head 1.1;A access ; symbols ; locks ; strict; comment @ * @; 1.1 date 85.03.31.18.11.26; author bbanerje; state Exp; branches ; next ; desc @@ 1.1 log @Initial revision @ text @/* Lisp object printing and output streams. Copyright (C) 1985 Richard M. Stallman. This file is part of GNU Emacs. GNU Emacs is distributed in the hope that it will be useful, but without any warranty. No author or distributor accepts responsibility to anyone for the consequences of using it or for whether it serves any particular purpose or works at all, unless he says so in writing. Everyone is granted permission to copy, modify and redistribute GNU Emacs, but only under the conditions described in the document "GNU Emacs copying permission notice". An exact copy of the document is supposed to have been given to you along with GNU Emacs so that you can know how you may redistribute it all. It should be in a file named COPYING. Among other things, the copyright notice and this notice must be preserved on all copies. */ #include "config.h" #include #undef NULL #include "lisp.h" #ifndef standalone #include "buffer.h" #include "window.h" #include "process.h" #endif Lisp_Object Vstandard_output, Qstandard_output; /* Low level output routines for charaters and strings */ /* Lisp functions to do output using a stream must have the stream in a variable called printcharfun and must start with PRINTPREPARE and end with PRINTFINISH. Use PRINTCHAR to output one character, or call strout to output a block of characters. Also, each one must have the declarations struct buffer *old = bf_cur; int old_dot = -1, start_dot; Lisp_Object original; */ #define PRINTPREPARE \ original = printcharfun; \ if (NULL (printcharfun)) printcharfun = Qt; \ if (XTYPE (printcharfun) == Lisp_Buffer) \ { if (XBUFFER (printcharfun) != bf_cur) SetBfp (XBUFFER (printcharfun)); \ printcharfun = Qnil;}\ if (XTYPE (printcharfun) == Lisp_Marker) \ { if (XMARKER (original)->buffer != bf_cur) \ SetBfp (XMARKER (original)->buffer); \ old_dot = dot; \ SetDot (marker_position (printcharfun)); \ start_dot = dot; \ printcharfun = Qnil;} #define PRINTFINISH \ if (XTYPE (original) == Lisp_Marker) \ Fset_marker (original, make_number (dot), Qnil); \ if (old_dot >= 0) \ SetDot ((old_dot >= start_dot ? dot - start_dot : 0) + old_dot); \ if (old != bf_cur) \ SetBfp (old) #define PRINTCHAR(ch) printchar (ch, printcharfun) /* Buffer for output destined for minibuffer */ static char printbuf[MScreenWidth + 1]; /* Index of first unused element of above */ static int printbufidx; static void printchar (ch, fun) unsigned char ch; Lisp_Object fun; { Lisp_Object ch1; #ifndef standalone if (EQ (fun, Qnil)) { QUIT; InsCStr (&ch, 1); return; } if (EQ (fun, Qt)) { if (minibuf_message != printbuf) minibuf_message = printbuf, printbufidx = 0; if (printbufidx < sizeof printbuf - 1) printbuf[printbufidx++] = ch; printbuf[printbufidx] = 0; return; } #endif standalone XFASTINT (ch1) = ch; call1 (fun, ch1); } static void strout (ptr, size, printcharfun) char *ptr; int size; Lisp_Object printcharfun; { int i = 0; if (EQ (printcharfun, Qnil)) { InsCStr (ptr, size >= 0 ? size : strlen (ptr)); return; } if (EQ (printcharfun, Qt)) { if (minibuf_message != printbuf) minibuf_message = printbuf, printbufidx = 0; i = size >= 0 ? size : strlen (ptr); if (i > sizeof printbuf - printbufidx - 1) i = sizeof printbuf - printbufidx - 1; bcopy (ptr, &printbuf[printbufidx], i); printbufidx += i; printbuf[printbufidx] = 0; return; } if (size >= 0) while (i < size) PRINTCHAR (ptr[i++]); else while (ptr[i]) PRINTCHAR (ptr[i++]); } DEFUN ("write-char", Fwrite_char, Swrite_char, 1, 2, 0, "Output character CHAR to stream STREAM.\n\ STREAM defaults to the value of standard-output (which see).") (ch, printcharfun) Lisp_Object ch, printcharfun; { struct buffer *old = bf_cur; int old_dot = -1; int start_dot; Lisp_Object original; CHECK_NUMBER (ch, 0); PRINTPREPARE; PRINTCHAR (XINT (ch)); PRINTFINISH; return ch; } write_string (data, size) char *data; int size; { struct buffer *old = bf_cur; Lisp_Object printcharfun; int old_dot = -1; int start_dot; Lisp_Object original; printcharfun = Vstandard_output; PRINTPREPARE; strout (data, size, printcharfun); PRINTFINISH; } write_string_1 (data, size, printcharfun) char *data; int size; Lisp_Object printcharfun; { struct buffer *old = bf_cur; int old_dot = -1; int start_dot; Lisp_Object original; PRINTPREPARE; strout (data, size, printcharfun); PRINTFINISH; } #ifndef standalone temp_output_buffer_setup (bufname) char *bufname; { struct buffer *old = bf_cur; Lisp_Object buf; Fset_buffer (Fget_buffer_create (build_string (bufname))); Ferase_buffer (); XSETTYPE (buf, Lisp_Buffer); XSETBUFFER (buf, bf_cur); specbind (Qstandard_output, buf); SetBfp (old); } Lisp_Object internal_with_output_to_temp_buffer (bufname, function, args) char *bufname; Lisp_Object (*function) (); Lisp_Object args; { int count = specpdl_ptr - specpdl; Lisp_Object buf, val; temp_output_buffer_setup (bufname); buf = Vstandard_output; val = function (args); temp_output_buffer_show (buf); unbind_to (count); return val; } DEFUN ("with-output-to-temp-buffer", Fwith_output_to_temp_buffer, Swith_output_to_temp_buffer, 1, UNEVALLED, 0, "Binding standard-output to buffer named BUFNAME, execute BODY then display the buffer.\n\ The buffer is cleared out initially, and marked as unmodified when done.\n\ All output done by BODY is inserted in that buffer by default.\n\ It is displayed in another window, but not selected.\n\ The value of the last form in BODY is returned.") (args) Lisp_Object args; { struct gcpro gcpro1; Lisp_Object name; int count = specpdl_ptr - specpdl; Lisp_Object buf, val; GCPRO1(args); name = Feval (Fcar (args)); UNGCPRO; temp_output_buffer_setup (XSTRING (name)->data); buf = Vstandard_output; val = Fprogn (args); temp_output_buffer_show (buf); unbind_to (count); return val; } #endif standalone static void print (); DEFUN ("terpri", Fterpri, Sterpri, 0, 1, 0, "Output a newline to STREAM (or value of standard-output).") (printcharfun) Lisp_Object printcharfun; { struct buffer *old = bf_cur; int old_dot = -1; int start_dot; Lisp_Object original; if (NULL (printcharfun)) printcharfun = Vstandard_output; PRINTPREPARE; PRINTCHAR ('\n'); PRINTFINISH; return Qt; } DEFUN ("prin1", Fprin1, Sprin1, 1, 2, 0, "Output the printed representation of OBJECT, any Lisp object.\n\ Quoting characters are used, to make output that read can handle\n\ whenever this is possible.\n\ Output stream is STREAM, or value of standard-output (which see).") (obj, printcharfun) Lisp_Object obj, printcharfun; { struct buffer *old = bf_cur; int old_dot = -1; int start_dot; Lisp_Object original; if (NULL (printcharfun)) printcharfun = Vstandard_output; PRINTPREPARE; print (obj, printcharfun, 1); PRINTFINISH; return obj; } DEFUN ("princ", Fprinc, Sprinc, 1, 2, 0, "Output the printed representation of OBJECT, any Lisp object.\n\ No quoting characters are used; no delimiters are printed around\n\ the contents of strings.\n\ Output stream is STREAM, or value of standard-output (which see).") (obj, printcharfun) Lisp_Object obj, printcharfun; { struct buffer *old = bf_cur; int old_dot = -1; int start_dot; Lisp_Object original; if (NULL (printcharfun)) printcharfun = Vstandard_output; PRINTPREPARE; print (obj, printcharfun, 0); PRINTFINISH; return obj; } DEFUN ("print", Fprint, Sprint, 1, 2, 0, "Output the printed representation of OBJECT, with newline before and space after.\n\ Quoting characters are used, to make output that read can handle\n\ whenever this is possible.\n\ Output stream is STREAM, or value of standard-output (which see).") (obj, printcharfun) Lisp_Object obj, printcharfun; { struct buffer *old = bf_cur; int old_dot = -1; int start_dot; Lisp_Object original; if (NULL (printcharfun)) printcharfun = Vstandard_output; PRINTPREPARE; PRINTCHAR ('\n'); print (obj, printcharfun, 1); PRINTCHAR ('\n'); PRINTFINISH; return obj; } static void print (obj, printcharfun, escapeflag) Lisp_Object obj, printcharfun; int escapeflag; { char buf[30]; switch (XTYPE (obj)) { case Lisp_Int: sprintf (buf, "%d", XINT (obj)); strout (buf, -1, printcharfun); break; case Lisp_String: if (!escapeflag) strout (XSTRING (obj)->data, XSTRING (obj)->size, printcharfun); else { int i; unsigned char *p = XSTRING (obj)->data; PRINTCHAR ('\"'); for (i = XSTRING (obj)->size; i > 0; i--) { unsigned char c = *p++; if (c == '\"' || c == '\\') PRINTCHAR ('\\'); PRINTCHAR (c); } PRINTCHAR ('\"'); } break; case Lisp_Symbol: { int i, confusing; unsigned char *p = XSYMBOL (obj)->name->data; unsigned char *end = p + XSYMBOL (obj)->name->size; if (p != end && (*p == '-' || *p == '+')) p++; while (p != end && *p >= '0' && *p <= '9') p++; confusing = (end == p); p = XSYMBOL (obj)->name->data; while (p != end) { char c = *p++; if (escapeflag) { if (c == '\"' || c == '\\' || c == '\'' || c == ';' || c == '#' || c == '(' || c == ')' || c == ',' || c =='.' || c == '`' || c == '[' || c == ']' || c == '?' || c <= 040 || confusing) PRINTCHAR ('\\'), confusing = 0; } PRINTCHAR (c); } } break; case Lisp_Cons: PRINTCHAR ('('); { int i = 0; while (LISTP (obj)) { if (i++) PRINTCHAR (' '); print (Fcar (obj), printcharfun, escapeflag, 0); obj = Fcdr (obj); } } if (!NULL (obj)) { strout (" . ", 3, printcharfun); print (obj, printcharfun, escapeflag, 0); } PRINTCHAR (')'); break; case Lisp_Vector: PRINTCHAR ('['); { register int i; Lisp_Object tem; for (i = 0; i < XVECTOR (obj)->size; i++) { if (i) PRINTCHAR (' '); tem = XVECTOR (obj)->contents[i]; print (tem, printcharfun, escapeflag, 0); } } PRINTCHAR (']'); break; #ifndef standalone case Lisp_Buffer: if (escapeflag) { strout ("#name)->data, -1, printcharfun); PRINTCHAR ('>'); } else strout (XSTRING (XBUFFER (obj)->name)->data, -1, printcharfun); break; case Lisp_Process: if (escapeflag) { strout ("#name)->data, -1, printcharfun); PRINTCHAR ('>'); } else strout (XSTRING (XPROCESS (obj)->name)->data, -1, printcharfun); break; case Lisp_Window: strout ("#sequence_number.i); strout (buf, -1, printcharfun); if (!NULL (XWINDOW (obj)->buffer)) { strout (" on ", -1, printcharfun); strout (XSTRING (XBUFFER (XWINDOW (obj)->buffer)->name)->data, -1, printcharfun); } PRINTCHAR ('>'); break; case Lisp_Marker: strout ("#bufpos); strout (buf, -1, printcharfun); strout (" in ", -1, printcharfun); if (!(XMARKER (obj)->buffer)) strout ("no buffer", -1, printcharfun); else strout (XSTRING (XMARKER (obj)->buffer->name)->data, -1, printcharfun); PRINTCHAR ('>'); break; #endif standalone case Lisp_Subr: strout ("#symbol_name, -1, printcharfun); PRINTCHAR ('>'); break; } } void syms_of_print () { DefLispVar ("standard-output", &Vstandard_output, "Function print uses by default for outputting a character.\n\ This may be any function of one argument.\n\ It may also be a buffer (output is inserted before dot)\n\ or a marker (output is inserted and the marker is advanced)\n\ or the symbol t (output appears in the minibuffer line)."); Vstandard_output = Qt; Qstandard_output = intern ("standard-output"); staticpro (&Qstandard_output); defsubr (&Sprin1); defsubr (&Sprinc); defsubr (&Sprint); defsubr (&Sterpri); defsubr (&Swrite_char); #ifndef standalone defsubr (&Swith_output_to_temp_buffer); #endif standalone } @