This package offers both a portable {py3} module and a command-line
tool.
-WARNING: This version of Normand is 0.20, meaning both the Normand
+WARNING: This version of Normand is 0.21, meaning both the Normand
language and the module/CLI interface aren't stable.
ifdef::env-github[]
ff ff ff ff ff ff ff ff c8 ┆ •••••••••
----
+Transformation::
++
+Input:
++
+----
+"end of file @ " {end:8}
+
+!transform gzip
+ "this part will be gzipped"
+!end
+
+<end>
+----
++
+Output:
++
+----
+65 6e 64 20 6f 66 20 66 69 6c 65 20 40 20 3c 1f ┆ end of file @ <•
+8b 08 00 7b 7b 26 65 02 ff 2b c9 c8 2c 56 28 48 ┆ •••{{&e••+••,V(H
+2c 2a 51 28 cf cc c9 51 48 4a 55 48 af ca 2c 28 ┆ ,*Q(•••QHJUH••,(
+48 4d 01 00 d4 cc 5b 8a 19 00 00 00 ┆ HM••••[•••••
+----
+
Multilevel grouping::
+
Input:
* A <<repetition-block,repetition block>>.
+* A <<transformation-block,transformation block>>.
+
* A <<macro-definition-block,macro definition block>>.
* A <<macro-expansion,macro expansion>>.
For a fixed-length number at some source location{nbsp}__**L**__, this
expression may contain the name of any accessible <<label,label>> (not
within a nested group), including the name of a label defined
-after{nbsp}__**L**__, as well as the name of any
-<<variable-assignment,variable>> known at{nbsp}__**L**__.
+after{nbsp}__**L**__ (except within an <<encoded-block,encoded block>>),
+as well as the name of any <<variable-assignment,variable>> known
+at{nbsp}__**L**__.
+
The value of the special name `ICITTE` (`int` type) in this expression
is the <<cur-offset,current offset>> (before encoding the number).
. The `(`, `!group`, or `!g` opening.
-. Zero or more items.
+. Zero or more items except, recursively, a macro definition block.
. Depending on the group opening:
+
For the name `__NAME__`, this is equivalent to the
`pass:[{]__NAME__pass:[}]` form above.
-. Zero or more items to be handled when the condition is true.
+. Zero or more items to be handled when the condition is true
+ except, recursively, a macro definition block.
. **Optional**:
.. The `!else` opening.
-.. Zero or more items to be handled when the condition is false.
+.. Zero or more items to be handled when the condition is false
+ except, recursively, a macro definition block
. The `!end` closing.
For the name `__NAME__`, this is equivalent to the
`pass:[{]__NAME__pass:[}]` form above.
-. Zero or more items.
+. Zero or more items except, recursively, a macro definition block.
. The `!end` closing.
----
====
+=== Transformation block
+
+A _transformation block_ represents the bytes of one or more items
+transformed into other bytes by a function.
+
+As of this version, Normand only offers a predetermined set of
+transformation functions.
+
+An encoded block is:
+
+. The `!transform` or `!t` opening.
+
+. A transformation function name amongst:
++
+--
+[horizontal]
+`base64`::
+`b64`::
+ Standard https://datatracker.ietf.org/doc/html/rfc4648.html#section-4[Base64].
+
+`base64u`::
+`b64u`::
+ URL-safe Base64, using `-` instead of `pass:[+]` and `_` instead of
+ `/`.
+
+`base32`::
+`b32`::
+ Standard https://datatracker.ietf.org/doc/html/rfc4648.html#section-6[Base32].
+
+`base16`::
+`b16`::
+ Standard https://datatracker.ietf.org/doc/html/rfc4648.html#section-8[Base16].
+
+`ascii85`::
+`a85`::
+ https://en.wikipedia.org/wiki/Ascii85[Ascii85] without padding.
+
+`ascii85p`::
+`a85p`::
+ Ascii85 with padding.
+
+`base85`::
+`b85`::
+ https://en.wikipedia.org/wiki/Ascii85[Base85] (like Git-style binary
+ diffs) without padding.
+
+`base85p`::
+`b85p`::
+ Base85 with padding.
+
+`quopri`::
+`qp`::
+ MIME
+ https://datatracker.ietf.org/doc/html/rfc2045#section-6.7[quoted-printable]
+ without quoted whitespaces.
+
+`quoprit`::
+`qpt`::
+ MIME quoted-printable with quoted whitespaces.
+
+`gzip`::
+`gz`::
+ https://en.wikipedia.org/wiki/Gzip[gzip].
+
+`bzip2`::
+`bz2`::
+ https://en.wikipedia.org/wiki/Bzip2[bzip2].
+--
+
+. Zero or more items except, recursively, a macro definition block.
++
+Any {py3} expression within any of those items may not refer to a future
+<<label,label>>.
++
+The value of the special name `ICITTE` in any {py3} expression within
+any of those items is the <<cur-offset,current offset>> _before_ Normand
+applies the transformation function. Therefore, labels defined within
+those items also have the current offset value _before_ Normand applies
+the transformation function.
+
+. The `!end` closing.
+
+The <<cur-offset,current offset>> after having handled the last item of
+a transformation block is the value of the current offset before
+handling the first item plus the size of the generated (transformed)
+bytes. In other words, <<current-offset-setting,current offset
+settings>> within the items of the block have no impact outside said
+block.
+
+====
+Input:
+
+----
+aa bb cc dd
+
+"size of compressed section: " {end - start : 8}
+
+<start>
+
+!transform bzip2
+ "this will be compressed!"
+ 89*100 00*5000
+!end
+
+<end>
+
+"yes!"
+----
+
+Output:
+
+----
+aa bb cc dd 73 69 7a 65 20 6f 66 20 63 6f 6d 70 ┆ ••••size of comp
+72 65 73 73 65 64 20 73 65 63 74 69 6f 6e 3a 20 ┆ ressed section:
+52 42 5a 68 39 31 41 59 26 53 59 68 e1 8c fc 00 ┆ RBZh91AY&SYh••••
+00 33 d1 e0 c0 00 60 00 5e 66 dc 80 00 20 00 80 ┆ •3••••`•^f••• ••
+00 08 20 00 31 40 d3 43 23 26 20 ca 87 a9 a1 e8 ┆ •• •1@•C#& •••••
+18 29 44 80 9c 80 49 bf cc b3 e8 45 ed e2 76 ad ┆ •)D•••I••••E••v•
+0f 12 8b 8a d6 cd 40 04 7e 2e e4 8a 70 a1 20 d1 ┆ ••••••@•~.••p• •
+c3 19 f8 79 65 73 21 ┆ •••yes!
+----
+====
+
+====
+Input:
+
+----
+88*16
+
+!t a85
+ "I am determined to be cheerful and happy in whatever situation "
+ "I may find myself. For I have learned that the greater part of "
+ "our misery or unhappiness is determined not by our circumstance "
+ "but by our disposition."
+!end
+
+@128~99h
+
+!t qp <beg> {ICITTE - beg : 8} * 50 !end
+----
+
+Output:
+
+----
+88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 ┆ ••••••••••••••••
+38 4b 5f 47 59 2b 43 6f 26 2a 41 54 44 58 25 44 ┆ 8K_GY+Co&*ATDX%D
+49 6d 3f 24 46 44 69 3a 32 41 4b 59 4a 72 41 53 ┆ Im?$FDi:2AKYJrAS
+23 6d 6f 46 5f 69 31 2f 44 49 61 6c 27 40 3b 70 ┆ #moF_i1/DIal'@;p
+31 32 2b 44 47 5e 39 47 41 28 45 2c 41 54 68 58 ┆ 12+DG^9GA(E,AThX
+2a 2b 45 4d 37 3d 46 5e 5d 42 2b 44 66 2d 5b 68 ┆ *+EM7=F^]B+Df-[h
+2b 44 6b 50 34 2b 44 2c 3e 2a 41 30 3e 60 37 46 ┆ +DkP4+D,>*A0>`7F
+28 4b 30 22 2f 67 2a 57 25 45 5a 64 70 72 42 4f ┆ (K0"/g*W%EZdprBO
+51 27 71 2b 44 62 55 74 45 63 2c 48 21 2b 45 56 ┆ Q'q+DbUtEc,H!+EV
+3a 2a 46 3c 47 5b 3d 41 4b 59 57 2b 41 52 54 5b ┆ :*F<G[=AKYW+ART[
+6c 45 5a 66 3d 30 45 63 60 46 42 41 66 75 23 37 ┆ lEZf=0Ec`FBAfu#7
+45 5a 66 34 35 46 28 4b 42 3b 2b 45 29 39 43 46 ┆ EZf45F(KB;+E)9CF
+60 28 6c 24 45 2c 5d 4e 2f 41 54 4d 6f 38 42 6c ┆ `(l$E,]N/ATMo8Bl
+62 44 2d 41 54 56 4c 28 44 2f 21 6d 21 41 30 3e ┆ bD-ATVL(D/!m!A0>
+63 2e 46 3c 47 25 3c 2b 45 29 43 43 2b 43 66 2c ┆ c.F<G%<+E)CC+Cf,
+2b 40 73 29 58 30 46 43 42 26 73 41 4b 59 48 29 ┆ +@s)X0FCB&sAKYH)
+46 3c 47 25 3c 2b 45 29 43 43 2b 43 6f 32 2d 45 ┆ F<G%<+E)CC+Co2-E
+2c 54 66 33 46 44 35 5a 32 2f 63 99 99 99 99 99 ┆ ,Tf3FD5Z2/c•••••
+3d 30 30 3d 30 31 3d 30 32 3d 30 33 3d 30 34 3d ┆ =00=01=02=03=04=
+30 35 3d 30 36 3d 30 37 3d 30 38 3d 30 39 0a 3d ┆ 05=06=07=08=09•=
+30 42 3d 30 43 0d 3d 30 45 3d 30 46 3d 31 30 3d ┆ 0B=0C•=0E=0F=10=
+31 31 3d 31 32 3d 31 33 3d 31 34 3d 31 35 3d 31 ┆ 11=12=13=14=15=1
+36 3d 31 37 3d 31 38 3d 31 39 3d 31 41 3d 31 42 ┆ 6=17=18=19=1A=1B
+3d 31 43 3d 31 44 3d 31 45 3d 31 46 20 21 22 23 ┆ =1C=1D=1E=1F !"#
+24 25 26 27 28 29 2a 2b 2c 2d 3d 0a 2e 2f 30 31 ┆ $%&'()*+,-=•./01
+----
+====
+
=== Macro definition block
A _macro definition block_ associates a name and parameter names to
** An <<leb128-integer,LEB128 integer>>.
** A <<string,string>>.
** A <<macro-expansion,macro-expansion>>.
+** A <<transformation-block,transformation block>>.
** A <<group,group>>.
. The ``pass:[*]`` character.
projects / normand.git / blobdiff