From: Rafał Długołęcki <rafal@dlugolecki.net.pl>
Date: Mon, 16 Jun 2014 21:42:53 +0000 (+0200)
Subject: Created first program.
X-Git-Url: https://git.dlugolecki.net.pl/?a=commitdiff_plain;h=fe306b90adcee352d3da4ba0842afac66ba3d751;p=wsti_so.git

Created first program.
---

diff --git a/Makefile.am b/Makefile.am
index 43d8866..35b3782 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,9 +1,8 @@
 AUTOMAKE_OPTIONS = gnu subdir-objects
 ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS}
 
-bin_PROGRAMS = bin/signals
-
-bin_signals_SOURCES = \
-	src/main.c
-
+bin_PROGRAMS = \
+	bin/process1
 
+bin_process1_SOURCES = \
+	src/process1.c
diff --git a/configure.ac b/configure.ac
index de44136..9b86d53 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,3 +6,5 @@ AC_CONFIG_HEADERS([config.h])
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_CONFIG_FILES([Makefile])
+
+AC_OUTPUT
\ No newline at end of file
diff --git a/src/process1.c b/src/process1.c
new file mode 100644
index 0000000..695e887
--- /dev/null
+++ b/src/process1.c
@@ -0,0 +1,89 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/** If buffer is too small to hold entire string, it is incremented by this value */
+#define BUFFER_STEP 16
+
+/**
+ * Program reads entire lines of text from the standard input and returns them
+ * on the standard output without changing anything.
+ */
+int main(void) {
+	/** Currently fetched from stdin character */
+	int c;
+
+	/** Buffer used to store line of characters */
+	char * buffer = NULL;
+
+	/** Current buffer length*/
+	int buffer_length = 0;
+
+	/* Index of the current character */
+	int i = 0;
+	
+	/** Temporary buffer used as a proxy between
+	 * checking memory allocation and copying data to real buffer 
+	 */
+	char *tmp = NULL;
+
+	do {
+		c = fgetc(stdin);
+
+		/*
+		 * Check if current index is bigger than current buffer size.
+		 * If so increment buffer size. On error release memory, and set
+		 * appropriate flags.
+		 */
+		if (i >= buffer_length) {
+			tmp = NULL;
+			buffer_length += BUFFER_STEP;
+			tmp = (char*) realloc(buffer, buffer_length);
+			if (tmp == NULL) {
+				fprintf(stderr, "[%s] Memory allocation problem on read!\n", "process1");
+				free(buffer);
+				buffer = NULL;
+				c = EOF;
+			}
+		}
+
+		/*
+		 * If there were no errors parse data.
+		 */
+		if (c != EOF) {
+			/* If newline has been found
+			 * return entire string and release the memory
+			 */
+			if (c == 10) {
+				fprintf(stdout, "%s\n", buffer);
+
+				buffer_length = 0;
+				i = 0;
+
+				free(buffer);
+				buffer = NULL;
+				tmp = NULL;
+			}
+			/*
+			 * Normal character, add it to the buffer
+			 */
+			else {
+				buffer = tmp;
+				buffer[i] = c;
+
+				/* Used for debug..*/
+				/*
+				printf("c: %c/%d, i: %d, bl: %d\n", c, c, i, buffer_length);
+				*/
+				i++;
+			}
+		}
+	} while(c != EOF);
+	
+	if (buffer) {
+		free(buffer);
+		buffer = NULL;
+	}
+
+	return 0;
+}
\ No newline at end of file