102 lines
3.1 KiB
Plaintext
102 lines
3.1 KiB
Plaintext
Postgres int8
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Thomas G. Lockhart <Thomas.Lockhart@jpl.nasa.gov>
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This is a first attempt at 64-bit integer arithmetic for Postgres. The code
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should support any 64-bit architecture and any 32-bit machine using a recent
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GNU C compiler. At the moment, DEC-Alpha and Linux/gcc are explicitly
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supported. The code uses "long long int" support in GNU C on 32-bit machines.
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This type is an extension to ANSI-C, and may not appear on any other compiler.
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The modules are built and installed as user-defined types, so destination
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directories are pointing away from the standard Postgres areas.
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Other compilers and architectures should be supportable, so please let me know
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what changes were required to run on your machine, and I will fold those into
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this standard distribution.
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Good luck!
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- Tom
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Installation
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You will need to modify the Makefile paths to fit your machine. Since this
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is packaged as a "user-installable" type, the libraries and source code
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can reside outside of the standard Postgres areas.
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If you are compiling on a DEC-Alpha, then the code might compile
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and run without change. (I do a lot of code development on Alphas,
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but do not have a Postgres installation to test).
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make
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make install
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psql dbname < int8.sql
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If you are running gcc on a 32-bit machine, you will probably need to:
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- remove the extra library reference in the Makefile.
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- if there are unresolved symbols when you try running, then find
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the right library. The one I had chosen might be a clue.
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If you are not running gcc on a 32-bit machine, you will need to:
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- redeclare the 64 bit data type.
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- modify the scanf and printf() arguments to use the appropriate
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64-bit int arguments.
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On my Linux box, I had to find an extra library for the division function.
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For Alpha boxes, both the DEC and GNU compilers should need "long int" only.
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I have a reference to "__alpha" in the C source code, but have not tested it
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and am not certain that this is the correct pre-defined symbol for that machine.
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itest.sql is a small test file which exercises some of the I/O, functions,
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and boolean operators.
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int8:
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=
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<>
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<
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>
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<=
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>=
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- unary minus
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+ addition
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- subtraction
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* multiplication
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/ division
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int4() convert to 4-byte integer
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float8() convert to double float
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Routines defined are:
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int64 *int8in(char *str);
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char *int8out(int64 *val);
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bool int8eq(int64 *val1, int64 *val2);
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bool int8ne(int64 *val1, int64 *val2);
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bool int8lt(int64 *val1, int64 *val2);
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bool int8gt(int64 *val1, int64 *val2);
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bool int8le(int64 *val1, int64 *val2);
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bool int8ge(int64 *val1, int64 *val2);
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bool int84eq(int64 *val1, int32 val2);
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bool int84ne(int64 *val1, int32 val2);
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bool int84lt(int64 *val1, int32 val2);
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bool int84gt(int64 *val1, int32 val2);
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bool int84le(int64 *val1, int32 val2);
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bool int84ge(int64 *val1, int32 val2);
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int64 *int8um(int64 *val);
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int64 *int8pl(int64 *val1, int64 *val2);
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int64 *int8mi(int64 *val1, int64 *val2);
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int64 *int8mul(int64 *val1, int64 *val2);
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int64 *int8div(int64 *val1, int64 *val2);
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int64 *int48(int32 val);
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int32 int84(int64 *val);
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int64 *dtoi8(float8 *val);
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float8 *i8tod(int64 *val);
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