GXSTR class

class GXSTR(handle=0)

GXSTR class.

This library is not a class. Use the GXSTR library functions to work with and manipulate string variables. Since the GX Programming Language does not provide string literal tokens, you must use these functions for any string operations you want to perform.

classmethod char_(str_val)

Returns the ASCII value of a character.

Parameters:str_val (str) – String to return ascii value of first character
Returns:ASCII value of first character in string.
Return type:int

New in version 5.0.

License: Geosoft Open License

classmethod char_n(str_val, c, max)

Returns the ASCII value of the n’th character.

Parameters:
  • str_val (str) – String
  • c (int) – Character to get
  • max (int) – Maximum string length (unused)
Returns:

ASCII value of n’th character in string. The first character is 0.
Return type:

int

New in version 5.0.

License: Geosoft Open License

classmethod count_tokens(str_val, delims)

Counts number of tokens.

Parameters:
  • str_val (str) – String to tokenize
  • delims (str) – Delimiter characters
Returns:

Number of tokens in the string.
Return type:

int

New in version 5.0.

License: Geosoft Open License

Note: Delimiters are “soft” in that one or more delimiters is considered a single delimiter, and preceding and trailing delimiters are ignored.

DO NOT use this function except in GXC code. The corresponding get_token function will not operate correctly in GX.Net code.

classmethod escape(str_val, opt)

Convert/replace escape sequences in strings.

Parameters:

New in version 5.0.6.

License: Geosoft Open License

Note: Escape characters:

a bell b backspace f formfeed n new line r carriage return t tab v vertical tab ” quote character x take ‘x’ literally backslash ooo octal up to 3 characters xhh hex up to 2 characters

A common use of this function is to convert double-quote characters in a user unput string to ” so the string can be placed in a tokenized string.

classmethod file_combine_parts(drive, dir, file, ext, qual, file_name)

Combine file parts to build a file name.

Parameters:
  • drive (str) – Drive
  • dir (str) – Directory
  • file (str) – Name
  • ext (str) – Extension
  • qual (str) – Qualifiers
  • file_name (str_ref) – Destination string, can be same as input

New in version 5.0.

License: Geosoft Open License

classmethod file_ext(ifile, ext, ofile, opt)

Add a file extension onto a file name string.

Parameters:
  • ifile (str) – File name to extend
  • ext (str) – Extension if “”, extenstion and ‘.’ are stripped.
  • ofile (str_ref) – Extended file name (can be same as input)
  • opt (int) – FILE_EXT constants

New in version 5.0.

License: Geosoft Open License

classmethod file_name_part(file, file_part, part)

Get part of a file name.

Parameters:

New in version 5.0.

License: Geosoft Open License

classmethod format_crc(pul_crc, buff, width)

Convert a GX CRC value to a string.

Parameters:
  • pul_crc (int) – CRC value to format
  • buff (str_ref) – Resulting string
  • width (int) – Width of the field

New in version 5.0.

License: Geosoft Open License

classmethod format_date(real, buff, width, type)

Convert a GX real to a date string.

Parameters:
  • real (float) – Date value in decimal years to format
  • buff (str_ref) – Resulting string
  • width (int) – Width of the field
  • type (int) – DATE_FORMAT constants

New in version 5.0.

License: Geosoft Open License

classmethod format_double(real, buff, type, width, dec)

Convert a GX real to a string.

Parameters:
  • real (float) – Value to format
  • buff (str_ref) – Resulting string
  • type (int) – GS_FORMATS constants
  • width (int) – Width of the field
  • dec (int) – Significant digits/decimals

New in version 5.0.

License: Geosoft Open License

classmethod format_i(int, buff, width)

Convert a GX int to a string.

Parameters:
  • int (int) – Value to format
  • buff (str_ref) – Resulting string
  • width (int) – Width of the field

New in version 5.0.

License: Geosoft Open License

classmethod format_r(real, buff, width, sig)

Convert a GX real to a string with significant digits.

Parameters:
  • real (float) – Value to format
  • buff (str_ref) – Resulting string
  • width (int) – Width of the field
  • sig (int) – Significant digits

New in version 5.0.

License: Geosoft Open License

classmethod format_r2(real, buff, width, sig)

Convert a GX real to a string with given decimals.

Parameters:
  • real (float) – Value to format
  • buff (str_ref) – Resulting string
  • width (int) – Width of the field
  • sig (int) – Decimals

New in version 5.0.

License: Geosoft Open License

classmethod format_time(real, buff, width, deci, type)

Convert a GX real to a time string.

Parameters:
  • real (float) – Time value in decimal hours to format
  • buff (str_ref) – Resulting string
  • width (int) – Width of the field
  • deci (int) – Decimals to format with
  • type (int) – TIME_FORMAT constants

New in version 5.0.

License: Geosoft Open License

classmethod gen_group_name(istr1, istr2, istr3, ostr)

Generate a group name string from type string, database and channel(optional) strings..

Parameters:
  • istr1 (str) – Input type string (static part)
  • istr2 (str) – Input db string
  • istr3 (str) – Input ch string (could be 0 length)
  • ostr (str_ref) – Output group name string

New in version 5.1.4.

License: Geosoft Open License

Note: The output group name string is formed in the way of typestr_dbstr_chstr. If the database/channel strings is too long to fit the output string (max total length of 1040, including the NULL ending), then the typestr will always be kept the full length to be the first part, while the dbstr and/or chstr will be shortened to be the second and/or third part of the output string.

See also

GenNewGroupName_MVIEW

classmethod get_m_file(in_str, out_str, index)

Get the indexed filepath from a multiple filepath string

Parameters:
  • in_str (str) – Input multifile string
  • out_str (str_ref) – Output filepath string
  • index (int) – Index of file

New in version 5.0.

License: Geosoft Open License

Note: The multifile string must use ‘|’ as a delimiter. Do not pass a string after calling tokenize.

classmethod get_token(dest, orig, tok)

Get a token from a tokenized string.

Parameters:
  • dest (str_ref) – Destination string
  • orig (str) – Tokenized string
  • tok (int) – Token number wanted (0 is the first!)

New in version 5.0.

License: Geosoft Open License

Note: Call tokens to prepare the tokenized string. You MUST NOT get tokens beyond number of tokens returned by tokens or tokens2. The first token has index 0.

DO NOT use this function except in GXC code. get_token function will not operate correctly in GX.Net code.

See also

tokens, GetToken_STR

is_null()

Check if this is a null (undefined) instance

Returns:True if this is a null (undefined) instance, False otherwise.
Return type:bool
classmethod justify(in_str, out_str, width, just)

Justify a string

Parameters:
  • in_str (str) – String to justify
  • out_str (str_ref) – Result string, can be same as input
  • width (int) – Justification width
  • just (int) – STR_JUSTIFY constants

New in version 5.0.

License: Geosoft Open License

Note: If the string is too big to fit in the number of display characters, the output string will be “**” justified as specified.

classmethod make_alpha(str_val)

Turns all non alpha-numeric characters into an _.

Parameters:str_val (str_ref) – String to trim

New in version 5.1.8.

License: Geosoft Open License

Note: THE STRING IS MODIFIED.

classmethod null()

A null (undefined) instance of GXSTR

Returns:A null GXSTR
Return type:GXSTR
classmethod parse_list(str_val, gvv)

Parse a tokenized list to get a selection list.

Parameters:
  • str_val (str) – String to be parsed
  • gvv (GXVV) – Selection Buffer to fill

New in version 5.0.1.

License: Geosoft Open License

Note: Given a list such as “1,3,4,6-9,12”, it fills the input buffer with 1 if the number is selected, 0 if not. The items are delimited with spaces or commas, and ranges are acceptable, either using a “-” or ”:”, e.g. 3-6 and 3:6 both mean 3,4,5, and 6. Only values from 0 to one less than the buffer length are used. Out-of-range values are ignored.

classmethod printf(dest, mask)

Variable Argument PrintF function

Parameters:
  • dest (str_ref) – Destination string
  • mask (str) – Pattern string

New in version 7.3.

License: Geosoft Open License

classmethod remove_qualifiers(ifile, ofile)

Remove file qualifiers from a file name

Parameters:
  • ifile (str) – Input file name
  • ofile (str_ref) – Output file name (can be same as input)

New in version 7.0.1.

License: Geosoft Open License

classmethod replace_char(istr, old, new)

Replaces characters in a string.

Parameters:
  • istr (str_ref) – String to modify
  • old (str) – Character to replace (first character only)
  • new (str) – Replacement character (first character only)

New in version 5.0.

License: Geosoft Open License

Note: If the input replacement character is “”, then the string will be truncated at the first character to replace.

classmethod replace_char2(istr, old, new)

Replaces characters in a string, supports simple removal.

Parameters:
  • istr (str_ref) – String to modify
  • old (str) – Character to replace (first character only)
  • new (str) – Replacement character (first character only)

New in version 6.3.

License: Geosoft Open License

Note: If the replacement character is “” (NULL character) then the character to replace is removed from the input string, and the string is shortened.

classmethod replace_match_string(istr, old, new)

Replaces all occurances of match string by replacement string with case sensitive.

Parameters:
  • istr (str_ref) – Destination String
  • old (str) – Match string to replace
  • new (str) – Replacement string

New in version 7.0.1.

License: Geosoft Open License

Note: If the replacement string is “” (NULL character) then the string to replace is removed from the input string, and the string is shortened.

classmethod replace_multi_char(istr, old, new)

Replaces multiple characters in a string.

Parameters:
  • istr (str_ref) – String to modify
  • old (str) – Characters to replace
  • new (str) – Replacement characters

New in version 5.1.5.

License: Geosoft Open License

Note: The number of characters to replace must equal the number of replacement characters.

classmethod replace_non_ascii(str_val, rpl)

Replace non-ASCII characters in a string.

Parameters:
  • str_val (str_ref) – String to modify
  • rpl (str) – Replacement character

New in version 6.0.

License: Geosoft Open License

Note: All characthers > 127 will be replaced by the first character of the replacement string.

classmethod replacei_match_string(istr, old, new)

Replaces all occurances of match string by replacement string with case insensitive.

Parameters:
  • istr (str_ref) – Destination String
  • old (str) – Match string to replace
  • new (str) – Replacement string

New in version 7.0.1.

License: Geosoft Open License

Note: If the replacement string is “” (NULL character) then the string to replace is removed from the input string, and the string is shortened.

classmethod scan_date(str_val, type)

Convert a date string to a GX real.

Parameters:
Returns:

Resulting Real, rDUMMY if conversion fails.
Return type:

float

New in version 6.0.1.

License: Geosoft Open License

Note: OLD usage, use ScanForm_STR instead.

classmethod scan_form(str_val, type)

Convert a formated string to a real.

Parameters:
Returns:

Resulting Real, rDUMMY if conversion fails.
Return type:

float

New in version 6.0.1.

License: Geosoft Open License

classmethod scan_i(str_val)

Convert a string to a GX int.

Parameters:str_val (str) – String to convert to an integer
Returns:Resulting Integer, iDUMMY is bad integer
Return type:int

New in version 6.0.1.

License: Geosoft Open License

classmethod scan_r(str_val)

Convert a string to a GX real.

Parameters:str_val (str) – String to convert to a real
Returns:Resulting Real, rDUMMY if bad string.
Return type:float

New in version 6.0.1.

License: Geosoft Open License

classmethod scan_time(str_val, type)

Convert a time string to a GX real.

Parameters:
Returns:

Resulting Real, rDUMMY if conversion fails.
Return type:

float

New in version 6.0.1.

License: Geosoft Open License

Note: OLD usage, use ScanForm_STR instead.

classmethod set_char(str_val, ascii)

Set a string’s first character using an ASCII value of a character.

Parameters:
  • str_val (str_ref) – String
  • ascii (int) – ASCII value

New in version 5.1.4.

License: Geosoft Open License

classmethod set_char_n(str_val, c, ascii)

Set the n’th character of a string using an ASCII value

Parameters:
  • str_val (str_ref) – String
  • c (int) – Character to set
  • ascii (int) – ASCII value

New in version 5.1.4.

License: Geosoft Open License

classmethod split_string(origstr, ch, split)

Splits a string in two on a character.

Parameters:
  • origstr (str_ref) – Original string
  • ch (str) – Split character (first character of string)
  • split (str_ref) – Split string past split character.

New in version 5.0.

License: Geosoft Open License

Note: The original string is modified by terminating it at the character split.

The part of the string past the character split is copied to the split string.

Split characters in quoted strings are ignored.

This function is mainly intended to separate comments from control file strings.

classmethod str_mask(mask, test)

Case sensitive comparison of two strings.

Parameters:
  • mask (str) – Mask
  • test (str) – String to test
Returns:

0 if string does not match mask. 1 if string matches mask.
Return type:

int

New in version 5.0.

License: Geosoft Open License

Note: Mask characters ‘*’ - matches any one or more up to next character ‘?’ - matches one character

Test is case sensitive

classmethod str_min(str_val)

Remove spaces and tabs and return length

Parameters:str_val (str_ref) – String to find the min length of
Returns:String length.
Return type:int

New in version 5.0.

License: Geosoft Open License

Note: String may be modified. This function should not be used to determine if a file name string is defined, because a valid file name can contain spaces, and once “tested” the name will be altered. Instead, use str_min2, or use GXSYS.file_exist to see if the file actually exists.

classmethod str_min2(str_val)

Length less spaces and tabs, string unchanged.

Parameters:str_val (str) – String to find the min length of
Returns:String length.
Return type:int

New in version 5.0.

License: Geosoft Open License

classmethod str_str(str_val, sub, mode)

Scan a string for the occurrence of a given substring.

Parameters:
  • str_val (str) – String to scan
  • sub (str) – String to look for
  • mode (int) – STR_CASE constants
Returns:

-1 if the substring does not occur in the string Index of first matching location if found
Return type:

int

New in version 5.1.6.

License: Geosoft Open License

classmethod strcat(dest, orig)

This method contatinates a string.

Parameters:
  • dest (str_ref) – Destination String
  • orig (str) – String to add

New in version 5.0.

License: Geosoft Open License

classmethod strcmp(first, second, mode)

This method compares two strings and returns these values

Parameters:
Returns:

A < B -1 A == B 0 A > B 1
Return type:

int

New in version 5.0.

License: Geosoft Open License

classmethod strcpy(dest, orig)

This method copies a string into another string.

Parameters:
  • dest (str_ref) – Destination string
  • orig (str) – Origin string

New in version 5.0.

License: Geosoft Open License

classmethod stri_mask(mask, test)

Case insensitive comparison of two strings.

Parameters:
  • mask (str) – Mask
  • test (str) – String to test
Returns:

0 if string does not match mask. 1 if string matches mask.
Return type:

int

New in version 5.0.

License: Geosoft Open License

Note: Mask characters ‘*’ - matches any one or more up to next character ‘?’ - matches one character

Test is case insensitive

classmethod strins(dest, ins, orig)

This method inserts a string at a specified position.

Parameters:
  • dest (str_ref) – Destination String
  • ins (int) – Insert Position
  • orig (str) – String to add

New in version 5.1.8.

License: Geosoft Open License

Note: If the specified position does not fall within the current string the source string will simply be Concatenated.

classmethod strlen(str_val)

Returns the length of a string.

Parameters:str_val (str) – String to find the length of
Returns:String length.
Return type:int

New in version 5.0.

License: Geosoft Open License

classmethod strncmp(first, second, n_char, mode)

Compares two strings to a given number of characters.

Parameters:
  • first (str) – String A
  • second (str) – String B
  • n_char (int) – Number of characters to compare
  • mode (int) – STR_CASE constants
Returns:

A < B -1 A == B 0 A > B 1
Return type:

int

New in version 5.0.5.

License: Geosoft Open License

classmethod substr(dest, orig, start, length)

Extract part of a string.

Parameters:
  • dest (str_ref) – Destination string
  • orig (str) – Origin string
  • start (int) – Start location
  • length (int) – Number of characters

New in version 6.2.

License: Geosoft Open License

Note: The destination string length will be less than the requested length if the substring is not fully enclosed in the origin string.

classmethod to_lower(str_val)

Convert a string to lower case.

Parameters:str_val (str_ref) – String

New in version 5.0.

License: Geosoft Open License

classmethod to_upper(str_val)

Convert a string to upper case.

Parameters:str_val (str_ref) – String

New in version 5.0.

License: Geosoft Open License

classmethod tokenize(str_val, soft, hard, esc, quote)

Tokenize a string based on any characters.

Parameters:
  • str_val (str_ref) – GXSTR - String containing token(s)
  • soft (str) – szSoft - Soft delimiters (spaces/tabs)
  • hard (str) – szHard - Hard delimiters (commas)
  • esc (str) – szEsc - Escape delimiters (back-slash)
  • quote (str) – szQuote- Quote delimiters (quote characters)
Returns:

Number of tokens
Return type:

int

New in version 5.0.

License: Geosoft Open License

Note: This uses a finite state machine to tokenize on these rules:

1. Any one character following an escape delimiter is treated as a normal character.

2. Any characters inside a quote string are treated as normal characters.

3. Any number of Soft delimiters in sequence without a hard delimiter are treated as one hard delimited.

4. Any number of soft delimiters can preceed or follow a hard delimiter and are ignored.

EXAMPLE

Soft = [ ] Hard = [,] Escape = [] Quote = [“]

[this is a , , the “test,” of , ,” my delimite fi,]

Results in:

[this] [is] [a] [] [the] [“test,”] [of] [,”] [my] [delimite] [fi] []

NOT use this function except in GXC code. The corresponding etToken_STR function will not operate correctly in GX.Net code.

See also

GetToken_STR

classmethod tokens(str_val, delims)

Tokenize a string

Parameters:
  • str_val (str_ref) – String to tokenize
  • delims (str) – Delimiter characters
Returns:

Number of tokens, maximum is 2048
Return type:

int

New in version 5.0.

License: Geosoft Open License

Note: Delimiters in the string are reduced to a single NULL. Delimiters withing double quoted strings are ignored. Use GetToken_STR to extract tokens.

DO NOT use this function except in GXC code. The corresponding get_token function will not operate correctly in GX.Net code.

See also

tokens2, GetToken_STR

classmethod tokens2(str_val, soft, hard, esc, quote)

General tokenize a string

Parameters:
  • str_val (str_ref) – String to tokenize
  • soft (str) – szSoft - Soft delimiters (spaces/tabs)
  • hard (str) – szHard - Hard delimiters (commas)
  • esc (str) – szEsc - Escape delimiters (back-slash)
  • quote (str) – szQuote- Quote delimiters (quote characters)
Returns:

Number of Tokens
Return type:

int

New in version 5.0.

License: Geosoft Open License

Note: This function is for old GX compatibility only. See tokenize.

DO NOT use this function except in GXC code. The corresponding get_token function will not operate correctly in GX.Net code.

classmethod trim_quotes(str_val)

Remove double quotes.

Parameters:str_val (str_ref) – String to trim

New in version 5.0.

License: Geosoft Open License

Note: THE STRING IS MODIFIED. This method goes through the string and removes all spaces in a string except those enclosed in quotes. It then removes any quotes. It is usfull for trimming unwanted spaces from an input string but allows the user to use quotes as well. If a quote follows a backslash, the quote is retained and the backslash is deleted. These quotes are NOT treated as delimiters.

classmethod trim_space(str_val, trim)

Remove leading and/or trailing whitespace.

Parameters:

New in version 5.0.

License: Geosoft Open License

Note: THE STRING IS MODIFIED. Whitespace characters are defined as space, tab, carriage return, new line, vertical tab or formfeed (0x09 to 0x0D, 0x20)

classmethod un_quote(str_val)

Remove double quotes from string

Parameters:str_val (str_ref) – String to unquote

New in version 5.0.

License: Geosoft Open License

Note: THE STRING IS MODIFIED. The pointers will be advanced past a first character quote and a last character quote will be set to .0’. Both first and last characters must be quotes for the triming to take place.

classmethod xyz_line(line, xyz)

Make a valid XYZ line name from a valid GXDB line name.

Parameters:
  • line (str) – Line name to convert
  • xyz (str_ref) – Buffer to hold new line name

New in version 5.0.

License: Geosoft Open License

FILE_EXT constants

Extension option

FILE_EXT_ADD_IF_NONE

Will add the extension only if no extension is present.

gxapi.FILE_EXT_ADD_IF_NONE = 0
FILE_EXT_FORCE

Will cause a renaming of the file extension to the new extension.

gxapi.FILE_EXT_FORCE = 1

STR_CASE constants

Case sensitivity

STR_CASE_TOLERANT

Tolerant

gxapi.STR_CASE_TOLERANT = 0
STR_CASE_SENSITIVE

Sensitive

gxapi.STR_CASE_SENSITIVE = 1

STR_ESCAPE constants

How to handle escape

ESCAPE_CONVERT

Converts non-standard characters in a string to escape sequences.

gxapi.ESCAPE_CONVERT = 0
ESCAPE_REPLACE

Replaces escape sequences with original characters.

gxapi.ESCAPE_REPLACE = 1

STR_FILE_PART constants

Parts of a path string

STR_FILE_PART_NAME

File Name

gxapi.STR_FILE_PART_NAME = 0
STR_FILE_PART_EXTENSION

Extension

gxapi.STR_FILE_PART_EXTENSION = 1
STR_FILE_PART_DIRECTORY

Directory

gxapi.STR_FILE_PART_DIRECTORY = 2
STR_FILE_PART_VOLUME

Drive

gxapi.STR_FILE_PART_VOLUME = 3
STR_FILE_PART_QUALIFIERS

Qualifiers

gxapi.STR_FILE_PART_QUALIFIERS = 4
STR_FILE_PART_NAME_EXTENSION

Name and the Extension together

gxapi.STR_FILE_PART_NAME_EXTENSION = 5
STR_FILE_PART_FULLPATH_NO_QUALIFIERS

Full name of file with no qualifiers

gxapi.STR_FILE_PART_FULLPATH_NO_QUALIFIERS = 6

STR_JUSTIFY constants

String justification style

STR_JUSTIFY_LEFT

Left

gxapi.STR_JUSTIFY_LEFT = 0
STR_JUSTIFY_CENTER

Center

gxapi.STR_JUSTIFY_CENTER = 1
STR_JUSTIFY_RIGHT

Right

gxapi.STR_JUSTIFY_RIGHT = 2

STR_TRIM constants

What to trim

STR_TRIMRIGHT

Str trimright

gxapi.STR_TRIMRIGHT = 1
STR_TRIMLEFT

Str trimleft

gxapi.STR_TRIMLEFT = 2
STR_TRIMBOTH

Str trimboth

gxapi.STR_TRIMBOTH = 3