From 76df4d98d4eb88caf16bdf903978c32feba563ef Mon Sep 17 00:00:00 2001
From: daniel-Jones <daniel@danieljon.es>
Date: Sun, 14 Oct 2018 13:23:35 +1030
Subject: first code push

---
 input.txt | 10 +++++++
 main.c    | 12 +++++++++
 replace.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 replace.h | 28 ++++++++++++++++++++
 4 files changed, 140 insertions(+)
 create mode 100644 input.txt
 create mode 100644 main.c
 create mode 100644 replace.c
 create mode 100644 replace.h

diff --git a/input.txt b/input.txt
new file mode 100644
index 0000000..06eba69
--- /dev/null
+++ b/input.txt
@@ -0,0 +1,10 @@
+Normal text file
+
+%PLACEHOLDER%
+%PLACEHOLDER%
+%PLACEHOLDER%
+
+With lines and whatever, %PLACEHOLDER%
+
+123%PLACEHOLDER%123	
+ok %PLACEHOLDER% ok
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..8efc66c
--- /dev/null
+++ b/main.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include "replace.h"
+
+int
+main(void)
+{
+	int ret;
+	ret = replaceinfile("input.txt", "output.txt", "%PLACEHOLDER%", "replacement string");
+	if (ret == 0)
+		puts("failed");
+	return 0;
+}
diff --git a/replace.c b/replace.c
new file mode 100644
index 0000000..d9a0157
--- /dev/null
+++ b/replace.c
@@ -0,0 +1,90 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+size_t
+getfilelength(FILE *fp)
+{
+	/* 
+	 * return the number of bytes in file fp	
+    	 * value of 0 returned is empty or error
+	 * it doesn't matter for our purpose
+	 */
+	size_t retval;
+	if (!fp)
+		retval = 0;
+	else
+	{
+		fseek(fp, 0, SEEK_END);
+		retval = ftell(fp);
+		fseek(fp, 0, SEEK_SET);
+	}
+	return retval;
+}
+
+void
+appendchar(char *dest, char ch)
+{
+	int len = strlen(dest);
+	dest[len] = ch;
+	dest[len+1] = '\0';
+}
+
+int
+replaceinfile(char *originalfile, char *destinationfile, char *placeholder, char *replacement)
+{
+	/*
+	 * write originalfile into destinationfile replacing every instance 
+	 * of placeholder with replacement 
+	 */
+
+	/* open files */
+	FILE *template = fopen(originalfile, "r");
+	FILE *destination = fopen(destinationfile, "w");
+	if (!template)
+	{
+		fclose(destination);
+		return 0;
+	}
+	int ch;
+	char *substr;
+	size_t filesize = getfilelength(template);
+	char *filebuffer = malloc(filesize+1);
+	if (!filebuffer)
+		return 0;
+	fread(filebuffer, 1, filesize, template);
+	substr = strstr(filebuffer, placeholder);
+	for (size_t i = 0; i < strlen(filebuffer); i++)
+	{
+		if (i == (substr-filebuffer))
+		{
+			i += strlen(placeholder);
+			substr++;
+			substr = strstr(substr, placeholder);
+			printf("%s", replacement);
+			fprintf(destination, "%s", replacement);
+		}
+		ch = filebuffer[i];
+		putchar(ch);
+		fputc(ch, destination);
+	}
+	fclose(template);
+	fclose(destination);
+	free(filebuffer);
+	return 1;
+}
diff --git a/replace.h b/replace.h
new file mode 100644
index 0000000..8b0089c
--- /dev/null
+++ b/replace.h
@@ -0,0 +1,28 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef REPLACE_H
+#define REPLACE_H
+
+size_t
+getfilelength(FILE *fp);
+
+void
+appendchar(char *dest, char ch);
+
+int
+replaceinfile(char *originalfile, char *destinationfile, char *placeholder, char *replacement);
+
+#endif
-- 
cgit v1.2.3