ReadOptions.c

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#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "util.h"
#include "hash.h"
#include "vpr_types.h"
#include "OptionTokens.h"
#include "ReadOptions.h"
#include "read_settings.h"
#include "globals.h"

static boolean EchoEnabled;

static boolean Generate_PostSynthesis_Netlist;

static boolean *echoFileEnabled = NULL;
static char **echoFileNames = NULL;

static char **outputFileNames = NULL;

/******** Function prototypes ********/

static char **ReadBaseToken(INP char **Args, OUTP enum e_OptionBaseToken *Token);
static void Error(INP const char *Token);
static char **ProcessOption(INP char **Args, INOUTP t_options * Options);
static void MergeOptions(INOUTP t_options * dest, INP t_options * src, int id);
static char **ReadFloat(INP char **Args, OUTP float *Val);
static char **ReadInt(INP char **Args, OUTP int *Val);
static char **ReadOnOff(INP char **Args, OUTP boolean * Val);
static char **ReadClusterSeed(INP char **Args, OUTP enum e_cluster_seed *Type);
static char **ReadFixPins(INP char **Args, OUTP char **PinFile);
static char **ReadPlaceAlgorithm(INP char **Args,
        OUTP enum e_place_algorithm *Algo);
static char **ReadRouterAlgorithm(INP char **Args,
        OUTP enum e_router_algorithm *Algo);
static char **ReadPackerAlgorithm(INP char **Args,
        OUTP enum e_packer_algorithm *Algo);
static char **ReadBaseCostType(INP char **Args,
        OUTP enum e_base_cost_type *BaseCostType);
static char **ReadRouteType(INP char **Args, OUTP enum e_route_type *Type);
static char **ReadString(INP char **Args, OUTP char **Val);

/******** Globally Accessible Function ********/
/* Determines whether timing analysis should be on or off. 
 Unless otherwise specified, always default to timing.
 */
boolean IsTimingEnabled(INP t_options *Options) {
    /* First priority to the '--timing_analysis' flag */
    if (Options->Count[OT_TIMING_ANALYSIS]) {
        return Options->TimingAnalysis;
    }
    return TRUE;
}

/* Determines whether file echo should be on or off. 
 Unless otherwise specified, always default to on.
 */
boolean IsEchoEnabled(INP t_options *Options) {
    /* First priority to the '--echo_file' flag */
    if (Options->Count[OT_CREATE_ECHO_FILE]) {
        return Options->CreateEchoFile;
    }
    return FALSE;
}


boolean getEchoEnabled(void) {
    return EchoEnabled;
}

void setEchoEnabled(boolean echo_enabled) {
    /* enable echo outputs */
    EchoEnabled = echo_enabled;
    if(echoFileEnabled == NULL) {
        /* initialize default echo options */
        alloc_and_load_echo_file_info();
    }
}

boolean GetPostSynthesisOption(void){
  return Generate_PostSynthesis_Netlist;
}

void SetPostSynthesisOption(boolean post_synthesis_enabled){
  Generate_PostSynthesis_Netlist = post_synthesis_enabled;
}

boolean IsPostSynthesisEnabled(INP t_options *Options) {
  /* First priority to the '--generate_postsynthesis_netlist' flag */
  if (Options->Count[OT_GENERATE_POST_SYNTHESIS_NETLIST]) {
    return Options->Generate_Post_Synthesis_Netlist;
  }
  return FALSE;
}


void setAllEchoFileEnabled(boolean value) {
    int i;
    for(i = 0; i < (int) E_ECHO_END_TOKEN; i++) {
        echoFileEnabled[i] = value;
    }
}

void setEchoFileEnabled(enum e_echo_files echo_option, boolean value) {
    echoFileEnabled[(int)echo_option] = value;
}

void setEchoFileName(enum e_echo_files echo_option, const char *name) {
    if(echoFileNames[(int)echo_option] != NULL) {
        free(echoFileNames[(int)echo_option]);
    }
    echoFileNames[(int)echo_option] = my_strdup(name);
}

boolean isEchoFileEnabled(enum e_echo_files echo_option) {
    if(echoFileEnabled == NULL) {
        return FALSE;
    } else {
        return echoFileEnabled[(int)echo_option];
    }
}
char *getEchoFileName(enum e_echo_files echo_option) {
    return echoFileNames[(int)echo_option];
}

void alloc_and_load_echo_file_info() {
    echoFileEnabled = (boolean*)my_calloc((int) E_ECHO_END_TOKEN, sizeof(boolean));
    echoFileNames = (char**)my_calloc((int) E_ECHO_END_TOKEN, sizeof(char*));

    setAllEchoFileEnabled(TRUE);

    setEchoFileName(E_ECHO_INITIAL_CLB_PLACEMENT, "initial_clb_placement.echo");
    setEchoFileName(E_ECHO_INITIAL_PLACEMENT_TIMING_GRAPH, "initial_placement_timing_graph.echo");
    setEchoFileName(E_ECHO_INITIAL_PLACEMENT_SLACK, "initial_placement_slack.echo");
    setEchoFileName(E_ECHO_INITIAL_PLACEMENT_CRITICALITY, "initial_placement_criticality.echo");
    setEchoFileName(E_ECHO_END_CLB_PLACEMENT, "end_clb_placement.echo");
    setEchoFileName(E_ECHO_PLACEMENT_SINK_DELAYS, "placement_sink_delays.echo");
    setEchoFileName(E_ECHO_FINAL_PLACEMENT_TIMING_GRAPH, "final_placement_timing_graph.echo");
    setEchoFileName(E_ECHO_FINAL_PLACEMENT_SLACK, "final_placement_slack.echo");
    setEchoFileName(E_ECHO_FINAL_PLACEMENT_CRITICALITY, "final_placement_criticality.echo");
    setEchoFileName(E_ECHO_PLACEMENT_CRIT_PATH, "placement_crit_path.echo");
    setEchoFileName(E_ECHO_PB_GRAPH, "pb_graph.echo");
    setEchoFileName(E_ECHO_ARCH, "arch.echo");
    setEchoFileName(E_ECHO_PLACEMENT_CRITICAL_PATH, "placement_critical_path.echo");
    setEchoFileName(E_ECHO_PLACEMENT_LOWER_BOUND_SINK_DELAYS, "placement_lower_bound_sink_delays.echo");
    setEchoFileName(E_ECHO_PLACEMENT_LOGIC_SINK_DELAYS, "placement_logic_sink_delays.echo");
    setEchoFileName(E_ECHO_ROUTING_SINK_DELAYS, "routing_sink_delays.echo");
    setEchoFileName(E_ECHO_POST_FLOW_TIMING_GRAPH, "post_flow_timing_graph.blif");
    setEchoFileName(E_ECHO_POST_PACK_NETLIST, "post_pack_netlist.blif");
    setEchoFileName(E_ECHO_BLIF_INPUT, "blif_input.echo");
    setEchoFileName(E_ECHO_NET_DELAY, "net_delay.echo");
    setEchoFileName(E_ECHO_TIMING_GRAPH, "timing_graph.echo");
    setEchoFileName(E_ECHO_LUT_REMAPPING, "lut_remapping.echo");
    setEchoFileName(E_ECHO_PRE_PACKING_TIMING_GRAPH, "pre_packing_timing_graph.echo");
    setEchoFileName(E_ECHO_PRE_PACKING_TIMING_GRAPH_AS_BLIF, "pre_packing_timing_graph_as_blif.blif");
    setEchoFileName(E_ECHO_CLUSTERING_TIMING_INFO, "clustering_timing_info.echo");
    setEchoFileName(E_ECHO_PRE_PACKING_SLACK, "pre_packing_slack.echo");
    setEchoFileName(E_ECHO_PRE_PACKING_CRITICALITY, "pre_packing_criticality.echo");
    setEchoFileName(E_ECHO_CLUSTERING_BLOCK_CRITICALITIES, "clustering_block_criticalities.echo");
    setEchoFileName(E_ECHO_PRE_PACKING_MOLECULES_AND_PATTERNS, "pre_packing_molecules_and_patterns.echo");
    setEchoFileName(E_ECHO_MEM, "mem.echo");
    setEchoFileName(E_ECHO_RR_GRAPH, "rr_graph.echo");
    setEchoFileName(E_ECHO_TIMING_CONSTRAINTS, "timing_constraints.echo");  
    setEchoFileName(E_ECHO_CRITICAL_PATH, "critical_path.echo");    
    setEchoFileName(E_ECHO_SLACK, "slack.echo");    
    setEchoFileName(E_ECHO_CRITICALITY, "criticality.echo");
    setEchoFileName(E_ECHO_COMPLETE_NET_TRACE, "complete_net_trace.echo");
    setEchoFileName(E_ECHO_SEG_DETAILS, "seg_details.txt");
}

void free_echo_file_info() {
    int i;
    if(echoFileEnabled != NULL) {
        for(i = 0; i < (int) E_ECHO_END_TOKEN; i++) {
            if(echoFileNames[i] != NULL) {
                free(echoFileNames[i]);
            }
        }
        free(echoFileNames);
        free(echoFileEnabled);
        echoFileNames = NULL;
        echoFileEnabled = NULL;
    }
}

void setOutputFileName(enum e_output_files ename, const char *name, const char *default_name) {
    if(outputFileNames == NULL) {
        alloc_and_load_output_file_names(default_name);
    }
    if(outputFileNames[(int)ename] != NULL) {
        free(outputFileNames[(int)ename]);
    }
    outputFileNames[(int)ename] = my_strdup(name);
}

char *getOutputFileName(enum e_output_files ename) {
    return outputFileNames[(int)ename];
}

void alloc_and_load_output_file_names(const char *default_name) {
    char *name;

    if(outputFileNames == NULL) {

        outputFileNames = (char**)my_calloc((int)E_FILE_END_TOKEN, sizeof(char*));

        name = (char*)my_malloc((strlen(default_name) + 40) * sizeof(char));
        sprintf(name, "%s.critical_path.out", default_name);
        setOutputFileName(E_CRIT_PATH_FILE, name, default_name);
    
        sprintf(name, "%s.slack.out", default_name);
        setOutputFileName(E_SLACK_FILE, name, default_name);

        sprintf(name, "%s.criticality.out", default_name);
        setOutputFileName(E_CRITICALITY_FILE, name, default_name);

        free(name);
    }
}

void free_output_file_names() {
    int i;
    if(outputFileNames != NULL) {
        for(i = 0; i < (int)E_FILE_END_TOKEN; i++) {
            if(outputFileNames[i] != NULL) {
                free(outputFileNames[i]);
                outputFileNames[i] = NULL;
            }
        }
        free(outputFileNames);
        outputFileNames = NULL;
    }
}



/******** Subroutine implementations ********/

void ReadOptions(INP int argc, INP char **argv, OUTP t_options * Options) {
    char **Args, **head;
    int offset;
    
    /* Clear values and pointers to zero */
    memset(Options, 0, sizeof(t_options));

    /* Alloc a new pointer list for args with a NULL at end.
     * This makes parsing the same as for archfile for consistency.
     * Skips the first arg as it is the program image path */
    --argc;
    ++argv;
    head = Args = (char **) my_malloc(sizeof(char *) * (argc + 1));
    memcpy(Args, argv, (sizeof(char *) * argc));
    Args[argc] = NULL;

    /* Go through the command line args. If they have hyphens they are 
     * options. Otherwise assume they are part of the four mandatory
     * arguments */
    while (*Args) {
        if (strncmp("--", *Args, 2) == 0) {
            *Args += 2; /* Skip the prefix */
            Args = ProcessOption(Args, Options);
        } else if (strncmp("-", *Args, 1) == 0) {
            *Args += 1; /* Skip the prefix */
            Args = ProcessOption(Args, Options);
        } else if (NULL == Options->ArchFile) {
            Options->ArchFile = my_strdup(*Args);
            vpr_printf(TIO_MESSAGE_INFO, "Architecture file: %s\n", Options->ArchFile);
            ++Args;
        } else if (NULL == Options->CircuitName) {
            Options->CircuitName = my_strdup(*Args);
            /*if the user entered the circuit name with the .blif extension, remove it now*/
            offset = strlen(Options->CircuitName) - 5;
            if (offset > 0 && !strcmp(Options->CircuitName + offset, ".blif")) {
                Options->CircuitName[offset] = '\0';
            }
            vpr_printf(TIO_MESSAGE_INFO, "Circuit name: %s.blif\n", Options->CircuitName);
            vpr_printf(TIO_MESSAGE_INFO, "\n");
            ++Args;
        } else {
            /* Not an option and arch and net already specified so fail */
            Error(*Args);
        }

        if (Options->Count[OT_SETTINGS_FILE] != Options->read_settings)
        {
            int tmp_argc = 0;
            char **tmp_argv = NULL;
            t_options SettingsFileOptions;

            tmp_argc = read_settings_file(Options->SettingsFile, &tmp_argv);

            ReadOptions(tmp_argc, tmp_argv, &SettingsFileOptions);

            MergeOptions(Options, &SettingsFileOptions, Options->Count[OT_SETTINGS_FILE]);

            Options->read_settings = Options->Count[OT_SETTINGS_FILE];

            /* clean up local data structures */
            free(tmp_argv);
        }
    }
    free(head);
}

static char **
ProcessOption(INP char **Args, INOUTP t_options * Options) {
    enum e_OptionBaseToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadBaseToken(Args, &Token);
    
    if (Token < OT_BASE_UNKNOWN) {
        /* If this was previously set by a lower priority source
         * (ie. a settings file), reset the provenance and the
         * count */
        if (Options->Provenance[Token])
        {
            Options->Provenance[Token] = 0;
            Options->Count[Token] = 1;
        }
        else
            ++Options->Count[Token];
    }

    switch (Token) {
        /* File naming options */
    case OT_BLIF_FILE:
        return ReadString(Args, &Options->BlifFile);
    case OT_NET_FILE:
        return ReadString(Args, &Options->NetFile);
    case OT_PLACE_FILE:
        return ReadString(Args, &Options->PlaceFile);
    case OT_ROUTE_FILE:
        return ReadString(Args, &Options->RouteFile);
    case OT_SDC_FILE:
        return ReadString(Args, &Options->SDCFile);
    case OT_SETTINGS_FILE:
        return ReadString(Args, &Options->SettingsFile);
        /* General Options */
    case OT_NODISP:
        return Args;
    case OT_AUTO:
        return ReadInt(Args, &Options->GraphPause);
    case OT_PACK:
    case OT_ROUTE:
    case OT_PLACE:
        return Args;
    case OT_TIMING_ANALYZE_ONLY_WITH_NET_DELAY:
        return ReadFloat(Args, &Options->constant_net_delay);
    case OT_FAST:
    case OT_FULL_STATS:
        return Args;
    case OT_TIMING_ANALYSIS:
        return ReadOnOff(Args, &Options->TimingAnalysis);
    case OT_OUTFILE_PREFIX:
        return ReadString(Args, &Options->out_file_prefix);
    case OT_CREATE_ECHO_FILE:
        return ReadOnOff(Args, &Options->CreateEchoFile);
    case OT_GENERATE_POST_SYNTHESIS_NETLIST:
          
      return ReadOnOff(Args, &Options->Generate_Post_Synthesis_Netlist);
        /* Clustering Options */
    case OT_GLOBAL_CLOCKS:
        return ReadOnOff(Args, &Options->global_clocks);
    case OT_HILL_CLIMBING_FLAG:
        return ReadOnOff(Args, &Options->hill_climbing_flag);
    case OT_SWEEP_HANGING_NETS_AND_INPUTS:
        return ReadOnOff(Args, &Options->sweep_hanging_nets_and_inputs);
    case OT_TIMING_DRIVEN_CLUSTERING:
        return ReadOnOff(Args, &Options->timing_driven);
    case OT_CLUSTER_SEED:
        return ReadClusterSeed(Args, &Options->cluster_seed_type);
    case OT_ALPHA_CLUSTERING:
        return ReadFloat(Args, &Options->alpha);
    case OT_BETA_CLUSTERING:
        return ReadFloat(Args, &Options->beta);
    case OT_RECOMPUTE_TIMING_AFTER:
        return ReadInt(Args, &Options->recompute_timing_after);
    case OT_CLUSTER_BLOCK_DELAY:
        return ReadFloat(Args, &Options->block_delay);
    case OT_ALLOW_UNRELATED_CLUSTERING:
        return ReadOnOff(Args, &Options->allow_unrelated_clustering);
    case OT_ALLOW_EARLY_EXIT:
        return ReadOnOff(Args, &Options->allow_early_exit);
    case OT_INTRA_CLUSTER_NET_DELAY:
        return ReadFloat(Args, &Options->intra_cluster_net_delay);
    case OT_INTER_CLUSTER_NET_DELAY:
        return ReadFloat(Args, &Options->inter_cluster_net_delay);
    case OT_CONNECTION_DRIVEN_CLUSTERING:
        return ReadOnOff(Args, &Options->connection_driven);
    case OT_SKIP_CLUSTERING:
        return Args;
    case OT_PACKER_ALGORITHM:
        return ReadPackerAlgorithm(Args, &Options->packer_algorithm);

        /* Placer Options */
    case OT_PLACE_ALGORITHM:
        return ReadPlaceAlgorithm(Args, &Options->PlaceAlgorithm);
    case OT_INIT_T:
        return ReadFloat(Args, &Options->PlaceInitT);
    case OT_EXIT_T:
        return ReadFloat(Args, &Options->PlaceExitT);
    case OT_ALPHA_T:
        return ReadFloat(Args, &Options->PlaceAlphaT);
    case OT_INNER_NUM:
        return ReadFloat(Args, &Options->PlaceInnerNum);
    case OT_SEED:
        return ReadInt(Args, &Options->Seed);
    case OT_PLACE_COST_EXP:
        return ReadFloat(Args, &Options->place_cost_exp);
    case OT_PLACE_CHAN_WIDTH:
        return ReadInt(Args, &Options->PlaceChanWidth);
    case OT_FIX_PINS:
        return ReadFixPins(Args, &Options->PinFile);
    case OT_ENABLE_TIMING_COMPUTATIONS:
        return ReadOnOff(Args, &Options->ShowPlaceTiming);
    case OT_BLOCK_DIST:
        return ReadInt(Args, &Options->block_dist);

        /* Placement Options Valid Only for Timing-Driven Placement */
    case OT_TIMING_TRADEOFF:
        return ReadFloat(Args, &Options->PlaceTimingTradeoff);
    case OT_RECOMPUTE_CRIT_ITER:
        return ReadInt(Args, &Options->RecomputeCritIter);
    case OT_INNER_LOOP_RECOMPUTE_DIVIDER:
        return ReadInt(Args, &Options->inner_loop_recompute_divider);
    case OT_TD_PLACE_EXP_FIRST:
        return ReadFloat(Args, &Options->place_exp_first);
    case OT_TD_PLACE_EXP_LAST:
        return ReadFloat(Args, &Options->place_exp_last);

        /* Router Options */
    case OT_MAX_ROUTER_ITERATIONS:
        return ReadInt(Args, &Options->max_router_iterations);
    case OT_BB_FACTOR:
        return ReadInt(Args, &Options->bb_factor);
    case OT_INITIAL_PRES_FAC:
        return ReadFloat(Args, &Options->initial_pres_fac);
    case OT_PRES_FAC_MULT:
        return ReadFloat(Args, &Options->pres_fac_mult);
    case OT_ACC_FAC:
        return ReadFloat(Args, &Options->acc_fac);
    case OT_FIRST_ITER_PRES_FAC:
        return ReadFloat(Args, &Options->first_iter_pres_fac);
    case OT_BEND_COST:
        return ReadFloat(Args, &Options->bend_cost);
    case OT_ROUTE_TYPE:
        return ReadRouteType(Args, &Options->RouteType);
    case OT_VERIFY_BINARY_SEARCH:
        return Args;
    case OT_ROUTE_CHAN_WIDTH:
        return ReadInt(Args, &Options->RouteChanWidth);
    case OT_ROUTER_ALGORITHM:
        return ReadRouterAlgorithm(Args, &Options->RouterAlgorithm);
    case OT_BASE_COST_TYPE:
        return ReadBaseCostType(Args, &Options->base_cost_type);

        /* Routing options valid only for timing-driven routing */
    case OT_ASTAR_FAC:
        return ReadFloat(Args, &Options->astar_fac);
    case OT_MAX_CRITICALITY:
        return ReadFloat(Args, &Options->max_criticality);
    case OT_CRITICALITY_EXP:
        return ReadFloat(Args, &Options->criticality_exp);

        /* Power options */
    case OT_POWER:
        return Args;
    case OT_ACTIVITY_FILE:
        return ReadString(Args, &Options->ActFile);
    case OT_POWER_OUT_FILE:
        return ReadString(Args, &Options->PowerFile);
    case OT_CMOS_TECH_BEHAVIOR_FILE:
        return ReadString(Args, &Options->CmosTechFile);

    default:
        vpr_printf(TIO_MESSAGE_ERROR, "Unexpected option '%s' on command line.\n", *PrevArgs);
        exit(1);
    }
}

/*
 * Map options set in the source t_options to a target t_options
 * structure.  Existing values in the destination have priority
 * and will not be overwritten
 */
static void MergeOptions(INOUTP t_options * dest, INP t_options * src, int id)
{
    int Token;

    for (Token = 0; Token < OT_BASE_UNKNOWN; Token++)
    {
        /* Don't override values already set in the
         * target destination.  Also do not process
         * Tokens that are not present in the source.
         */
        if ((dest->Count[Token] || (!src->Count[Token])))
            continue;

        dest->Count[Token] = src->Count[Token];
        dest->Provenance[Token] = id;

        switch (Token) {
            /* File naming options */
        case OT_BLIF_FILE:
            dest->BlifFile = src->BlifFile;
            break;
        case OT_NET_FILE:
            dest->NetFile = src->NetFile;
            break;
        case OT_PLACE_FILE:
            dest->PlaceFile = src->PlaceFile;
            break;
        case OT_ROUTE_FILE:
            dest->RouteFile = src->RouteFile;
            break;
        case OT_SETTINGS_FILE:
            dest->SettingsFile = src->SettingsFile;
            break;
        case OT_SDC_FILE:
            dest->SDCFile = src->SDCFile;
            break;
            /* General Options */
        case OT_NODISP:
            break;
        case OT_AUTO:
            dest->GraphPause = src->GraphPause;
            break;
        case OT_PACK:
        case OT_ROUTE:
        case OT_PLACE:
            break;
        case OT_TIMING_ANALYZE_ONLY_WITH_NET_DELAY:
            dest->constant_net_delay = src->constant_net_delay;
            break;
        case OT_FAST:
        case OT_FULL_STATS:
            break;
        case OT_TIMING_ANALYSIS:
            dest->TimingAnalysis = src->TimingAnalysis;
            break;
        case OT_OUTFILE_PREFIX:
            dest->out_file_prefix = src->out_file_prefix;
            break;
        case OT_CREATE_ECHO_FILE:
            dest->CreateEchoFile = src->CreateEchoFile;
            break;

            /* Clustering Options */
        case OT_GLOBAL_CLOCKS:
            dest->global_clocks = src->global_clocks;
            break;
        case OT_HILL_CLIMBING_FLAG:
            dest->hill_climbing_flag = src->hill_climbing_flag;
            break;
        case OT_SWEEP_HANGING_NETS_AND_INPUTS:
            dest->sweep_hanging_nets_and_inputs = src->sweep_hanging_nets_and_inputs;
            break;
        case OT_TIMING_DRIVEN_CLUSTERING:
            dest->timing_driven = src->timing_driven;
            break;
        case OT_CLUSTER_SEED:
            dest->cluster_seed_type = src->cluster_seed_type;
            break;
        case OT_ALPHA_CLUSTERING:
            dest->alpha = src->alpha;
            break;
        case OT_BETA_CLUSTERING:
            dest->beta = src->beta;
            break;
        case OT_RECOMPUTE_TIMING_AFTER:
            dest->recompute_timing_after = src->recompute_timing_after;
            break;
        case OT_CLUSTER_BLOCK_DELAY:
            dest->block_delay = src->block_delay;
            break;
        case OT_ALLOW_UNRELATED_CLUSTERING:
            dest->allow_unrelated_clustering = src->allow_unrelated_clustering;
            break;
        case OT_ALLOW_EARLY_EXIT:
            dest->allow_early_exit = src->allow_early_exit;
            break;
        case OT_INTRA_CLUSTER_NET_DELAY:
            dest->intra_cluster_net_delay = src->intra_cluster_net_delay;
            break;
        case OT_INTER_CLUSTER_NET_DELAY:
            dest->inter_cluster_net_delay = src->inter_cluster_net_delay;
            break;
        case OT_CONNECTION_DRIVEN_CLUSTERING:
            dest->connection_driven = src->connection_driven;
            break;
        case OT_SKIP_CLUSTERING:
            break;
        case OT_PACKER_ALGORITHM:
            dest->packer_algorithm = src->packer_algorithm;
            break;

            /* Placer Options */
        case OT_PLACE_ALGORITHM:
            dest->PlaceAlgorithm = src->PlaceAlgorithm;
            break;
        case OT_INIT_T:
            dest->PlaceInitT = src->PlaceInitT;
            break;
        case OT_EXIT_T:
            dest->PlaceExitT = src->PlaceExitT;
            break;
        case OT_ALPHA_T:
            dest->PlaceAlphaT = src->PlaceAlphaT;
            break;
        case OT_INNER_NUM:
            dest->PlaceInnerNum = src->PlaceInnerNum;
            break;
        case OT_SEED:
            dest->Seed = src->Seed;
            break;
        case OT_PLACE_COST_EXP:
            dest->place_cost_exp = src->place_cost_exp;
            break;
        case OT_PLACE_CHAN_WIDTH:
            dest->PlaceChanWidth = src->PlaceChanWidth;
            break;
        case OT_FIX_PINS:
            dest->PinFile = src->PinFile;
            break;
        case OT_ENABLE_TIMING_COMPUTATIONS:
            dest->ShowPlaceTiming = src->ShowPlaceTiming;
            break;
        case OT_BLOCK_DIST:
            dest->block_dist = src->block_dist;
            break;

            /* Placement Options Valid Only for Timing-Driven Placement */
        case OT_TIMING_TRADEOFF:
            dest->PlaceTimingTradeoff = src->PlaceTimingTradeoff;
            break;
        case OT_RECOMPUTE_CRIT_ITER:
            dest->RecomputeCritIter = src->RecomputeCritIter;
            break;
        case OT_INNER_LOOP_RECOMPUTE_DIVIDER:
            dest->inner_loop_recompute_divider = src->inner_loop_recompute_divider;
            break;
        case OT_TD_PLACE_EXP_FIRST:
            dest->place_exp_first = src->place_exp_first;
            break;
        case OT_TD_PLACE_EXP_LAST:
            dest->place_exp_last = src->place_exp_last;
            break;

            /* Router Options */
        case OT_MAX_ROUTER_ITERATIONS:
            dest->max_router_iterations = src->max_router_iterations;
            break;
        case OT_BB_FACTOR:
            dest->bb_factor = src->bb_factor;
            break;
        case OT_INITIAL_PRES_FAC:
            dest->initial_pres_fac = src->initial_pres_fac;
            break;
        case OT_PRES_FAC_MULT:
            dest->pres_fac_mult = src->pres_fac_mult;
            break;
        case OT_ACC_FAC:
            dest->acc_fac = src->acc_fac;
            break;
        case OT_FIRST_ITER_PRES_FAC:
            dest->first_iter_pres_fac = src->first_iter_pres_fac;
            break;
        case OT_BEND_COST:
            dest->bend_cost = src->bend_cost;
            break;
        case OT_ROUTE_TYPE:
            dest->RouteType = src->RouteType;
            break;
        case OT_VERIFY_BINARY_SEARCH:
            break;
        case OT_ROUTE_CHAN_WIDTH:
            dest->RouteChanWidth = src->RouteChanWidth;
            break;
        case OT_ROUTER_ALGORITHM:
            dest->RouterAlgorithm = src->RouterAlgorithm;
            break;
        case OT_BASE_COST_TYPE:
            dest->base_cost_type = src->base_cost_type;
            break;

            /* Routing options valid only for timing-driven routing */
        case OT_ASTAR_FAC:
            dest->astar_fac = src->astar_fac;
            break;
        case OT_MAX_CRITICALITY:
            dest->max_criticality = src->max_criticality;
            break;
        case OT_CRITICALITY_EXP:
            dest->criticality_exp = src->criticality_exp;
            break;
        default:
            break;
        }
    }
}

static char **
ReadBaseToken(INP char **Args, OUTP enum e_OptionBaseToken *Token) {
    struct s_TokenPair *Cur;

    /* Empty string is end of tokens marker */
    if (NULL == *Args)
        Error(*Args);

    /* Linear search for the pair */
    Cur = OptionBaseTokenList;
    while (Cur->Str) {
        if (strcmp(*Args, Cur->Str) == 0) {
            *Token = (enum e_OptionBaseToken) Cur->Enum;
            return ++Args;
        }
        ++Cur;
    }

    *Token = OT_BASE_UNKNOWN;
    return ++Args;
}

static char **
ReadToken(INP char **Args, OUTP enum e_OptionArgToken *Token) {
    struct s_TokenPair *Cur;

    /* Empty string is end of tokens marker */
    if (NULL == *Args)
        Error(*Args);

    /* Linear search for the pair */
    Cur = OptionArgTokenList;
    while (Cur->Str) {
        if (strcmp(*Args, Cur->Str) == 0) {
            *Token = (enum e_OptionArgToken)Cur->Enum;
            return ++Args;
        }
        ++Cur;
    }

    *Token = OT_ARG_UNKNOWN;
    return ++Args;
}

/* Called for parse errors. Spits out a message and then exits program. */
static void Error(INP const char *Token) {
    if (Token) {
        vpr_printf(TIO_MESSAGE_ERROR, "Unexpected token '%s' on command line.\n", Token);
    } else {
        vpr_printf(TIO_MESSAGE_ERROR, "Missing token at end of command line.\n");
    }
    exit(1);
}

static char **
ReadClusterSeed(INP char **Args, OUTP enum e_cluster_seed *Type) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_TIMING:
        *Type = VPACK_TIMING;
        break;
    case OT_MAX_INPUTS:
        *Type = VPACK_MAX_INPUTS;
        break;
    default:
        Error(*PrevArgs);
    }

    return Args;
}

static char **
ReadPackerAlgorithm(INP char **Args, OUTP enum e_packer_algorithm *Algo) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_GREEDY:
        *Algo = PACK_GREEDY;
        break;
    case OT_BRUTE_FORCE:
        *Algo = PACK_BRUTE_FORCE;
        break;
    default:
        Error(*PrevArgs);
    }

    return Args;
}

static char **
ReadRouterAlgorithm(INP char **Args, OUTP enum e_router_algorithm *Algo) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_BREADTH_FIRST:
        *Algo = BREADTH_FIRST;
        break;
    case OT_NO_TIMING:
        *Algo = NO_TIMING;
        break;
    case OT_TIMING_DRIVEN:
        *Algo = TIMING_DRIVEN;
        break;
    default:
        Error(*PrevArgs);
    }

    return Args;
}

static char **
ReadBaseCostType(INP char **Args, OUTP enum e_base_cost_type *BaseCostType) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_INTRINSIC_DELAY:
        *BaseCostType = INTRINSIC_DELAY;
        break;
    case OT_DELAY_NORMALIZED:
        *BaseCostType = DELAY_NORMALIZED;
        break;
    case OT_DEMAND_ONLY:
        *BaseCostType = DEMAND_ONLY;
        break;
    default:
        Error(*PrevArgs);
    }

    return Args;
}

static char **
ReadRouteType(INP char **Args, OUTP enum e_route_type *Type) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_GLOBAL:
        *Type = GLOBAL;
        break;
    case OT_DETAILED:
        *Type = DETAILED;
        break;
    default:
        Error(*PrevArgs);
    }

    return Args;
}

static char **
ReadPlaceAlgorithm(INP char **Args, OUTP enum e_place_algorithm *Algo) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_BOUNDING_BOX:
        *Algo = BOUNDING_BOX_PLACE;
        break;
    case OT_NET_TIMING_DRIVEN:
        *Algo = NET_TIMING_DRIVEN_PLACE;
        break;
    case OT_PATH_TIMING_DRIVEN:
        *Algo = PATH_TIMING_DRIVEN_PLACE;
        break;
    default:
        Error(*PrevArgs);
    }

    return Args;
}

static char **
ReadFixPins(INP char **Args, OUTP char **PinFile) {
    enum e_OptionArgToken Token;
    int Len;
    char **PrevArgs = Args;

    Args = ReadToken(Args, &Token);
    if (OT_RANDOM != Token) {
        Len = 1 + strlen(*PrevArgs);
        *PinFile = (char *) my_malloc(Len * sizeof(char));
        memcpy(*PinFile, *PrevArgs, Len);
    }
    return Args;
}

static char **
ReadOnOff(INP char **Args, OUTP boolean * Val) {
    enum e_OptionArgToken Token;
    char **PrevArgs;

    PrevArgs = Args;
    Args = ReadToken(Args, &Token);
    switch (Token) {
    case OT_ON:
        *Val = TRUE;
        break;
    case OT_OFF:
        *Val = FALSE;
        break;
    default:
        Error(*PrevArgs);
    }
    return Args;
}

static char **
ReadInt(INP char **Args, OUTP int *Val) {
    if (NULL == *Args)
        Error(*Args);
    if ((**Args > '9') || (**Args < '0'))
        Error(*Args);

    *Val = atoi(*Args);

    return ++Args;
}

static char **
ReadFloat(INP char ** Args, OUTP float *Val) {
    if (NULL == *Args) {
        Error(*Args);
    }

    if ((**Args != '-') && (**Args != '.')
            && ((**Args > '9') || (**Args < '0'))) {
        Error(*Args);
    }

    *Val = atof(*Args);

    return ++Args;
}

static char **
ReadString(INP char **Args, OUTP char **Val) {
    if (NULL == *Args) {
        Error(*Args);
    }

    *Val = my_strdup(*Args);

    return ++Args;
}