patch 9.0.0110: help tag generation picks up words in code examplesv9.0.0110

Problem:    Help tag generation picks up words in code examples.
Solution:   Skip over examples. (Carlo Teubner, closes #10813)

1 files changed, 22 insertions, 10 deletions

diff --git a/runtime/doc/doctags.c b/runtime/doc/doctags.c
index f0dea2c87d..8822dcb9ac 100644
--- a/runtime/doc/doctags.c
+++ b/runtime/doc/doctags.c
@@ -21,6 +21,8 @@ main(int argc, char **argv)
 	char	*p1, *p2;
 	char	*p;
 	FILE	*fd;
+	int		len;
+	int		in_example;
 
 	if (argc <= 1)
 	{
@@ -37,22 +39,28 @@ main(int argc, char **argv)
 			fprintf(stderr, "Unable to open %s for reading\n", argv[0]);
 			continue;
 		}
+		in_example = 0;
 		while (fgets(line, LINELEN, fd) != NULL)
 		{
-			p1 = strchr(line, '*');				/* find first '*' */
+			if (in_example)
+			{
+				// skip over example; non-blank in first column ends example
+				if (strchr(" \t\n\r", line[0]) != NULL)
+					continue;
+				in_example = 0;
+			}
+			p1 = strchr(line, '*');				// find first '*'
 			while (p1 != NULL)
 			{
-				p2 = strchr(p1 + 1, '*');		/* find second '*' */
-				if (p2 != NULL && p2 > p1 + 1)	/* skip "*" and "**" */
+				p2 = strchr(p1 + 1, '*');		// find second '*'
+				if (p2 != NULL && p2 > p1 + 1)	// skip "*" and "**"
 				{
 					for (p = p1 + 1; p < p2; ++p)
 						if (*p == ' ' || *p == '\t' || *p == '|')
 							break;
-					/*
-					 * Only accept a *tag* when it consists of valid
-					 * characters, there is white space before it and is
-					 * followed by a white character or end-of-line.
-					 */
+					// Only accept a *tag* when it consists of valid
+					// characters, there is white space before it and is
+					// followed by a white character or end-of-line.
 					if (p == p2
 							&& (p1 == line || p1[-1] == ' ' || p1[-1] == '\t')
 								&& (strchr(" \t\n\r", p[1]) != NULL
@@ -63,18 +71,22 @@ main(int argc, char **argv)
 						printf("%s\t%s\t/*", p1, argv[0]);
 						while (*p1)
 						{
-							/* insert backslash before '\\' and '/' */
+							// insert backslash before '\\' and '/'
 							if (*p1 == '\\' || *p1 == '/')
 								putchar('\\');
 							putchar(*p1);
 							++p1;
 						}
 						printf("*\n");
-						p2 = strchr(p2 + 1, '*');		/* find next '*' */
+						p2 = strchr(p2 + 1, '*');		// find next '*'
 					}
 				}
 				p1 = p2;
 			}
+			len = strlen(line);
+			if ((len == 2 && strcmp(&line[len - 2], ">\n") == 0)
+					|| (len >= 3 && strcmp(&line[len - 3], " >\n") == 0))
+				in_example = 1;
 		}
 		fclose(fd);
 	}