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Bug #2299

closed

std::snprintf not found in buggy STL implementations

Added by Alex Afanasyev about 10 years ago. Updated over 9 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Alex Afanasyev
Category:
Build
Target version:
v0.4
Start date:
Due date:
% Done:

100%

Estimated time:

Description

At least with cygwin, does not properly define std::snprintf, but C's version ::snprintf is still available.

I'm proposing changing instances of std::snprintf with the following:

// inside function body
using namespace std;
snprintf(...);

Files

snprintf.patch (1.36 KB) snprintf.patch Mathias Gibbens, 04/13/2015 11:08 AM
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 #1

Updated by Junxiao Shi about 10 years ago

I disagree with the proposed solution. using namespace should be avoided.

  1. check for std::snprintf during configure step
  2. in common.hpp, declare std::snprintf as a function that forwards its arguments to ::snprintf
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 #2

Updated by Alex Afanasyev about 10 years ago

This technique is used in many places in boost libraries and I don't see problem with that.

We can check during configure stage, but then it is just more complicated to use, while there is a simple solution that should solve all the problems.

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 #3

Updated by Junxiao Shi about 10 years ago

What about using ::snprintf everywhere?

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 #4

Updated by Alex Afanasyev about 10 years ago

I could be ok with that

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 #5

Updated by Alex Afanasyev about 10 years ago

I decided to reject this task, as it is just a really buggy cygwin implementation. Code can be compiled with addition of a few defines.

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 #6

Updated by Alex Afanasyev about 10 years ago

  • Status changed from New to Rejected
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 #7

Updated by Alex Afanasyev about 10 years ago

  • Status changed from Rejected to New

I'm reopening this, as android compilation has exactly the same problem, and unfortunately I cannot fix it with a few extra defines.

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 #8

Updated by Davide Pesavento about 10 years ago

Just use the C version, as it was before we moved to C++11.

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 #9

Updated by Alex Afanasyev about 10 years ago

  • Assignee set to Alex Afanasyev
  • Target version set to v0.3

Will replace with C version of snprintf

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 #10

Updated by Alex Afanasyev almost 10 years ago

  • Status changed from New to In Progress
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 #11

Updated by Alex Afanasyev almost 10 years ago

  • Status changed from In Progress to Code review
  • % Done changed from 0 to 100
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 #12

Updated by Alex Afanasyev almost 10 years ago

  • Status changed from Code review to In Progress
  • % Done changed from 100 to 70

Similar fix needs to be done in NFD codebase. Will submit new patch later.

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 #13

Updated by Alex Afanasyev almost 10 years ago

  • Status changed from In Progress to Code review
  • % Done changed from 70 to 100
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 #14

Updated by Junxiao Shi almost 10 years ago

  • Status changed from Code review to Closed
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 #15

Updated by Mathias Gibbens over 9 years ago

I hit this problem today using OpenWRT's build toolchain (gcc 4.8.3) when cross-compiling NFD 0.3.1. There is a usage of std::snprintf in ./daemon/face/ethernet-face.cpp that is causing the same problem. Alex's previous patch only fixed the issue in ./core/logger.cpp. There are no other occurrences of snprintf in the NFD 0.3.1 code.

Can we get a fix for this included in the next NFD release?

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 #16

Updated by Junxiao Shi over 9 years ago

  • Status changed from Closed to Feedback
  • Target version changed from v0.3 to v0.4

Reopening as requested by a Mathias.

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 #17

Updated by Alex Afanasyev over 9 years ago

@Mathias Can you submit your patch for the code review?

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 #18

Updated by Mathias Gibbens over 9 years ago

Here is a patch against the current NFD master branch that fixes the issue. It is modeled after Alex's previous two patches.

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 #19

Updated by Alex Afanasyev over 9 years ago

@Mathias, can you please push your patchset to http://gerrit.named-data.net/?

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 #20

Updated by Mathias Gibbens over 9 years ago

@Alex, I don't have an account setup for the project's Gerrit. This is such a small patch that I'd like to not go through the trouble of setting up another account just to commit it. I'd be fine with either you or Junxiao committing it.

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 #21

Updated by Alex Afanasyev over 9 years ago

  • Status changed from Feedback to Code review
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 #22

Updated by Junxiao Shi over 9 years ago

  • Status changed from Code review to Closed
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