read.c

/* File read.c */

#include "wand_head.h"
#include "display.h"
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>

extern int inform_me();

extern int edit_mode;
extern char *edit_screen;
extern char screen[NOOFROWS][ROWLEN + 1];
extern char *screenpath;

extern char screen_name[61];

char buffer[80];

/****************************************************************************
*                                   rscreen                                 *
*****************************************************************************/
int rscreen(int num, int *maxmoves)
{
    int y, numr;
    FILE *fp;
    char name[100];
    char (*row_ptr)[ROWLEN + 1] = screen;
    if (!edit_mode)
        sprintf(name, "%s/screen.%d", screenpath, num);
    else
    {
        if (!edit_screen)
            sprintf(name, "./screen");
        else
            sprintf(name, "%s", edit_screen);
    }

    if ((fp = fopen(name, "r")) == NULL)
    {
        if (edit_mode)
            sprintf(buffer, "Cannot find file %s.", name);
        else
            sprintf(buffer, "File for screen %d unavailable.", num);
        inform_me(buffer, 0);
    }
    else
    {
        for (y = 0; y < NOOFROWS; y++)
        {
            if (fgets(*row_ptr, ROWLEN + 2, fp) == NULL)
            {
                fprintf(stderr, "fgets error\n");
                exit(EXIT_FAILURE);
            }
            numr = strlen(*row_ptr) - 1;
            while (numr < ROWLEN)
                (*row_ptr)[numr++] = ' ';
            row_ptr++;
        };
        if (fgets(screen_name, 60, fp) == NULL)
        {
            fprintf(stderr, "fgets error\n");
            exit(EXIT_FAILURE);
        }
        screen_name[61] = '\0';
        screen_name[strlen(screen_name) - 1] = '\0';
        if (fscanf(fp, "%d", maxmoves) != 1)
            *maxmoves = 0;
        fclose(fp);
    };
    return (fp == NULL);
}

/*********************************************************************
*                              wscreen                               *
**********************************************************************/
int wscreen(int maxmoves)
{
    int y, x;
    FILE *fp;
    char name[100];
    char (*row_ptr)[ROWLEN + 1] = screen;

    if (!edit_screen)
        sprintf(name, "./screen");
    else
        sprintf(name, "%s", edit_screen);

    if ((fp = fopen(name, "w")) == NULL)
    {
        sprintf(name, "/tmp/screen.%d", getpid());
        if ((fp = fopen(name, "w")) != NULL)
        {
            sprintf(buffer, "Written file is %s", name);
            inform_me(buffer, 0);
        }
        else
            err(1, "Could not open %s.\n", buffer);
    }
    if (fp == NULL)
    {
        inform_me("File for screen cannot be written.", 0);
    }
    else
    {
        for (y = 0; y < NOOFROWS; y++)
        {
            for (x = 0; x < ROWLEN; x++)
                fputc(row_ptr[y][x], fp);
            fputc('\n', fp);
        };
        if (*screen_name == '\0')
            fputc('#', fp);
        else
            fputs(screen_name, fp);
        fputc('\n', fp);
        if (maxmoves != 0)
            fprintf(fp, "%d\n", maxmoves);
        fclose(fp);
    };
    return (fp == NULL);
}