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-rw-r--r--src/preproc/grn/hdb.cpp441
1 files changed, 441 insertions, 0 deletions
diff --git a/src/preproc/grn/hdb.cpp b/src/preproc/grn/hdb.cpp
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+++ b/src/preproc/grn/hdb.cpp
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+ /* Last non-groff version: hdb.c 1.8 (Berkeley) 84/10/20
+ *
+ * Copyright -C- 1982 Barry S. Roitblat
+ *
+ * This file contains database routines for the hard copy programs of
+ * the gremlin picture editor.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include "gprint.h"
+#include <string.h>
+#include <ctype.h>
+
+#include "errarg.h"
+#include "error.h"
+
+#define MAXSTRING 128
+#define MAXSTRING_S "127"
+
+/* imports from main.cpp */
+
+extern char gremlinfile[]; /* name of file currently reading */
+extern int SUNFILE; /* TRUE if SUN gremlin file */
+extern int compatibility_flag; /* TRUE if in compatibility mode */
+extern void *grnmalloc(size_t size, const char *what);
+extern void savebounds(double x, double y);
+
+/* imports from hpoint.cpp */
+
+extern POINT *PTInit();
+extern POINT *PTMakePoint(double x, double y, POINT ** pplist);
+
+
+int DBGetType(char *s);
+
+static long lineno = 0; /* line number of gremlin file */
+
+/*
+ * This routine returns a pointer to an initialized database element
+ * which would be the only element in an empty list.
+ */
+ELT *
+DBInit()
+{
+ return ((ELT *) NULL);
+} /* end DBInit */
+
+
+/*
+ * This routine creates a new element with the specified attributes and
+ * links it into database.
+ */
+ELT *
+DBCreateElt(int type,
+ POINT * pointlist,
+ int brush,
+ int size,
+ char *text,
+ ELT **db)
+{
+ ELT *temp = 0;
+
+ temp = (ELT *) grnmalloc(sizeof(ELT), "picture element");
+ temp->nextelt = *db;
+ temp->type = type;
+ temp->ptlist = pointlist;
+ temp->brushf = brush;
+ temp->size = size;
+ temp->textpt = text;
+ *db = temp;
+ return (temp);
+} /* end CreateElt */
+
+
+/*
+ * This routine reads the specified file into a database and returns a
+ * pointer to that database.
+ */
+ELT *
+DBRead(FILE *file)
+{
+ int i;
+ int done; /* flag for input exhausted */
+ double nx; /* x holder so x is not set before orienting */
+ int type; /* element type */
+ ELT *elist; /* pointer to the file's elements */
+ POINT *plist; /* pointer for reading in points */
+ char string[MAXSTRING], *txt;
+ double x, y; /* x and y are read in point coords */
+ int len, brush, size;
+ int lastpoint;
+
+ SUNFILE = FALSE;
+ elist = DBInit();
+ int nitems = fscanf(file, "%" MAXSTRING_S "s%*[^\n]\n", string);
+ if (nitems != 1) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "malformed input; giving up on this"
+ " picture");
+ return (elist);
+ }
+ lineno++;
+ if (strcmp(string, "gremlinfile")) {
+ if (strcmp(string, "sungremlinfile")) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "not a gremlin file; giving up on this"
+ " picture");
+ return (elist);
+ }
+ SUNFILE = TRUE;
+ }
+
+ nitems = fscanf(file, "%d%lf%lf\n", &size, &x, &y);
+ if (nitems != 3) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "malformed input; giving up on this"
+ " picture");
+ return (elist);
+ }
+ lineno++;
+ /* ignore orientation and file positioning point */
+
+ done = FALSE;
+ while (!done) {
+ /* if (fscanf(file,"%" MAXSTRING_S "s\n", string) == EOF) */
+ /* I changed the scanf format because the element */
+ /* can have two words (e.g. CURVE SPLINE) */
+ if (fscanf(file, "\n%"
+ MAXSTRING_S
+ "[^\n]%*[^\n]\n", string) == EOF) {
+ lineno++;
+ error_with_file_and_line(gremlinfile, lineno, "error in format;"
+ " giving up on this picture");
+ return (elist);
+ }
+ lineno++;
+
+ type = DBGetType(string); /* interpret element type */
+ if (type < 0) { /* no more data */
+ done = TRUE;
+ } else {
+ /* always one point */
+#ifdef UW_FASTSCAN
+ (void) xscanf(file, &x, &y);
+#else
+ nitems = fscanf(file, "%lf%lf\n", &x, &y);
+ if (nitems != 2) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "malformed input; giving up on this"
+ " picture");
+ return (elist);
+ }
+ lineno++;
+#endif /* UW_FASTSCAN */
+ plist = PTInit(); /* NULL point list */
+
+ /*
+ * Files created on the SUN have point lists terminated by a line
+ * containing only an asterisk ('*'). Files created on the AED
+ * have point lists terminated by the coordinate pair (-1.00
+ * -1.00).
+ */
+ if (TEXT(type)) { /* read only first point for TEXT elements */
+ nx = xorn(x, y);
+ y = yorn(x, y);
+ (void) PTMakePoint(nx, y, &plist);
+ savebounds(nx, y);
+
+#ifdef UW_FASTSCAN
+ while (xscanf(file, &x, &y));
+#else
+ lastpoint = FALSE;
+ do {
+ char *cp = fgets(string, MAXSTRING, file);
+ if (0 /* nullptr */ == cp) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "premature end-of-file or error"
+ " reading input; giving up on this"
+ " picture");
+ return(elist);
+ }
+ lineno++;
+ if (string[0] == '*') { /* SUN gremlin file */
+ lastpoint = TRUE;
+ } else {
+ if (!sscanf(string, "%lf%lf", &x, &y)) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "expected coordinate pair, got"
+ " '%1'; giving up on this"
+ " picture", string);
+ return(elist);
+ }
+ if ((x == -1.00 && y == -1.00) && (!SUNFILE))
+ lastpoint = TRUE;
+ else {
+ if (compatibility_flag)
+ savebounds(xorn(x, y), yorn(x, y));
+ }
+ }
+ } while (!lastpoint);
+#endif /* UW_FASTSCAN */
+ } else { /* not TEXT element */
+#ifdef UW_FASTSCAN
+ do {
+ nx = xorn(x, y);
+ y = yorn(x, y);
+ (void) PTMakePoint(nx, y, &plist);
+ savebounds(nx, y);
+ } while (xscanf(file, &x, &y));
+#else
+ lastpoint = FALSE;
+ while (!lastpoint) {
+ nx = xorn(x, y);
+ y = yorn(x, y);
+ (void) PTMakePoint(nx, y, &plist);
+ savebounds(nx, y);
+
+ char *cp = fgets(string, MAXSTRING, file);
+ if (0 /* nullptr */ == cp) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "premature end-of-file or error"
+ " reading input; giving up on this"
+ " picture");
+ return(elist);
+ }
+ lineno++;
+ if (string[0] == '*') { /* SUN gremlin file */
+ lastpoint = TRUE;
+ } else {
+ (void) sscanf(string, "%lf%lf", &x, &y);
+ if ((x == -1.00 && y == -1.00) && (!SUNFILE))
+ lastpoint = TRUE;
+ }
+ }
+#endif /* UW_FASTSCAN */
+ }
+ nitems = fscanf(file, "%d%d\n", &brush, &size);
+ if (nitems != 2) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "malformed input; giving up on this"
+ " picture");
+ return (elist);
+ }
+ lineno++;
+ nitems = fscanf(file, "%d", &len); /* text length */
+ if (nitems != 1) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "malformed input; giving up on this"
+ " picture");
+ return (elist);
+ }
+ (void) getc(file); /* eat blank */
+ lineno++; /* advance line counter early */
+ if (len < 0) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "length claimed for text is nonsense:"
+ " '%1'; giving up on this picture",
+ len);
+ return (elist);
+ }
+ txt = (char *) grnmalloc((unsigned) len + 1, "element text");
+ for (i = 0; i < len; ++i) { /* read text */
+ int c = getc(file);
+ if (c == EOF)
+ break;
+ txt[i] = c;
+ }
+ if (feof(file)) {
+ error_with_file_and_line(gremlinfile, lineno,
+ "end of file while reading text of"
+ " length %1; giving up on this"
+ " picture", len);
+ return (elist);
+ }
+ txt[len] = '\0';
+ (void) DBCreateElt(type, plist, brush, size, txt, &elist);
+ } /* end else */
+ } /* end while not done */ ;
+ return (elist);
+} /* end DBRead */
+
+
+/*
+ * Interpret element type in string s.
+ * Old file format consisted of integer element types.
+ * New file format has literal names for element types.
+ */
+int
+DBGetType(char *s)
+{
+ if (isdigit(s[0]) || (s[0] == '-')) /* old element format or EOF */
+ return (atoi(s));
+
+ switch (s[0]) {
+ case 'P':
+ return (POLYGON);
+ case 'V':
+ return (VECTOR);
+ case 'A':
+ return (ARC);
+ case 'C':
+ if (s[1] == 'U') {
+ if (s[5] == '\n')
+ return (CURVE);
+ switch (s[7]) {
+ case 'S':
+ return(BSPLINE);
+ case 'E':
+ warning_with_file_and_line(gremlinfile, lineno,
+ "using B-spline for Bezier curve");
+ return(BSPLINE);
+ default:
+ return(CURVE);
+ }
+ }
+ switch (s[4]) {
+ case 'L':
+ return (CENTLEFT);
+ case 'C':
+ return (CENTCENT);
+ case 'R':
+ return (CENTRIGHT);
+ default:
+ error_with_file_and_line(gremlinfile, lineno,
+ "unknown element type '%1'", s);
+ return -1;
+ }
+ case 'B':
+ switch (s[3]) {
+ case 'L':
+ return (BOTLEFT);
+ case 'C':
+ return (BOTCENT);
+ case 'R':
+ return (BOTRIGHT);
+ default:
+ error_with_file_and_line(gremlinfile, lineno,
+ "unknown element type '%1'", s);
+ return -1;
+ }
+ case 'T':
+ switch (s[3]) {
+ case 'L':
+ return (TOPLEFT);
+ case 'C':
+ return (TOPCENT);
+ case 'R':
+ return (TOPRIGHT);
+ default:
+ error_with_file_and_line(gremlinfile, lineno,
+ "unknown element type '%1'", s);
+ return -1;
+ }
+ default:
+ error_with_file_and_line(gremlinfile, lineno,
+ "unknown element type '%1'", s);
+ return -1;
+ }
+}
+
+#ifdef UW_FASTSCAN
+/*
+ * Optimization hack added by solomon@crys.wisc.edu, 12/2/86.
+ * A huge fraction of the time was spent reading floating point numbers
+ * from the input file, but the numbers always have the format 'ddd.dd'.
+ * Thus the following special-purpose version of fscanf.
+ *
+ * xscanf(f,xp,yp) does roughly what fscanf(f,"%f%f",xp,yp) does except:
+ * -the next piece of input must be of the form
+ * <space>* <digit>*'.'<digit>* <space>* <digit>*'.'<digit>*
+ * -xscanf eats the character following the second number
+ * -xscanf returns 0 for "end-of-data" indication, 1 otherwise, where
+ * end-of-data is signalled by a '*' [in which case the rest of the
+ * line is gobbled], or by '-1.00 -1.00' [but only if !SUNFILE].
+ */
+int
+xscanf(FILE *f,
+ double *xp,
+ double *yp)
+{
+ int c, i, j, m, frac;
+ int iscale = 1, jscale = 1; /* x = i/scale, y=j/jscale */
+
+ while ((c = getc(f)) == ' ');
+ if (c == '*') {
+ while ((c = getc(f)) != '\n');
+ return 0;
+ }
+ i = m = frac = 0;
+ while (isdigit(c) || c == '.' || c == '-') {
+ if (c == '-') {
+ m++;
+ c = getc(f);
+ continue;
+ }
+ if (c == '.')
+ frac = 1;
+ else {
+ if (frac)
+ iscale *= 10;
+ i = 10 * i + c - '0';
+ }
+ c = getc(f);
+ }
+ if (m)
+ i = -i;
+ *xp = (double) i / (double) iscale;
+
+ while ((c = getc(f)) == ' ');
+ j = m = frac = 0;
+ while (isdigit(c) || c == '.' || c == '-') {
+ if (c == '-') {
+ m++;
+ c = getc(f);
+ continue;
+ }
+ if (c == '.')
+ frac = 1;
+ else {
+ if (frac)
+ jscale *= 10;
+ j = 10 * j + c - '0';
+ }
+ c = getc(f);
+ }
+ if (m)
+ j = -j;
+ *yp = (double) j / (double) jscale;
+ return (SUNFILE || i != -iscale || j != -jscale);
+}
+#endif /* UW_FASTSCAN */
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
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