NAME ^

src/io/io_string.c - IO Layer for strings

DESCRIPTION ^

Capture output to a string PMC.

String Layer Functions ^

*/

#include "parrot/parrot.h" #include "io_private.h"

/* HEADERIZER HFILE: none */

/* HEADERIZER BEGIN: static */

static size_t PIO_string_read( SHIM_INTERP, NOTNULL(ParrotIOLayer *l), SHIM(ParrotIO *io), NOTNULL(STRING **buf) ) __attribute__nonnull__(2) __attribute__nonnull__(4);

static size_t PIO_string_write( PARROT_INTERP, NOTNULL(ParrotIOLayer *l), SHIM(ParrotIO *io), NOTNULL(STRING *s) ) __attribute__nonnull__(1) __attribute__nonnull__(2) __attribute__nonnull__(4);

/* HEADERIZER END: static */

static const ParrotIOLayerAPI pio_string_layer_api = { PIO_null_init, PIO_base_new_layer, PIO_base_delete_layer, PIO_null_push_layer, PIO_null_pop_layer, PIO_null_open, PIO_null_open2, PIO_null_open3, PIO_null_open_async, PIO_null_fdopen, PIO_null_close, PIO_string_write, PIO_null_write_async, PIO_string_read, PIO_null_read_async, PIO_null_flush, PIO_null_peek, PIO_null_seek, PIO_null_tell, PIO_null_setbuf, PIO_null_setlinebuf, PIO_null_getcount, PIO_null_fill, PIO_null_eof, NULL, /* no poll */ NULL, /* no socket */ NULL, /* no connect */ NULL, /* no send */ NULL, /* no recv */ NULL, /* no bind */ NULL, /* no listen */ NULL /* no accept */ };

ParrotIOLayer pio_string_layer = { NULL, "string", 0, &pio_string_layer_api, NULL, NULL };

PARROT_WARN_UNUSED_RESULT PARROT_CANNOT_RETURN_NULL ParrotIOLayer * PIO_string_register_layer(void) { return &pio_string_layer; }

static size_t PIO_string_read(SHIM_INTERP, NOTNULL(ParrotIOLayer *l), SHIM(ParrotIO *io), NOTNULL(STRING **buf)) { if (l->self == 0) return 0;

    *buf    = (STRING *)l->self;
    l->self = 0;

    return (*buf)->strlen;
}

static size_t PIO_string_write(PARROT_INTERP, NOTNULL(ParrotIOLayer *l), SHIM(ParrotIO *io), NOTNULL(STRING *s)) { STRING * const old_string = (STRING *)l->self;

    if (!old_string) {
        l->self = s;
        return s->strlen;
    }

    l->self = string_append(interp, old_string, s);
    return string_length(interp, (STRING *)l->self);
}

/*

SEE ALSO ^

src/io/io_passdown.c, src/io/io.c, src/io/io_layers.c, src/io/io_private.h.

HISTORY ^

Initially written by chromatic.

*/

/* * Local variables: * c-file-style: "parrot" * End: * vim: expandtab shiftwidth=4: */


 parrot