parrotcode multiarray PMC
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src/pmc/multiarray.pmc

NAME

src/pmc/multiarray.pmc - Multi-dimensional Array

DESCRIPTION

MultiArray extends Array to provide a multi-dimensional array.

This is one way for calculating offsets in 2 dimensional space.

MULTIDIM CALC OFFSET

Algorithm:

    i + j*Ni + k*Ni*Nj + l*Ni*Nj*Nk ...

where i, j, k, l... are coordinates in a multidimensional space and Ni, Nj, Nk... are the lengths of the dimensions.

Limitations: the array can only expand in the last dimension The first (n-1) dimensions of a n-dimensional array are fixed and layed out at array creation.

Functions

static INTVAL calc_offset(PARROT_INTERP, List *list, PMC *key): Calculates the offset for *key.
void init(): Overrides the default in Array. There is no initialization.
INTVAL get_integer_keyed(PMC *key): Returns the integer value for *key.
FLOATVAL get_number_keyed(PMC *key): Returns the floating-point number value for *key.
STRING *get_string_keyed(PMC *key): Returns the Parrot string value for *key.
PMC *get_pmc_keyed(PMC *key): Returns the PMC value for *key.
void set_integer_keyed(PMC *key, INTVAL value): Sets the integer value value at *key.
void set_number_keyed(PMC *key, FLOATVAL value): Sets the floating-point number value value at *key.
void set_string_keyed(PMC *key, STRING *value): Sets the Parrot string value value at *key.
void set_pmc_keyed(PMC *dest_key, PMC *src): Unimplemented.

HISTORY

Initial revision by Josef Hook <joh@stacken.kth.se>

1.6 Based on list.c by Leopold Toetsch <lt@toetsch.at>