diff options
Diffstat (limited to 'src/rccenca.c')
| -rw-r--r-- | src/rccenca.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/src/rccenca.c b/src/rccenca.c new file mode 100644 index 0000000..d01e3d8 --- /dev/null +++ b/src/rccenca.c @@ -0,0 +1,177 @@ +#include <stdio.h> + +#include "internal.h" +#include "plugin.h" +#include "engine.h" +#include "rccconfig.h" + +#include "rccenca.h" +#ifdef RCC_ENCA_SUPPORT +# ifdef RCC_ENCA_DYNAMIC +# include "fake_enca.h" +# else +# include <enca.h> +# endif /* RCC_ENCA_DYNAMIC */ +#endif /* RCC_ENCA_SUPPORT */ + +static rcc_library_handle enca_handle = NULL; +static rcc_engine *enca_engines = NULL; + +rcc_engine_internal rccEncaInitContext(rcc_engine_context ctx) { +#ifdef RCC_ENCA_SUPPORT + EncaAnalyser enca; + + if ((!ctx)||(!ctx->language)) return NULL; + + enca = enca_analyser_alloc(ctx->language->sn); + if (!enca) return NULL; + + enca_set_threshold(enca, 1); + enca_set_multibyte(enca, 1); + enca_set_ambiguity(enca, 1); + enca_set_garbage_test(enca, 0); + enca_set_filtering(enca, 0); + enca_set_significant(enca,1); + enca_set_termination_strictness(enca,0); + + return (rcc_engine_internal)enca; +#else /* RCC_ENCA_SUPPORT */ + return NULL; +#endif /* RCC_ENCA_SUPPORT */ +} + +void rccEncaFreeContext(rcc_engine_context ctx) { + rcc_engine_internal internal; +#ifdef RCC_ENCA_SUPPORT + internal = rccEngineGetInternal(ctx); + if (internal) + enca_analyser_free(internal); +#endif /* RCC_ENCA_SUPPORT */ +} + +rcc_charset_id rccEnca(rcc_engine_context ctx, char *buf, int len) { +#ifdef RCC_ENCA_SUPPORT + rcc_engine_internal internal; + const char *charset; + EncaEncoding ee; + + internal = rccEngineGetInternal(ctx); + if ((!internal)||(!buf)) return -1; + + + len = STRLEN(buf, len); + + ee = enca_analyse_const((EncaAnalyser)ctx->internal,buf,len); + if (ee.charset<0) return -1; + + charset = enca_charset_name(ee.charset, ENCA_NAME_STYLE_ICONV); + return rccGetAutoCharsetByName(ctx->ctx, charset); +#else /* RCC_ENCA_SUPPORT */ + return -1; +#endif /* RCC_ENCA_SUPPORT */ +} + +rcc_engine rcc_enca_engine = { + "Enca Library", &rccEncaInitContext, &rccEncaFreeContext, &rccEnca, {"UTF-8", NULL} +}; + + +static int rccEncaLibraryLoad() { +#ifdef RCC_ENCA_DYNAMIC + if (enca_handle) return 0; + + enca_handle = rccLibraryOpen(RCC_ENCA_LIB); + if (!enca_handle) return -1; + + enca_set_multibyte=rccLibraryFind(enca_handle,"enca_set_multibyte"); + enca_set_interpreted_surfaces=rccLibraryFind(enca_handle,"enca_set_interpreted_surfaces"); + enca_set_ambiguity=rccLibraryFind(enca_handle,"enca_set_ambiguity"); + enca_set_filtering=rccLibraryFind(enca_handle,"enca_set_filtering"); + enca_set_garbage_test=rccLibraryFind(enca_handle,"enca_set_garbage_test"); + enca_set_termination_strictness=rccLibraryFind(enca_handle,"enca_set_termination_strictness"); + enca_set_significant=rccLibraryFind(enca_handle,"enca_set_significant"); + enca_set_threshold=rccLibraryFind(enca_handle,"enca_set_threshold"); + enca_charset_name=rccLibraryFind(enca_handle,"enca_charset_name"); + enca_get_language_charsets=rccLibraryFind(enca_handle,"enca_get_language_charsets"); + enca_analyser_alloc=rccLibraryFind(enca_handle,"enca_analyser_alloc"); + enca_analyser_free=rccLibraryFind(enca_handle,"enca_analyser_free"); + enca_analyse_const=rccLibraryFind(enca_handle,"enca_analyse_const"); + + if ((!enca_set_multibyte)||(!enca_set_interpreted_surfaces)||(!enca_set_ambiguity)|| + (!enca_set_filtering)||(!enca_set_garbage_test)||(!enca_set_termination_strictness)|| + (!enca_set_significant)||(!enca_set_threshold)||(!enca_charset_name)|| + (!enca_get_language_charsets)||(!enca_analyser_alloc)||(!enca_analyser_free)|| + (!enca_analyse_const)) { + rccLibraryClose(enca_handle); + enca_handle = NULL; +# ifdef RCC_DEBUG + perror( "rccEnca. Incomplete function set in library" ); +# endif /* RCC_DEBUG */ + } + +#endif /* RCC_ENCA_DYNAMIC */ + return 0; +} + +static void rccEncaLibraryUnload() { +#ifdef RCC_ENCA_DYNAMIC + if (enca_handle) { + rccLibraryUnload(enca_handle); + enca_handle = NULL; + } +#endif /* RCC_ENCA_DYNAMIC */ +} + +int rccEncaInit() { + int err; + unsigned int i,j,k,l; + + rcc_engine **engines; + + int *charsets; + size_t n_charsets; + +#ifdef RCC_ENCA_SUPPORT + if (enca_engines) return -1; + for (i=0;rcc_default_languages[i].sn;i++); + enca_engines = (rcc_engine*)malloc(i*sizeof(rcc_engine)); + if (!enca_engines) return -1; + + err = rccEncaLibraryLoad(); + if (err) return err; + + for (i=0;rcc_default_languages[i].sn;i++) { + engines = rcc_default_languages[i].engines; + for (j=0;engines[j];j++) + if (j >= RCC_MAX_ENGINES) continue; + + charsets = enca_get_language_charsets(rcc_default_languages[i].sn, &n_charsets); + if (charsets) { + memcpy(enca_engines+i, &rcc_enca_engine, sizeof(rcc_engine)); + for (k=0;enca_engines[i].charsets[k];k++); + if (n_charsets+k>=RCC_MAX_CHARSETS) n_charsets = RCC_MAX_CHARSETS-k; + + for (l=0;l<n_charsets;l++) + enca_engines[j].charsets[k++] = enca_charset_name(charsets[l], ENCA_NAME_STYLE_ICONV); + enca_engines[j].charsets[k] = NULL; + + engines[j] = enca_engines + i; + engines[j+1] = NULL; + + free(charsets); + } + } +#endif /* RCC_ENCA_SUPPORT */ + + return 0; +} + +void rccEncaFree() { +#ifdef RCC_ENCA_SUPPORT + rccEncaLibraryUnload(); + if (enca_engines) { + free(enca_engines); + enca_engines = NULL; + } +#endif /* RCC_ENCA_SUPPORT */ +} |