/*
 * Copyright (c) 1983-2023 Trevor Wishart and Composers Desktop Project Ltd
 * http://www.trevorwishart.co.uk
 * http://www.composersdesktop.com
 *
 This file is part of the CDP System.

 The CDP System 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.

 The CDP System 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 the CDP System; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 02111-1307 USA
 *
 */



/* floatsam version : no changes */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <structures.h>
#include <tkglobals.h>
#include <globcon.h>
#include <processno.h>
#include <modeno.h>
#include <arrays.h>
#include <filetype.h>
#include <mix.h>
#include <cdpmain.h>

#include <sfsys.h>
#include <osbind.h>


static int  check_chans(int lineno,int oldwordpos,dataptr dz);
static void insert_word(char **permm,int permlen,int *name_index,int m,int t,dataptr dz);
static void prefix_word(char **perm,int permlen,int *name_index,int m,dataptr dz);
static void shuflup_words(char **perm,int permlen,int k);
static int  output_mixfile_line(char **wordstor,int total_words,int wordcnt,int *maxwordsize,dataptr dz);

/************************* DO_TIME_AND_NAME_COPY ************************/

int do_time_and_name_copy(dataptr dz)
{
    int  exit_status;
    int  extra_words = 0;
    int  *maxwordsize;
    int total_words = 0, new_words = 0, words_above = 0, moveindex;
    int new_total_words, oldwordpos, orig_oldwordpos, newwordpos;
    int  n, lineno, wordno, newlines, oldlinecnt;

    if(dz->mode==MSH_DUPL_AND_RENAME) {        /* space for the new sndfilename must bhave been allocated */
        if(dz->extra_word<0) {
            sprintf(errstr,"extra_word not accounted for: do_time_and_name_copy()\n");
            return(PROGRAM_ERROR);
        }
        extra_words = 1;
    }

    newlines    = dz->iparam[MSH_ENDLINE] - dz->iparam[MSH_STARTLINE];
    //lines_above = dz->linecnt - dz->iparam[MSH_ENDLINE];

    for(n=0;n<dz->linecnt;n++)
        total_words += dz->wordcnt[n];

    for(n=dz->iparam[MSH_ENDLINE];n<dz->linecnt;n++)
        words_above += dz->wordcnt[n];

    for(n=dz->iparam[MSH_STARTLINE];n<dz->iparam[MSH_ENDLINE];n++)
        new_words += dz->wordcnt[n];

    new_total_words = total_words + new_words;

    if((dz->wordstor = (char **)realloc(dz->wordstor,(new_total_words+extra_words) * sizeof(char *)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for word store.\n");
        return(MEMORY_ERROR);                                                           /* alloc space for all new words */
    }
    for(n=total_words+extra_words; n < new_total_words+extra_words;n++)
        dz->wordstor[n] = NULL;

    oldlinecnt = dz->linecnt;
    dz->linecnt += newlines;

    if((dz->wordcnt = (int *)realloc(dz->wordcnt,dz->linecnt * sizeof(int)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for word count store.\n");
        return(MEMORY_ERROR);                                                           /* alloc space for all new line wordcnts */
    }
    for(n=oldlinecnt; n < dz->linecnt;n++)
        dz->wordcnt[n] = 0;

    dz->all_words  += new_words;                                                    /* update total wordcnt: good housekeeping */

    oldwordpos      = total_words + extra_words     - 1;
    newwordpos      = new_total_words + extra_words - 1;
    /* 'MOVE' WORDS BEYOND THE ACTED-ON LINES + ANY EXTRA_WORD */
    for(n=0;n<(words_above+extra_words);n++) {
        dz->wordstor[newwordpos] = dz->wordstor[oldwordpos];
        newwordpos--;
        oldwordpos--;
        if(oldwordpos<0) {
            sprintf(errstr,"Accounting problem 0: do_time_and_name_copy()\n");
            return(PROGRAM_ERROR);
        }
    }
    for(n=oldlinecnt;n<dz->linecnt;n++)                     /* Put correct wordcnt in place for these moved lines */
        dz->wordcnt[n] = dz->wordcnt[n - newlines];

    if(dz->mode==MSH_DUPL_AND_RENAME)                       /* adjust address where new sndfilename is now found */
        dz->extra_word += new_words;

    oldwordpos = 0;                                                         /* GO TO THE END OF THE WORDS TO DUPLICATE */
    for(lineno=0;lineno<dz->iparam[MSH_ENDLINE];lineno++)
        oldwordpos += dz->wordcnt[lineno];
    oldwordpos--;
    newwordpos = oldwordpos + new_words;            /* MOVING BACKWARDS, DUPLICATE THE ACTED-ON LINES */

    for(lineno = dz->iparam[MSH_ENDLINE]-1,moveindex = newlines;lineno>=dz->iparam[MSH_STARTLINE];lineno--,moveindex--) {

        orig_oldwordpos = oldwordpos;                   /* CREATE WORDS IN A DUPLICATE LINE */
        for(wordno=dz->wordcnt[lineno]-1;wordno>=0;wordno--) {
            /* CHECKING THE CHANNEL If process DEMANDS IT */
            if(wordno==MIX_CHANPOS && dz->mode==MSH_DUPL_AND_RENAME && dz->vflag[MSH_NOCHECK]==FALSE) {
                if((exit_status = check_chans(lineno,oldwordpos,dz))<0)
                    return(exit_status);
            }                                                                       /* SUBSTITUTING NEW NAME: IF process DEMANDS IT */
            if(wordno==MIX_NAMEPOS && dz->mode==MSH_DUPL_AND_RENAME)
                dz->wordstor[newwordpos] = dz->wordstor[dz->extra_word];
            else
                dz->wordstor[newwordpos] = dz->wordstor[oldwordpos];
            oldwordpos--;
            newwordpos--;
            if(lineno > 0 && wordno > 0) {
                if(oldwordpos<0) {
                    sprintf(errstr,"Accounting problem 1: do_time_and_name_copy()\n");
                    return(PROGRAM_ERROR);
                }
            }
        }
        dz->wordcnt[lineno+moveindex] = dz->wordcnt[lineno];

        oldwordpos = orig_oldwordpos;                   /* THEN ALSO MOVE WORDS OF ORIGINAL LINE */
        if(newwordpos < oldwordpos) {
            sprintf(errstr,"Accounting problem 2: do_time_and_name_copy()\n");
            return(PROGRAM_ERROR);
        }
        for(wordno=dz->wordcnt[lineno]-1;wordno>=0;wordno--) {
            dz->wordstor[newwordpos] = dz->wordstor[oldwordpos];
            oldwordpos--;
            newwordpos--;
        }
        if(moveindex-1 < 0) {
            sprintf(errstr,"Accounting problem 2a: do_time_and_name_copy()\n");
            return(PROGRAM_ERROR);
        }
        dz->wordcnt[lineno+moveindex-1] = dz->wordcnt[lineno];
    }

    if((exit_status = get_maxwordsize(&maxwordsize,dz))<0)
        return(exit_status);
    if((exit_status = output_mixfile_lines(maxwordsize,dz))<0)
        return(exit_status);
    free(maxwordsize);
    return(FINISHED);
}

/************************* OUTPUT_MIXFILE_LINES ******************************/

int output_mixfile_lines(int *maxwordsize,dataptr dz)
{
    int exit_status;
    int n;
    int total_words = 0;
    for(n=0;n<dz->linecnt;n++) {
        if((exit_status = output_mixfile_line(dz->wordstor,total_words,dz->wordcnt[n],maxwordsize,dz))<0)
            return(exit_status);
        total_words += dz->wordcnt[n];
    }
    return(FINISHED);
}

/************************* CHECK_CHANS ******************************/

int check_chans(int lineno,int oldwordpos,dataptr dz)
{
    int chans;
    if(sscanf(dz->wordstor[oldwordpos],"%d",&chans)!=1) {
        sprintf(errstr,"Failed to read channel value:line %d: check_chans()\n",lineno+1);
        return(PROGRAM_ERROR);
    }
    if(chans!=dz->otherfile->channels) {
        sprintf(errstr,"New named file has incompatible channel cnt: line %d: check_chans()\n",lineno+1);
        return(DATA_ERROR);
    }
    return(FINISHED);
}

/************************* DO_NAME_REVERSE ******************************/

int do_name_reverse(dataptr dz)
{
    int exit_status;
    int  *maxwordsize;
    int *name_index;
    int half_linecnt;
    char *temp;
    int lineno, newlineno, total_words = 0;

    if((name_index = (int *)malloc(dz->linecnt * sizeof(int)))==NULL) {
        sprintf(errstr,"do_name_reverse()\n");
        return(PROGRAM_ERROR);
    }
    if((exit_status = get_maxwordsize(&maxwordsize,dz))<0) {
        free(name_index);
        return(exit_status);
    }
    for(lineno=0;lineno<dz->linecnt;lineno++) {
        name_index[lineno] = total_words;
        total_words += dz->wordcnt[lineno];
    }

    half_linecnt  = dz->iparam[MSH_ENDLINE] - dz->iparam[MSH_STARTLINE];
    half_linecnt  = half_linecnt/2; /* TRUNCATE */
    half_linecnt += dz->iparam[MSH_STARTLINE];

    for(lineno=dz->iparam[MSH_STARTLINE],newlineno=dz->iparam[MSH_ENDLINE]-1;lineno < half_linecnt;lineno++,newlineno--) {
        temp                                                    = dz->wordstor[name_index[lineno]];
        dz->wordstor[name_index[lineno]]        = dz->wordstor[name_index[newlineno]];
        dz->wordstor[name_index[newlineno]] = temp;
    }
    if((exit_status = output_mixfile_lines(maxwordsize,dz))<0) {
        free(maxwordsize);
        free(name_index);
        return(exit_status);
    }
    free(maxwordsize);
    free(name_index);
    return(FINISHED);
}

/************************* DO_NAME_FREEZE ******************************/

int do_name_freeze(dataptr dz)
{
    int exit_status;
    int  *maxwordsize;
    int *name_index;
    int lineno, total_words = 0;

    if((name_index = (int *)malloc(dz->linecnt * sizeof(int)))==NULL) {
        sprintf(errstr,"do_name_reverse()\n");
        return(PROGRAM_ERROR);
    }
    if((exit_status = get_maxwordsize(&maxwordsize,dz))<0) {
        free(name_index);
        return(exit_status);
    }
    for(lineno=0;lineno<dz->linecnt;lineno++) {
        name_index[lineno] = total_words;
        total_words += dz->wordcnt[lineno];
    }

    for(lineno=dz->iparam[MSH_STARTLINE];lineno < dz->iparam[MSH_ENDLINE];lineno++)
        dz->wordstor[name_index[lineno]] = dz->wordstor[name_index[dz->iparam[MSH_STARTLINE]]];

    if((exit_status = output_mixfile_lines(maxwordsize,dz))<0) {
        free(name_index);
        free(maxwordsize);
        return(exit_status);
    }
    free(name_index);
    free(maxwordsize);
    return(FINISHED);
}

/************************** RANDOMISE_NAMES **************************/

int randomise_names(dataptr dz)
{
    int  exit_status;
    int  *maxwordsize;
    int *name_index;
    int lineno, total_words = 0;
    int n, m, t;
    int permlen = dz->iparam[MSH_ENDLINE] - dz->iparam[MSH_STARTLINE];
    char **permm;

    if((name_index = (int *)malloc(dz->linecnt * sizeof(int)))==NULL) {
        sprintf(errstr,"randomise_names(): 1\n");
        return(PROGRAM_ERROR);
    }
    if((permm = (char **)malloc(permlen * sizeof(char *)))==NULL) {
        free(name_index);
        sprintf(errstr,"randomise_names(): 2\n");
        return(PROGRAM_ERROR);
    }
    if((exit_status = get_maxwordsize(&maxwordsize,dz))<0) {
        free(name_index);
        free(permm);
        return(exit_status);
    }
    for(lineno=0;lineno<dz->linecnt;lineno++) {
        name_index[lineno] = total_words;
        total_words += dz->wordcnt[lineno];
    }
    for(n=0;n<permlen;n++) {
        t = (int)(drand48() * (double)(n+1));
        if(t==n)
            prefix_word(permm,permlen,name_index,n+dz->iparam[MSH_STARTLINE],dz);
        else
            insert_word(permm,permlen,name_index,n+dz->iparam[MSH_STARTLINE],t,dz);
    }
    for(n=0,m=dz->iparam[MSH_STARTLINE];n<permlen;n++,m++)
        dz->wordstor[name_index[m]] = permm[n];
    if((exit_status = output_mixfile_lines(maxwordsize,dz))<0) {
        free(name_index);
        free(permm);
        free(maxwordsize);
        return(exit_status);
    }
    free(name_index);
    free(permm);
    free(maxwordsize);
    return(FINISHED);
}

/****************************** INSERT_WORD ****************************/

void insert_word(char **permm,int permlen,int *name_index,int m,int t,dataptr dz)
{
    shuflup_words(permm,permlen,t+1);
    permm[t+1] = dz->wordstor[name_index[m]];
}

/****************************** PREFIX_WORD ****************************/

void prefix_word(char **permm,int permlen,int *name_index,int m,dataptr dz)
{
    shuflup_words(permm,permlen,0);
    permm[0] = dz->wordstor[name_index[m]];
}

/****************************** SHUFLUP_WORDS ****************************/

void shuflup_words(char **permm,int permlen,int k)
{
    int n;
    char **i;
    int z = permlen - 1;
    i = &(permm[z]);
    for(n = z; n > k; n--) {
        *i = *(i-1);
        i--;
    }
}

/************************** OUTPUT_MIXFILE_LINE ***************************/

int output_mixfile_line(char **wordstor,int total_words,int wordcnt,int *maxwordsize,dataptr dz)
{
    int n, m, spacecnt;
    int wordno;
    for(n = 0;n<wordcnt;n++) {
        wordno = total_words + n;
        if((spacecnt = maxwordsize[n] - strlen(wordstor[wordno]))<0) {
            sprintf(errstr,"Word alignment error: output_mixfile_line()\n");
            return(PROGRAM_ERROR);
        }
        spacecnt++;
        fprintf(dz->fp,"%s",wordstor[wordno]);
        for(m=0;m<spacecnt;m++)
            fprintf(dz->fp," ");
    }
    fprintf(dz->fp,"\n");
    return(FINISHED);
}