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- /*
- * The functions in this file handle redisplay. The
- * redisplay system knows almost nothing about the editing
- * process; the editing functions do, however, set some
- * hints to eliminate a lot of the grinding. There is more
- * that can be done; the "vtputc" interface is a real
- * pig. The MEMMAP
- * changes things around for memory mapped video. With
- * both off, the terminal is a VT52.
- */
-
- #include <sys/types.h>
- #include <sys/stat.h>
- #include "def.h"
-
- D64 get_double ();
- D32 get_long ();
- D16 get_int ();
- void writ_echo ();
- void modeline ();
- void bin_to_text ();
- uint fill_buf ();
- uint get_currow ();
- uint get_curcol ();
- #ifndef NOPROTO
- struct vid;
- void ucopy (struct vid *vvp, struct vid *pvp);
- void uline (int row, struct vid *vvp, struct vid *pvp);
- #else
- void uline ();
- void ucopy ();
- #endif
- #if MSDOS
- void mem_line (int row, struct vid *vvp);
- #endif
-
- extern char MSG_prn_to[];
- extern char MSG_disp_r_n[];
- extern char MSG_11lX[];
- extern char MSG_11lo[];
- extern char MSG_11ld[];
- extern char MSG_116e[];
- extern char MSG_03o[];
- extern char MSG_06o[];
- extern char MSG_011lo[];
- extern char MSG_03u[];
- extern char MSG_05u[];
- extern char MSG_010lu[];
- extern char MSG_02X[];
- extern char MSG_04X[];
- extern char MSG_08lX[];
- extern char MSG_prog_name[];
- extern char MSG_disp_b_lst[];
- extern char MSG_file[];
- extern char MSG_RO[];
- extern char MSG_WL[];
- extern char MSG_RW[];
- extern char MSG_AU[];
- extern char MSG_NOT_AU[];
- extern char MSG_curs_asc[];
- extern char MSG_curs_ebc[];
- extern char MSG_curs_hex[];
- extern char MSG_curs_bin[];
- extern char MSG_curs_dec[];
- extern char MSG_curs_flt[];
- extern char MSG_curs_oct[];
- extern char MSG_siz_8[];
- extern char MSG_siz_16[];
- extern char MSG_siz_32[];
- extern char MSG_siz_null[];
- extern char MSG_int_shift[];
- extern char MSG_mot_shift[];
- extern char MSG_print1[];
- extern char MSG_print2[];
- extern char MSG_cnt_al_w[];
- #if RUNCHK
- extern char ERR_disp_1[];
- extern char ERR_disp_2[];
- extern char ERR_disp_3[];
- extern char ERR_disp_4[];
- extern char ERR_disp_5[];
- extern char ERR_disp_6[];
- #endif
-
- extern char ebcdic_table[];
-
- extern bool mem_map;
-
- /*
- * You can change these back to the types
- * implied by the name if you get tight for space. If you
- * make both of them "int" you get better code on the VAX.
- * They do nothing if this is not Gosling redisplay, except
- * for change the size of a structure that isn't used.
- * A bit of a cheat.
- */
- #define XCHAR int
- #define XSHORT int
-
- /*
- * A video structure always holds
- * an array of characters whose length is equal to
- * the longest line possible. Only some of this is
- * used if "ncol" isn't the same as "NCOL".
- */
- typedef struct vid
- {
- short v_hash; /* Hash code, for compares. */
- short v_flag; /* Flag word. */
- short v_color; /* Color of the line. */
- char v_text[NCOL]; /* The actual characters. */
- } VIDEO;
-
- #define VFCHG 0x0001 /* Changed. */
- #define VFHBAD 0x0002 /* Hash and cost are bad. */
-
- /*
- * SCORE structures hold the optimal
- * trace trajectory, and the cost of redisplay, when
- * the dynamic programming redisplay code is used.
- * If no fancy redisplay, this isn't used. The trace index
- * fields can be "char", and the score a "short", but
- * this makes the code worse on the VAX.
- */
- typedef struct
- {
- XCHAR s_itrace; /* "i" index for track back. */
- XCHAR s_jtrace; /* "j" index for trace back. */
- XSHORT s_cost; /* Display cost. */
- } SCORE;
-
- int sgarbf = TRUE; /* TRUE if screen is garbage. */
- int vtrow = 0; /* Virtual cursor row. */
- int vtcol = 0; /* Virtual cursor column. */
- int tthue = CNONE; /* Current color. */
- int ttrow = HUGE; /* Physical cursor row. */
- int ttcol = HUGE; /* Physical cursor column. */
- int tttop = HUGE; /* Top of scroll region. */
- int ttbot = HUGE; /* Bottom of scroll region. */
- char file_off_bad = FALSE; /* Have file offsets been changed */
-
- VIDEO **vscreen; /* Edge vector, virtual. */
- VIDEO **pscreen; /* Edge vector, physical. */
- VIDEO *video; /* Actual screen data. */
- VIDEO blanks; /* Blank line image. */
-
- /*
- * Initialize the data structures used
- * by the display code. The edge vectors used
- * to access the screens are set up. The operating
- * system's terminal I/O channel is set up. Fill the
- * "blanks" array with ASCII blanks. The rest is done
- * at compile time. The original window is marked
- * as needing full update, and the physical screen
- * is marked as garbage, so all the right stuff happens
- * on the first call to redisplay.
- */
- void
- vtinit ()
- {
- register VIDEO *vp;
- register int i;
-
- /* allocate memory for screen images */
- if (((vscreen = (VIDEO **) malloc (sizeof (VIDEO *) * nrow)) == NULL) ||
- ((pscreen = (VIDEO **) malloc (sizeof (VIDEO *) * nrow)) == NULL) ||
- ((video = (VIDEO *) malloc (sizeof (VIDEO) * 2 * nrow)) == NULL))
- {
- err_echo (MSG_cnt_al_w);
- exit (1); /* can't continue */
- }
-
- vp = &video[0];
- for (i = 0; i < nrow; ++i)
- {
- vscreen[i] = vp;
- ++vp;
- pscreen[i] = vp;
- ++vp;
- }
- blanks.v_color = CTEXT;
- for (i = 0; i < NCOL; ++i)
- blanks.v_text[i] = ' ';
- }
-
- /*
- * Free memory used by the screen buffers
- */
- void
- vtfree ()
- {
- /* release old screen memory */
- free (video);
- free (pscreen);
- free (vscreen);
- }
-
- /*
- * Tidy up the virtual display system
- * in anticipation of a return back to the host
- * operating system. Right now all we do is position
- * the cursor to the last line, erase the line, and
- * close the terminal channel.
- */
- void
- vttidy ()
- {
- ttcolor (CTEXT);
- ttnowindow (); /* No scroll window. */
- ttmove (nrow - 1, 0); /* Echo line. */
- tteeol ();
- tttidy ();
- ttflush ();
- ttclose ();
- }
-
- /*
- * Move the virtual cursor to an origin
- * 0 spot on the virtual display screen. I could
- * store the column as a character pointer to the spot
- * on the line, which would make "vtputc" a little bit
- * more efficient. No checking for errors.
- */
- void
- vtmove (row, col)
- int row, col;
- {
- vtrow = row;
- vtcol = col;
- }
-
- /*
- * Write a character to the virtual display,
- * dealing with long lines and the display of unprintable
- * things like control characters. Also expand tabs every 8
- * columns. This code only puts printing characters into
- * the virtual display image. Special care must be taken when
- * expanding tabs. On a screen whose width is not a multiple
- * of 8, it is possible for the virtual cursor to hit the
- * right margin before the next tab stop is reached. This
- * makes the tab code loop if you are not careful.
- * Three guesses how we found this.
- */
- void
- vtputc (c)
- register char c;
- {
- register VIDEO *vp;
-
- vp = vscreen[vtrow];
- if (vtcol >= ncol)
- vp->v_text[ncol - 1] = '$';
- else if (ISCTRL (c) != FALSE)
- {
- vtputc ('^');
- vtputc ((char) (c + 0x40));
- }
- else
- {
- vp->v_text[vtcol] = c;
- vtcol++;
- }
- }
-
- /*
- * Write an entire screen line in the correct format. pvr
- *
- * This code only puts printing characters into
- * the virtual display image.
- * Return TRUE if something was printed to the line.
- */
- #define REGI register
- bool
- vtputd (wp, row)
- WINDOW *wp;
- int row; /* line # to print to v screen */
-
- {
- REGI VIDEO *vp;
- REGI uchar mode;
- REGI A32 row_offst;
- REGI uint chrs_per_row, lin_offset, i, chrs_in_lin;
- LINE *cur_line;
- static char w_buf[128]; /* temp buffer for data */
-
- vp = vscreen[vtrow]; /* point to VIDEO structure to print into */
- mode = R_TYPE (wp); /* get type of format structure */
-
- /* get number of bytes per row */
- chrs_per_row = R_BYTES (wp);
-
- /* determine the offset from begining of the buffer for this line */
- row_offst = WIND_POS (wp) + (row * chrs_per_row);
-
- /* search for and point to first character in buffer to be printed */
- cur_line = wp->w_linep; /* start with current first window line */
- while (TRUE)
- { /* find line with desired character */
- if (cur_line == wp->w_bufp->b_linep)
- { /* at end of buffer? */
- return (FALSE);
- }
- if (cur_line->l_file_offset > row_offst)
- {
- /* if less than current line */
- cur_line = cur_line->l_bp; /* step back */
- }
- else if ((cur_line->l_file_offset + cur_line->l_used) <= row_offst)
- {
- cur_line = cur_line->l_fp; /* step ahead */
- }
- else
- break;
- }
- lin_offset = row_offst - cur_line->l_file_offset; /* offset into line */
-
- /* get index into the current line to start reading the current row's data */
- /* copy line text into buffer */
- chrs_in_lin = fill_buf (wp, cur_line, lin_offset, w_buf, chrs_per_row);
-
- /* limit line length to screen width, used in TEXT mode only */
- if (chrs_in_lin > NCOL)
- chrs_in_lin = NCOL;
-
- /* Clear the line to spaces */
- for (i = 0; i < NCOL; i++)
- {
- vp->v_text[i] = ' ';
- }
- switch (mode)
- {
- case TEXT:
- break;
- case ASCII:
- case EBCDIC:
- case BINARY:
- case HEX:
- /* print the row offset from the start of the file in HEX */
- sprintf (vp->v_text, MSG_11lX, row_offst); /* to vid buf */
- break;
- case OCTAL:
- /* print the row offset from the start of the file */
- sprintf (vp->v_text, MSG_11lo, row_offst); /* to vid buf */
- break;
- #if FLOAT_DISP
- case FLOAT:
- #endif
- case DECIMAL:
- /* print the row offset from the start of the file */
- sprintf (vp->v_text, MSG_11ld, row_offst); /* to vid buf */
- break;
- #if RUNCHK
- default:
- writ_echo (ERR_disp_1);
- break;
- #endif
- }
-
- /* print the binary data to the text line */
- bin_to_text (w_buf, vp->v_text, chrs_in_lin, wp->w_fmt_ptr);
-
- vtcol = NCOL;
- return (TRUE);
- }
-
- /*
- * Print the contents of then binary data buffer bin_buf
- * into the proper mode of text into txt_buf.
- * Process 'len' bytes.
- *
- * input:
- * bin_buf pointer to buffer of binary data to process.
- * txt_buf pointer to output buffer to print text result into.
- * len length in bytes of data in bin_buf to process.
- * fmt_ptr pointer to a ROW_FMT to use to format the data
- * conversion and printing process.
- * output:
- * none.
- */
-
- void
- bin_to_text (bin_buf, txt_buf, len, fmt_ptr)
-
- char *bin_buf, *txt_buf;
- uint len;
- ROW_FMT *fmt_ptr;
-
- {
- uchar i, ch, k, j, mode, size, *posn;
- uint temp_int;
- ulong temp_long;
-
- mode = fmt_ptr->r_type; /* get type of format structure */
- size = fmt_ptr->r_size; /* get size of format structure */
- posn = fmt_ptr->r_positions;/* pointer to array of display positions */
-
- switch (mode)
- {
- case TEXT:
- case ASCII:
- for (i = 0; i < len; i++)
- {
- ch = bin_buf[i];
- if ((ch >= ' ') && (ch < 0x7f))
- txt_buf[posn[0] + i] = ch;
- else
- txt_buf[posn[0] + i] = '.';
- }
- break;
-
- case EBCDIC:
- for (i = 0; i < len; i++)
- {
- txt_buf[posn[0] + i] =
- 0xff & ebcdic_table[0xff & bin_buf[i]];
- }
- break;
-
- case OCTAL:
- switch (size)
- {
- case BYTES: /* print octal bytes */
- for (i = 0; i < len; i++)
- {
- sprintf (&txt_buf[
- posn[i]], MSG_03o, 0xff & bin_buf[i]);
- }
- break;
-
- case WORDS: /* print octal words */
- k = 0;
- for (i = 0; i < len;
- i += 2)
- {
- temp_int = get_int (&bin_buf[i]);
- sprintf (&txt_buf[posn[k++]], MSG_06o, temp_int);
- }
- break;
-
- case DWORDS: /* print octal double words */
- k = 0;
- for (i = 0; i < len;
- i += 4)
- {
- temp_long = get_long (&bin_buf[i]);
- sprintf (&txt_buf[posn[k++]], MSG_011lo, temp_long);
- }
- break;
- }
- break;
-
- case DECIMAL:
- switch (size)
- {
- case BYTES: /* print decimal bytes */
- for (i = 0; i < len; i++)
- {
- sprintf (&txt_buf[posn[i]], MSG_03u, 0xff & bin_buf[i]);
- }
- break;
-
- case WORDS: /* print decimal words */
- k = 0;
- for (i = 0; i < len;
- i += 2)
- {
- temp_int = get_int (&bin_buf[i]);
- sprintf (&txt_buf[posn[k++]], MSG_05u, temp_int);
- }
- break;
-
- case DWORDS: /* print decimal double words */
- k = 0;
- for (i = 0; i < len; i += 4)
- {
- temp_long = get_long (&bin_buf[i]);
- sprintf (&txt_buf[posn[k++]], MSG_010lu, temp_long);
- }
- break;
- }
- break;
- #if FLOAT_DISP
- case FLOAT:
- {
- /*
- * The Intel floating point representation is;
- * bit 0 - 52 significand (53 bits)
- * bit 53 - 62 biased exponent (11 bits)
- * bit 63 sign
- * maximum range; 10^-308 <= X <= 10^+308
- * obviously, not all patterns are legal floating point numbers.
- * There can be up to 16 decimal digits of significand.
- * There are only 3 decimal digits of exponent (308 max).
- */
- k = 0;
- for (i = 0; i < len; i += sizeof (D64))
- {
- D64 temp_d;
-
- temp_d = get_double (&bin_buf[i]);
- sprintf (&txt_buf[posn[k++]], MSG_116e, temp_d);
- }
- }
- break;
- #endif
- case HEX:
- switch (size)
- {
- case BYTES: /* print hex bytes and ascii chars */
- for (i = 0; i < len; i++)
- {
- if ((bin_buf[i] >= ' ') && (bin_buf[i] < 0x7f))
- txt_buf[posn[i + 16]] = 0xff & bin_buf[i];
- else
- txt_buf[posn[i + 16]] = '.';
- sprintf (&txt_buf[posn[i]], MSG_02X, 0xff & bin_buf[i]);
- }
- break;
-
- case WORDS: /* print hex words */
- k = 0;
- for (i = 0; i < len; i += 2)
- {
- temp_int = get_int (&bin_buf[i]);
- sprintf (&txt_buf[
- posn[k++]], MSG_04X, temp_int);
- }
- break;
-
- case DWORDS: /* print hex double words */
- k = 0;
- for (i = 0; i < len; i += 4)
- {
- temp_long = get_long (&bin_buf[i]);
- sprintf (&txt_buf[
- posn[k++]], MSG_08lX, temp_long);
- }
- break;
- }
- break;
-
- case BINARY:
- switch (size)
- {
- case BYTES: /* print binary bits */
- for (i = 0; i < len; i++)
- {
- ch = bin_buf[i];/* get char to convert */
- for (k = 0; k < 8; k++)
- {
- if (ch & 0x80)
- txt_buf[posn[i] + k] = '1';
- else
- txt_buf[posn[i] + k] = '0';
- ch = ch << 1; /* slide next bit into place */
- }
- }
- break;
-
- case WORDS:
- j = 0;
- for (i = 0; i < len; i += 2)
- {
- temp_int = get_int (&bin_buf[i]);
-
- for (k = 0; k < 16; k++)
- {
- if (temp_int & 0x8000)
- txt_buf[posn[j] + k] = '1';
- else
- txt_buf[posn[j] + k] = '0';
- temp_int = temp_int << 1;
- /* slide next bit into place */
- }
- j++;
- }
- break;
-
- case DWORDS:
- j = 0;
- for (i = 0; i < len; i += 4)
- {
- temp_long = get_long (&bin_buf[i]);
- for (k = 0; k < 32; k++)
- {
- if (temp_long & 0x80000000)
- txt_buf[posn[j] + k] = '1';
- else
- txt_buf[posn[j] + k] = '0';
- temp_long = temp_long << 1;
- /* slide next bit into place */
- }
- j++;
- }
- break;
- }
- break;
- #if RUNCHK
- default:
- writ_echo (ERR_disp_2);
- break;
- #endif
- }
- len *= (fmt_ptr->r_chr_per_u + 1);
- /* Clean up any garbage characters left by the sprintf's */
- for (i = 0; i < NCOL; i++)
- {
- if (txt_buf[i] == 0)
- txt_buf[i] = ' ';
- }
- }
-
- /*
- * Get an int from the buffer.
- * Perform the Intel byte shuffle if necessary
- */
-
- D16
- get_int (w_buf)
- uchar *w_buf;
-
- {
- int temp_int;
-
- if (curwp->w_intel_mode)
- {
- temp_int = 0xff & w_buf[1];
- temp_int = temp_int << 8;
- temp_int |= 0xff & w_buf[0];
- }
- else
- {
- temp_int = 0xff & w_buf[0];
- temp_int = temp_int << 8;
- temp_int |= 0xff & w_buf[1];
- }
- return (temp_int);
- }
-
- /*
- * Get an long from the buffer.
- * Perform the Intel byte shuffle if necessary
- */
-
- D32
- get_long (w_buf)
- uchar *w_buf;
-
- {
- long temp_long;
-
- if (curwp->w_intel_mode)
- {
- temp_long = 0xff & w_buf[3];
- temp_long = temp_long << 8;
- temp_long |= 0xff & w_buf[2];
- temp_long = temp_long << 8;
- temp_long |= 0xff & w_buf[1];
- temp_long = temp_long << 8;
- temp_long |= 0xff & w_buf[0];
- }
- else
- {
- temp_long = 0xff & w_buf[0];
- temp_long = temp_long << 8;
- temp_long |= 0xff & w_buf[1];
- temp_long = temp_long << 8;
- temp_long |= 0xff & w_buf[2];
- temp_long = temp_long << 8;
- temp_long |= 0xff & w_buf[3];
- }
- return (temp_long);
- }
-
- #if FLOAT_DISP
- /*
- * Get an double from the buffer.
- * Perform the Intel byte shuffle if necessary
- */
-
- D64
- get_double (w_buf)
- uchar *w_buf;
- {
- uchar temp_doub[sizeof (D64)];
- D64 *dp;
- int i, siz;
-
- dp = (D64 *) temp_doub;
- siz = sizeof (D64);
-
- if (curwp->w_intel_mode)
- {
- for (i = 0; i <= siz - 1; i++)
- {
- temp_doub[i] = 0xff & w_buf[i];
- }
- }
- else
- {
- for (i = 0; i <= 7; i++)
- {
- temp_doub[(siz - 1) - i] = 0xff & w_buf[i];
- }
- }
- return (*dp);
- }
-
- #endif
-
- /*
- * Copy a length of bytes from the buffer LINEs into the designated
- * buffer. If the current LINE does not have enough bytes then
- * advance to the next. Return the actual number of bytes copied.
- * The number copied would be less than the number requested if
- * end of file is reached.
- */
-
- uint
- fill_buf (wp, lin, lin_off, w_buff, cnt)
- WINDOW *wp;
- LINE *lin;
- uint lin_off, cnt;
- char *w_buff;
- {
- REGI uint src, dest, i;
-
- src = lin_off; /* initialize source line index */
- dest = 0; /* initialize destination buffer index */
-
- while (TRUE)
- {
- while (src < lin->l_used)
- {
- w_buff[dest++] = lin->l_text[src++]; /* copy byte */
- if (dest == cnt)
- { /* if done */
- return (cnt); /* then leave */
- }
- }
- if (R_TYPE (wp) == TEXT)
- return (dest); /* in text mode don't advance to next line */
-
- lin = lin->l_fp; /* move to the next line */
- if (lin == wp->w_bufp->b_linep)
- { /* if past last line */
- for (i = dest; i < cnt; ++i)
- w_buff[i] = 0; /* fill rest of buffer with zeros */
- return (dest); /* return number of chars copied */
- }
- src = 0; /* start next LINE at first byte */
- }
- }
-
- /*
- * Erase from the end of the
- * software cursor to the end of the
- * line on which the software cursor is
- * located. The display routines will decide
- * if a hardware erase to end of line command
- * should be used to display this.
- */
- void
- vteeol ()
- {
- register VIDEO *vp;
-
- vp = vscreen[vtrow];
- while (vtcol < ncol)
- vp->v_text[vtcol++] = ' ';
- }
-
- /*
- * Make sure that the display is
- * right. This is a three part process. First,
- * scan through all of the windows looking for dirty
- * ones. Check the framing, and refresh the screen.
- * Second, make the
- * virtual and physical screens the same.
- */
- void
- update ()
- {
- register WINDOW *wp;
- register VIDEO *vp1;
- register VIDEO *vp2;
- register uint i;
- register int hflag;
-
- hflag = FALSE; /* Not hard. */
- wp = wheadp;
- while (wp != NULL)
- {
- /* is this window to be displayed in linked mode */
- if ((curbp->b_flag & BFLINK) &&
- (wp->w_bufp == curbp))
- { /* move dot to current window's dot position */
- wp->w_dotp = curwp->w_dotp;
- wp->w_doto = curwp->w_doto;
- move_ptr (wp, 0L, TRUE, TRUE, TRUE); /* insure dot is aligned */
- wind_on_dot (wp); /* move window to new dot position */
- }
-
- if (wp->w_flag != 0)
- { /* Need update. */
- move_ptr (wp, 0L, FALSE, TRUE, TRUE); /* window on row boundary */
- move_ptr (wp, 0L, TRUE, TRUE, TRUE); /* dot on unit boundary */
- if ((wp->w_flag & WFFORCE) == 0)
- {
- wind_on_dot (wp); /* position window on dot */
- }
- i = get_currow (wp);/* Redo this one line, mabey. */
- if ((wp->w_flag & ~WFMODE) == WFEDIT)
- {
- vscreen[i]->v_color = CTEXT;
- vscreen[i]->v_flag |= (VFCHG | VFHBAD);
- vtmove (i, 0);
- vtputd (wp, i - wp->w_toprow); /* print line to the screen */
- }
- else if ((wp->w_flag & ~WFMODE) == WFMOVE)
- {
- while (i < wp->w_toprow + wp->w_ntrows)
- {
- /* paint entire window */
- vscreen[i]->v_color = CTEXT;
- vscreen[i]->v_flag |= (VFCHG | VFHBAD);
- vtmove (i, 0);
- /* print line to the screen */
- if (!vtputd (wp, i - wp->w_toprow))
- vteeol ();
- ++i;
- }
- }
- else if ((wp->w_flag & (WFEDIT | WFHARD)) != 0)
- {
- hflag = TRUE;
- i = wp->w_toprow;
- while (i < wp->w_toprow + wp->w_ntrows)
- {
- /* paint entire window */
- vscreen[i]->v_color = CTEXT;
- vscreen[i]->v_flag |= (VFCHG | VFHBAD);
- vtmove (i, 0);
- /* print line to the screen */
- if (!vtputd (wp, i - wp->w_toprow))
- vteeol ();
- ++i;
- }
- }
- if ((wp->w_flag & WFMODE) ||
- (wp->w_flag & WFMOVE) ||
- (wp->w_flag & WFHARD))
- modeline (wp);
- wp->w_flag = 0;
- }
- wp = wp->w_wndp;
- }
- if (sgarbf != FALSE)
- { /* Screen is garbage. */
- sgarbf = FALSE; /* Erase-page clears */
- epresf = FALSE; /* the message area. */
- tttop = HUGE; /* Forget where you set */
- ttbot = HUGE; /* scroll region. */
- tthue = CNONE; /* Color unknown. */
- ttmove (0, 0);
- tteeop ();
- #if MSDOS
- if (mem_map)
- {
- for (i = 0; i < nrow; ++i)
- {
- mem_line (i, vscreen[i]);
- }
- }
- else
- {
- #endif
- for (i = 0; i < nrow; ++i)
- {
- uline (i, vscreen[i], &blanks);
- ucopy (vscreen[i], pscreen[i]);
- }
- #if MSDOS
- }
- #endif
- ttmove (get_currow (curwp), get_curcol (curwp));
- ttflush ();
- return;
- }
- for (i = 0; i < nrow; ++i)
- { /* Easy update. */
- vp1 = vscreen[i];
- vp2 = pscreen[i];
- if ((vp1->v_flag & VFCHG) != 0)
- {
- #if MSDOS
- if (mem_map)
- mem_line (i, vp1);
- else
- #endif
- {
- uline (i, vp1, vp2);
- ucopy (vp1, vp2);
- }
- }
- }
- ttmove (get_currow (curwp), get_curcol (curwp));
- ttflush ();
- }
-
- /*
- * Get the window relative row in which the cursor will
- * appear. pvr
- */
- uint
- get_currow (wp)
- WINDOW *wp;
- {
- A32 row;
- /* number of bytes from start of window */
- row = DOT_POS (wp) - WIND_POS (wp);
- /* number of rows down in window */
- row /= R_BYTES (wp);
- row += wp->w_toprow;
- #if RUNCHK
- if (row < wp->w_toprow)
- printf (ERR_disp_3);
- if (row > (wp->w_ntrows + wp->w_toprow))
- printf (ERR_disp_4);
- #endif
- return (row & 0xffff);
- }
-
- /*
- * Get the window relative column in which the cursor will
- * appear. pvr
- */
- uint
- get_curcol (wp)
- WINDOW *wp;
- {
- long offset, index;
- uint b_per_u, pos;
-
- b_per_u = R_B_PER_U (wp);
- /* dot offset from start of buffer */
- offset = DOT_POS (wp);
- offset -= wp->w_disp_shift;
- offset &= ~(b_per_u - 1);
- /* calculate mod of the current file position */
- index = offset & (R_BYTES (wp) - 1);
- index /= b_per_u;
- /* limit to window width */
- if (index >= NCOL)
- index = NCOL;
- pos = wp->w_fmt_ptr->r_positions[index] + wp->w_unit_offset;
- return (pos);
- }
-
- #if MSDOS
- void
- mem_line (row, vvp)
- int row;
- VIDEO *vvp;
- {
- vvp->v_flag &= ~VFCHG; /* Changes done. */
- ttcolor (vvp->v_color);
- putline (row + 1, 1, ncol, &vvp->v_text[0]);
- }
-
- #endif
- /*
- * Update a saved copy of a line,
- * kept in a VIDEO structure. The "vvp" is
- * the one in the "vscreen". The "pvp" is the one
- * in the "pscreen". This is called to make the
- * virtual and physical screens the same when
- * display has done an update.
- */
- void
- ucopy (vvp, pvp)
- register VIDEO *vvp;
- register VIDEO *pvp;
- {
- register int i;
-
- vvp->v_flag &= ~VFCHG; /* Changes done. */
- pvp->v_flag = vvp->v_flag; /* Update model. */
- pvp->v_hash = vvp->v_hash;
- pvp->v_color = vvp->v_color;
- for (i = 0; i < ncol; ++i)
- pvp->v_text[i] = vvp->v_text[i];
- }
-
- /*
- * Update a single line. This routine only
- * uses basic functionality (no insert and delete character,
- * but erase to end of line). The "vvp" points at the VIDEO
- * structure for the line on the virtual screen, and the "pvp"
- * is the same for the physical screen. Avoid erase to end of
- * line when updating CMODE color lines, because of the way that
- * reverse video works on most terminals.
- */
- void
- uline (row, vvp, pvp)
- int row;
- VIDEO *vvp;
- VIDEO *pvp;
- {
- register char *cp1;
- register char *cp2;
- register char *cp3;
- register char *cp4;
- register char *cp5;
- register int nbflag;
-
- if (vvp->v_color != pvp->v_color)
- { /* Wrong color, do a */
- ttmove (row, 0); /* full redraw. */
- ttcolor (vvp->v_color);
- cp1 = &vvp->v_text[0];
- cp2 = &vvp->v_text[ncol];
- while (cp1 != cp2)
- {
- ttputc (*cp1++);
- ++ttcol;
- }
- return;
- }
- cp1 = &vvp->v_text[0]; /* Compute left match. */
- cp2 = &pvp->v_text[0];
- while (cp1 != &vvp->v_text[ncol] && cp1[0] == cp2[0])
- {
- ++cp1;
- ++cp2;
- }
- if (cp1 == &vvp->v_text[ncol]) /* All equal. */
- return;
- nbflag = FALSE;
- cp3 = &vvp->v_text[ncol]; /* Compute right match. */
- cp4 = &pvp->v_text[ncol];
- while (cp3[-1] == cp4[-1])
- {
- --cp3;
- --cp4;
- if (cp3[0] != ' ') /* Note non-blanks in */
- nbflag = TRUE; /* the right match. */
- }
- cp5 = cp3; /* Is erase good? */
- if (nbflag == FALSE && vvp->v_color == CTEXT)
- {
- while (cp5 != cp1 && cp5[-1] == ' ')
- --cp5;
- /* Alcyon hack */
- if ((int) (cp3 - cp5) <= tceeol)
- cp5 = cp3;
- }
- /* Alcyon hack */
- ttmove (row, (int) (cp1 - &vvp->v_text[0]));
- ttcolor (vvp->v_color);
- while (cp1 != cp5)
- {
- ttputc (*cp1++);
- ++ttcol;
- }
- if (cp5 != cp3) /* Do erase. */
- tteeol ();
- }
-
- /*
- * Redisplay the mode line for
- * the window pointed to by the "wp".
- * This is the only routine that has any idea
- * of how the modeline is formatted. You can
- * change the modeline format by hacking at
- * this routine. Called by "update" any time
- * there is a dirty window.
- */
-
- void
- modeline (wp)
- register WINDOW *wp;
- {
- register char *cp, size, *s;
- uchar mode;
- register char c;
- register int n, u_posn;
- register BUFFER *bp;
- register A32 posn;
-
- static char posn_buf[30] =
- {
- 0
- }; /* krw */
-
- mode = wp->w_fmt_ptr->r_type; /* get type of format structure */
- size = wp->w_fmt_ptr->r_size; /* get size of format structure */
-
- n = wp->w_toprow + wp->w_ntrows; /* Location. */
- vscreen[n]->v_color = CMODE;/* Mode line color. */
- vscreen[n]->v_flag |= (VFCHG | VFHBAD); /* Recompute, display. */
- vtmove (n, 0); /* Seek to right line. */
- bp = wp->w_bufp;
-
- cp = MSG_prog_name; /* Program name. pvr */
- n = 5;
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
-
- if ((bp->b_flag & BFBAD) != 0) /* "?" if trashed. */
- vtputc ('?');
- else
- vtputc (' ');
-
- if ((bp->b_flag & BFCHG) != 0) /* "*" if changed. */
- vtputc ('*');
- else
- vtputc (' ');
-
- if (insert_mode) /* "I" if insert mode */
- vtputc ('I');
- else
- vtputc ('O');
-
- if (bp == blistp)
- { /* special list */
- cp = MSG_disp_b_lst;
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
- goto pad;
- }
-
- /* Buffer name */
- vtputc (' ');
- ++n;
- cp = &bp->b_bname[0];
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
- while ((int) (cp - &bp->b_bname[0]) < NBUFN)
- {
- vtputc (' ');
- n++;
- cp++;
- }
-
- /* File name. */
- vtputc (' ');
- ++n;
- cp = MSG_file;
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
- cp = &bp->b_fname[0];
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
- cp--;
- while ((int) (cp - &bp->b_fname[0]) < NFILE)
- {
- vtputc (' ');
- n++;
- cp++;
- }
-
- if (bp->b_flag & BFVIEW)
- s = MSG_RO;
- else if (bp->b_flag & BFSLOCK)
- s = MSG_WL;
- else
- s = MSG_RW;
-
- while (*s)
- { /* krw */
- vtputc (*s++);
- ++n;
- }
-
- if (auto_update && !(bp->b_flag & BFVIEW) && bp->b_bname[0]) /* jam */
- s = MSG_AU;
- else
- s = MSG_NOT_AU;
- for (; *s && n < NCOL;)
- {
- vtputc (*s++);
- ++n;
- }
-
- /* Insert current dot position into mode line. */
- posn = DOT_POS (wp);
- u_posn = R_CHR_PER_U (wp) - wp->w_unit_offset - 1;
- if (u_posn < 0)
- u_posn = 0;
- switch (mode)
- {
- case TEXT:
- case ASCII:
- sprintf (posn_buf, MSG_curs_asc, posn);
- break;
- case EBCDIC:
- sprintf (posn_buf, MSG_curs_ebc, posn);
- break;
- case HEX:
- sprintf (posn_buf, MSG_curs_hex, posn, u_posn);
- break;
- case BINARY:
- sprintf (posn_buf, MSG_curs_bin, posn, u_posn);
- break;
- case DECIMAL:
- sprintf (posn_buf, MSG_curs_dec, posn, u_posn);
- break;
- #if FLOAT_DISP
- case FLOAT:
- #endif
- sprintf (posn_buf, MSG_curs_flt, posn, u_posn);
- break;
- case OCTAL:
- sprintf (posn_buf, MSG_curs_oct, posn, u_posn);
- break;
- #if RUNCHK
- default:
- writ_echo (ERR_disp_5);
- break;
- #endif
- }
-
- cp = posn_buf;
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
-
-
- if ((mode == HEX) ||
- (mode == DECIMAL) ||
- (mode == OCTAL))
- {
- switch (size)
- {
- case BYTES:
- sprintf (posn_buf, MSG_siz_8);
- break;
- case WORDS:
- sprintf (posn_buf, MSG_siz_16);
- break;
- case DWORDS:
- sprintf (posn_buf, MSG_siz_32);
- break;
- #if RUNCHK
- default:
- writ_echo (ERR_disp_6);
- break;
- #endif
- }
- }
- else
- sprintf (posn_buf, MSG_siz_null);
-
- cp = posn_buf;
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
-
- if (wp->w_intel_mode)
- sprintf (posn_buf, MSG_int_shift, wp->w_disp_shift);
- else
- sprintf (posn_buf, MSG_mot_shift, wp->w_disp_shift);
- cp = posn_buf;
- while ((c = *cp++) != 0)
- {
- vtputc (c);
- ++n;
- }
-
-
- /* pad out */
- pad:
- while (n < ncol)
- {
- vtputc (' ');
- ++n;
- }
- }
-
- /*
- * write text to the echo line
- */
- void
- writ_echo (buf)
- char *buf;
- {
- int i;
- char *vpp;
- bool fill_spac;
-
- fill_spac = FALSE;
- vpp = vscreen[nrow - 1]->v_text;
- vscreen[nrow - 1]->v_color = CTEXT;
- vscreen[nrow - 1]->v_flag |= VFCHG;
- epresf = TRUE;
-
- for (i = 0; i < NCOL; i++)
- {
- if (buf[i] == 0)
- fill_spac = TRUE;
- if (fill_spac)
- vpp[i] = ' ';
- else
- vpp[i] = buf[i];
- }
- #if MSDOS
- if (mem_map)
- {
- mem_line (nrow - 1, vscreen[nrow - 1]);
- }
- else
- #endif
- {
- uline (nrow - 1, vscreen[nrow - 1], pscreen[nrow - 1]);
- uline (nrow - 1, vscreen[nrow - 1], &blanks);
- ucopy (vscreen[nrow - 1], pscreen[nrow - 1]);
- ttflush ();
- }
- }
-
- /*
- * Print the current buffer from mark to dot using the
- * current window's display format.
- * Prompt for file name or io device to print to.
- */
-
- bool
- print ()
- {
- LINE *dot_l_sav, *mark_l_sav, *wind_l_sav;
- int dot_off_sav, mark_off_sav, wind_off_sav, i;
- char s;
- char fname[NFILEN];
- register int nline;
- char buf[NFILEN], buf1[NFILEN];
-
- /* save the original window state */
- dot_l_sav = curwp->w_dotp;
- dot_off_sav = curwp->w_doto;
- mark_l_sav = curwp->w_markp;
- mark_off_sav = curwp->w_marko;
- wind_l_sav = curwp->w_linep;
- wind_off_sav = curwp->w_loff;
-
- /* if mark is not set then set it to location zero */
- if (curwp->w_markp == NULL)
- {
- curwp->w_markp = curwp->w_bufp->b_linep->l_fp;
- curwp->w_marko = 0;
- }
-
- nline = 0;
- if ((s = ereply (MSG_prn_to, fname, NFILEN, NULL)) == ABORT)
- return (s);
- adjustcase (fname);
- if ((s = ffwopen (fname, S_IREAD | S_IWRITE)) != FIOSUC) /* Open writes message. */
- return (FALSE);
-
- sprintf (buf, MSG_print1, fname);
- writ_echo (buf);
- /* make dot before mark */
- if (DOT_POS (curwp) > MARK_POS (curwp))
- swapmark (); /* make mark first */
-
- while (DOT_POS (curwp) <= MARK_POS (curwp))
- {
- /* check if we should quit */
- if (ttkeyready ())
- {
- if (ttgetc () == CTL_G) /* quit if abort was hit */
- break;
- }
- nline++;
- /* move window so that first line is on dot */
- move_ptr (curwp, DOT_POS (curwp), FALSE, TRUE, FALSE);
-
- if (vtputd (curwp, 0)) /* print line into video buffer */
- {
- for (i = NCOL; (vscreen[vtrow]->v_text[i] < '!') ||
- (vscreen[vtrow]->v_text[i] > '~'); i--)
- ;
- i++;
- if ((s = ffputline (vscreen[vtrow]->v_text, i)) != FIOSUC)
- break;
- if ((s = ffputline (MSG_disp_r_n, 2)) != FIOSUC)
- break;
- }
- else
- break;
- forwline (0, 1, KRANDOM); /* advance to next line */
- }
- ffclose ();
- sprintf (buf1, MSG_print2, R_POS_FMT (curwp));
- sprintf (buf, buf1, (long) nline);
- writ_echo (buf);
-
- /* restore the original window state */
- curwp->w_dotp = dot_l_sav;
- curwp->w_doto = dot_off_sav;
- curwp->w_markp = mark_l_sav;
- curwp->w_marko = mark_off_sav;
- curwp->w_linep = wind_l_sav;
- curwp->w_loff = wind_off_sav;
- curwp->w_flag |= WFHARD; /* insure that window is still presentable */
- return (TRUE);
- }
-