Asterisk - The Open Source Telephony Project
21.4.1
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Dialplan Expression Lexical Scanner. More...
#include "asterisk.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#include <locale.h>
#include <ctype.h>
#include <regex.h>
#include <limits.h>
#include "asterisk/ast_expr.h"
#include "asterisk/logger.h"
#include "asterisk/strings.h"
#include "asterisk/channel.h"
#include "ast_expr2.h"
#include <unistd.h>
Go to the source code of this file.
Data Structures | |
struct | parse_io |
struct | val |
struct | yy_buffer_state |
struct | yy_trans_info |
struct | yyguts_t |
Macros | |
#define | ast_yywrap(n) 1 |
#define | ASTMM_LIBC ASTMM_REDIRECT |
#define | BEGIN yyg->yy_start = 1 + 2 * |
#define | ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0) |
#define | EOB_ACT_CONTINUE_SCAN 0 |
#define | EOB_ACT_END_OF_FILE 1 |
#define | EOB_ACT_LAST_MATCH 2 |
#define | FLEX_BETA |
#define | FLEX_SCANNER |
#define | FLEXINT_H |
#define | FP___FMOD fmod |
#define | FP___PRINTF "%.16g" |
#define | FP___STRTOD strtod |
#define | FP___TYPE double |
#define | INITIAL 0 |
#define | INT16_MAX (32767) |
#define | INT16_MIN (-32767-1) |
#define | INT32_MAX (2147483647) |
#define | INT32_MIN (-2147483647-1) |
#define | INT8_MAX (127) |
#define | INT8_MIN (-128) |
#define | REJECT reject_used_but_not_detected |
#define | SET_COLUMNS |
#define | SET_NUMERIC_STRING |
#define | SET_STRING |
#define | trail 2 |
#define | UINT16_MAX (65535U) |
#define | UINT32_MAX (4294967295U) |
#define | UINT8_MAX (255U) |
#define | unput(c) yyunput( c, yyg->yytext_ptr , yyscanner ) |
#define | var 1 |
#define | YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol) |
#define | YY_BREAK break; |
#define | YY_BUF_SIZE 16384 |
#define | YY_BUFFER_EOF_PENDING 2 |
#define | YY_BUFFER_NEW 0 |
#define | YY_BUFFER_NORMAL 1 |
#define | YY_CURRENT_BUFFER |
#define | YY_CURRENT_BUFFER_LVALUE yyg->yy_buffer_stack[yyg->yy_buffer_stack_top] |
#define | YY_DECL |
#define | YY_DECL_IS_OURS 1 |
#define | YY_DO_BEFORE_ACTION |
#define | YY_END_OF_BUFFER 39 |
#define | YY_END_OF_BUFFER_CHAR 0 |
#define | YY_EXIT_FAILURE 2 |
#define | YY_EXTRA_TYPE void * |
#define | YY_FATAL_ERROR(msg) yy_fatal_error( msg , yyscanner) |
#define | yy_flex_debug yyg->yy_flex_debug_r |
#define | YY_FLEX_MAJOR_VERSION 2 |
#define | YY_FLEX_MINOR_VERSION 5 |
#define | YY_FLEX_SUBMINOR_VERSION 35 |
#define | YY_FLUSH_BUFFER ast_yy_flush_buffer(YY_CURRENT_BUFFER ,yyscanner) |
#define | YY_INPUT(buf, result, max_size) |
#define | YY_INT_ALIGNED short int |
#define | YY_LESS_LINENO(n) |
#define | YY_MORE_ADJ yyg->yy_more_len |
#define | yy_new_buffer ast_yy_create_buffer |
#define | YY_NEW_FILE ast_yyrestart(yyin ,yyscanner ) |
#define | YY_NULL 0 |
#define | YY_NUM_RULES 38 |
#define | YY_READ_BUF_SIZE 8192 |
#define | YY_RESTORE_YY_MORE_OFFSET |
#define | YY_RULE_SETUP YY_USER_ACTION |
#define | YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c) |
#define | yy_set_bol(at_bol) |
#define | yy_set_interactive(is_interactive) |
#define | YY_SKIP_YYWRAP |
#define | YY_START ((yyg->yy_start - 1) / 2) |
#define | YY_START_STACK_INCR 25 |
#define | YY_STATE_BUF_SIZE ((YY_BUF_SIZE + 2) * sizeof(yy_state_type)) |
#define | YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1) |
#define | YY_STRUCT_YY_BUFFER_STATE |
#define | YY_TYPEDEF_YY_BUFFER_STATE |
#define | YY_TYPEDEF_YY_SCANNER_T |
#define | YY_TYPEDEF_YY_SIZE_T |
#define | YY_USER_ACTION |
#define | yycolumn (YY_CURRENT_BUFFER_LVALUE->yy_bs_column) |
#define | yyconst |
#define | yyextra yyg->yyextra_r |
#define | yyin yyg->yyin_r |
#define | yyleng yyg->yyleng_r |
#define | yyless(n) |
#define | yyless(n) |
#define | yylineno (YY_CURRENT_BUFFER_LVALUE->yy_bs_lineno) |
#define | yylloc yyg->yylloc_r |
#define | yylval yyg->yylval_r |
#define | yymore() (yyg->yy_more_flag = 1) |
#define | yyout yyg->yyout_r |
#define | YYSTATE YY_START |
#define | YYTABLES_NAME "yytables" |
#define | yyterminate() return YY_NULL |
#define | yytext yyg->yytext_r |
#define | yytext_ptr yytext_r |
Typedefs | |
typedef short int | flex_int16_t |
typedef int | flex_int32_t |
typedef signed char | flex_int8_t |
typedef unsigned short int | flex_uint16_t |
typedef unsigned int | flex_uint32_t |
typedef unsigned char | flex_uint8_t |
typedef struct yy_buffer_state * | YY_BUFFER_STATE |
typedef unsigned char | YY_CHAR |
typedef size_t | yy_size_t |
typedef int | yy_state_type |
typedef void * | yyscan_t |
Functions | |
int | ast_expr (char *expr, char *buf, int length, struct ast_channel *chan) |
Evaluate the given expression. More... | |
void | ast_expr_clear_extra_error_info (void) |
void | ast_expr_register_extra_error_info (char *message) |
int | ast_str_expr (struct ast_str **str, ssize_t maxlen, struct ast_channel *chan, char *expr) |
Evaluate the given expression. More... | |
YY_BUFFER_STATE | ast_yy_create_buffer (FILE *file, int size, yyscan_t yyscanner) |
void | ast_yy_delete_buffer (YY_BUFFER_STATE b, yyscan_t yyscanner) |
void | ast_yy_flush_buffer (YY_BUFFER_STATE b, yyscan_t yyscanner) |
static void | ast_yy_init_buffer (YY_BUFFER_STATE b, FILE *file, yyscan_t yyscanner) |
static void | ast_yy_load_buffer_state (yyscan_t yyscanner) |
YY_BUFFER_STATE | ast_yy_scan_buffer (char *base, yy_size_t size, yyscan_t yyscanner) |
YY_BUFFER_STATE | ast_yy_scan_bytes (yyconst char *bytes, int len, yyscan_t yyscanner) |
YY_BUFFER_STATE | ast_yy_scan_string (yyconst char *yy_str, yyscan_t yyscanner) |
void | ast_yy_switch_to_buffer (YY_BUFFER_STATE new_buffer, yyscan_t yyscanner) |
void * | ast_yyalloc (yy_size_t, yyscan_t yyscanner) |
static void | ast_yyensure_buffer_stack (yyscan_t yyscanner) |
int | ast_yyerror (const char *, YYLTYPE *, struct parse_io *) |
int | ast_yyerror (const char *s, yyltype *loc, struct parse_io *parseio) |
void | ast_yyfree (void *, yyscan_t yyscanner) |
int | ast_yyget_column (yyscan_t yyscanner) |
int | ast_yyget_debug (yyscan_t yyscanner) |
YY_EXTRA_TYPE | ast_yyget_extra (yyscan_t yyscanner) |
FILE * | ast_yyget_in (yyscan_t yyscanner) |
int | ast_yyget_leng (yyscan_t yyscanner) |
int | ast_yyget_lineno (yyscan_t yyscanner) |
YYLTYPE * | ast_yyget_lloc (yyscan_t yyscanner) |
YYSTYPE * | ast_yyget_lval (yyscan_t yyscanner) |
FILE * | ast_yyget_out (yyscan_t yyscanner) |
char * | ast_yyget_text (yyscan_t yyscanner) |
int | ast_yylex (YYSTYPE *yylval_param, YYLTYPE *yylloc_param, yyscan_t yyscanner) |
int | ast_yylex_destroy (yyscan_t yyscanner) |
int | ast_yylex_init (yyscan_t *scanner) |
int | ast_yylex_init_extra (YY_EXTRA_TYPE user_defined, yyscan_t *scanner) |
int | ast_yyparse (void *) |
void | ast_yypop_buffer_state (yyscan_t yyscanner) |
void | ast_yypush_buffer_state (YY_BUFFER_STATE new_buffer, yyscan_t yyscanner) |
void * | ast_yyrealloc (void *, yy_size_t, yyscan_t yyscanner) |
void | ast_yyrestart (FILE *input_file, yyscan_t yyscanner) |
void | ast_yyset_column (int column_no, yyscan_t yyscanner) |
void | ast_yyset_debug (int debug_flag, yyscan_t yyscanner) |
void | ast_yyset_extra (YY_EXTRA_TYPE user_defined, yyscan_t yyscanner) |
void | ast_yyset_in (FILE *in_str, yyscan_t yyscanner) |
void | ast_yyset_lineno (int line_number, yyscan_t yyscanner) |
void | ast_yyset_lloc (YYLTYPE *yylloc_param, yyscan_t yyscanner) |
void | ast_yyset_lval (YYSTYPE *yylval_param, yyscan_t yyscanner) |
void | ast_yyset_out (FILE *out_str, yyscan_t yyscanner) |
static char * | expr2_token_subst (const char *mess) |
if (!yyg->yy_init) | |
static int | input (yyscan_t yyscanner) |
int | isatty (int) |
while (1) | |
static void | yy_fatal_error (yyconst char msg[], yyscan_t yyscanner) |
static void | yy_fatal_error (yyconst char *msg, yyscan_t yyscanner) |
static int | yy_get_next_buffer (yyscan_t yyscanner) |
static yy_state_type | yy_get_previous_state (yyscan_t yyscanner) |
static int | yy_init_globals (yyscan_t yyscanner) |
static yy_state_type | yy_try_NUL_trans (yy_state_type current_state, yyscan_t yyscanner) |
static void | yyunput (int c, char *buf_ptr, yyscan_t yyscanner) |
static void | yyunput (int c, register char *yy_bp, yyscan_t yyscanner) |
Variables | |
static int | curlycount = 0 |
static const char *const | expr2_token_equivs1 [] |
static const char *const | expr2_token_equivs2 [] |
char | extra_error_message [4095] |
int | extra_error_message_supplied = 0 |
static yyconst flex_int16_t | yy_accept [63] |
register int | yy_act |
static yyconst flex_int16_t | yy_base [70] |
register char * | yy_bp |
static yyconst flex_int16_t | yy_chk [159] |
register char * | yy_cp |
YY_DECL | |
static yyconst flex_int16_t | yy_def [70] |
static yyconst flex_int32_t | yy_ec [256] |
static yyconst flex_int32_t | yy_meta [29] |
static yyconst flex_int16_t | yy_nxt [159] |
struct yyguts_t * | yyg = (struct yyguts_t*)yyscanner |
yylloc = yylloc_param | |
yylval = yylval_param | |
Dialplan Expression Lexical Scanner.
Definition in file main/ast_expr2f.c.
#define SET_COLUMNS |
Definition at line 571 of file main/ast_expr2f.c.
#define SET_NUMERIC_STRING |
Definition at line 583 of file main/ast_expr2f.c.
#define SET_STRING |
Definition at line 577 of file main/ast_expr2f.c.
#define YY_CURRENT_BUFFER |
Definition at line 274 of file main/ast_expr2f.c.
#define YY_DECL |
Definition at line 817 of file main/ast_expr2f.c.
int ast_expr | ( | char * | expr, |
char * | buf, | ||
int | length, | ||
struct ast_channel * | chan | ||
) |
Evaluate the given expression.
expr | An expression |
buf | Result buffer |
length | Size of the result buffer, in bytes |
chan | Channel to use for evaluating included dialplan functions, if any |
Definition at line 2391 of file main/ast_expr2f.c.
References ast_copy_string(), and ast_yy_scan_string().
int ast_str_expr | ( | struct ast_str ** | str, |
ssize_t | maxlen, | ||
struct ast_channel * | chan, | ||
char * | expr | ||
) |
Evaluate the given expression.
str | Dynamic result buffer |
maxlen | <0 if the size of the buffer should remain constant, >0 if the size of the buffer should expand to that many bytes, maximum, or 0 for unlimited expansion of the result buffer |
chan | Channel to use for evaluating included dialplan functions, if any |
expr | An expression |
Definition at line 2433 of file main/ast_expr2f.c.
References ast_str_set(), ast_str_strlen(), and ast_yy_scan_string().
YY_BUFFER_STATE ast_yy_create_buffer | ( | FILE * | file, |
int | size, | ||
yyscan_t | yyscanner | ||
) |
Allocate and initialize an input buffer state.
file | A readable stream. |
size | The character buffer size in bytes. When in doubt, use YY_BUF_SIZE . |
yyscanner | The scanner object. |
Definition at line 1711 of file main/ast_expr2f.c.
Referenced by ast_yyrestart().
void ast_yy_delete_buffer | ( | YY_BUFFER_STATE | b, |
yyscan_t | yyscanner | ||
) |
Destroy the buffer.
b | a buffer created with ast_yy_create_buffer() |
yyscanner | The scanner object. |
Definition at line 1739 of file main/ast_expr2f.c.
Referenced by ast_yypop_buffer_state().
void ast_yy_flush_buffer | ( | YY_BUFFER_STATE | b, |
yyscan_t | yyscanner | ||
) |
Discard all buffered characters. On the next scan, YY_INPUT will be called.
b | the buffer state to be flushed, usually YY_CURRENT_BUFFER . |
yyscanner | The scanner object. |
Definition at line 1792 of file main/ast_expr2f.c.
YY_BUFFER_STATE ast_yy_scan_buffer | ( | char * | base, |
yy_size_t | size, | ||
yyscan_t | yyscanner | ||
) |
Setup the input buffer state to scan directly from a user-specified character buffer.
base | the character buffer |
size | the size in bytes of the character buffer |
yyscanner | The scanner object. |
Definition at line 1923 of file main/ast_expr2f.c.
References ast_yy_switch_to_buffer().
Referenced by ast_yy_scan_bytes().
YY_BUFFER_STATE ast_yy_scan_bytes | ( | yyconst char * | yybytes, |
int | _yybytes_len, | ||
yyscan_t | yyscanner | ||
) |
Setup the input buffer state to scan the given bytes. The next call to ast_yylex() will scan from a copy of bytes.
bytes | the byte buffer to scan |
len | the number of bytes in the buffer pointed to by bytes. |
yyscanner | The scanner object. |
Definition at line 1973 of file main/ast_expr2f.c.
References ast_yy_scan_buffer().
Referenced by ast_yy_scan_string().
YY_BUFFER_STATE ast_yy_scan_string | ( | yyconst char * | yystr, |
yyscan_t | yyscanner | ||
) |
Setup the input buffer state to scan a string. The next call to ast_yylex() will scan from a copy of str.
yystr | a NUL-terminated string to scan |
yyscanner | The scanner object. |
Definition at line 1960 of file main/ast_expr2f.c.
References ast_yy_scan_bytes().
Referenced by ast_expr(), and ast_str_expr().
void ast_yy_switch_to_buffer | ( | YY_BUFFER_STATE | new_buffer, |
yyscan_t | yyscanner | ||
) |
Switch to a different input buffer.
new_buffer | The new input buffer. |
yyscanner | The scanner object. |
Definition at line 1664 of file main/ast_expr2f.c.
Referenced by ast_yy_scan_buffer().
int ast_yyget_column | ( | yyscan_t | yyscanner | ) |
Get the current column number.
yyscanner | The scanner object. |
Definition at line 2057 of file main/ast_expr2f.c.
YY_EXTRA_TYPE ast_yyget_extra | ( | yyscan_t | yyscanner | ) |
Get the user-defined data for this scanner.
yyscanner | The scanner object. |
Definition at line 2035 of file main/ast_expr2f.c.
FILE * ast_yyget_in | ( | yyscan_t | yyscanner | ) |
Get the input stream.
yyscanner | The scanner object. |
Definition at line 2070 of file main/ast_expr2f.c.
int ast_yyget_leng | ( | yyscan_t | yyscanner | ) |
Get the length of the current token.
yyscanner | The scanner object. |
Definition at line 2088 of file main/ast_expr2f.c.
int ast_yyget_lineno | ( | yyscan_t | yyscanner | ) |
Get the current line number.
yyscanner | The scanner object. |
Definition at line 2044 of file main/ast_expr2f.c.
FILE * ast_yyget_out | ( | yyscan_t | yyscanner | ) |
Get the output stream.
yyscanner | The scanner object. |
Definition at line 2079 of file main/ast_expr2f.c.
char * ast_yyget_text | ( | yyscan_t | yyscanner | ) |
Get the current token.
yyscanner | The scanner object. |
Definition at line 2098 of file main/ast_expr2f.c.
void ast_yypop_buffer_state | ( | yyscan_t | yyscanner | ) |
Removes and deletes the top of the stack, if present. The next element becomes the new top.
yyscanner | The scanner object. |
Definition at line 1853 of file main/ast_expr2f.c.
References ast_yy_delete_buffer(), and yyguts_t::yy_buffer_stack_top.
void ast_yypush_buffer_state | ( | YY_BUFFER_STATE | new_buffer, |
yyscan_t | yyscanner | ||
) |
Pushes the new state onto the stack. The new state becomes the current state. This function will allocate the stack if necessary.
new_buffer | The new state. |
yyscanner | The scanner object. |
Definition at line 1822 of file main/ast_expr2f.c.
References yyguts_t::yy_buffer_stack_top.
void ast_yyrestart | ( | FILE * | input_file, |
yyscan_t | yyscanner | ||
) |
Immediately switch to a different input stream.
input_file | A readable stream. |
yyscanner | The scanner object. |
INITIAL
. Definition at line 1646 of file main/ast_expr2f.c.
References ast_yy_create_buffer().
void ast_yyset_column | ( | int | column_no, |
yyscan_t | yyscanner | ||
) |
Set the current column.
line_number | |
yyscanner | The scanner object. |
Definition at line 2133 of file main/ast_expr2f.c.
void ast_yyset_extra | ( | YY_EXTRA_TYPE | user_defined, |
yyscan_t | yyscanner | ||
) |
Set the user-defined data. This data is never touched by the scanner.
user_defined | The data to be associated with this scanner. |
yyscanner | The scanner object. |
Definition at line 2108 of file main/ast_expr2f.c.
void ast_yyset_in | ( | FILE * | in_str, |
yyscan_t | yyscanner | ||
) |
Set the input stream. This does not discard the current input buffer.
in_str | A readable stream. |
yyscanner | The scanner object. |
Definition at line 2150 of file main/ast_expr2f.c.
void ast_yyset_lineno | ( | int | line_number, |
yyscan_t | yyscanner | ||
) |
Set the current line number.
line_number | |
yyscanner | The scanner object. |
Definition at line 2118 of file main/ast_expr2f.c.
YY_DECL |
The main scanner function which does all the work.
Definition at line 839 of file main/ast_expr2f.c.