cliio.c File Reference

Utilities for creating a command line interface. More...

#include <ctype.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cliio.h"

Go to the source code of this file.

Functions
int	AllocImageObj (image *f, int Width, int Height, int NumChannels)
void	FreeImageObj (image f)
int	ReadImageObj (image *f, const char *FileName)
int	ReadImageObjGrayscale (image *f, const char *FileName)
int	WriteImageObj (image f, const char *FileName, int JpegQuality)
int	IsGrayscale (num *Data, int Width, int Height)
	Check whether all three channels in a color image are the same.
int	GetStrToken (char *Token, const char *Start, int MaxLength, const char *Delim)
	Extract a token from a null-terminated string. More...
int	ParseDouble (double *Num, const char *String)
	Read a floating-point number from a string. More...
int	CliParseArglist (const char **Param, const char **Value, char *TokenBuf, int MaxLength, int k, const char *Start, int argc, const char *argv[], const char *Delimiters)
	Parse an arg list for param-value pairs. More...
int	CliGetNum (num *Value, const char *String, const char *Param)
	Strictly read a num value.
int	ReadMatrixFromTextFile (image *f, const char *FileName)
	Read a matrix from a text file.
int	ReadMatrixFromFile (image *f, const char *FileName, int(*RescaleFun)(image *f))
	Read a matrix from a text or image file.

Variables
const image	NullImage = {NULL, 0, 0, 0}

Detailed Description

Utilities for creating a command line interface.

Author

Pascal Getreuer getre.nosp@m.uer@.nosp@m.gmail.nosp@m..com

Definition in file cliio.c.

Function Documentation

int CliParseArglist	(	const char **	Param,
		const char **	Value,
		char *	TokenBuf,
		int	MaxLength,
		int	k,
		const char *	Start,
		int	argc,
		const char *	argv[],
		const char *	Delimiters
	)

Parse an arg list for param-value pairs.

Parameters

Param	where to store the parameter pointer
Value	where to store the value pointer
TokenBuf	token buffer with space for at least MaxLength+1 chars
MaxLength	token buffer size
k	starting arg
Start	starting character position in argv[k]
argc,argv	the arg list
Delimiters	characters that delimit parameters from values

Returns

index of the arg containing the value

For example, with Delimiters = ":", the routine parses arg lists of the form {"param1:value1", "param2:value2", "param3:value3"}. It is flexible to allow argument breaks around the delimiter, including any of the following syntaxes: {"param", "value"}, {"param:", "value"}, {"param", ":", "value"}, {"param", ":", "", "value"}.

The routine can be used as

char TokenBuf[256];
int k = 1;
while(k < argc)
{
    kread = CliParseArglist(&Param, &Value, TokenBuf, sizeof(TokenBuf),
        k, argv[k], argc, argv, ":");
    printf("Read parameter %s = value %s\n", Param, Value);
    k = kread + 1;
}

Definition at line 248 of file cliio.c.

int GetStrToken	(	char *	Token,
		const char *	Start,
		int	MaxLength,
		const char *	Delim
	)

Extract a token from a null-terminated string.

Parameters

Token	destination buffer (with space for at least MaxLength+1 chars)
Start	pointer to the source string
MaxLength	maximum length of the token, not including null terminator
Delim	delimiter characters

Returns

length of the token (greater than MaxLength indicates truncation).

Definition at line 118 of file cliio.c.

int ParseDouble	(	double *	Num,
		const char *	String
	)

Read a floating-point number from a string.

Parameters

Num	is a pointer to where to store the result
String	is a pointer to the source string to parse

Returns

the number of characters read (possibly 0).

The function strtod does not seem to work on some systems. We use the following routine instead.

The routine reads as many characters as possible to form a valid floating-point number in decimal or scientific notation. A return value of zero indicates that no valid number was found.

Definition at line 142 of file cliio.c.