How to read %%Pages:… from *.xbb file

Given the auxiliary file test.xbb

%%Title: test.pdf

%%Creator: extractbb 20180506

%%BoundingBox: 0 0 300 343

%%HiResBoundingBox: 0.000000 0.000000 300.290000 342.810000

%%PDFVersion: 1.4

%%Pages: 17

%%CreationDate: Mon Jan  7 18:06:49 2019

produced from input file test.pdf using the extractbb utility

extractbb test.pdf

Is there an easy way to read the value of the %%Pages: key from test.xbb by means of some internal command defined in the graphics package? I know that graphics parses user provided xbb files in order to determine bounding-box coordinates for binary-type or compressed image files that TeX cannot read on its own. Can it do the same for %%Pages: out of the box?

asked 4 hours ago

AlexG

32.3k479143

1

Are you interested in Get number of pages of external PDF?
– Werner
4 hours ago

Yes, but without using pdftex, luatex, xetex, just by reading xbb while running (pdf|lua)latex in DVI mode.
– AlexG
4 hours ago

I see nothing in the code. It wouldn't imho be very difficult to add it, but can't you read the xbb yourself?
– Ulrike Fischer
4 hours ago

@UlrikeFischer : Thank you. It would be nice if such a thing would already exist, but maybe I will have to homebrew something myself based on graphics code.
– AlexG
4 hours ago

actually main thing you'd have to change is the code that makes it stop reading the file once it has found a bounding box.... although if you know it's a xbb file with that format rather than arbitrary eps file, it might be as easy to simply input it rather than use the read loop from graphics
– David Carlisle
3 hours ago

|
show 3 more comments

Given the auxiliary file test.xbb

%%Title: test.pdf

%%Creator: extractbb 20180506

%%BoundingBox: 0 0 300 343

%%HiResBoundingBox: 0.000000 0.000000 300.290000 342.810000

%%PDFVersion: 1.4

%%Pages: 17

%%CreationDate: Mon Jan  7 18:06:49 2019

produced from input file test.pdf using the extractbb utility

extractbb test.pdf

asked 4 hours ago

AlexG

32.3k479143

1

Are you interested in Get number of pages of external PDF?
– Werner
4 hours ago

Yes, but without using pdftex, luatex, xetex, just by reading xbb while running (pdf|lua)latex in DVI mode.
– AlexG
4 hours ago

I see nothing in the code. It wouldn't imho be very difficult to add it, but can't you read the xbb yourself?
– Ulrike Fischer
4 hours ago

@UlrikeFischer : Thank you. It would be nice if such a thing would already exist, but maybe I will have to homebrew something myself based on graphics code.
– AlexG
4 hours ago

actually main thing you'd have to change is the code that makes it stop reading the file once it has found a bounding box.... although if you know it's a xbb file with that format rather than arbitrary eps file, it might be as easy to simply input it rather than use the read loop from graphics
– David Carlisle
3 hours ago

|
show 3 more comments

Given the auxiliary file test.xbb

%%Title: test.pdf

%%Creator: extractbb 20180506

%%BoundingBox: 0 0 300 343

%%HiResBoundingBox: 0.000000 0.000000 300.290000 342.810000

%%PDFVersion: 1.4

%%Pages: 17

%%CreationDate: Mon Jan  7 18:06:49 2019

produced from input file test.pdf using the extractbb utility

extractbb test.pdf

asked 4 hours ago

AlexG

32.3k479143

Given the auxiliary file test.xbb

%%Title: test.pdf

%%Creator: extractbb 20180506

%%BoundingBox: 0 0 300 343

%%HiResBoundingBox: 0.000000 0.000000 300.290000 342.810000

%%PDFVersion: 1.4

%%Pages: 17

%%CreationDate: Mon Jan  7 18:06:49 2019

produced from input file test.pdf using the extractbb utility

extractbb test.pdf

graphics pdf

asked 4 hours ago

AlexG

32.3k479143

asked 4 hours ago

AlexG

32.3k479143

asked 4 hours ago

AlexG

32.3k479143

asked 4 hours ago

AlexG

32.3k479143

asked 4 hours ago

AlexG

32.3k479143

1

Are you interested in Get number of pages of external PDF?
– Werner
4 hours ago

Yes, but without using pdftex, luatex, xetex, just by reading xbb while running (pdf|lua)latex in DVI mode.
– AlexG
4 hours ago

I see nothing in the code. It wouldn't imho be very difficult to add it, but can't you read the xbb yourself?
– Ulrike Fischer
4 hours ago

@UlrikeFischer : Thank you. It would be nice if such a thing would already exist, but maybe I will have to homebrew something myself based on graphics code.
– AlexG
4 hours ago

actually main thing you'd have to change is the code that makes it stop reading the file once it has found a bounding box.... although if you know it's a xbb file with that format rather than arbitrary eps file, it might be as easy to simply input it rather than use the read loop from graphics
– David Carlisle
3 hours ago

|
show 3 more comments

1

Are you interested in Get number of pages of external PDF?
– Werner
4 hours ago

Yes, but without using pdftex, luatex, xetex, just by reading xbb while running (pdf|lua)latex in DVI mode.
– AlexG
4 hours ago

I see nothing in the code. It wouldn't imho be very difficult to add it, but can't you read the xbb yourself?
– Ulrike Fischer
4 hours ago

@UlrikeFischer : Thank you. It would be nice if such a thing would already exist, but maybe I will have to homebrew something myself based on graphics code.
– AlexG
4 hours ago

actually main thing you'd have to change is the code that makes it stop reading the file once it has found a bounding box.... although if you know it's a xbb file with that format rather than arbitrary eps file, it might be as easy to simply input it rather than use the read loop from graphics
– David Carlisle
3 hours ago

Are you interested in Get number of pages of external PDF?
– Werner
4 hours ago

Yes, but without using pdftex, luatex, xetex, just by reading xbb while running (pdf|lua)latex in DVI mode.
– AlexG
4 hours ago

I see nothing in the code. It wouldn't imho be very difficult to add it, but can't you read the xbb yourself?
– Ulrike Fischer
4 hours ago

@UlrikeFischer : Thank you. It would be nice if such a thing would already exist, but maybe I will have to homebrew something myself based on graphics code.
– AlexG
4 hours ago

actually main thing you'd have to change is the code that makes it stop reading the file once it has found a bounding box.... although if you know it's a xbb file with that format rather than arbitrary eps file, it might be as easy to simply input it rather than use the read loop from graphics
– David Carlisle
3 hours ago

|
show 3 more comments

1 Answer
1

active

oldest

votes

enter image description here

documentclass{article}



begin{document}





{%

def%#1:#2@{expandafterxdefcsname ZZ#1endcsname{#2}}%

endlinechar`@ %

catcode`%=0 sbox0{input{test.xbb}}}%





Pages: ZZPages

end{document}

edited 3 hours ago

answered 3 hours ago

David Carlisle

483k4011171858

Oh my, you are the greatest! Thank you!
– AlexG
3 hours ago

Would you please explain why input must be placed into an sbox? To prevent any typeset output?
– AlexG
3 hours ago

@AlexG try without:-) yes as you say it throws away any accidental typeset result, in fact you get a typeset @ from the final newline, which could be avoided in other ways but....
– David Carlisle
3 hours ago

Ok. Very smart! And what about the double percent sign in the input? I can see only one % in def%...
– AlexG
3 hours ago

@AlexG if % has catcode 0 (escape character ) then %% references the same command as % the command with name % just as \ references the command with name
– David Carlisle
3 hours ago

|
show 3 more comments

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

enter image description here

documentclass{article}



begin{document}





{%

def%#1:#2@{expandafterxdefcsname ZZ#1endcsname{#2}}%

endlinechar`@ %

catcode`%=0 sbox0{input{test.xbb}}}%





Pages: ZZPages

end{document}

edited 3 hours ago

answered 3 hours ago

David Carlisle

483k4011171858

Oh my, you are the greatest! Thank you!
– AlexG
3 hours ago

Would you please explain why input must be placed into an sbox? To prevent any typeset output?
– AlexG
3 hours ago

@AlexG try without:-) yes as you say it throws away any accidental typeset result, in fact you get a typeset @ from the final newline, which could be avoided in other ways but....
– David Carlisle
3 hours ago

Ok. Very smart! And what about the double percent sign in the input? I can see only one % in def%...
– AlexG
3 hours ago

@AlexG if % has catcode 0 (escape character ) then %% references the same command as % the command with name % just as \ references the command with name
– David Carlisle
3 hours ago

|
show 3 more comments

enter image description here

documentclass{article}



begin{document}





{%

def%#1:#2@{expandafterxdefcsname ZZ#1endcsname{#2}}%

endlinechar`@ %

catcode`%=0 sbox0{input{test.xbb}}}%





Pages: ZZPages

end{document}

edited 3 hours ago

answered 3 hours ago

David Carlisle

483k4011171858

Oh my, you are the greatest! Thank you!
– AlexG
3 hours ago

Would you please explain why input must be placed into an sbox? To prevent any typeset output?
– AlexG
3 hours ago

@AlexG try without:-) yes as you say it throws away any accidental typeset result, in fact you get a typeset @ from the final newline, which could be avoided in other ways but....
– David Carlisle
3 hours ago

Ok. Very smart! And what about the double percent sign in the input? I can see only one % in def%...
– AlexG
3 hours ago

@AlexG if % has catcode 0 (escape character ) then %% references the same command as % the command with name % just as \ references the command with name
– David Carlisle
3 hours ago

|
show 3 more comments

enter image description here

documentclass{article}



begin{document}





{%

def%#1:#2@{expandafterxdefcsname ZZ#1endcsname{#2}}%

endlinechar`@ %

catcode`%=0 sbox0{input{test.xbb}}}%





Pages: ZZPages

end{document}

edited 3 hours ago

answered 3 hours ago

David Carlisle

483k4011171858

enter image description here

documentclass{article}



begin{document}





{%

def%#1:#2@{expandafterxdefcsname ZZ#1endcsname{#2}}%

endlinechar`@ %

catcode`%=0 sbox0{input{test.xbb}}}%





Pages: ZZPages

end{document}

edited 3 hours ago

answered 3 hours ago

David Carlisle

483k4011171858

edited 3 hours ago

answered 3 hours ago

David Carlisle

483k4011171858

answered 3 hours ago

David Carlisle

483k4011171858

answered 3 hours ago

David Carlisle

483k4011171858

Oh my, you are the greatest! Thank you!
– AlexG
3 hours ago

Would you please explain why input must be placed into an sbox? To prevent any typeset output?
– AlexG
3 hours ago

@AlexG try without:-) yes as you say it throws away any accidental typeset result, in fact you get a typeset @ from the final newline, which could be avoided in other ways but....
– David Carlisle
3 hours ago

Ok. Very smart! And what about the double percent sign in the input? I can see only one % in def%...
– AlexG
3 hours ago

@AlexG if % has catcode 0 (escape character ) then %% references the same command as % the command with name % just as \ references the command with name
– David Carlisle
3 hours ago

|
show 3 more comments

Oh my, you are the greatest! Thank you!
– AlexG
3 hours ago

Would you please explain why input must be placed into an sbox? To prevent any typeset output?
– AlexG
3 hours ago

@AlexG try without:-) yes as you say it throws away any accidental typeset result, in fact you get a typeset @ from the final newline, which could be avoided in other ways but....
– David Carlisle
3 hours ago

Ok. Very smart! And what about the double percent sign in the input? I can see only one % in def%...
– AlexG
3 hours ago

@AlexG if % has catcode 0 (escape character ) then %% references the same command as % the command with name % just as \ references the command with name
– David Carlisle
3 hours ago

Oh my, you are the greatest! Thank you!
– AlexG
3 hours ago

Would you please explain why input must be placed into an sbox? To prevent any typeset output?
– AlexG
3 hours ago

@AlexG try without:-) yes as you say it throws away any accidental typeset result, in fact you get a typeset @ from the final newline, which could be avoided in other ways but....
– David Carlisle
3 hours ago

Ok. Very smart! And what about the double percent sign in the input? I can see only one % in def%...
– AlexG
3 hours ago

@AlexG if % has catcode 0 (escape character ) then %% references the same command as % the command with name % just as \ references the command with name
– David Carlisle
3 hours ago

|
show 3 more comments

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