From 3ce7811758c351df069ae36c55886af8b577cb66 Mon Sep 17 00:00:00 2001
From: dx <aryadevchavali1@gmail.com>
Date: Wed, 6 May 2020 06:03:32 +0100
Subject: +routine to compile plain text +diagnostics
This routine will handle asterisks and bullet points.
Works by checking characters at each step.
Also has diagnostics by checking for matching characters. If a matching
asterisk, for example, isn't found then present an error and quit.
---
Converter/includes/compiler.h | 3 +-
Converter/src/compiler.c | 112 ++++++++++++++++++++++++++++++++++++++++--
2 files changed, 109 insertions(+), 6 deletions(-)
diff --git a/Converter/includes/compiler.h b/Converter/includes/compiler.h
index b0b6d43..8b2fa1f 100644
--- a/Converter/includes/compiler.h
+++ b/Converter/includes/compiler.h
@@ -2,7 +2,8 @@
#define __COMPILER_H_
#include <stdlib.h>
+
typedef char *string;
-string compile_line(string line, size_t size_of_line);
+string compile_line(string line, size_t size_of_line, string line_or_source);
#endif // __COMPILER_H_
diff --git a/Converter/src/compiler.c b/Converter/src/compiler.c
index 1c5b728..c6060be 100644
--- a/Converter/src/compiler.c
+++ b/Converter/src/compiler.c
@@ -2,15 +2,116 @@
#include <stdio.h>
#include <string.h>
-string compile_line(string line, size_t size_of_line)
+void compile_plain_text(string dest, string src, size_t size_of_line,
+ string line_or_source)
+{
+ /* cursor is the current index on the dest pointer
+ * lower represents the last tag character before content
+ * upper represents the first tag character after content
+ *
+ * size_of_content is self explanatory (size of content in tags)
+ * tag_size is the compiled size of a tag
+ * md_tag_size is the precompiled size of a tag
+ *
+ * tag is the string for the open HTML tag
+ * close_tag is the string for the close HTML tag
+ *
+ * i and j are iterator variables
+ */
+ int cursor, lower, upper;
+ size_t size_of_content, tag_size, md_tag_size;
+ string tag, close_tag;
+ int i, j;
+
+ lower = 0;
+ upper = 0;
+ cursor = 0;
+
+ for (i = 0; i < size_of_line; ++i)
+ {
+ // Asterisk routine
+ if (src[i] == '*')
+ {
+ j = i + 1;
+
+ // Twin asterisks
+ if (src[i + 1] == '*')
+ {
+ tag = "<strong>";
+ close_tag = "</strong>";
+ tag_size = 8;
+ md_tag_size = 2;
+
+ // Make j the cursor seeking for the matching asterisk pair
+ while ((j < size_of_line - 1) && (src[j] != '*' || src[j + 1] != '*'))
+ ++j;
+
+ // if found
+ if (src[j] == '*')
+ {
+ lower = i + 1;
+ upper = j;
+ }
+ else
+ {
+ // ERROR
+ fprintf(stderr, "No matching asterisk for %s:%d\n", line_or_source,
+ i);
+ exit(-1);
+ }
+ }
+
+ // one asterisk
+ else
+ {
+ tag = "<i>";
+ close_tag = "</i>";
+ tag_size = 3;
+ md_tag_size = 1;
+ while ((j < size_of_line) && (src[j] != '*')) ++j;
+
+ if (src[j] == '*')
+ {
+ lower = i;
+ upper = j;
+ }
+ else
+ {
+ // error, no matching asterisk
+ fprintf(stderr, "No matching asterisk for %s:%d\n", line_or_source,
+ i);
+ exit(-1);
+ }
+ }
+
+ /*
+ * Copy all
+ */
+ size_of_content = upper - lower - 1;
+ strncpy(dest + cursor, tag, tag_size);
+ strncpy(dest + cursor + tag_size, src + lower + 1, size_of_content);
+ strncpy(dest + cursor + tag_size + size_of_content, close_tag,
+ tag_size + 1);
+ cursor +=
+ tag_size + size_of_content + tag_size + 1; // shift after operation
+ i += size_of_content + (2 * md_tag_size) - 1;
+ }
+ else
+ {
+ strncpy(dest + cursor, &src[i], 1);
+ cursor += 1;
+ }
+ }
+}
+
+string compile_line(string line, size_t size_of_line, string line_or_source)
{
string compiled_line;
size_t size_of_content;
+ // Compile a header
if (line[0] == '#')
{
- // Compile a header
-
// Get the level of header (h1, h2, etc)
int depth;
for (depth = 1; line[depth] == '#'; ++depth) continue;
@@ -38,8 +139,9 @@ string compile_line(string line, size_t size_of_line)
else
{
- compiled_line = malloc(sizeof(*compiled_line) * size_of_line);
- strncpy(compiled_line, line, size_of_line);
+ // Assume standard text
+ compiled_line = malloc(sizeof(*compiled_line) * size_of_line * 2);
+ compile_plain_text(compiled_line, line, size_of_line, line_or_source);
}
return compiled_line;
--
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