return -1;
493    }
494    
495    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
496        Ok(s) => s,
497        Err(_) => return -1,
498    };
499    
500    let mut clients = FFI_CLIENTS.lock().unwrap();
501    match clients.get_mut(&client_id) {
502        Some(client) => {
503            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Ulint(value))) {
504                Ok(_) => 0,
505                Err(_) => -1,
506            }
507        }
508        None => -1,
509    }
510}
511
512/// Read a REAL tag
513#[no_mangle]
514pub extern "C" fn eip_read_real(client_id: c_int, tag_name: *const c_char, result: *mut f64) -> c_int {
515    if tag_name.is_null() || result.is_null() {
516        return -1;
517    }
518    
519    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
520        Ok(s) => s,
521        Err(_) => return -1,
522    };
523    
524    let mut clients = FFI_CLIENTS.lock().unwrap();
525    match clients.get_mut(&client_id) {
526        Some(client) => {
527            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
528                Ok(PlcValue::Real(value)) => {
529                    unsafe { *result = value as f64; }
530                    0
531                }
532                _ => -1,
533            }
534        }
535        None => -1,
536    }
537}
538
539/// Write a REAL tag
540#[no_mangle]
541pub extern "C" fn eip_write_real(client_id: c_int, tag_name: *const c_char, value: f64) -> c_int {
542    if tag_name.is_null() {
543        return -1;
544    }
545    
546    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
547        Ok(s) => s,
548        Err(_) => return -1,
549    };
550    
551    let mut clients = FFI_CLIENTS.lock().unwrap();
552    match clients.get_mut(&client_id) {
553        Some(client) => {
554            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Real(value as f32))) {
555                Ok(_) => 0,
556                Err(_) => -1,
557            }
558        }
559        None => -1,
560    }
561}
562
563// LREAL (64-bit double precision) operations
564#[no_mangle]
565pub extern "C" fn eip_read_lreal(client_id: c_int, tag_name: *const c_char, result: *mut f64) -> c_int {
566    if tag_name.is_null() || result.is_null() {
567        return -1;
568    }
569    
570    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
571        Ok(s) => s,
572        Err(_) => return -1,
573    };
574    
575    let mut clients = FFI_CLIENTS.lock().unwrap();
576    match clients.get_mut(&client_id) {
577        Some(client) => {
578            match RUNTIME.block_on(client.read_tag(tag_name_str)) {
579                Ok(PlcValue::Lreal(value)) => {
580                    unsafe { *result = value; }
581                    0
582                }
583                _ => -1,
584            }
585        }
586        None => -1,
587    }
588}
589
590#[no_mangle]
591pub extern "C" fn eip_write_lreal(client_id: c_int, tag_name: *const c_char, value: f64) -> c_int {
592    if tag_name.is_null() {
593        return -1;
594    }
595    
596    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
597        Ok(s) => s,
598        Err(_) => return -1,
599    };
600    
601    let mut clients = FFI_CLIENTS.lock().unwrap();
602    match clients.get_mut(&client_id) {
603        Some(client) => {
604            match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::Lreal(value))) {
605                Ok(_) => 0,
606                Err(_) => -1,
607            }
608        }
609        None => -1,
610    }
611}
612
613/// Read a STRING tag
614#[no_mangle]
615pub extern "C" fn eip_read_string(client_id: c_int, tag_name: *const c_char, result: *mut c_char, max_length: c_int) -> c_int {
616    if tag_name.is_null() || result.is_null() || max_length <= 0 {
617        return -1;
618    }
619    
620    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
621        Ok(s) => s,
622        Err(_) => return -1,
623    };
624    
625    let mut clients = FFI_CLIENTS.lock().unwrap();
626    let client = match clients.get_mut(&client_id) {
627        Some(client) => client,
628        None => return -1,
629    };
630    
631    let value = match RUNTIME.block_on(client.read_tag(tag_name_str)) {
632        Ok(PlcValue::String(value)) => value,
633        Ok(_) => return -1, // Wrong data type
634        Err(_) => return -1, // Error reading tag
635    };
636    
637    let c_string = match CString::new(value) {
638        Ok(s) => s,
639        Err(_) => return -1,
640    };
641    
642    let bytes = c_string.as_bytes_with_nul();
643    if bytes.len() > max_length as usize {
644        return -1; // String too long
645    }
646    
647    unsafe {
648        ptr::copy_nonoverlapping(bytes.as_ptr(), result as *mut u8, bytes.len());
649    }
650    0
651}
652
653/// Write a STRING tag
654#[no_mangle]
655pub extern "C" fn eip_write_string(client_id: c_int, tag_name: *const c_char, value: *const c_char) -> c_int {
656    if tag_name.is_null() || value.is_null() {
657        return -1;
658    }
659    
660    let tag_name_str = match unsafe { CStr::from_ptr(tag_name) }.to_str() {
661        Ok(s) => s,
662        Err(_) => return -1,
663    };
664    
665    let value_str = match unsafe { CStr::from_ptr(value) }.to_str() {
666        Ok(s) => s,
667        Err(_) => return -1,
668    };
669    
670    let mut clients = FFI_CLIENTS.lock().unwrap();
671    let client = match clients.get_mut(&client_id) {
672        Some(client) => client,
673        None => return -1,
674    };
675    
676    match RUNTIME.block_on(client.write_tag(tag_name_str, PlcValue::String(value_str.to_string()))) {
677        Ok(_) => 0,
678        Err(_) => -1,
679    }
680}
681
682// UDT operations
683#[no_mangle]
684pub extern "C" fn eip_read_udt(client_id: c_int, tag_name: *const c_char, result: *mut c_char, max_size: c_int) -> c_int {
685    // For now, return error - UDT support can be added later
686    -1
687}
688
689#[no_mangle]
690pub extern "C" fn eip_write_udt(client_id: c_int, tag_name: *const c_char, value: *const c_char, size: c_int) -> c_int {
691    // For now, return error - UDT support can be added later
692    -1
693}
694
695// Tag discovery and metadata
696#[no_mangle]
697pub extern "C" fn eip_discover_tags(client_id: c_int) -> c_int {
698    // Return success for now - can implement tag discovery later
699    0
700}
701
702#[no_mangle]
703pub extern "C" fn eip_get_tag_metadata(client_id: c_int, tag_name: *const c_char, metadata: *mut u8) -> c_int {
704    // For now, return error - metadata support can be added later
705    -1
706}
707
708// Configuration
709#[no_mangle]
710pub extern "C" fn eip_set_max_packet_size(client_id: c_int, size: c_int) -> c_int {
711    // Return success for now - packet size configuration can be added later
712    0
713}
714
715// Health checks
716#[no_mangle]
717pub extern "C" fn eip_check_health(client_id: c_int, is_healthy: *mut c_int) -> c_int {
718    if is_healthy.is_null() {
719        return -1;
720    }
721    
722    let clients = FFI_CLIENTS.lock().unwrap();
723    match clients.get(&client_id) {
724        Some(_) => {
725            unsafe { *is_healthy = 1; }
726            0
727        }
728        None => {
729            unsafe { *is_healthy = 0; }
730            -1
731        }
732    }
733}
734
735#[no_mangle]
736pub extern "C" fn eip_check_health_detailed(client_id: c_int, is_healthy: *mut c_int) -> c_int {
737    // Use the same logic as basic health check for now
738    eip_check_health(client_id, is_healthy)
739}
740
741// Batch operations implementation
742#[no_mangle]
743pub extern "C" fn eip_read_tags_batch(client_id: c_int, tag_names: *mut *const c_char, tag_count: c_int, results: *mut c_char, results_capacity: c_int) -> c_int {
744    if tag_names.is_null() || results.is_null() || tag_count <= 0 {
745        return -1;
746    }
747
748    let mut clients = FFI_CLIENTS.lock().unwrap();
749    let client = match clients.get_mut(&client_id) {
750        Some(client) => client,
751        None => return -1,
752    };
753
754    // Convert C strings to Rust strings
755    let mut tag_name_strs = Vec::new();
756    unsafe {
757        for i in 0..tag_count {
758            let tag_name_ptr = *tag_names.offset(i as isize);
759            if tag_name_ptr.is_null() {
760                return -1;
761            }
762            let tag_name = match CStr::from_ptr(tag_name_ptr).to_str() {
763                Ok(s) => s,
764                Err(_) => return -1,
765            };
766            tag_name_strs.push(tag_name);
767        }
768    }
769
770    // Execute batch read
771    let batch_results = RUNTIME.block_on(async {
772        client.read_tags_batch(&tag_name_strs).await
773    });
774
775    let results_data = match batch_results {
776        Ok(results) => {
777            // Simple format: "tag1:value1;tag2:value2;..."
778            let mut formatted = String::new();
779            for (i, (tag_name, result)) in results.iter().enumerate() {
780                if i > 0 {
781                    formatted.push(';');
782                }
783                formatted.push_str(tag_name);
784                formatted.push(':');
785                match result {
786                    Ok(value) => formatted.push_str(&format!("{:?}", value)),
787                    Err(e) => formatted.push_str(&format!("ERROR:{}", e)),
788                }
789            }
790            formatted
791        }
792        Err(_) => return -1,
793    };
794
795    // Copy results to output buffer
796    let results_bytes = results_data.as_bytes();
797    if results_bytes.len() >= results_capacity as usize {
798        return -1;
799    }
800
801    unsafe {
802        std::ptr::copy_nonoverlapping(results_bytes.as_ptr(), results as *mut u8, results_bytes.len());
803        *results.offset(results_bytes.len() as isize) = 0; // Null terminate
804    }
805
806    0
807}
808
809#[no_mangle]
810pub extern "C" fn eip_write_tags_batch(client_id: c_int, tag_values: *const c_char, tag_count: c_int, results: *mut c_char, results_capacity: c_int) -> c_int {
811    if tag_values.is_null() || results.is_null() || tag_count <= 0 {
812        return -1;
813    }
814
815    let mut clients = FFI_CLIENTS.lock().unwrap();
816    let _client = match clients.get_mut(&client_id) {
817        Some(client) => client,
818        None => return -1,
819    };
820
821    // Parse input (simplified implementation)
822    let _input_str = unsafe {
823        match CStr::from_ptr(tag_values).to_str() {
824            Ok(s) => s,
825            Err(_) => return -1,
826        }
827    };
828
829    // For now, return not implemented
830    // TODO: Parse input and execute batch write
831    let results_data = "ERROR:Batch write not yet implemented in FFI";
832    let results_bytes = results_data.as_bytes();
833    
834    if results_bytes.len() >= results_capacity as usize {
835        return -1;
836    }
837
838    unsafe {
839        std::ptr::copy_nonoverlapping(results_bytes.as_ptr(), results as *mut u8, results_bytes.len());
840        *results.offset(results_bytes.len() as isize) = 0; // Null terminate
841    }
842
843    0
844}
845
846#[no_mangle]
847pub extern "C" fn eip_execute_batch(client_id: c_int, operations: *const c_char, operation_count: c_int, results: *mut c_char, results_capacity: c_int) -> c_int {
848    if operations.is_null() || results.is_null() || operation_count <= 0 {
849        return -1;
850    }
851
852    let mut clients = FFI_CLIENTS.lock().unwrap();
853    let _client = match clients.get_mut(&client_id) {
854        Some(client) => client,
855        None => return -1,
856    };
857
858    // Parse input (simplified implementation)
859    let _input_str = unsafe {
860        match CStr::from_ptr(operations).to_str() {
861            Ok(s) => s,
862            Err(_) => return -1,
863        }
864    };
865
866    // For now, return not implemented
867    // TODO: Parse input and execute mixed batch operations
868    let results_data = "ERROR:Mixed batch operations not yet implemented in FFI";
869    let results_bytes = results_data.as_bytes();
870    
871    if results_bytes.len() >= results_capacity as usize {
872        return -1;
873    }
874
875    unsafe {
876        std::ptr::copy_nonoverlapping(results_bytes.as_ptr(), results as *mut u8, results_bytes.len());
877        *results.offset(results_bytes.len() as isize) = 0; // Null terminate
878    }
879
880    0
881}
882
883#[no_mangle]
884pub extern "C" fn eip_configure_batch_operations(client_id: c_int, config: *const u8) -> c_int {
885    0 // Return success for now
886}
887
888#[no_mangle]
889pub extern "C" fn eip_get_batch_config(client_id: c_int, config: *mut u8) -> c_int {
890    -1 // Not implemented yet
891}
rust_ethernet_ip/ffi.rs

rust_ethernet_ip/
ffi.rs
