parser.l File Reference

The interpreter pass 1 in a single flex file. More...

#include <stdio.h>
#include <string.h>
#include <libgen.h>
#include <errno.h>
#include <quadmath.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <unistd.h>
#include "determinations.h"
#include "dry.h"

Include dependency graph for parser.l:

Functions
static void	unbackslash (char *p_str)
	String Cleaning 1.
static char *	endofline (char *p_str)
	String Cleaning 2.
static char *	norm_check_int (char *p_str)
	Normalization and range check for a string representation of an 128 bit integer.
static char *	norm_check_rational (char *p_str)
	Normalization and range check for a string representation of a Leonardus rational number.
static int	check_real (char *p_str)
	Range check for a string representation of an 128 bit float.
static bool	is_directory (const char *p_path)
	Check if the given path is valid and readable.
int	yylex (void)
	The generated scanner.
static enum ExitCode	commandline (int argc, char **argv)
	Command line parsing.
int	main (int argc, char *argv[])
	The parser main().
int	yywrap (void)
	yywrap().

Variables
static int	g_verbose = 0
	Global option "verbose".
static int	g_suppressaec = 0
	Global option suppress ANSI escape codes.
static int	g_linebuffer = 0
	Global option "line buffering".
static int	g_helpprinted = 0
	Global status help printed
static char *	g_basename = NULL
	My program file name.
static char *	g_dirname = NULL
	My program path name.
static char *	g_vocdir1 = NULL
	The path to the vocabularies.
static char *	g_vocdir2 = NULL
	The path to the vocabularies.
static YY_BUFFER_STATE	g_buffer_stack [16]
	A stack of buffers for the vocabulary nesting.
static FILE *	g_file_stack [16]
	A stack of FILE * for the vocabulary nesting.
static int	g_buffer_stack_top = -1
	Index into the stacks of buffers and FILE * for the vocabulary nesting.

Detailed Description

The interpreter pass 1 in a single flex file.

Copyright

  Leonardus, a minimalist stack-based programming system.
  Copyright (C) 2025  Andreas Muckenschnabel
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with this program.
If not, see https://www.gnu.org/licenses/.

Function Documentation

check_real()

static int check_real ( char *  p_str )

static

Range check for a string representation of an 128 bit float.

Parameters

[in]

p_str

String to check

Returns

int ... 0 for a valid string

ERANGE for overflows, underflows and general errors.

commandline()

static enum ExitCode commandline ( int  argc, char **  argv  )

static

Command line parsing.

Parameters

[in]	argc	argc from main()
[in]	argv	argv from main()

Returns

enum ExitCode ... The defined program execution exit codes from dry.h.

< EC_SUCCESS string literal waiting for C++26.

< EC_INTERPRETER string literal waiting for C++26.

< EC_CMDLINE string literal waiting for C++26.

endofline()

static char * endofline ( char *  p_str )

static

String Cleaning 2.

Substitutes all x0a characters by a "\n" sequence. The resulting string is returned in a new allocated storage, which has to be freed by the caller.

Parameters

[in,out]

p_str

The string to be cleaned.

Returns

char * ... The resulting string.

is_directory()

static bool is_directory ( const char *  p_path )

static

Check if the given path is valid and readable.

Parameters

[in]

p_path

The path to check.

Returns

bool ... true if the path is valid, oherwise false.

main()

int main	(	int	argc,
		char *	argv[]
	)

The parser main().

Parameters

[in]	argc	Usual argc.
[in]	argv	Usual argv.

Returns

enum ExitCode ... The defined program execution exit codes from dry.h.

norm_check_int()

static char * norm_check_int ( char *  p_str )

static

Normalization and range check for a string representation of an 128 bit integer.

Format of p_str is: [-]?[0-9]+

Parameters

[in]

p_str

String to check

Returns

char * ... Points somewhere into the normalized p_str buffer.

Is NULL if the range check fails.

norm_check_rational()

static char * norm_check_rational ( char *  p_str )

static

Normalization and range check for a string representation of a Leonardus rational number.

Format of p_str is: {RATIONAL}

Parameters

[in]

p_str

String to check

Returns

char * ... Points somewhere into the normalized p_str buffer.

Is NULL if the range check fails.

unbackslash()

static void unbackslash ( char *  p_str )

static

String Cleaning 1.

Removes all single backslashes from the string p_str, preserving double backslashes (\) and newline sequences (\n).
These are the only escape sequences recognized in the leon-format format.

Parameters

[in,out]

p_str

The string to be cleaned.

yywrap()

int yywrap

(

void

)

yywrap().

Returns

int ... It returns 1 for true, then the scanner terminates, returning 0 to its caller.

Variable Documentation

g_vocdir1

char* g_vocdir1 = NULL

static

The path to the vocabularies.

Version 1.

g_vocdir2

char* g_vocdir2 = NULL

static

The path to the vocabularies.

Version 2.