mirror of https://github.com/GnoConsortium/gno.git
441 lines
7.7 KiB
C
441 lines
7.7 KiB
C
/*
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* High level routines dealing with the output to the screen.
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*/
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#pragma noroot
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#include "less.h"
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#include <unistd.h>
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#include <fcntl.h>
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#ifdef _ORCAC_
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#define FAST
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segment "LoadSegONE";
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#endif
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public int errmsgs; /* Count of messages displayed by error() */
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public int need_clr;
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extern int sigs;
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extern int sc_width;
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extern int so_s_width, so_e_width;
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extern int screen_trashed;
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extern int any_display;
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#if __MSDOS__
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extern int output_mode;
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#endif
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static int iprintnum(int num, int radix);
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static int iprintf(char *fmt, PARG *parg);
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/*
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* Display the line which is in the line buffer.
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*/
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public void
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put_line(void)
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{
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register int c;
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register int i;
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int a;
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int curr_attr;
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if (sigs)
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{
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/*
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* Don't output if a signal is pending.
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*/
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screen_trashed = 1;
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return;
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}
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curr_attr = NORMAL;
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for (i = 0; (c = gline(i, &a)) != '\0'; i++)
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{
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if (a != curr_attr)
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{
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/*
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* Changing attributes.
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* Display the exit sequence for the old attribute
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* and the enter sequence for the new one.
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*/
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switch (curr_attr)
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{
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case UNDERLINE: ul_exit(); break;
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case BOLD: bo_exit(); break;
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case BLINK: bl_exit(); break;
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}
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switch (a)
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{
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case UNDERLINE: ul_enter(); break;
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case BOLD: bo_enter(); break;
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case BLINK: bl_enter(); break;
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}
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curr_attr = a;
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}
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if (curr_attr == INVIS)
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continue;
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if (c == '\b')
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putbs();
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else
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putchr(c);
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}
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}
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/*static char obuf[1024];*/
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static char obuf[1024];
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static char *ob = obuf;
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/*
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* Flush buffered output.
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*
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* If we haven't displayed any file data yet,
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* output messages on error output (file descriptor 2),
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* otherwise output on standard output (file descriptor 1).
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*
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* This has the desirable effect of producing all
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* error messages on error output if standard output
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* is directed to a file. It also does the same if
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* we never produce any real output; for example, if
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* the input file(s) cannot be opened. If we do
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* eventually produce output, code in edit() makes
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* sure these messages can be seen before they are
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* overwritten or scrolled away.
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*/
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public void
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flush(void)
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{
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register int n;
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register int fd;
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#if __MSDOS__
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if (output_mode == 0)
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{
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*ob = '\0';
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cputs(obuf);
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ob = obuf;
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return;
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}
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#endif
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n = ob - obuf;
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if (n == 0)
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return;
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/* fd = (any_display) ? 1 : 2;*/
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fd = (any_display) ? STDOUT_FILENO : STDERR_FILENO;
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if (write(fd, obuf, n) != n)
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screen_trashed = 1;
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ob = obuf;
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}
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/*
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* Output a character.
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*/
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#ifdef FAST
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public void putchr(c)
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int c;
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{
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static char *sz=obuf+sizeof(obuf);
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char *oo;
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asm {
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lda ob+2
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sta oo+2
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lda ob
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sta oo
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cmp sz
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bcc nofl
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jsl flush
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lda ob
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sta oo
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nofl: lda need_clr
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beq noncl
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stz need_clr
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jsl lower_left
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jsl clear_eol
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noncl: lda c
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cmp #10
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bne notnl
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lda #13
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notnl: pha
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lda [oo]
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and #0xff00
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ora 1,s
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sta [oo]
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pla
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inc ob
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}
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}
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#else
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public void putchr(c)
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int c;
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{
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if (ob >= &obuf[sizeof(obuf)])
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flush();
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if (need_clr)
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{
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need_clr = 0;
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lower_left();
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clear_eol();
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}
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#if __MSDOS__
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if (c == '\n')
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*ob++ = '\r';
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#endif
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#ifdef __ORCAC__
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if (c == '\n')
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*ob++ = '\r';
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else
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#endif
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*ob++ = c;
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}
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#endif
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/*
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* Output a string.
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*/
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#ifdef FAST
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public void putstr(s)
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register char *s;
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{
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static char *sz=obuf+sizeof(obuf);
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char *oo;
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int ytmp;
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asm {
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stz ytmp
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lda ob+2
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sta oo+2
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lda ob
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sta oo
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lp: ldy ytmp
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lda [s],y
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and #0xff
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beq done
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pha
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/* jsl putchr*/
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lda oo
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cmp sz
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bcc nofl
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jsl flush
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lda ob
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sta oo
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nofl: lda need_clr
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beq noncl
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stz need_clr
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jsl lower_left
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jsl clear_eol
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noncl: lda 1,s
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cmp #10
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bne notnl
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lda #13
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notnl: pha
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lda [oo]
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and #0xff00
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ora 1,s
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sta [oo]
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pla
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pla
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inc ob
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inc oo
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inc ytmp
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bra lp
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done:
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}
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}
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#else
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public void putstr(s)
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register char *s;
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{
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while (*s != '\0')
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putchr(*s++);
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}
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#endif
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/*
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* Output an integer in a given radix.
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*/
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static int
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iprintnum(num, radix)
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int num;
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int radix;
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{
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register char *s;
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int r;
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int neg;
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char buf[10];
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if (neg = (num < 0))
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num = -num;
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s = buf;
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do
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{
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*s++ = (num % radix) + '0';
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} while ((num /= radix) != 0);
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if (neg)
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*s++ = '-';
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r = s - buf;
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while (s > buf)
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putchr(*--s);
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return (r);
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}
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/*
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* This function implements printf-like functionality
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* using a more portable argument list mechanism than printf's.
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*/
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static int
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iprintf(fmt, parg)
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register char *fmt;
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PARG *parg;
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{
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register char *s;
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register int n;
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register int col;
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col = 0;
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while (*fmt != '\0')
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{
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if (*fmt != '%')
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{
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putchr(*fmt++);
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col++;
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} else
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{
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++fmt;
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switch (*fmt++) {
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case 's':
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s = parg->p_string;
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parg++;
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while (*s != '\0')
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{
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putchr(*s++);
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col++;
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}
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break;
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case 'd':
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n = parg->p_int;
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parg++;
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col += iprintnum(n, 10);
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break;
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}
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}
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}
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return (col);
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}
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/*
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* Output a message in the lower left corner of the screen
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* and wait for carriage return.
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*/
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public void
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error(fmt, parg)
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char *fmt;
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PARG *parg;
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{
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int c;
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int col = 0;
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static char return_to_continue[] = " (press RETURN)";
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errmsgs++;
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if (any_display)
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{
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lower_left();
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clear_eol();
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so_enter();
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col += so_s_width;
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}
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col += iprintf(fmt, parg);
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if (!any_display)
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{
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/* putchr('\n');*/
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putchr('\r');
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return;
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}
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putstr(return_to_continue);
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so_exit();
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col += sizeof(return_to_continue) + so_e_width;
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#if ONLY_RETURN
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while ((c = getchr()) != '\n' && c != '\r')
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bell();
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#else
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c = getchr();
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if (c != '\n' && c != '\r' && c != ' ' && c != READ_INTR)
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ungetcc(c);
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#endif
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lower_left();
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if (col >= sc_width)
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/*
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* Printing the message has probably scrolled the screen.
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* {{ Unless the terminal doesn't have auto margins,
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* in which case we just hammered on the right margin. }}
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*/
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screen_trashed = 1;
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flush();
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}
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static char intr_to_abort[] = "... (interrupt to abort)";
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/*
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* Output a message in the lower left corner of the screen
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* and don't wait for carriage return.
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* Usually used to warn that we are beginning a potentially
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* time-consuming operation.
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*/
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public void
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ierror(fmt, parg)
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char *fmt;
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PARG *parg;
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{
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lower_left();
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clear_eol();
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so_enter();
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(void) iprintf(fmt, parg);
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putstr(intr_to_abort);
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so_exit();
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flush();
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need_clr = 1;
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}
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/*
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* Output a message in the lower left corner of the screen
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* and return a single-character response.
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*/
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public int
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query(fmt, parg)
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char *fmt;
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PARG *parg;
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{
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register int c;
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int col = 0;
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if (any_display)
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{
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lower_left();
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clear_eol();
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}
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(void) iprintf(fmt, parg);
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c = getchr();
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if (!any_display)
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{
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/* putchr('\n');*/
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putchr('\r');
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return (c);
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}
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lower_left();
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if (col >= sc_width)
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screen_trashed = 1;
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flush();
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return (c);
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}
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