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Diffstat (limited to 'src/regex/tre.h')
| -rw-r--r-- | src/regex/tre.h | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/src/regex/tre.h b/src/regex/tre.h new file mode 100644 index 00000000..bfd171f4 --- /dev/null +++ b/src/regex/tre.h @@ -0,0 +1,269 @@ +/* + tre-internal.h - TRE internal definitions + + Copyright (c) 2001-2006 Ville Laurikari <vl@iki.fi>. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +*/ + +#include <regex.h> +#include <wchar.h> +#include <wctype.h> + +#define TRE_MULTIBYTE 1 +#undef TRE_MBSTATE +#define TRE_WCHAR 1 +#define TRE_USE_SYSTEM_WCTYPE 1 +#define HAVE_WCSTOMBS 1 +#define TRE_MB_CUR_MAX MB_CUR_MAX + +#define NDEBUG + +#define TRE_REGEX_T_FIELD __opaque +typedef int reg_errcode_t; + +typedef wchar_t tre_char_t; + + +#ifdef TRE_DEBUG +#include <stdio.h> +#define DPRINT(msg) do {printf msg; fflush(stdout);} while(0) +#else /* !TRE_DEBUG */ +#define DPRINT(msg) do { } while(0) +#endif /* !TRE_DEBUG */ + +#define elementsof(x) ( sizeof(x) / sizeof(x[0]) ) + +#if 1 +int __mbtowc(wchar_t *, const char *); +#define tre_mbrtowc(pwc, s, n, ps) (__mbtowc((pwc), (s))) +#else +#define tre_mbrtowc(pwc, s, n, ps) (mbtowc((pwc), (s), (n))) +#endif + +/* Wide characters. */ +typedef wint_t tre_cint_t; +#define TRE_CHAR_MAX WCHAR_MAX + +#ifdef TRE_MULTIBYTE +#define TRE_MB_CUR_MAX MB_CUR_MAX +#else /* !TRE_MULTIBYTE */ +#define TRE_MB_CUR_MAX 1 +#endif /* !TRE_MULTIBYTE */ + +#define tre_isalnum iswalnum +#define tre_isalpha iswalpha +#define tre_isblank iswblank +#define tre_iscntrl iswcntrl +#define tre_isdigit iswdigit +#define tre_isgraph iswgraph +#define tre_islower iswlower +#define tre_isprint iswprint +#define tre_ispunct iswpunct +#define tre_isspace iswspace +#define tre_isupper iswupper +#define tre_isxdigit iswxdigit + +#define tre_tolower towlower +#define tre_toupper towupper +#define tre_strlen wcslen + +/* Use system provided iswctype() and wctype(). */ +typedef wctype_t tre_ctype_t; +#define tre_isctype iswctype +#define tre_ctype wctype + +/* Returns number of bytes to add to (char *)ptr to make it + properly aligned for the type. */ +#define ALIGN(ptr, type) \ + ((((long)ptr) % sizeof(type)) \ + ? (sizeof(type) - (((long)ptr) % sizeof(type))) \ + : 0) + +#undef MAX +#undef MIN +#define MAX(a, b) (((a) >= (b)) ? (a) : (b)) +#define MIN(a, b) (((a) <= (b)) ? (a) : (b)) + +/* Define STRF to the correct printf formatter for strings. */ +#define STRF "ls" + +/* TNFA transition type. A TNFA state is an array of transitions, + the terminator is a transition with NULL `state'. */ +typedef struct tnfa_transition tre_tnfa_transition_t; + +struct tnfa_transition { + /* Range of accepted characters. */ + tre_cint_t code_min; + tre_cint_t code_max; + /* Pointer to the destination state. */ + tre_tnfa_transition_t *state; + /* ID number of the destination state. */ + int state_id; + /* -1 terminated array of tags (or NULL). */ + int *tags; + /* Assertion bitmap. */ + int assertions; + /* Assertion parameters. */ + union { + /* Character class assertion. */ + tre_ctype_t class; + /* Back reference assertion. */ + int backref; + } u; + /* Negative character class assertions. */ + tre_ctype_t *neg_classes; +}; + + +/* Assertions. */ +#define ASSERT_AT_BOL 1 /* Beginning of line. */ +#define ASSERT_AT_EOL 2 /* End of line. */ +#define ASSERT_CHAR_CLASS 4 /* Character class in `class'. */ +#define ASSERT_CHAR_CLASS_NEG 8 /* Character classes in `neg_classes'. */ +#define ASSERT_AT_BOW 16 /* Beginning of word. */ +#define ASSERT_AT_EOW 32 /* End of word. */ +#define ASSERT_AT_WB 64 /* Word boundary. */ +#define ASSERT_AT_WB_NEG 128 /* Not a word boundary. */ +#define ASSERT_BACKREF 256 /* A back reference in `backref'. */ +#define ASSERT_LAST 256 + +/* Tag directions. */ +typedef enum { + TRE_TAG_MINIMIZE = 0, + TRE_TAG_MAXIMIZE = 1 +} tre_tag_direction_t; + +/* Instructions to compute submatch register values from tag values + after a successful match. */ +struct tre_submatch_data { + /* Tag that gives the value for rm_so (submatch start offset). */ + int so_tag; + /* Tag that gives the value for rm_eo (submatch end offset). */ + int eo_tag; + /* List of submatches this submatch is contained in. */ + int *parents; +}; + +typedef struct tre_submatch_data tre_submatch_data_t; + + +/* TNFA definition. */ +typedef struct tnfa tre_tnfa_t; + +struct tnfa { + tre_tnfa_transition_t *transitions; + unsigned int num_transitions; + tre_tnfa_transition_t *initial; + tre_tnfa_transition_t *final; + tre_submatch_data_t *submatch_data; + unsigned int num_submatches; + tre_tag_direction_t *tag_directions; + int num_tags; + int end_tag; + int num_states; + int cflags; + int have_backrefs; +}; + +#if 0 +static int +tre_compile(regex_t *preg, const tre_char_t *regex, size_t n, int cflags); + +static void +tre_free(regex_t *preg); + +static void +tre_fill_pmatch(size_t nmatch, regmatch_t pmatch[], int cflags, + const tre_tnfa_t *tnfa, int *tags, int match_eo); + +static reg_errcode_t +tre_tnfa_run_parallel(const tre_tnfa_t *tnfa, const void *string, int len, + tre_str_type_t type, int *match_tags, int eflags, + int *match_end_ofs); + +static reg_errcode_t +tre_tnfa_run_parallel(const tre_tnfa_t *tnfa, const void *string, int len, + tre_str_type_t type, int *match_tags, int eflags, + int *match_end_ofs); + +static reg_errcode_t +tre_tnfa_run_backtrack(const tre_tnfa_t *tnfa, const void *string, + int len, tre_str_type_t type, int *match_tags, + int eflags, int *match_end_ofs); +#endif + +/* from tre-mem.h: */ + +#define TRE_MEM_BLOCK_SIZE 1024 + +typedef struct tre_list { + void *data; + struct tre_list *next; +} tre_list_t; + +typedef struct tre_mem_struct { + tre_list_t *blocks; + tre_list_t *current; + char *ptr; + size_t n; + int failed; + void **provided; +} *tre_mem_t; + +#define tre_mem_new_impl __tre_mem_new_impl +#define tre_mem_alloc_impl __tre_mem_alloc_impl +#define tre_mem_destroy __tre_mem_destroy + +tre_mem_t tre_mem_new_impl(int provided, void *provided_block); +void *tre_mem_alloc_impl(tre_mem_t mem, int provided, void *provided_block, + int zero, size_t size); + +/* Returns a new memory allocator or NULL if out of memory. */ +#define tre_mem_new() tre_mem_new_impl(0, NULL) + +/* Allocates a block of `size' bytes from `mem'. Returns a pointer to the + allocated block or NULL if an underlying malloc() failed. */ +#define tre_mem_alloc(mem, size) tre_mem_alloc_impl(mem, 0, NULL, 0, size) + +/* Allocates a block of `size' bytes from `mem'. Returns a pointer to the + allocated block or NULL if an underlying malloc() failed. The memory + is set to zero. */ +#define tre_mem_calloc(mem, size) tre_mem_alloc_impl(mem, 0, NULL, 1, size) + +#ifdef TRE_USE_ALLOCA +/* alloca() versions. Like above, but memory is allocated with alloca() + instead of malloc(). */ + +#define tre_mem_newa() \ + tre_mem_new_impl(1, alloca(sizeof(struct tre_mem_struct))) + +#define tre_mem_alloca(mem, size) \ + ((mem)->n >= (size) \ + ? tre_mem_alloc_impl((mem), 1, NULL, 0, (size)) \ + : tre_mem_alloc_impl((mem), 1, alloca(TRE_MEM_BLOCK_SIZE), 0, (size))) +#endif /* TRE_USE_ALLOCA */ + + +/* Frees the memory allocator and all memory allocated with it. */ +void tre_mem_destroy(tre_mem_t mem); + +#define xmalloc malloc +#define xcalloc calloc +#define xfree free +#define xrealloc realloc + +/* EOF */ |