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function-help checkpoint

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John Kerl 2015-06-03 18:32:13 -04:00
parent e249b83cb0
commit 51b606bdb5
1 changed files with 45 additions and 39 deletions
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84
c/mapping/lrec_evaluators.c
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@ -536,55 +536,61 @@ lrec_evaluator_t* lrec_evaluator_alloc_from_zary_func_name(char* function_name)
}
// ================================================================
typedef void function_usage_func_t(FILE* output_stream);
typedef struct _arity_lookup_t {
char* function_name;
int arity;
function_usage_func_t *pusage_func;
char* usage_string;
} arity_lookup_t;
// maybe just put strings here???????????
// or better: string & usage-func ptrs; invoke the latter if the former is null.
static arity_lookup_t ARITY_LOOKUP_TABLE[] = {
{ "systime", 0 },
{ "urand", 0 },
{ "systime", 0 , NULL, "Floating-point seconds since the epoch." },
{ "urand", 0 , NULL, "Floating-point numbers on the unit interval. Int-valued example: '$y=floor(20+urand()*11)'." },
{ "-", 1 },
{ "!", 1 },
{ "abs", 1 },
{ "ceil", 1 },
{ "cos", 1 },
{ "exp", 1 },
{ "floor", 1 },
{ "gmt2sec", 1 },
{ "log", 1 },
{ "log10", 1 },
{ "round", 1 },
{ "sec2gmt", 1 },
{ "sin", 1 },
{ "sqrt", 1 },
{ "strlen", 1 },
{ "tan", 1 },
{ "tolower", 1 },
{ "toupper", 1 },
{ "-", 1 , NULL, "Unary minus."},
{ "!", 1 , NULL, "Logical negation."},
{ "abs", 1 , NULL, "Absolute value"},
{ "ceil", 1 , NULL, "Ceiling."},
{ "cos", 1 , NULL, "Cosine."},
{ "exp", 1 , NULL, "Exponential function e**x."},
{ "floor", 1 , NULL, "Floor."},
{ "gmt2sec", 1 , NULL, "xxx."},
{ "log", 1 , NULL, "Natural (base-e) logarithm."},
{ "log10", 1 , NULL, "Base-10 logarithm."},
{ "round", 1 , NULL, "Integer round."},
{ "sec2gmt", 1 , NULL, "xxx."},
{ "sin", 1 , NULL, "Sine."},
{ "sqrt", 1 , NULL, "Square root."},
{ "strlen", 1 , NULL, "String length."},
{ "tan", 1 , NULL, "Tangent."},
{ "tolower", 1 , NULL, "Convert string to lowercase."},
{ "toupper", 1 , NULL, "Convert string to uppercase."},
{ "&&", 2 },
{ "||", 2 },
{ "==", 2 },
{ "!=", 2 },
{ ">", 2 },
{ ">=", 2 },
{ "<", 2 },
{ "<=", 2 },
{ ".", 2 },
{ "+", 2 },
{ "-", 2 },
{ "*", 2 },
{ "/", 2 },
{ "**", 2 },
{ "%", 2 },
{ "atan2", 2 },
{ "pow", 2 },
{ "&&", 2 , NULL, "Logical AND."},
{ "||", 2 , NULL, "Logical OR."},
{ "==", 2 , NULL, "xxx."},
{ "!=", 2 , NULL, "xxx."},
{ ">", 2 , NULL, "xxx."},
{ ">=", 2 , NULL, "xxx."},
{ "<", 2 , NULL, "xxx."},
{ "<=", 2 , NULL, "xxx."},
{ ".", 2 , NULL, "String concatenation."},
{ "+", 2 , NULL, "Addition."},
{ "-", 2 , NULL, "Subtraction."},
{ "*", 2 , NULL, "Multiplication."},
{ "/", 2 , NULL, "Division."},
{ "**", 2 , NULL, "Exponentiation; same as pow."},
{ "%", 2 , NULL, "Remainder; never negative-valued."},
{ "atan2", 2 , NULL, "Two-argument arctangent."},
{ "pow", 2 , NULL, "Exponentiation; same as **."},
{ "sub", 3 },
{ "sub", 3 , NULL, "xxx."},
{ NULL, -1 }, // null terminator
{ NULL, -1 , NULL, NULL}, // table terminator
};
#define ARITY_CHECK_PASS 0xbb