The parser generates a call to error/0 on break. Having that exported
from C directly removes a language dependency on builtin.jq.
In any case, error/0 seems to be the more fundamental operation, seeing
as the old C impementation of error/1 did nothing useful with its input.
The distinction between input/0 and _input/0 has been unnecessary since
a9c613..7dc34b, which moved end-of-input handling into C and replaced
the jq definition of input with `def input: _input;`
If these values do not match exactly, it is because the UTF-8 is invalid
anyway and we counted codepoints differently than oniguruma did. Perhaps it
would be better to error out here, but at least one similar loop already
uses < vs != and since we're off the rails anyway this might be OK. It is
certainly better than overruning the buffer.
Resolves https://github.com/stedolan/jq/issues/1804
my_timegm was introduced in 1900c7 to add a mktime fallback used in
4a6241, the subsequently removed in c53823. As a result of this code
shuffling, the jq mktime function (f_mktime) wound up using a fallback
even on systems where timegm is available, with incorrect results in
some time zones with DST, e.g.
% TZ=America/New_York jq -n '"2018-08-31T00:00:00Z"|fromdate|todate'
"2018-08-31T01:00:00Z"
This undoes 1900c7 and moves the workaround it added into the #else of
my_mktime.
Replace uses of the nonstandard $^ variable by explicitly specifying the
source filenames. This is the only obvious thing preventing the build
from running correctly on non-GNU make.
"Undefined symbols are not allowed in x86_64-w64-mingw32 shared libraries"
This was also applied in the official MINGW-packages repo:
Alexpux/MINGW-packages@b5566c58a
* Set default error code to -4 in main(), Fixes#1142
* fix --exit-code with more than one object in input, Fixes#1139
- Return code 1 or 4 based on last output, not last input.
Users are often surprised by the requirement to parenthesize any
non-trivial object key expressions in object constructors. E.g.,
{"a"+"b":1}. This commit adds one more kind of key expression besides
literals and idents: variable references.
A common use case for this is jq programs as JSON templates to fill in
with variables computed from inputs or passed in on the command-line.
E.g., {some_key:$value}. Now users can also use, e.g., {$key:$value}.
This and the restrictions on key and value expressions in object
constructors are now clarified a bit in the documentation.
We had config machinery that determined which math functions are
available in libc. If a c math function was missing on the host system,
then the corresponding jq function would be removed from the source,
enabling the build to proceed anyway. The detection machinery was broken
in a subtle way, as was shown after glibc updated to 2.27, dropping the
`pow10` function. This caused compilation to fail.
The essential problem was that we detected whether a math function was
available by compiling and linking a small program evaluating that
function on constants. However, since gcc's optimization machinery has
special knowledge of some math functions (e.g. `pow10`), it can
optimize them away, even if they don't exist in the library and are not
linkable. That is, the following example compiles and links against
glibc 2.27, even though `pow10` has been removed:
```
int main () {
printf("%f", pow10(0.5));
return 0;
}
```
What?!
On the other hand, this program does not link:
```
int main () {
double f;
printf("%f", &f);
printf("%f", pow10(f));
return 0;
}
```
In the first program the call to `pow10` can be optimized away as a
constant expression. This requires GCC to know about `pow10` (which it
does!), but it does not require `pow10` to be in the library (and
actually linkable).
The solution is to use autoconf's machinery for detecting function
presence, instead of our own (buggy) machinery. This has the added
benefit of simplifying the code.
The bug was reported in issue #1659
JV_PRINT_COLOUR was part of the public libjq headers and was removed as
part of 2d05b54. While JV_PRINT_COLOR is definitely the preferred
spelling this side of the pond, we shouldn't just remove otherwise
exposed enum values.
Attempting to use the existing FORK_OPT opcode resulted in difficulty
knowing when to pop an error message off the stack and when not to. This
commit makes DESTRUCTURE_ALT a real opcode that is identical to
FORK_OPT, except for never pushing the error message onto the stack when
continuing from an error backtrack.
Some small changes were necessary to the DUP/POP behavior surrounding
destructuring to accomodate this.
Not all stdio implementations disallow one to open a directory with
fopen(3) and so we specifically check for directories as it is also
in the standard search path.
Nicolas Williams