osprey/kg++fe/gnu/cpplex.c File Reference

#include "config.h"
#include "system.h"
#include "cpplib.h"
#include "cpphash.h"

Include dependency graph for cpplex.c:

Go to the source code of this file.

Data Types

type  token_spelling

Defines

#define OP(e, s)   { SPELL_OPERATOR, U s },
#define TK(e, s)   { s, U STRINGX (e) },
#define TOKEN_SPELL(token)   (token_spellings[(token)->type].category)
#define TOKEN_NAME(token)   (token_spellings[(token)->type].name)
#define BACKUP()   do {buffer->cur = buffer->backup_to;} while (0)
#define IF_NEXT_IS(CHAR, THEN_TYPE, ELSE_TYPE)
#define MIN_BUFF_SIZE   8000
#define BUFF_SIZE_UPPER_BOUND(MIN_SIZE)   (MIN_BUFF_SIZE + (MIN_SIZE) * 3 / 2)
#define EXTENDED_BUFF_SIZE(BUFF, MIN_EXTRA)   (MIN_EXTRA + ((BUFF)->limit - (BUFF)->cur) * 2)

Enumerations

enum  spell_type {
  SPELL_OPERATOR = 0, SPELL_CHAR, SPELL_IDENT, SPELL_NUMBER,
  SPELL_STRING, SPELL_NONE, SPELL_OPERATOR = 0, SPELL_CHAR,
  SPELL_IDENT, SPELL_NUMBER, SPELL_STRING, SPELL_NONE,
  SPELL_OPERATOR = 0, SPELL_IDENT, SPELL_LITERAL, SPELL_NONE,
  SPELL_OPERATOR = 0, SPELL_IDENT, SPELL_LITERAL, SPELL_NONE
}

Functions/Subroutines

static void handle_newline PARAMS ((cpp_reader *))
static int skip_whitespace PARAMS ((cpp_reader *, cppchar_t))
static uchar *parse_slow PARAMS ((cpp_reader *, const uchar *, int, unsigned int *))
static void parse_number PARAMS ((cpp_reader *, cpp_string *, int))
static int unescaped_terminator_p PARAMS ((cpp_reader *, const uchar *))
static void parse_string PARAMS ((cpp_reader *, cpp_token *, cppchar_t))
static void save_comment PARAMS ((cpp_reader *, cpp_token *, const uchar *, cppchar_t))
static int name_p PARAMS ((cpp_reader *, const cpp_string *))
static int maybe_read_ucs PARAMS ((cpp_reader *, const unsigned char **, const unsigned char *, cppchar_t *))
static tokenrun *next_tokenrun PARAMS ((tokenrun *))
static unsigned int hex_digit_value PARAMS ((unsigned int))
static _cpp_buff *new_buff PARAMS ((size_t))
int cpp_ideq (cpp_token *token, const char *string) const
static void handle_newline (cpp_reader *pfile)
static bool trigraph_p (cpp_reader *pfile)
static cppchar_t skip_escaped_newlines (cpp_reader *pfile)
static cppchar_t get_effective_char (cpp_reader *pfile)
static int skip_block_comment (cpp_reader *pfile)
static int skip_line_comment (cpp_reader *pfile)
static void adjust_column (cpp_reader *pfile)
static int skip_whitespace (cpp_reader *pfile, cppchar_t c)
static int name_p (cpp_reader *pfile, const cpp_string *string)
static cpp_hashnode * parse_identifier (cpp_reader *pfile)
static uchar * parse_slow (cpp_reader *pfile, const uchar *cur, int number_p, unsigned int *plen)
static void parse_number (cpp_reader *pfile, cpp_string *number, int leading_period)
static int unescaped_terminator_p (cpp_reader *pfile, const unsigned char *dest)
static void parse_string (cpp_reader *pfile, cpp_token *token, cppchar_t terminator)
static void save_comment (cpp_reader *pfile, cpp_token *token, const unsigned char *from, cppchar_t type)
void _cpp_init_tokenrun (tokenrun *run, unsigned int count)
static tokenrun * next_tokenrun (tokenrun *run)
cpp_token * _cpp_temp_token (cpp_reader *pfile)
const cpp_token * _cpp_lex_token (cpp_reader *pfile)
static bool continue_after_nul (cpp_reader *pfile)
cpp_token * _cpp_lex_direct (cpp_reader *pfile)
unsigned int cpp_token_len (cpp_token *token) const
unsigned char * cpp_spell_token (cpp_reader *pfile, const cpp_token *token, unsigned char *buffer)
unsigned char * cpp_token_as_text (cpp_reader *pfile, const cpp_token *token)
const char * cpp_type2name (enum cpp_ttype type)
void cpp_output_token (cpp_token *token, FILE *fp) const
int _cpp_equiv_tokens (cpp_token *a, cpp_token *b) const
int cpp_avoid_paste (cpp_reader *pfile, const cpp_token *token1, const cpp_token *token2)
void cpp_output_line (cpp_reader *pfile, FILE *fp)
static unsigned int hex_digit_value (unsigned int c)
static int maybe_read_ucs (cpp_reader *pfile, const unsigned char **pstr, const unsigned char *limit, cppchar_t *pc)
cppchar_t cpp_parse_escape (cpp_reader *pfile, const unsigned char **pstr, const unsigned char *limit, int wide)
cppchar_t cpp_interpret_charconst (cpp_reader *pfile, const cpp_token *token, unsigned int *pchars_seen, int *unsignedp)
static _cpp_buff * new_buff (size_t len)
void _cpp_release_buff (cpp_reader *pfile, _cpp_buff *buff)
_cpp_buff * _cpp_get_buff (cpp_reader *pfile, size_t min_size)
_cpp_buff * _cpp_append_extend_buff (cpp_reader *pfile, _cpp_buff *buff, size_t min_extra)
void _cpp_extend_buff (cpp_reader *pfile, _cpp_buff **pbuff, size_t min_extra)
void _cpp_free_buff (_cpp_buff *buff)
unsigned char * _cpp_unaligned_alloc (cpp_reader *pfile, size_t len)
unsigned char * _cpp_aligned_alloc (cpp_reader *pfile, size_t len)

Variables

static const unsigned char *const digraph_spellings []
static struct token_spelling token_spellings [N_TTYPES] = { TTYPE_TABLE }

Define Documentation

 
#define BACKUP (  )     do {buffer->cur = buffer->backup_to;} while (0)

Definition at line 71 of file cpplex.c.

Referenced by _cpp_lex_direct(), and parse_slow().

#define BUFF_SIZE_UPPER_BOUND ( MIN_SIZE   )     (MIN_BUFF_SIZE + (MIN_SIZE) * 3 / 2)

Definition at line 2176 of file cpplex.c.

Referenced by _cpp_get_buff().

#define EXTENDED_BUFF_SIZE ( BUFF,
MIN_EXTRA   )     (MIN_EXTRA + ((BUFF)->limit - (BUFF)->cur) * 2)

Definition at line 2177 of file cpplex.c.

Referenced by _cpp_append_extend_buff(), and _cpp_extend_buff().

#define IF_NEXT_IS ( CHAR,
THEN_TYPE,
ELSE_TYPE   ) 

Value:

do {            \
    if (get_effective_char (pfile) == CHAR) \
      result->type = THEN_TYPE;     \
    else          \
      {           \
        BACKUP ();        \
        result->type = ELSE_TYPE;   \
      }           \
  } while (0)

Definition at line 1075 of file cpplex.c.

Referenced by _cpp_lex_direct().

#define MIN_BUFF_SIZE   8000

Definition at line 2175 of file cpplex.c.

Referenced by new_buff().

#define OP ( e,
s   )     { SPELL_OPERATOR, U s },

Definition at line 63 of file cpplex.c.

#define TK ( e,
s   )     { s, U STRINGX (e) },

Definition at line 64 of file cpplex.c.

#define TOKEN_NAME ( token   )     (token_spellings[(token)->type].name)

Definition at line 70 of file cpplex.c.

Referenced by cpp_output_token(), and cpp_spell_token().

#define TOKEN_SPELL ( token   )     (token_spellings[(token)->type].category)

Definition at line 69 of file cpplex.c.

Referenced by _cpp_equiv_tokens(), cpp_output_token(), cpp_spell_token(), cpp_token_len(), and cpp_token_val_index().

Enumeration Type Documentation

enum spell_type

Enumerator:
SPELL_OPERATOR 
SPELL_CHAR 
SPELL_IDENT 
SPELL_NUMBER 
SPELL_STRING 
SPELL_NONE 
SPELL_OPERATOR 
SPELL_CHAR 
SPELL_IDENT 
SPELL_NUMBER 
SPELL_STRING 
SPELL_NONE 
SPELL_OPERATOR 
SPELL_IDENT 
SPELL_LITERAL 
SPELL_NONE 
SPELL_OPERATOR 
SPELL_IDENT 
SPELL_LITERAL 
SPELL_NONE 

Definition at line 44 of file cpplex.c.

Function Documentation

unsigned char* _cpp_aligned_alloc ( cpp_reader *  pfile,
size_t  len 
)

Definition at line 2332 of file cpplex.c.

Referenced by _cpp_create_definition(), insert_pragma_entry(), and new_pragma_entry().

_cpp_buff* _cpp_append_extend_buff ( cpp_reader *  pfile,
_cpp_buff *  buff,
size_t  min_extra 
)

Definition at line 2253 of file cpplex.c.

Referenced by collect_args().

int _cpp_equiv_tokens ( cpp_token *  a,
cpp_token *  b 
) const

Definition at line 1703 of file cpplex.c.

References memcmp, SPELL_CHAR, SPELL_IDENT, SPELL_NONE, SPELL_NUMBER, SPELL_OPERATOR, SPELL_STRING, and TOKEN_SPELL.

Referenced by find_answer(), and warn_of_redefinition().

void _cpp_extend_buff ( cpp_reader *  pfile,
_cpp_buff **  pbuff,
size_t  min_extra 
)

Definition at line 2272 of file cpplex.c.

Referenced by _cpp_save_parameter(), alloc_expansion_token(), parse_answer(), parse_string(), save_replacement_text(), and stringify_arg().

void _cpp_free_buff ( _cpp_buff *  buff  ) 

Definition at line 2288 of file cpplex.c.

_cpp_buff* _cpp_get_buff ( cpp_reader *  pfile,
size_t  min_size 
)

Definition at line 2222 of file cpplex.c.

Referenced by _cpp_aligned_alloc(), _cpp_append_extend_buff(), _cpp_extend_buff(), _cpp_unaligned_alloc(), collect_args(), maybe_start_funlike(), replace_args(), replace_args_and_push(), and stringify_arg().

void _cpp_init_tokenrun ( tokenrun *  run,
unsigned int  count 
)

Definition at line 791 of file cpplex.c.

Referenced by next_tokenrun().

cpp_token* _cpp_lex_direct ( cpp_reader *  pfile  ) 

Definition at line 1098 of file cpplex.c.

Referenced by _cpp_lex_token(), builtin_macro(), lex_expansion_token(), and paste_tokens().

const cpp_token* _cpp_lex_token ( cpp_reader *  pfile  ) 

Definition at line 931 of file cpplex.c.

Referenced by _cpp_handle_directive(), check_eol(), check_eol_return_comments(), cpp_get_token(), create_iso_definition(), do_pragma_poison(), lex_macro_node(), parse_params(), read_flag(), and skip_rest_of_line().

void _cpp_release_buff ( cpp_reader *  pfile,
_cpp_buff *  buff 
)

Definition at line 2208 of file cpplex.c.

Referenced by _cpp_pop_context(), _cpp_scan_out_logical_line(), collect_args(), enter_macro_context(), maybe_start_funlike(), scan_out_logical_line(), and stringify_arg().

cpp_token* _cpp_temp_token ( cpp_reader *  pfile  ) 

Definition at line 820 of file cpplex.c.

Referenced by builtin_macro(), cpp_get_token(), glue_header_name(), new_string_token(), padding_token(), paste_tokens(), and replace_args().

unsigned char* _cpp_unaligned_alloc ( cpp_reader *  pfile,
size_t  len 
)

Definition at line 2302 of file cpplex.c.

Referenced by _cpp_builtin_macro_text(), cpp_token_as_text(), create_literal(), dequote_string(), do_pragma(), glue_header_name(), lex_number(), parse_number(), push_replacement_text(), save_comment(), and save_replacement_text().

static void adjust_column ( cpp_reader *  pfile  )  [static]

Definition at line 371 of file cpplex.c.

References col, cpp_buffer::col_adjust, CPP_BUF_COL, and CPP_OPTION.

Referenced by skip_block_comment(), and skip_whitespace().

static bool continue_after_nul ( cpp_reader *  pfile  )  [static]

Definition at line 1029 of file cpplex.c.

References _cpp_overlay_buffer(), _cpp_pop_buffer(), _cpp_read_logical_line_trad(), _cpp_remove_overlay(), BOL, cpp_error(), CPP_OPTION, cpp_buffer::cur, DL_PEDWARN, cpp_buffer::from_stage3, handle_newline(), cpp_buffer::line_base, cpp_buffer::prev, cpp_buffer::return_at_eof, and cpp_buffer::saved_flags.

Referenced by _cpp_lex_direct().

int cpp_avoid_paste ( cpp_reader *  pfile,
const cpp_token *  token1,
const cpp_token *  token2 
)

Definition at line 1733 of file cpplex.c.

Referenced by scan_translation_unit().

int cpp_ideq ( cpp_token *  token,
const char *  string 
) const

Definition at line 104 of file cpplex.c.

References NODE_NAME, uchar, and ustrcmp().

Referenced by read_scan_file(), recognized_extern(), and scan_decls().

cppchar_t cpp_interpret_charconst ( cpp_reader *  pfile,
const cpp_token *  token,
unsigned int *  pchars_seen,
int *  unsignedp 
)

Definition at line 2057 of file cpplex.c.

Referenced by eval_token(), and lex_charconst().

void cpp_output_line ( cpp_reader *  pfile,
FILE *  fp 
)

Definition at line 1788 of file cpplex.c.

Referenced by cb_def_pragma(), and do_diagnostic().

void cpp_output_token ( cpp_token *  token,
FILE *  fp 
) const

Definition at line 1635 of file cpplex.c.

References CPP_FIRST_DIGRAPH, DIGRAPH, digraph_spellings, fprintf(), fwrite, int, NAMED_OP, NODE_LEN, NODE_NAME, putc(), SPELL_CHAR, SPELL_IDENT, SPELL_NONE, SPELL_NUMBER, SPELL_OPERATOR, SPELL_STRING, tag, TOKEN_NAME, and TOKEN_SPELL.

Referenced by cb_include(), cpp_output_line(), and scan_translation_unit().

cppchar_t cpp_parse_escape ( cpp_reader *  pfile,
const unsigned char **  pstr,
const unsigned char *  limit,
int  wide 
)

Definition at line 1912 of file cpplex.c.

Referenced by cpp_interpret_charconst(), dequote_string(), and lex_string().

unsigned char* cpp_spell_token ( cpp_reader *  pfile,
const cpp_token *  token,
unsigned char *  buffer 
)

Definition at line 1535 of file cpplex.c.

Referenced by c_lex_with_flags(), cpp_macro_definition(), cpp_token_as_text(), glue_header_name(), paste_tokens(), stringify_arg(), and warn_about_normalization().

unsigned char* cpp_token_as_text ( cpp_reader *  pfile,
const cpp_token *  token 
)

Definition at line 1609 of file cpplex.c.

Referenced by _cpp_handle_directive(), _cpp_parse_expr(), cb_def_pragma(), cb_include(), check_promotion(), do_line(), do_linemarker(), do_pragma_dependency(), parse_defined(), parse_params(), paste_all_tokens(), paste_tokens(), and read_flag().

unsigned int cpp_token_len ( cpp_token *  token  )  const

Definition at line 1514 of file cpplex.c.

References NODE_LEN, SPELL_IDENT, SPELL_NUMBER, SPELL_STRING, and TOKEN_SPELL.

Referenced by cpp_macro_definition(), cpp_token_as_text(), glue_header_name(), paste_tokens(), stringify_arg(), and warn_about_normalization().

const char* cpp_type2name ( enum cpp_ttype  type  ) 

Definition at line 1625 of file cpplex.c.

Referenced by c_parse_error().

static cppchar_t get_effective_char ( cpp_reader *  pfile  )  [static]

Definition at line 252 of file cpplex.c.

References __builtin_expect, cpp_buffer::backup_to, cpp_buffer::cur, next, and skip_escaped_newlines().

Referenced by _cpp_lex_direct().

static void handle_newline ( cpp_reader *  pfile  )  [static]

Definition at line 122 of file cpplex.c.

References cpp_buffer::col_adjust, cpp_buffer::cur, and cpp_buffer::line_base.

Referenced by _cpp_lex_direct(), continue_after_nul(), copy_comment(), scan_out_logical_line(), skip_block_comment(), and skip_escaped_newlines().

static unsigned int hex_digit_value ( unsigned int  c  )  [static]

Definition at line 1808 of file cpplex.c.

References abort, hex_p, and hex_value.

Referenced by cpp_parse_escape(), and maybe_read_ucs().

static int maybe_read_ucs ( cpp_reader *  pfile,
const unsigned char **  pstr,
const unsigned char *  limit,
cppchar_t *  pc 
) [static]

Definition at line 1840 of file cpplex.c.

References cpp_error(), CPP_OPTION, CPP_WTRADITIONAL, DL_ERROR, DL_WARNING, hex_digit_value(), ISXDIGIT, length, and p.

Referenced by cpp_parse_escape().

static int name_p ( cpp_reader *  pfile,
const cpp_string *  string 
) [static]

Definition at line 430 of file cpplex.c.

References i, is_idchar, and cpp_string::text.

static _cpp_buff* new_buff ( size_t  len  )  [static]

Definition at line 2187 of file cpplex.c.

References _cpp_buff::base, base, CPP_ALIGN, _cpp_buff::cur, _cpp_buff::limit, MIN_BUFF_SIZE, _cpp_buff::next, NULL, and xmalloc().

Referenced by _cpp_append_extend_buff(), _cpp_extend_buff(), and _cpp_get_buff().

static tokenrun* next_tokenrun ( tokenrun *  run  )  [static]

Definition at line 802 of file cpplex.c.

References _cpp_init_tokenrun(), tokenrun::next, NULL, and xnew.

Referenced by _cpp_lex_token(), and _cpp_temp_token().

static _cpp_buff* new_buff PARAMS ( (size_t)   )  [static]

static unsigned int hex_digit_value PARAMS ( (unsigned int)   )  [static]

static tokenrun* next_tokenrun PARAMS ( (tokenrun *)   )  [static]

static int maybe_read_ucs PARAMS ( (cpp_reader *, const unsigned char **, const unsigned char *, cppchar_t *)   )  [static]

static int name_p PARAMS ( (cpp_reader *, const cpp_string *)   )  [static]

static void save_comment PARAMS ( (cpp_reader *, cpp_token *, const uchar *, cppchar_t)   )  [static]

static void parse_string PARAMS ( (cpp_reader *, cpp_token *, cppchar_t)   )  [static]

static int unescaped_terminator_p PARAMS ( (cpp_reader *, const uchar *)   )  [static]

static void parse_number PARAMS ( (cpp_reader *, cpp_string *, int)   )  [static]

static uchar* parse_slow PARAMS ( (cpp_reader *, const uchar *, int, unsigned int *)   )  [static]

static int skip_whitespace PARAMS ( (cpp_reader *, cppchar_t)   )  [static]

static void handle_newline PARAMS ( (cpp_reader *)   )  [static]

static cpp_hashnode* parse_identifier ( cpp_reader *  pfile  )  [static]

Definition at line 452 of file cpplex.c.

References __builtin_expect, base, cpp_error(), cur, DL_ERROR, DL_PEDWARN, cpp_hashnode::flags, HT_ALLOC, HT_ALLOCED, ht_lookup(), ISIDNUM, len, NODE_DIAGNOSTIC, NODE_NAME, NODE_POISONED, parse_slow(), result, and uchar.

Referenced by _cpp_lex_direct().

static void parse_number ( cpp_reader *  pfile,
cpp_string *  number,
int  leading_period 
) [static]

Definition at line 580 of file cpplex.c.

References _cpp_unaligned_alloc(), base, cur, dest, ISIDNUM, cpp_string::len, memcpy, parse_slow(), cpp_string::text, uchar, and VALID_SIGN.

Referenced by _cpp_lex_direct().

static uchar* parse_slow ( cpp_reader *  pfile,
const uchar *  cur,
int  number_p,
unsigned int *  plen 
) [static]

Definition at line 509 of file cpplex.c.

References BACKUP, cpp_buffer::backup_to, base, c, cpp_error(), CPP_PEDANTIC, cpp_buffer::cur, DL_PEDWARN, is_idchar, obstack_1grow, obstack_finish, obstack_grow, obstack_object_size, skip_escaped_newlines(), stack, uchar, and VALID_SIGN.

Referenced by parse_identifier(), and parse_number().

static void parse_string ( cpp_reader *  pfile,
cpp_token *  token,
cppchar_t  terminator 
) [static]

Definition at line 643 of file cpplex.c.

References _cpp_extend_buff(), BUFF_FRONT, BUFF_LIMIT, c, CLK_ASM, cpp_error(), CPP_OPTION, cpp_buffer::cur, dest, DL_ERROR, DL_WARNING, is_vspace, cpp_string::len, NULL, cpp_buffer::rlimit, skip_escaped_newlines(), cpp_token::str, cpp_string::text, unescaped_terminator_p(), cpp_token::val, and void.

Referenced by _cpp_lex_direct().

static void save_comment ( cpp_reader *  pfile,
cpp_token *  token,
const unsigned char *  from,
cppchar_t  type 
) [static]

Definition at line 747 of file cpplex.c.

References _cpp_unaligned_alloc(), is_vspace, len, cpp_string::len, memcpy, cpp_token::str, cpp_string::text, and cpp_token::val.

Referenced by _cpp_lex_direct().

static int skip_block_comment ( cpp_reader *  pfile  )  [static]

Definition at line 270 of file cpplex.c.

References adjust_column(), c, CPP_BUF_COL, cpp_error_with_line(), CPP_OPTION, cpp_buffer::cur, DL_WARNING, EOF, handle_newline(), is_vspace, cpp_buffer::rlimit, skip_escaped_newlines(), and warn_comments.

Referenced by _cpp_lex_direct().

static cppchar_t skip_escaped_newlines ( cpp_reader *  pfile  )  [static]

Definition at line 182 of file cpplex.c.

References _cpp_trigraph_map, cpp_buffer::backup_to, cpp_error(), cpp_buffer::cur, DL_PEDWARN, DL_WARNING, EOF, cpp_buffer::from_stage3, handle_newline(), is_nvspace, is_vspace, next, cpp_buffer::rlimit, and trigraph_p().

Referenced by _cpp_lex_direct(), get_effective_char(), lex_identifier(), parse_slow(), parse_string(), scan_out_logical_line(), skip_block_comment(), skip_line_comment(), and skip_whitespace().

static int skip_line_comment ( cpp_reader *  pfile  )  [static]

Definition at line 316 of file cpplex.c.

References at_eof, c, cpp_error(), cpp_buffer::cur, DL_WARNING, is_vspace, NULL, cpp_buffer::rlimit, skip_escaped_newlines(), and void.

Referenced by _cpp_lex_direct().

static int skip_whitespace ( cpp_reader *  pfile,
cppchar_t  c 
) [static]

Definition at line 387 of file cpplex.c.

References adjust_column(), CPP_BUF_COL, cpp_error(), cpp_error_with_line(), CPP_PEDANTIC, cpp_buffer::cur, DL_PEDWARN, DL_WARNING, is_nvspace, and cpp_buffer::rlimit.

Referenced by _cpp_create_trad_definition(), _cpp_lex_direct(), _cpp_scan_out_logical_line(), read_specs(), scan_out_logical_line(), and scan_parameters().

static bool trigraph_p ( cpp_reader *  pfile  )  [static]

Definition at line 144 of file cpplex.c.

References _cpp_trigraph_map, CPP_BUF_COL, cpp_error_with_line(), CPP_OPTION, cpp_buffer::cur, DL_WARNING, and cpp_buffer::last_Wtrigraphs.

Referenced by skip_escaped_newlines().

static int unescaped_terminator_p ( cpp_reader *  pfile,
const unsigned char *  dest 
) [static]

Definition at line 615 of file cpplex.c.

References BUFF_FRONT, start, and obstack::temp.

Referenced by parse_string().

Variable Documentation

const unsigned char* const digraph_spellings[] [static]

Initial value:

{ U"%:", U"%:%:", U"<:", U":>", U"<%", U"%>" }

Definition at line 60 of file cpplex.c.

Referenced by cpp_avoid_paste(), cpp_output_token(), and cpp_spell_token().

struct token_spelling token_spellings[N_TTYPES] = { TTYPE_TABLE } [static]

Definition at line 65 of file cpplex.c.

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