how to read int32 from buffer?

[lost22git]

(def buf (-> @""
             (buffer/push-uint32 :le 11)
             (buffer/push-uint32 :le 22)
             (buffer/push-uint32 :be 33)))

Is there a function for reading uint32 from the buffer?

[sogaiu]

How about the following?

(def buf 
  (-> @""
      (buffer/push-uint32 :le 11)
      (buffer/push-uint32 :le 22)
      (buffer/push-uint32 :be 33)))
# =>
@"\v\0\0\0\0\0\0!"

(peg/match ~(uint 4) buf)
# =>
@[11]

(peg/match ~(uint 4) buf 4)
# =>
@[22]

(peg/match ~(uint-be 4) buf 8)
# =>
@[33]

[lost22git]

Thanks, but i still can't get it why the functions in peg module rather than buffer module.

[sogaiu]

On a historical note, IIUC:

• the PEG specials uint and uint-be were added to janet in 2020-09 (45feb55) by bakpakin
• buffer/push-int32 and some of its friends were added in 2024-01 (197bb73) by pnelson