variant_fd.c

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#include <sys/resource.h>
 
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
 
#include <amxc_variant_priv.h>
 
static int variant_fd_to_string(amxc_var_t* const dest,
                                const amxc_var_t* const src) {
    int retval = -1;
    int check = 0;
    int size_needed = snprintf(NULL, 0, "%" PRId32, src->data.fd);
    dest->data.s = (char*) calloc(size_needed + 1, sizeof(char));
 
    when_null(dest->data.s, exit);
 
    check = snprintf(dest->data.s, size_needed + 1, "%" PRId32, src->data.fd);
    if(check < 0) {
        free(dest->data.s);
        dest->data.s = NULL;
        goto exit;
    }
 
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_int8(amxc_var_t* const dest,
                              const amxc_var_t* const src) {
    int retval = -1;
 
    /* verify overflow or underflow */
    when_true(src->data.fd > INT8_MAX || src->data.fd < INT8_MIN, exit);
 
    dest->data.i8 = (int8_t) src->data.fd;
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_int16(amxc_var_t* const dest,
                               const amxc_var_t* const src) {
    int retval = -1;
 
    /* verify overflow or underflow */
    when_true(src->data.fd > INT16_MAX || src->data.fd < INT16_MIN, exit);
 
    dest->data.i16 = (int16_t) src->data.fd;
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_int32(amxc_var_t* const dest,
                               const amxc_var_t* const src) {
    int retval = -1;
 
    /* verify overflow or underflow */
    when_true(src->data.fd > INT32_MAX || src->data.fd < INT32_MIN, exit);
 
    dest->data.i32 = (int32_t) src->data.fd;
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_int64(amxc_var_t* const dest,
                               const amxc_var_t* const src) {
    int retval = -1;
 
    dest->data.i64 = (int64_t) src->data.fd;
    retval = 0;
 
    return retval;
}
 
static int variant_fd_to_uint8(amxc_var_t* const dest,
                               const amxc_var_t* const src) {
    int retval = -1;
 
    /* verify overflow or underflow */
    when_true(src->data.fd == INT32_MIN || llabs(src->data.fd) > UINT8_MAX, exit);
 
    dest->data.ui8 = (uint8_t) llabs(src->data.fd);
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_uint16(amxc_var_t* const dest,
                                const amxc_var_t* const src) {
    int retval = -1;
 
    /* verify overflow or underflow */
    when_true(src->data.fd == INT32_MIN || llabs(src->data.fd) > UINT16_MAX, exit);
 
    dest->data.ui16 = (uint16_t) llabs(src->data.fd);
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_uint32(amxc_var_t* const dest,
                                const amxc_var_t* const src) {
    int retval = -1;
 
    /* verify overflow or underflow */
    when_true(src->data.fd == INT32_MIN || llabs(src->data.fd) > UINT32_MAX, exit);
 
    dest->data.ui32 = (uint32_t) llabs(src->data.fd);
    retval = 0;
 
exit:
    return retval;
}
 
static int variant_fd_to_uint64(amxc_var_t* const dest,
                                const amxc_var_t* const src) {
    dest->data.ui64 = llabs(src->data.fd);
    return 0;
}
 
 
static int variant_fd_to_float(amxc_var_t* const dest,
                               const amxc_var_t* const src) {
    dest->data.f = (float) src->data.fd;
    return 0;
}
 
static int variant_fd_to_double(amxc_var_t* const dest,
                                const amxc_var_t* const src) {
    dest->data.d = (double) src->data.fd;
    return 0;
}
 
static int variant_fd_to_bool(amxc_var_t* const dest,
                              const amxc_var_t* const src) {
 
    dest->data.b = fcntl((int) llabs(src->data.fd), F_GETFD) != 0 ? false : true;
    return 0;
}
 
static int variant_fd_convert_to(amxc_var_t* const dest,
                                 const amxc_var_t* const src) {
    int retval = -1;
 
    amxc_var_convert_fn_t convfn[AMXC_VAR_ID_CUSTOM_BASE] = {
        amxc_var_default_convert_to_null,
        variant_fd_to_string,
        variant_fd_to_int8,
        variant_fd_to_int16,
        variant_fd_to_int32,
        variant_fd_to_int64,
        variant_fd_to_uint8,
        variant_fd_to_uint16,
        variant_fd_to_uint32,
        variant_fd_to_uint64,
        variant_fd_to_float,
        variant_fd_to_double,
        variant_fd_to_bool,
        amxc_var_default_convert_to_list,
        amxc_var_default_convert_to_htable,
        amxc_var_default_copy,
        NULL,
        variant_fd_to_string,
        variant_fd_to_string,
        amxc_var_default_copy
    };
 
    if(dest->type_id >= AMXC_VAR_ID_CUSTOM_BASE) {
        goto exit;
    }
 
    if(convfn[dest->type_id] != NULL) {
        if(dest->type_id == AMXC_VAR_ID_ANY) {
            amxc_var_set_type(dest, AMXC_VAR_ID_INT64);
        }
        retval = convfn[dest->type_id](dest, src);
    }
 
exit:
    return retval;
}
 
static int variant_fd_compare(const amxc_var_t* const lval,
                              const amxc_var_t* const rval,
                              int* const result) {
    if(lval->data.fd == rval->data.fd) {
        *result = 0;
    } else if(lval->data.fd > rval->data.fd) {
        *result = 1;
    } else {
        *result = -1;
    }
    return 0;
}
 
static amxc_var_type_t amxc_variant_fd = {
    .init = NULL,
    .del = NULL,
    .copy = amxc_var_default_copy,
    .move = amxc_var_default_move,
    .convert_from = NULL,
    .convert_to = variant_fd_convert_to,
    .compare = variant_fd_compare,
    .get_key = NULL,
    .set_key = NULL,
    .get_index = NULL,
    .set_index = NULL,
    .type_id = 0,
    .hit = { .ait = NULL, .key = NULL, .next = NULL },
    .name = AMXC_VAR_NAME_FD
};
 
CONSTRUCTOR static void amxc_var_fd_init(void) {
    amxc_var_add_type(&amxc_variant_fd, AMXC_VAR_ID_FD);
}
 
DESTRUCTOR static void amxc_var_fd_cleanup(void) {
    amxc_var_remove_type(&amxc_variant_fd);
}
 
int amxc_var_set_fd_t(amxc_var_t* var, int val) {
    int retval = -1;
    struct rlimit nofile = { 0, 0 };
    when_null(var, exit);
 
    when_failed(getrlimit(RLIMIT_NOFILE, &nofile), exit);
 
    when_true(val < 0 || (rlim_t) llabs(val) > nofile.rlim_max, exit);
    when_failed(amxc_var_set_type(var, AMXC_VAR_ID_FD), exit);
 
    var->data.fd = (int) llabs(val);
 
    retval = 0;
 
exit:
    return retval;
}
 
fd_t amxc_var_get_fd_t(const amxc_var_t* var) {
    int64_t retval = 0;
    amxc_var_t variant;
    when_null(var, exit);
 
    amxc_var_init(&variant);
    when_failed(amxc_var_convert(&variant, var, AMXC_VAR_ID_FD), exit);
    retval = variant.data.fd;
    amxc_var_clean(&variant);
 
exit:
    return retval;
}
 
fd_t amxc_var_get_const_fd_t(const amxc_var_t* const var) {
    fd_t retval = -1;
    when_null(var, exit);
    when_true(var->type_id != AMXC_VAR_ID_FD, exit);
 
    retval = var->data.fd;
 
exit:
    return retval;
}
 
amxc_var_t* amxc_var_add_new_fd_t(amxc_var_t* const var, int val) {
    amxc_var_t* subvar = NULL;
 
    when_null(var, exit);
    subvar = amxc_var_add_new(var);
    when_null(subvar, exit);
 
    if(amxc_var_set_fd_t(subvar, val) != 0) {
        amxc_var_delete(&subvar);
    }
 
exit:
    return subvar;
}
 
amxc_var_t* amxc_var_add_new_key_fd_t(amxc_var_t* const var, const char* key, int val) {
    amxc_var_t* subvar = NULL;
 
    when_null(var, exit);
    subvar = amxc_var_add_new_key(var, key);
    when_null(subvar, exit);
 
    if(amxc_var_set_fd_t(subvar, val) != 0) {
        amxc_var_delete(&subvar);
    }
 
exit:
    return subvar;
}