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STRINGS.H
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1993-02-26
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/*
* Copyright (C) 1993 Marc Stern (internet: stern@mble.philips.be)
*
* File : strings.h
*
* Description : strings management
*
*/
#ifndef __Strings_H
#define __Strings_H
/* INCLUDE FILES */
#include "c2cpp.h"
#include <string.h>
#include <stddef.h>
/***
* Function : foreach
*
* Description : Loop on each token of a string
*
* Parameters : out char *word pointer that will contain word (token)
* in/out char *string string to tokenize
*
* Side-effects: Macro, so be careful.
* '\0' will be inserted into string.
*
* Return code : none
***/
#define foreach( word , string ) \
for ( word = strtok(string," ") ; word ; word = strtok(NULL," ") )
/***
* Function : STRMIN/STRMAX
*
* Description : return min/max of two strings
*
* Parameters : in char *str1
* in char *str2
*
* Side-effects: Macro, so be careful.
*
* Return : pointer to min/max of the two strings
***/
#define STRMIN( str1 , str2 ) ( (strcmp(str1 , str2) < 0) ? str1 : str2 )
#define STRMAX( str1 , str2 ) ( (strcmp(str1 , str2) > 0) ? str1 : str2 )
/***
* Function : strisequal
*
* Description : Test equality of two strings
*
* Parameters : in char *str1
* in char *str2
*
* Return : 0 or 1
***/
#define strisequal( string1 , string2 ) ( ! strcmp(string1 , string2) )
/*** For switch/case-like string manipulation
usage: STRWITCH( string )
{
STRCASE "string1": ... ;
STRCASE "string2": ... ; break ;
...
STRDEFAULT : ... ;
} STRENDSWITCH
***/
#define STRSWITCH( _str ) { char *_tmp_s = _str ; \
int _tmp_flag = 0 ; \
do { if ( _tmp_flag )
#define STRCASE( _str ) ( _tmp_flag = 1 ) ; } \
if ( _tmp_flag || ! strcmp(_tmp_s, _str) ) { 0 ? 0
#define STRDEFAULT 0 ; } { 0 ? 0
#define STRENDSWITCH } while (0) ; }
/* TYPES DEFINITIONS */
typedef enum { align_left , align_right , align_center } align_type ;
typedef enum { LOWER = 5 , UPPER } casetype ;
/* FUNCTIONS DEFINITIONS */
/***
* Function : strleft
*
* Description : Copy the first ... characters of a string.
* Like strncpy but add a '\0' at the end of the output string.
*
* Decisions : If given length > string length : normal strcpy
* If given length <= 0 returns an empty string.
*
* Parameters : out char *out_str result
* in char *in_str in string
* in int length length to be copied
*
* Return code : pointer to result.
*
* OS/Compiler : All
*/
EXTERN char *strleft( char* , const char* , int ) ;
/***
* Function : strright
*
* Description : Copy the last ... characters of a string.
*
* Decisions : If given length > string length : normal strcpy
* If given length <= 0 returns an empty string.
*
* Parameters : out char *out_str result
* in char *in_str in string
* in int length length to be copied
*
* Return code : pointer to result.
*
* OS/Compiler : All
*/
EXTERN char *strright( char* , const char* , int ) ;
/***
* Function : strmid
*
* Description : Copy n characters of a string, begining at a given position
* ( form 1 to ... )
*
* Decisions : Stops at the end of input string if given length
* is too big or length = 0.
* If given length or position < 0 returns an empty string.
*
* Parameters : out char *out_str result
* in char *in_str in string
* in int pos position where begin to copy
* in int length length to be copied
*
* Return code : pointer to result.
*
* OS/Compiler : All
*/
EXTERN char *strmid( char* , const char* , int , int ) ;
/***
* Function : stralign
*
* Description : Copy an input string in an output string
* with specified alignement (blank padding).
*
* Decisions : If given length < 0 returns an empty string.
*
* Parameters : out char *out_str result
* in char *in_str in string
* in align_type type, type
* in int length length to be copied
*
* Value : type = { align_left, align_center, align_right }
*
* Return code : pointer to result.
*
* OS/Compiler : All
*/
EXTERN char *stralign( char* , const char* , align_type , int ) ;
/***
* Function : strmvstr
*
* Description : Copy an input string in an output string
* with replacing all occurences of a target string.
*
* Parameters : out char *out_str result
* in char *in_str in string
* in char *target target string to replace
* in char *new_str string to put in place of target
*
* Return code : pointer to result.
*
* OS/Compiler : All
***/
EXTERN char *strmvstr( char* , const char* , const char* , const char* ) ;
/***
* Function : strmvchr
*
* Description : Replace all occurences of a target character
* by a new character.
*
* Parameters : in/out char *string
* in char target target char to replace
* in char new_char char to put in place of target
*
* Return code : pointer to result.
*
* OS/Compiler : All
***/
EXTERN char *strmvchr( char* , char , char ) ;
/***
* Function : strrmstr
*
* Description : Removing all occurences of a target string.
*
* Parameters : in/out char *string
* in char *target target string to remove
*
* Decisions : Same implementation as strmvstr without copying
* a replacement string.
* Could also be implemented as
* strmvstr( ptr, ptr, target, "" )
* but should be less efficient.
*
* Return code : pointer to result.
*
* OS/Compiler : All
***/
EXTERN char *strrmstr( char* , const char* ) ;
/***
* Function : strrmchr
*
* Description : Removing all occurences of a target character.
*
* Parameters : in/out char *string
* in char target target char to remove
*
* Return code : pointer to result.
*
* OS/Compiler : All
***/
EXTERN char *strrmchr( char* , char ) ;
/***
* Function : strinsert
*
* Description : Insert a string in another.
*
* Parameters : out char *out_str out string
* in char *in_str in string
* in char *to_insert in string to insert into the other
* in int place place to insert string
*
* Decisions : Does nothing if place specified out of range.
*
* Return : pointer to result
*
* OS/Compiler : All
***/
EXTERN char *strinsert( char* , const char* , const char* , int ) ;
/***
* Function : strend
*
* Description : Returns a pointer to the '\0' ending a string
*
* Parameters : in char *in_str in string
*
* Return code : pointer to the '\0' ending the string..
*
* OS/Compiler : All
***/
EXTERN char *strend( const char* ) ;
/***
* Function : strskip
*
* Description : Skip 'n' words from a string.
*
* Decisions :
*
* Parameters : in char *string string to be matched
* in int word_nb number of words to skip
*
* Return code : pointer to word.
*
* OS/Compiler : All
***/
EXTERN char *strskip( const char* , int ) ;
/***
* Function : strisalpha
*
* Description : Tests if a string contains only alphabetical character
*
* Parameters : in char *string
*
* Return : 1 if string contains only alphabetical characters.
* 0 otherwise
*
* OS/Compiler : All
***/
EXTERN int strisalpha( const char* ) ;
/***
* Function : strisalnum
*
* Description : Tests if a string contains only alphanumerical character
*
* Parameters : in char *string
*
* Return : 1 if string contains only alphanumerical characters.
* 0 otherwise
*
* OS/Compiler : All
***/
EXTERN int strisalnum( char* ) ;
/***
* Function : stris_alnum
*
* Description : Tests if a string contains only alphanumerical characters or '_'.
*
* Parameters : in char *string
*
* Return : 1 if string contains only alphanumerical characters or '_'.
* 0 otherwise
*
* OS/Compiler : All
***/
EXTERN int stris_alnum( const char* ) ;
/***
* Function : strelt
*
* Description : Return the n-th element (token) in a string.
* The tokens are separated by several input character.
*
* Decisions : If tokens are separated by ' ', '\t' or '\n',
* the input characters will be " ".
* If n-th token does not exist, an empty string is returned.
*
* Parameters : out char *out_str out string
* in char *in_str in string
* out char *token string containing token
* in int element element number
*
* Return : pointer to the n-th token.
*
* OS/Compiler : All
*/
EXTERN char *strelt( char* , const char* , char* , int ) ;
/***
* Function : strreduce
*
*
* Description : Parse a string to suppress blanks, tabs and newlines
* and transform it in uppercase.
*
*
* Decisions : - Portions of string between double quotes are unmodified
* (quotes are removed).
*
* - '\' is used to quote the next character.
*
* - Characters with accent are also transformed to uppercase.
*
* Parameters : in/out char *string
*
* Return : pointer to end of string ( '\0' ).
*
* OS/Compiler : All
***/
EXTERN char *strreduce( char* ) ;
/***
* Function : strtoken
*
* Description : Parse a string to extract the next token.
*
* Decisions : The tokens are separated by ' ', '\t' or '\n'.
* Tokens may contain these separators by being quoted with
* one of the following characters : '"`.
* The function returns a pointer to the character following the token.
* Special escape sequences accepted:
* \b, \f, \n, \r, \t, \e (Esc), \x..., \0..., \...
*
* Parameters : in char *string string to be tokenized
* out char *token string containing token
*
* Return code : pointer to character following the token.
*
* OS/Compiler : All
***/
EXTERN char *strtoken( const char* , char* ) ;
/***
* Function : strcase
*
* Description : change case of a string.
* All special characters are translated (éèà...)
*
* Parameters : in char *string string to translate
* in casetype type UPPER/LOWER
*
* Value : type = { UPPER, LOWER }
*
* Decisions : If character > 255, no change made.
*
* Return : pointer to result
*
* OS/Compiler : All
***/
EXTERN char *strcase( char* , casetype ) ;
/***
* Function : chcase
*
* Description : change case of a 2-byte character.
* All special characters are translated (éèà...)
*
* Parameters : in char car char to translate
* in casetype type UPPER/LOWER
*
* Value : type = { UPPER, LOWER }
*
* Decisions : If character > 255, no change made.
*
* Return : code of char translated
*
* OS/Compiler : All
***/
EXTERN int chcase( int , casetype ) ;
/***
* Function : strcomp
*
* Description : Compare two strings case-insensitive
* All special characters are translated (éèà...)
*
* Parameters : in char *str1
* in char *str2
*
* Return : -1 if str1 < str2
* 1 if str1 > str2
* 0 if str1 == str2
*
* OS/Compiler : All
***/
EXTERN int strcomp( const char *str1, const char *str2 );
/***
* Function : strncomp
*
* Description : Compare n characters of two strings case-insensitive
* All special characters are translated (éèà...)
*
* Parameters : in char *str1
* in char *str2
*
* Return : -1 if str1 < str2
* 1 if str1 > str2
* 0 if str1 == str2
*
* OS/Compiler : All
***/
EXTERN int strncomp( const char *str1, const char *str2, int length );
/***
* Function : matchset (internal)
*
* Description : Test if a character matches a set expression.
*
* Parameters : in char c character to be matched
* in char *pattern regular expression to match
*
* Parameters : in char *string
*
* Decisions : The following symbols are treated specially:
*
* \ quote next character - range of values
* ^ non-inclusion (if first character)
*
* ex: aeiou0-9 match a, e, i, o, u, and 0 thru 9
* ^aeiou0-9 match anything but a, e, i, o, u, and 0 thru 9
*
* Side-effects: pattern contents will be destroyed.
*
* Return : 1 or 0
*
* OS/Compiler : All
***/
EXTERN int matchset( char c, char *pattern );
/***
* Function : recursexp
*
* Description : Returns the number of character of a string matched
* by a regular expression.
*
* Decisions : The following symbols are treated specially:
*
* . any character \ quote next character
* * match zero or more + match one or more
* [] set of characters
*
*
* Parameters : in char *string input string to be matched
* in char *pattern regular expression to match
*
* Return : number of character matched by regular expression
* -1 if not matched
*
* OS/Compiler : All
***/
EXTERN int recursexp( const char *string, char *pattern );
/***
* Function : regexp
*
* Description : Returns the string matched by a regular expression
* into a string.
*
* Decisions : The following symbols are treated specially:
*
* ^ start of line $ end of line
* ? any character \ quote next character
* * match zero or more [] set of characters
*
* ex: [aeiou0-9] match a, e, i, o, u, and 0 thru 9
* [^aeiou0-9] match anything but a, e, i, o, u, and 0 thru 9
*
* Parameters : out char *outstr resulting string
* in char *string input string in which we search
* in char *pattern regular expression to match
*
* Return : - pointer to resulting string
* - if ( outstr == NULL ) returns pointer to matched string
* inside 'string'.
*
* OS/Compiler : All
***/
EXTERN char *regexp( char *outstr, const char *string, const char *pattern );
/***
* Function : strtohex
*
* Description : convert a string containing an hexadecimal
* representation into an hexadecimal flow of bytes.
*
* Parameters : char *string in/out
*
* Return : length of hexadecimal flow of bytes.
* -1 on error
*
* OS/Compiler : All
***/
EXTERN int strtohex( char *string );
/***
* Function : hextostr
*
* Description : Convert an hexadecimal flow of bytes into
* a string containing an hexadecimal representation.
*
* Parameters : out char *string
* in char *hexa
* in int length number of hexadecimal bytes
*
* Return : 0 if OK
* -1 on error
*
* OS/Compiler : All
***/
EXTERN int hextostr( char *string, const char *hexa, int length );
/***
* Function : strcpyb
*
* Description : Like strcpy but truncates trailing blanks and \n
* and skip leading blanks.
*
* Parameters : out char * target
* in char * source
*
* Return code : like strcpy
*
* OS/Compiler : All
***/
EXTERN char *strcpyb( char *target, const char *source );
/***
* Function : strncpyb
*
* Description : Like strncpy but truncates trailing blanks and \n,
* skip leading blanks and adds a '\0'.
*
* Decisions :
*
* Parameters : out char * target
* in char * source
* in int length
*
* Return code : like strncpy
*
* Side-effects: Pad target string to length with '\0'.
*
* OS/Compiler : All
***/
EXTERN char *strncpyb( char *target, const char *source, int length );
#endif