/*
 * Copyright (C) 2013 Red Hat, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Authors: Peter Schiffer <pschiffe@redhat.com>
 */

#include "dmidecode.h"


/*
 * Initialize DmiProcessor attributes.
 * @param cpu
 */
void init_dmiprocessor_struct(DmiProcessor *cpu)
{
    cpu->id = NULL;
    cpu->family = NULL;
    cpu->status = NULL;
    cpu->current_speed = 0;
    cpu->max_speed = 0;
    cpu->external_clock = 0;
    cpu->name = NULL;
    cpu->enabled_cores = 1;
    cpu->type = NULL;
    cpu->stepping = NULL;
    cpu->upgrade = NULL;
    cpu->charact_nb = 0;
    cpu->characteristics = NULL;
}

/*
 * Check attributes of cpu structure and fill in defaults if needed.
 * @param cpu
 * @return 0 if success, negative value otherwise
 */
short check_dmiprocessor_attributes(DmiProcessor *cpu)
{
    short ret = -1;

    if (!cpu->id) {
        if (!(cpu->id = strdup(""))) {
            ret = -2;
            goto done;
        }
    }
    if (!cpu->family) {
        if (!(cpu->family = strdup("Unknown"))) {
            ret = -3;
            goto done;
        }
    }
    if (!cpu->status) {
        if (!(cpu->status = strdup("Unknown"))) {
            ret = -4;
            goto done;
        }
    }
    if (!cpu->name) {
        if (!(cpu->name = strdup(""))) {
            ret = -5;
            goto done;
        }
    }
    if (!cpu->type) {
        if (!(cpu->type = strdup(""))) {
            ret = -6;
            goto done;
        }
    }
    if (!cpu->stepping) {
        if (!(cpu->stepping = strdup(""))) {
            ret = -7;
            goto done;
        }
    }
    if (!cpu->upgrade) {
        if (!(cpu->upgrade = strdup("Unknown"))) {
            ret = -8;
            goto done;
        }
    }

    ret = 0;

done:
    if (ret != 0) {
        warn("Failed to allocate memory.");
    }

    return ret;
}

short dmi_get_processors(DmiProcessor **cpus, unsigned *cpus_nb)
{
    short ret = -1;
    int curr_cpu = -1;
    unsigned i, buffer_size = 0;
    char **buffer = NULL, *buf;

    *cpus_nb = 0;

    /* get dmidecode output */
    if (run_command("dmidecode -t 4", &buffer, &buffer_size) != 0) {
        ret = -2;
        goto done;
    }

    /* count processors */
    for (i = 0; i < buffer_size; i++) {
        if (strncmp(buffer[i], "Handle 0x", 9) == 0) {
            (*cpus_nb)++;
        }
    }

    /* if no processor was found */
    if (*cpus_nb < 1) {
        warn("Dmidecode didn't recognize any processor.");
        ret = -3;
        goto done;
    }

    /* allocate memory for processors */
    *cpus = (DmiProcessor *)calloc(*cpus_nb, sizeof(DmiProcessor));
    if (!(*cpus)) {
        warn("Failed to allocate memory.");
        ret = -4;
        goto done;
    }

    /* parse information about processors */
    for (i = 0; i < buffer_size; i++) {
        if (strncmp(buffer[i], "Handle 0x", 9) == 0) {
            curr_cpu++;
            init_dmiprocessor_struct(cpus[curr_cpu]);
            continue;
        }
        /* ignore first useless lines */
        if (curr_cpu < 0) {
            continue;
        }
        /* ID */
        buf = copy_string_part_after_delim(buffer[i], "ID: ");
        if (buf) {
            cpus[curr_cpu]->id = buf;
            buf = NULL;
            continue;
        }
        /* Family */
        buf = copy_string_part_after_delim(buffer[i], "Family: ");
        if (buf) {
            cpus[curr_cpu]->family = buf;
            buf = NULL;
            continue;
        }
        /* Status */
        buf = copy_string_part_after_delim(buffer[i], "Status: Populated, ");
        if (buf) {
            cpus[curr_cpu]->status = buf;
            buf = NULL;
            continue;
        }
        /* Current Speed */
        buf = copy_string_part_after_delim(buffer[i], "Current Speed: ");
        if (buf && strcmp(buf, "Unknown") != 0) {
            sscanf(buf, "%u", &cpus[curr_cpu]->current_speed);
            free(buf);
            buf = NULL;
            continue;
        }
        /* Max Speed */
        buf = copy_string_part_after_delim(buffer[i], "Max Speed: ");
        if (buf && strcmp(buf, "Unknown") != 0) {
            sscanf(buf, "%u", &cpus[curr_cpu]->max_speed);
            free(buf);
            buf = NULL;
            continue;
        }
        /* External Clock Speed */
        buf = copy_string_part_after_delim(buffer[i], "External Clock: ");
        if (buf && strcmp(buf, "Unknown") != 0) {
            sscanf(buf, "%u", &cpus[curr_cpu]->external_clock);
            free(buf);
            buf = NULL;
            continue;
        }
        /* CPU Name */
        buf = copy_string_part_after_delim(buffer[i], "Version: ");
        if (buf) {
            cpus[curr_cpu]->name = buf;
            buf = NULL;
            continue;
        }
        /* Enabled Cores */
        buf = copy_string_part_after_delim(buffer[i], "Core Enabled: ");
        if (buf) {
            sscanf(buf, "%u", &cpus[curr_cpu]->enabled_cores);
            free(buf);
            buf = NULL;
            continue;
        }
        /* CPU Type/Role */
        buf = copy_string_part_after_delim(buffer[i], "Type: ");
        if (buf) {
            cpus[curr_cpu]->type = buf;
            buf = NULL;
            continue;
        }
        /* Stepping */
        buf = copy_string_part_after_delim(buffer[i], ", Stepping ");
        if (buf) {
            cpus[curr_cpu]->stepping = buf;
            buf = NULL;
            continue;
        }
        /* Upgrade */
        buf = copy_string_part_after_delim(buffer[i], "Upgrade: ");
        if (buf) {
            cpus[curr_cpu]->upgrade = buf;
            buf = NULL;
            continue;
        }
        /* CPU Characteristics */
        if (strstr(buffer[i], "Characteristics:")
                && !strstr(buffer[i], "Characteristics: ")) {
            /* count characteristics */
            cpus[curr_cpu]->charact_nb = 0;
            while (strlen(buffer[i + cpus[curr_cpu]->charact_nb + 1])) {
                cpus[curr_cpu]->charact_nb += 1;
            }
            /* allocate memory */
            cpus[curr_cpu]->characteristics =
                    (char **)calloc(cpus[curr_cpu]->charact_nb, sizeof(char *));
            if (!cpus[curr_cpu]->characteristics) {
                warn("Failed to allocate memory.");
                ret = -5;
                goto done;
            }
            unsigned j;
            char *tmp_line;
            for (j = 0; j < cpus[curr_cpu]->charact_nb; j++) {
                tmp_line = trim(buffer[i + j + 1], NULL);
                if (tmp_line) {
                    cpus[curr_cpu]->characteristics[j] = tmp_line;
                } else {
                    cpus[curr_cpu]->characteristics[j] = strdup("");
                    if (!cpus[curr_cpu]->characteristics[j]) {
                        warn("Failed to allocate memory.");
                        ret = -6;
                        goto done;
                    }
                }
            }
            /* skip characteristics and newline after them */
            i += cpus[curr_cpu]->charact_nb + 1;
        }
    }

    /* fill in default attributes if needed */
    for (i = 0; i < *cpus_nb; i++) {
        if (check_dmiprocessor_attributes(cpus[i]) != 0) {
            ret = -7;
            goto done;
        }
    }

    ret = 0;

done:
    free_2d_buffer(&buffer, &buffer_size);

    if (ret != 0) {
        dmi_free_processors(cpus, cpus_nb);
    }

    return ret;
}

void dmi_free_processors(DmiProcessor **cpus, unsigned *cpus_nb)
{
    unsigned i, j;

    if (*cpus_nb > 0) {
        for (i = 0; i < *cpus_nb; i++) {
            if (cpus[i]->id) {
                free(cpus[i]->id);
            }
            cpus[i]->id = NULL;
            if (cpus[i]->family) {
                free(cpus[i]->family);
            }
            cpus[i]->family = NULL;
            if (cpus[i]->status) {
                free(cpus[i]->status);
            }
            cpus[i]->status = NULL;
            if (cpus[i]->name) {
                free(cpus[i]->name);
            }
            cpus[i]->name = NULL;
            if (cpus[i]->type) {
                free(cpus[i]->type);
            }
            cpus[i]->type = NULL;
            if (cpus[i]->stepping) {
                free(cpus[i]->stepping);
            }
            cpus[i]->stepping = NULL;
            if (cpus[i]->upgrade) {
                free(cpus[i]->upgrade);
            }
            cpus[i]->upgrade = NULL;
            if (cpus[i]->charact_nb > 0) {
                for (j = 0; j < cpus[i]->charact_nb; j++) {
                    if (cpus[i]->characteristics[j]) {
                        free(cpus[i]->characteristics[j]);
                    }
                    cpus[i]->characteristics[j] = NULL;
                }
                free(cpus[i]->characteristics);
            }
            cpus[i]->charact_nb = 0;
            cpus[i]->characteristics = NULL;
        }
        free (*cpus);
    }

    *cpus_nb = 0;
    *cpus = NULL;
}