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Merge /u/gitlost/zint/ branch gs1_nocheck_mode into master

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https://sourceforge.net/p/zint/code/merge-requests/128/
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docs/manual.txt
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@ -1410,36 +1410,47 @@ symbology.
The way in which the input data is encoded can be set using the input_mode
property. Valid values are shown in the table below.
------------------------------------------------------------------------------
Value | Effect
------------------------------------------------------------------------------
DATA_MODE | Uses full ASCII range interpreted as Latin-1 or binary data.
UNICODE_MODE | Uses pre-formatted UTF-8 input.
GS1_MODE | Encodes GS1 data using FNC1 characters.
|
ESCAPE_MODE | Process input data for escape sequences.
GS1PARENS_MODE | Parentheses (round brackets) used in input data instead of
| square brackets to delimit GS1 Application Identifiers
| (parentheses must not otherwise occur in the data).
------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Value | Effect
-------------------------------------------------------------------------------
DATA_MODE | Uses full ASCII range interpreted as Latin-1 or binary data.
UNICODE_MODE | Uses pre-formatted UTF-8 input.
GS1_MODE | Encodes GS1 data using FNC1 characters.
----------------|--------------------------------------------------------------
ESCAPE_MODE | Process input data for escape sequences.
GS1PARENS_MODE | Parentheses (round brackets) used in input data instead of
| square brackets to delimit GS1 Application Identifiers
| (parentheses must not otherwise occur in the data).
GS1NOCHECK_MODE | Do not check GS1 data for validity, i.e. suppress checks for
| valid AIs and data lengths. Invalid characters (e.g.
| control characters, extended ASCII characters) are still
| checked for.
-------------------------------------------------------------------------------
The default mode is DATA_MODE.
DATA_MODE, UNICODE_MODE and GS1_MODE are mutually exclusive, whereas ESCAPE_MODE
and GS1PARENS_MODE are optional. So, for example, you can set
DATA_MODE, UNICODE_MODE and GS1_MODE are mutually exclusive, whereas ESCAPE_MODE,
GS1PARENS_MODE and GS1NOCHECK_MODE are optional. So, for example, you can set
my_symbol->input_mode = UNICODE_MODE | ESCAPE_MODE;
or
my_symbol->input_mode = GS1_MODE | GS1PARENS_MODE;
my_symbol->input_mode = GS1_MODE | GS1PARENS_MODE | GS1NOCHECK_MODE;
whereas
my_symbol->input_mode = DATA_MODE | GS1_MODE;
is not valid. Permissible escape sequences are listed in section 4.1. An
example of GS1PARENS_MODE usage is given in section 6.1.11.3.
is not valid.
Permissible escape sequences are listed in section 4.1. An example of
GS1PARENS_MODE usage is given in section 6.1.11.3.
GS1NOCHECK_MODE is for use with legacy systems that have data that does not
conform to the current GS1 standard. Non-printable ASCII input is still checked
for, as is the validity of GS1 data specified without AIs (e.g. linear data for
GS1 DataBar Omnidirectional/Limited/etc.).
5.11 Verifying Symbology Availability
-------------------------------------