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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "internal.h"
#include "rccconfig.h"
#include "rccexternal.h"
#include "rccmutex.h"
#include "rcctranslate.h"
#define RCC_TRANSLATE_DEFAULT_TIMEOUT 1000000 /* 1s */
int rccTranslateInit() {
return 0;
}
void rccTranslateFree() {
}
rcc_translate rccTranslateOpen(const char *from, const char *to) {
#ifdef HAVE_LIBTRANSLATE
rcc_translate translate;
if ((!from)||(!to)||(!strcasecmp(from,to))) return NULL;
if ((strlen(from)!=2)||(strlen(to)!=2)) return NULL;
translate = (rcc_translate)malloc(sizeof(rcc_translate_s));
if (!translate) return NULL;
translate->mutex = rccMutexCreate();
translate->wmutex = rccMutexCreate();
if ((!translate->mutex)||(!translate->wmutex)) {
if (translate->mutex) rccMutexFree(translate->mutex);
if (translate->wmutex) rccMutexFree(translate->wmutex);
free(translate);
return NULL;
}
translate->sock = rccExternalConnect(RCC_EXTERNAL_MODULE_LIBRTRANSLATE);
if (translate->sock == -1) {
rccMutexFree(translate->mutex);
rccMutexFree(translate->wmutex);
free(translate);
return NULL;
}
translate->remaining = 0;
translate->werror = 0;
translate->prefix.cmd.cmd = RCC_EXTERNAL_COMMAND_TRANSLATE;
translate->prefix.cmd.size = sizeof(rcc_translate_prefix_s);
memcpy(translate->prefix.from, from, 3*sizeof(char));
memcpy(translate->prefix.to, to, 3*sizeof(char));
translate->wprefix.cmd.cmd = RCC_EXTERNAL_COMMAND_TRANSLATE_QUEUE;
translate->wprefix.cmd.size = sizeof(rcc_translate_prefix_s);
memcpy(translate->wprefix.from, from, 3*sizeof(char));
memcpy(translate->wprefix.to, to, 3*sizeof(char));
rccTranslateSetTimeout(translate, RCC_TRANSLATE_DEFAULT_TIMEOUT);
return translate;
#else
return NULL;
#endif /* HAVE_LIBTRANSLATE */
}
void rccTranslateClose(rcc_translate translate) {
#ifdef HAVE_LIBTRANSLATE
if (!translate) return;
if (translate->sock != -1) rccExternalClose(translate->sock);
rccMutexFree(translate->mutex);
rccMutexFree(translate->wmutex);
free(translate);
#endif /* HAVE_LIBTRANSLATE */
}
int rccTranslateSetTimeout(rcc_translate translate, unsigned long us) {
if (!translate) return -1;
translate->prefix.timeout = us;
return 0;
}
#define RCC_UNLOCK_W 1
#define RCC_UNLOCK_R 2
#define RCC_UNLOCK_RW 3
#define RCC_UNLOCK_WR 3
static char *rccTranslateReturn(rcc_translate translate, char *ret, int unlock) {
if (unlock&RCC_UNLOCK_R) rccMutexUnLock(translate->mutex);
if (unlock&RCC_UNLOCK_W) rccMutexUnLock(translate->wmutex);
return ret;
}
#define rccTranslateReturnNULL(translate, unlock) rccTranslateReturn(translate, NULL, unlock)
static int rccTranslateQueue(rcc_translate translate, const char *buf) {
size_t len, err;
len = strlen(buf);
translate->wprefix.cmd.size = sizeof(rcc_translate_prefix_s) + len - sizeof(rcc_external_command_s);
err = rccExternalWrite(translate->sock, (char*)&translate->wprefix, sizeof(rcc_translate_prefix_s) - 1, 0);
if (!err) err = rccExternalWrite(translate->sock, buf, len + 1, 0);
return err?1:0;
}
char *rccTranslate(rcc_translate translate, const char *buf) {
#ifdef HAVE_LIBTRANSLATE
rcc_external_command_s resp;
size_t err, len;
char *buffer;
size_t i;
if ((!translate)||(!buf)) return NULL;
if (!strcmp(translate->prefix.to, rcc_english_language_sn)) {
for (i=0;buf[i];i++) {
if ((unsigned char)buf[i]>0x7F) break;
if ((buf[i]>='A')&&(buf[i]<='Z')) break;
if ((buf[i]>='a')&&(buf[i]<='z')) break;
}
if (!buf[i]) return NULL;
}
rccMutexLock(translate->wmutex);
if (rccMutexTryLock(translate->mutex)) {
if ((translate->werror)||(translate->sock == -1)) return rccTranslateReturnNULL(translate,RCC_UNLOCK_W);
if (rccTranslateQueue(translate, buf)) translate->werror = 1;
return rccTranslateReturnNULL(translate, RCC_UNLOCK_W);
}
if (translate->werror) {
rccExternalClose(translate->sock);
translate->sock = -1;
translate->werror = 0;
}
if (translate->sock == -1) {
translate->sock = rccExternalConnect(RCC_EXTERNAL_MODULE_LIBRTRANSLATE);
if (translate->sock == -1) {
return rccTranslateReturnNULL(translate,RCC_UNLOCK_RW);
} else {
translate->werror = 0;
translate->remaining = 0;
}
} else if (translate->remaining) {
if (translate->remaining == (size_t)-1) {
err = rccExternalRead(translate->sock, (char*)&resp, sizeof(rcc_external_command_s), 0);
if (err) {
if (err == sizeof(rcc_external_command_s)) {
if (rccTranslateQueue(translate, buf)) {
rccExternalClose(translate->sock);
translate->sock = -1;
}
} else {
rccExternalClose(translate->sock);
translate->sock = -1;
}
return rccTranslateReturnNULL(translate,RCC_UNLOCK_RW);
}
translate->remaining = resp.size;
}
buffer = (char*)malloc(translate->remaining*sizeof(char));
if (!buffer) {
rccExternalClose(translate->sock);
translate->sock = -1;
return rccTranslateReturnNULL(translate,RCC_UNLOCK_RW);
}
err = rccExternalRead(translate->sock, buffer, translate->remaining, 0);
free(buffer);
if (err) {
translate->remaining = err;
if (rccTranslateQueue(translate, buf)) {
rccExternalClose(translate->sock);
translate->sock = -1;
}
return rccTranslateReturnNULL(translate,RCC_UNLOCK_RW);
}
translate->remaining = 0;
}
len = strlen(buf);
translate->prefix.cmd.size = sizeof(rcc_translate_prefix_s) + len - sizeof(rcc_external_command_s);
err = rccExternalWrite(translate->sock, (char*)&translate->prefix, sizeof(rcc_translate_prefix_s) - 1, 0);
if (err) {
rccExternalClose(translate->sock);
translate->sock = -1;
return rccTranslateReturnNULL(translate,RCC_UNLOCK_RW);
}
err = rccExternalWrite(translate->sock, buf, len + 1, 0);
if (err) {
rccExternalClose(translate->sock);
translate->sock = -1;
return rccTranslateReturnNULL(translate,RCC_UNLOCK_RW);
}
rccMutexUnLock(translate->wmutex);
err = rccExternalRead(translate->sock, (char*)&resp, sizeof(rcc_external_command_s), translate->prefix.timeout);
if (err) {
if (err == sizeof(rcc_external_command_s)) {
translate->remaining = (size_t)-1;
} else {
rccMutexLock(translate->wmutex);
rccExternalClose(translate->sock);
translate->sock = -1;
rccMutexUnLock(translate->wmutex);
}
return rccTranslateReturnNULL(translate,RCC_UNLOCK_R);
}
if ((resp.cmd!=RCC_EXTERNAL_COMMAND_TRANSLATE)||(!resp.size))
return rccTranslateReturnNULL(translate,RCC_UNLOCK_R);
buffer = (char*)malloc(resp.size*sizeof(char));
if (!buffer) {
rccMutexLock(translate->wmutex);
rccExternalClose(translate->sock);
translate->sock = -1;
rccMutexUnLock(translate->wmutex);
return rccTranslateReturnNULL(translate,RCC_UNLOCK_R);
}
err = rccExternalRead(translate->sock, buffer, resp.size, 0);
if (err) {
translate->remaining = err;
free(buffer);
return rccTranslateReturnNULL(translate,RCC_UNLOCK_R);
}
return rccTranslateReturn(translate, buffer, RCC_UNLOCK_R);
#else
return NULL;
#endif /* HAVE_LIBTRANSLATE */
}
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