On Sun, Aug 23, 2009 at 06:33:49PM -0400, Alvaro Herrera wrote:
> Roger Leigh escribió:
> 
> > +#if (defined(HAVE_LANGINFO_H) && defined(CODESET))
> > +   if (!strcmp(nl_langinfo(CODESET), "UTF-8"))
> > +           text_format = &utf8format;
> > +#endif
> 
> I think you should also try to match to "UTF8", and do it in
> case-insensitive manner (pg_strcasecmp), just like chklocale.c.

An updated copy of the patch is attached.  This has the following
changes:

- matches UTF-8, utf8 and CP65001 case insensitively as for chklocale.c
- uses fprintf in place of repeated fputs/fputc calls
- moved hrule from table to line formatting
- moved vrule from table to separate line format

The latter two allow complete specification of all the characters used
to draw.  You can now have different horizonal rule types for the
different line types (demonstrated by making PRINT_RULE_MIDDLE thick
rather than thin).  The same applies to the vertical rules, but since
these are drawn intermixed with data these are a separate line format
in their own right (PRINT_RULE_DATA).

You can if you like make incredibly ugly tables consisting of all sorts
of thin, thick and double ruled lines running horizontally and
vertically at all edges and positions.  The patch as it is keeps this
subtle!  But, a potential future extension to this could be a \pset
command to customise the table style in addition to border printing,
since the code is now there to do this.


Regards,
Roger

-- 
  .''`.  Roger Leigh
 : :' :  Debian GNU/Linux             http://people.debian.org/~rleigh/
 `. `'   Printing on GNU/Linux?       http://gutenprint.sourceforge.net/
   `-    GPG Public Key: 0x25BFB848   Please GPG sign your mail.
diff --git a/src/bin/psql/print.c b/src/bin/psql/print.c
index 7505cd4..1740109 100644
--- a/src/bin/psql/print.c
+++ b/src/bin/psql/print.c
@@ -21,6 +21,9 @@
 #endif
 
 #include <locale.h>
+#ifdef HAVE_LANGINFO_H
+#include <langinfo.h>
+#endif
 
 #include "catalog/pg_type.h"
 #include "pqsignal.h"
@@ -356,38 +359,66 @@ print_unaligned_vertical(const printTableContent *cont, FILE *fout)
 /* Aligned text		*/
 /********************/
 
+static const printTextFormat asciiformat =
+{
+	{
+		{ "-", "+", "+", "+" },
+		{ "-", "+", "+", "+" },
+		{ "-", "+", "+", "+" },
+		{ "",  "|", "|", "|" }
+	}
+};
+
+static const struct printTextFormat utf8format =
+{
+	{
+	  /* ─, ┌, ┬, ┐ */
+	  { "\342\224\200", "\342\224\214", "\342\224\254", "\342\224\220" },
+	  /* ━, ┝, ┿, ┥ */
+	  { "\342\224\201", "\342\224\235", "\342\224\277", "\342\224\245" },
+	  /* ─, └, ┴, ┘ */
+	  { "\342\224\200", "\342\224\224", "\342\224\264", "\342\224\230" },
+	  /* N/A, │, │, │ */
+	  { "", "\342\224\202", "\342\224\202", "\342\224\202" }
+	},
+};
 
 /* draw "line" */
 static void
 _print_horizontal_line(const unsigned int ncolumns, const unsigned int *widths,
-					   unsigned short border, FILE *fout)
+		       unsigned short border, printTextRule pos,
+		       const printTextFormat *format,
+		       FILE *fout)
 {
 	unsigned int i,
 				j;
 
+	const printTextLineFormat *lformat = &format->lrule[pos];
+
 	if (border == 1)
-		fputc('-', fout);
+		fputs(lformat->hrule, fout);
 	else if (border == 2)
-		fputs("+-", fout);
+		fprintf(fout, "%s%s", lformat->leftvrule, lformat->hrule);
 
 	for (i = 0; i < ncolumns; i++)
 	{
 		for (j = 0; j < widths[i]; j++)
-			fputc('-', fout);
+			fputs(lformat->hrule, fout);
 
 		if (i < ncolumns - 1)
 		{
 			if (border == 0)
 				fputc(' ', fout);
 			else
-				fputs("-+-", fout);
+				fprintf(fout, "%s%s%s", lformat->hrule,
+					lformat->midvrule, lformat->hrule);
 		}
 	}
 
 	if (border == 2)
-		fputs("-+", fout);
+		fprintf(fout, "%s%s", lformat->hrule, lformat->rightvrule);
 	else if (border == 1)
-		fputc('-', fout);
+		fputs(lformat->hrule, fout);
 
 	fputc('\n', fout);
 }
@@ -397,7 +428,8 @@ _print_horizontal_line(const unsigned int ncolumns, const unsigned int *widths,
  *	Print pretty boxes around cells.
  */
 static void
-print_aligned_text(const printTableContent *cont, FILE *fout)
+print_aligned_text(const printTableContent *cont, const printTextFormat *format,
+		   FILE *fout)
 {
 	bool		opt_tuples_only = cont->opt->tuples_only;
 	bool		opt_numeric_locale = cont->opt->numericLocale;
@@ -431,6 +463,7 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 	int		   *bytes_output;	/* Bytes output for column value */
 	int			output_columns = 0;		/* Width of interactive console */
 	bool		is_pager = false;
+	const printTextLineFormat	*dformat = &format->lrule[PRINT_RULE_DATA];
 
 	if (cancel_pressed)
 		return;
@@ -709,7 +742,7 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 			int			curr_nl_line;
 
 			if (opt_border == 2)
-				_print_horizontal_line(col_count, width_wrap, opt_border, fout);
+				_print_horizontal_line(col_count, width_wrap, opt_border, PRINT_RULE_TOP, format, fout);
 
 			for (i = 0; i < col_count; i++)
 				pg_wcsformat((unsigned char *) cont->headers[i],
@@ -722,7 +755,7 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 			while (more_col_wrapping)
 			{
 				if (opt_border == 2)
-					fprintf(fout, "|%c", curr_nl_line ? '+' : ' ');
+					fprintf(fout, "%s%c", dformat->leftvrule, curr_nl_line ? '+' : ' ');
 				else if (opt_border == 1)
 					fputc(curr_nl_line ? '+' : ' ', fout);
 
@@ -753,19 +786,20 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 						if (opt_border == 0)
 							fputc(curr_nl_line ? '+' : ' ', fout);
 						else
-							fprintf(fout, " |%c", curr_nl_line ? '+' : ' ');
+							fprintf(fout, " %s%c", dformat->midvrule, curr_nl_line ? '+' : ' ');
 					}
 				}
 				curr_nl_line++;
 
 				if (opt_border == 2)
-					fputs(" |", fout);
+					fprintf(fout, " %s",
+						dformat->rightvrule);
 				else if (opt_border == 1)
 					fputc(' ', fout);
 				fputc('\n', fout);
 			}
 
-			_print_horizontal_line(col_count, width_wrap, opt_border, fout);
+			_print_horizontal_line(col_count, width_wrap, opt_border, PRINT_RULE_MIDDLE, format, fout);
 		}
 	}
 
@@ -811,7 +845,7 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 
 			/* left border */
 			if (opt_border == 2)
-				fputs("| ", fout);
+				fprintf(fout, "%s ", dformat->leftvrule);
 			else if (opt_border == 1)
 				fputc(' ', fout);
 
@@ -891,15 +925,16 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 					/* After first newline value */
 					else if (curr_nl_line[j + 1] != 0)
 						fputs(" : ", fout);
+					/* Ordinary line */
 					else
-						/* Ordinary line */
-						fputs(" | ", fout);
+						fprintf(fout, " %s ",
+							dformat->midvrule);
 				}
 			}
 
 			/* end-of-row border */
 			if (opt_border == 2)
-				fputs(" |", fout);
+				fprintf(fout, " %s", dformat->rightvrule);
 			fputc('\n', fout);
 
 		} while (more_lines);
@@ -908,7 +943,7 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 	if (cont->opt->stop_table)
 	{
 		if (opt_border == 2 && !cancel_pressed)
-			_print_horizontal_line(col_count, width_wrap, opt_border, fout);
+			_print_horizontal_line(col_count, width_wrap, opt_border, PRINT_RULE_BOTTOM, format, fout);
 
 		/* print footers */
 		if (cont->footers && !opt_tuples_only && !cancel_pressed)
@@ -941,9 +976,67 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
 		ClosePager(fout);
 }
 
+static inline void
+print_aligned_vertical_line(const printTableContent *cont,
+			    unsigned long record,
+			    unsigned int hwidth,
+			    unsigned int dwidth,
+			    printTextRule pos,
+			    const printTextFormat *format,
+			    FILE *fout)
+{
+	unsigned short	opt_border = cont->opt->border;
+	unsigned int	i;
+	int		reclen = 0;
+	const printTextLineFormat	*lformat = &format->lrule[pos];
+
+	if (opt_border == 2)
+		fprintf(fout, "%s%s", lformat->leftvrule, lformat->hrule);
+	else if (opt_border == 1)
+		fputs(lformat->hrule, fout);
+
+	if (record)
+	{
+		if (opt_border == 0)
+			reclen = fprintf(fout, "* Record %lu", record);
+		else
+			reclen = fprintf(fout, "[ RECORD %lu ]", record);
+	}
+	if (opt_border != 2)
+		reclen++;
+	if (reclen < 0)
+		reclen = 0;
+	for (i = reclen; i < hwidth; i++)
+		fputs(opt_border > 0 ? lformat->hrule : " ", fout);
+	reclen -= hwidth;
+
+	if (opt_border > 0)
+	{
+		if (reclen-- <= 0)
+			fputs(lformat->hrule, fout);
+		if (reclen-- <= 0)
+			fputs(lformat->midvrule, fout);
+		if (reclen-- <= 0)
+			fputs(lformat->hrule, fout);
+	}
+	else
+	{
+		if (reclen-- <= 0)
+			fputc(' ', fout);
+	}
+	if (reclen < 0)
+		reclen = 0;
+	for (i = reclen; i < dwidth; i++)
+		fputs(opt_border > 0 ? lformat->hrule : " ", fout);
+	if (opt_border == 2)
+		fprintf(fout, "%s%s", lformat->hrule, lformat->rightvrule);
+	fputc('\n', fout);
+}
 
 static void
-print_aligned_vertical(const printTableContent *cont, FILE *fout)
+print_aligned_vertical(const printTableContent *cont,
+		       const printTextFormat *format,
+		       FILE *fout)
 {
 	bool		opt_tuples_only = cont->opt->tuples_only;
 	bool		opt_numeric_locale = cont->opt->numericLocale;
@@ -958,9 +1051,9 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 				dheight = 1,
 				hformatsize = 0,
 				dformatsize = 0;
-	char	   *divider;
 	struct lineptr *hlineptr,
 			   *dlineptr;
+	const printTextLineFormat	*dformat = &format->lrule[PRINT_RULE_DATA];
 
 	if (cancel_pressed)
 		return;
@@ -1026,21 +1119,6 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 	dlineptr->ptr = pg_local_malloc(dformatsize);
 	hlineptr->ptr = pg_local_malloc(hformatsize);
 
-	/* make horizontal border */
-	divider = pg_local_malloc(hwidth + dwidth + 10);
-	divider[0] = '\0';
-	if (opt_border == 2)
-		strcat(divider, "+-");
-	for (i = 0; i < hwidth; i++)
-		strcat(divider, opt_border > 0 ? "-" : " ");
-	if (opt_border > 0)
-		strcat(divider, "-+-");
-	else
-		strcat(divider, " ");
-	for (i = 0; i < dwidth; i++)
-		strcat(divider, opt_border > 0 ? "-" : " ");
-	if (opt_border == 2)
-		strcat(divider, "-+");
 
 	if (cont->opt->start_table)
 	{
@@ -1052,40 +1130,25 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 	/* print records */
 	for (i = 0, ptr = cont->cells; *ptr; i++, ptr++)
 	{
-		int			line_count,
-					dcomplete,
-					hcomplete;
+		int		line_count,
+	    			dcomplete,
+				hcomplete;
+		printTextRule	pos = PRINT_RULE_MIDDLE;
+		if (i == 0)
+	  		pos = PRINT_RULE_TOP;
+		else if (!(*(ptr+1)))
+			pos = PRINT_RULE_BOTTOM;
+
+		if (cancel_pressed)
+			break;
 
 		if (i % cont->ncolumns == 0)
 		{
-			if (cancel_pressed)
-				break;
-			if (!opt_tuples_only)
-			{
-				char		record_str[64];
-				size_t		record_str_len;
-
-				if (opt_border == 0)
-					snprintf(record_str, 64, "* Record %lu", record++);
-				else
-					snprintf(record_str, 64, "[ RECORD %lu ]", record++);
-				record_str_len = strlen(record_str);
-
-				if (record_str_len + opt_border > strlen(divider))
-					fprintf(fout, "%.*s%s\n", opt_border, divider, record_str);
-				else
-				{
-					char	   *div_copy = pg_strdup(divider);
-
-					strncpy(div_copy + opt_border, record_str, record_str_len);
-					fprintf(fout, "%s\n", div_copy);
-					free(div_copy);
-				}
-			}
+	    		if (!opt_tuples_only)
+				print_aligned_vertical_line(cont, record++, hwidth, dwidth, pos, format, fout);
 			else if (i != 0 || !cont->opt->start_table || opt_border == 2)
-				fprintf(fout, "%s\n", divider);
+				print_aligned_vertical_line(cont, 0, hwidth, dwidth, pos, format, fout);
 		}
-
 		/* Format the header */
 		pg_wcsformat((unsigned char *) cont->headers[i % cont->ncolumns],
 					 strlen(cont->headers[i % cont->ncolumns]),
@@ -1099,7 +1162,7 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 		while (!dcomplete || !hcomplete)
 		{
 			if (opt_border == 2)
-				fputs("| ", fout);
+				fprintf(fout, "%s ", dformat->leftvrule);
 			if (!hcomplete)
 			{
 				fprintf(fout, "%-s%*s", hlineptr[line_count].ptr,
@@ -1112,9 +1175,9 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 				fprintf(fout, "%*s", hwidth, "");
 
 			if (opt_border > 0)
-				fprintf(fout, " %c ", (line_count == 0) ? '|' : ':');
+				fprintf(fout, " %s ", (line_count == 0) ? dformat->midvrule : ":");
 			else
-				fputs(" ", fout);
+				fputc(' ', fout);
 
 			if (!dcomplete)
 			{
@@ -1125,8 +1188,8 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 					if (opt_border < 2)
 						fprintf(fout, "%s\n", my_cell);
 					else
-						fprintf(fout, "%-s%*s |\n", my_cell,
-								(int) (dwidth - strlen(my_cell)), "");
+						fprintf(fout, "%-s%*s %s\n", my_cell,
+								(int) (dwidth - strlen(my_cell)), "", dformat->rightvrule);
 					free(my_cell);
 				}
 				else
@@ -1134,8 +1197,8 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 					if (opt_border < 2)
 						fprintf(fout, "%s\n", dlineptr[line_count].ptr);
 					else
-						fprintf(fout, "%-s%*s |\n", dlineptr[line_count].ptr,
-								dwidth - dlineptr[line_count].width, "");
+						fprintf(fout, "%-s%*s %s\n", dlineptr[line_count].ptr,
+								dwidth - dlineptr[line_count].width, "", dformat->rightvrule);
 				}
 
 				if (!dlineptr[line_count + 1].ptr)
@@ -1146,7 +1209,7 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 				if (opt_border < 2)
 					fputc('\n', fout);
 				else
-					fprintf(fout, "%*s |\n", dwidth, "");
+					fprintf(fout, "%*s %s\n", dwidth, "", dformat->rightvrule);
 			}
 			line_count++;
 		}
@@ -1155,7 +1218,7 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 	if (cont->opt->stop_table)
 	{
 		if (opt_border == 2 && !cancel_pressed)
-			fprintf(fout, "%s\n", divider);
+			print_aligned_vertical_line(cont, 0, hwidth, dwidth, PRINT_RULE_BOTTOM, format, fout);
 
 		/* print footers */
 		if (!opt_tuples_only && cont->footers != NULL && !cancel_pressed)
@@ -1171,7 +1234,6 @@ print_aligned_vertical(const printTableContent *cont, FILE *fout)
 		fputc('\n', fout);
 	}
 
-	free(divider);
 	free(hlineptr->ptr);
 	free(dlineptr->ptr);
 	free(hlineptr);
@@ -2208,7 +2270,15 @@ IsPagerNeeded(const printTableContent *cont, const int extra_lines, FILE **fout,
 void
 printTable(const printTableContent *cont, FILE *fout, FILE *flog)
 {
-	bool		is_pager = false;
+	bool			is_pager = false;
+	const printTextFormat	*text_format = &asciiformat;
+
+#if (defined(HAVE_LANGINFO_H) && defined(CODESET))
+	if (pg_strcasecmp(nl_langinfo(CODESET), "UTF-8") == 0 ||
+	    pg_strcasecmp(nl_langinfo(CODESET), "utf8") == 0 ||
+	    pg_strcasecmp(nl_langinfo(CODESET), "CP65001") == 0)
+		text_format = &utf8format;
+#endif
 
 	if (cancel_pressed)
 		return;
@@ -2225,7 +2295,7 @@ printTable(const printTableContent *cont, FILE *fout, FILE *flog)
 	/* print the stuff */
 
 	if (flog)
-		print_aligned_text(cont, flog);
+		print_aligned_text(cont, text_format, flog);
 
 	switch (cont->opt->format)
 	{
@@ -2238,9 +2308,9 @@ printTable(const printTableContent *cont, FILE *fout, FILE *flog)
 		case PRINT_ALIGNED:
 		case PRINT_WRAPPED:
 			if (cont->opt->expanded)
-				print_aligned_vertical(cont, fout);
+				print_aligned_vertical(cont, text_format, fout);
 			else
-				print_aligned_text(cont, fout);
+				print_aligned_text(cont, text_format, fout);
 			break;
 		case PRINT_HTML:
 			if (cont->opt->expanded)
diff --git a/src/bin/psql/print.h b/src/bin/psql/print.h
index 55122d7..7b53fae 100644
--- a/src/bin/psql/print.h
+++ b/src/bin/psql/print.h
@@ -95,6 +95,27 @@ typedef struct printQueryOpt
 										 * gettext on col i */
 } printQueryOpt;
 
+typedef struct printTextLineFormat
+{
+	const char *hrule;
+	const char *leftvrule;
+	const char *midvrule;
+	const char *rightvrule;
+} printTextLineFormat;
+
+typedef struct printTextFormat
+{
+	printTextLineFormat	lrule[4];
+} printTextFormat;
+
+typedef enum printTextRule
+{
+	PRINT_RULE_TOP,
+	PRINT_RULE_MIDDLE,
+	PRINT_RULE_BOTTOM,
+	PRINT_RULE_DATA
+} printTextRule;
+
 
 extern FILE *PageOutput(int lines, unsigned short int pager);
 extern void ClosePager(FILE *pagerpipe);

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