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#include <stdio.h>
#include <string.h>
#include "internal.h"
#include "plugin.h"
#include "rccconfig.h"
#include "rccenca.h"
#include "engine.h"
#ifdef RCC_RCD_SUPPORT
# ifdef RCC_RCD_DYNAMIC
# include "fake_rcd.h"
# else
# include <librcd.h>
# endif /* RCC_RCD_DYNAMIC */
#endif /* RCC_RCD_SUPPORT */
#ifdef RCC_RCD_DYNAMIC
static rcc_library_handle rcd_handle = NULL;
#endif /* RCC_RCD_DYNAMIC */
rcc_autocharset_id rccAutoengineRussian(rcc_engine_context ctx, const char *buf, int len) {
#ifdef RCC_RCD_SUPPORT
# ifdef RCC_RCD_DYNAMIC
if (!rcdGetRussianCharset) return (rcc_charset_id)-1;
# endif /* RCC_RCD_DYNAMIC */
return (rcc_charset_id)rcdGetRussianCharset(buf,len);
#else /* RCC_RCD_SUPPORT */
return (rcc_charset_id)-1;
#endif /* RCC_RCD_SUPPORT */
}
#ifdef RCC_RCD_DYNAMIC
static int rccRCDLibraryLoad() {
if (rcd_handle) return 0;
rcd_handle = rccLibraryOpen(RCC_RCD_LIB);
if (!rcd_handle) return -1;
rcdGetRussianCharset = rccLibraryFind(rcd_handle,"rcdGetRussianCharset");
if (!rcdGetRussianCharset) {
rccLibraryClose(rcd_handle);
rcd_handle = NULL;
# ifdef RCC_DEBUG
perror( "rccRCD. Incomplete function set in library" );
# endif /* RCC_DEBUG */
return -1;
}
return 0;
}
#endif /* RCC_RCD_DYNAMIC */
#ifdef RCC_RCD_DYNAMIC
static void rccRCDLibraryUnload() {
if (rcd_handle) {
rccLibraryClose(rcd_handle);
rcd_handle = NULL;
}
}
#endif /* RCC_RCD_DYNAMIC */
int rccEngineInit() {
#ifdef RCC_RCD_DYNAMIC
int err;
unsigned int i,j,flag;
rcc_engine **engines;
int *charsets;
err = rccRCDLibraryLoad();
if (err) {
for (i=0;rcc_default_languages[i].sn;i++) {
engines = rcc_default_languages[i].engines;
for (flag=0,j=0;engines[j];j++) {
if (flag) engines[j-1] = engines[j];
else if (engines[j] == &rcc_russian_engine) flag=1;
}
if (flag) engines[j-1] = NULL;
}
}
#endif /* RCC_RCD_DYNAMIC */
return rccEncaInit();
}
void rccEngineFree() {
rccEncaFree();
#ifdef RCC_RCD_DYNAMIC
rccRCDLibraryUnload();
#endif /* RCC_RCD_DYNAMIC */
}
int rccEngineInitContext(rcc_engine_context engine_ctx, rcc_language_config config) {
if ((!config)||(!engine_ctx)) return -1;
engine_ctx->config = config;
engine_ctx->free_func = NULL;
engine_ctx->func = NULL;
return 0;
}
void rccEngineFreeContext(rcc_engine_context engine_ctx) {
if (!engine_ctx) return;
if (engine_ctx->free_func) {
engine_ctx->free_func(engine_ctx);
engine_ctx->free_func = NULL;
}
engine_ctx->func = NULL;
engine_ctx->internal = NULL;
}
int rccEngineConfigure(rcc_engine_context ctx) {
rcc_engine_id engine_id;
rcc_engine *engine;
if ((!ctx)||(!ctx->config)) return -1;
rccEngineFreeContext(ctx);
engine_id = rccConfigGetCurrentEngine(ctx->config);
if (engine_id == (rcc_engine_id)-1) return -1;
engine = ctx->config->language->engines[engine_id];
ctx->free_func = engine->free_func;
ctx->func = engine->func;
if (engine->init_func) ctx->internal = engine->init_func(ctx);
else ctx->internal = NULL;
return 0;
}
rcc_engine_internal rccEngineGetInternal(rcc_engine_context ctx) {
if (!ctx) return NULL;
return ctx->internal;
}
rcc_language *rccEngineGetLanguage(rcc_engine_context ctx) {
if (!ctx) return NULL;
return ctx->config->language;
}
rcc_context rccEngineGetRccContext(rcc_engine_context ctx) {
if (!ctx) return NULL;
return ctx->config->ctx;
}
#define bit(i) (1<<i)
static int CheckWestern(const unsigned char *buf, int len) {
long i,j;
int bytes=0;
if (!len) len = strlen(buf);
for (i=0;i<len;i++) {
if (bytes>0) {
// Western is 0x100-0x17e
if ((buf[i]&0xC0)==0x80) bytes--;
else return 0;
} else {
if (buf[i]<128) continue;
for (j=6;j>=0;j--)
if ((buf[i]&bit(j))==0) break;
if ((j==0)||(j==6)) return 0;
bytes=6-j;
if (bytes==1) {
// Western Languages (C2-C3)
if ((buf[i]!=0xC2)&&(buf[i]!=0xC3)) return 0;
} else return 0;
}
}
return 1;
}
rcc_autocharset_id rccEngineDetectCharset(rcc_engine_context ctx, const char *buf, size_t len) {
rcc_autocharset_id utf;
if (CheckWestern(buf, len)) {
utf=rccConfigGetAutoCharsetByName(ctx->config, "UTF-8");
if (utf != (rcc_autocharset_id)-1) return utf;
utf=rccConfigGetAutoCharsetByName(ctx->config, "UTF8");
if (utf != (rcc_autocharset_id)-1) return utf;
utf=rccConfigGetAutoCharsetByName(ctx->config, "UTF_8");
return utf;
}
if ((ctx)&&(ctx->func)) return ctx->func(ctx, buf, len);
return (rcc_autocharset_id)-1;
}
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