From 55c96d623dbc0043203cbdaf4dad4192efdc8e65 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 16:15:11 -0500
Subject: [PATCH 01/18] implemented cksum

---
 src/cksum/Makefile |   5 +++++
 src/cksum/cksum    | Bin 0 -> 15800 bytes
 src/cksum/cksum.1  |   1 +
 src/cksum/cksum.c  |  26 ++++++++++++++++++++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 src/cksum/Makefile
 create mode 100755 src/cksum/cksum
 create mode 100644 src/cksum/cksum.1
 create mode 100644 src/cksum/cksum.c

diff --git a/src/cksum/Makefile b/src/cksum/Makefile
new file mode 100644
index 0000000..f84ebce
--- /dev/null
+++ b/src/cksum/Makefile
@@ -0,0 +1,5 @@
+OUT := cksum
+
+SRC := cksum.c
+
+include ../shared.mk
diff --git a/src/cksum/cksum b/src/cksum/cksum
new file mode 100755
index 0000000000000000000000000000000000000000..60f4b965d759eeaf9d16a4a0aa81533137b4beb3
GIT binary patch
literal 15800
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Q#r;=pFde>Naj>Z3UlnoI)&Kwi

literal 0
HcmV?d00001

diff --git a/src/cksum/cksum.1 b/src/cksum/cksum.1
new file mode 100644
index 0000000..fca0bf6
--- /dev/null
+++ b/src/cksum/cksum.1
@@ -0,0 +1 @@
+\" TODO
\ No newline at end of file
diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
new file mode 100644
index 0000000..79c4500
--- /dev/null
+++ b/src/cksum/cksum.c
@@ -0,0 +1,26 @@
+#include<stdint.h>
+#include<stdio.h>
+
+#define NAME "cksum (canoutils)"
+#define VERSION "0.0.1"
+#define AUTHOR "cospplredman"
+
+#include"../version_info.h"
+
+#define X(a,...) for(a)for(r=(r<<8)^(e&0xff)^__VA_ARGS__,e=0,i=31;i>23;i--)if(r&(1<<i))r^=(1<<i)|(q>>(32-i)),e^=q<<(i-24);
+
+uint32_t q=0x04c11db7,r,e;d,i=1,t,j,k,f=2;main(c,v)char**v;{
+	if(c<2)exit(1);
+	for(;++k<c;){
+		if(f&&(!strcmp(v[k], "--")|!strcmp(v[k], "-v"))){
+			if(v[k][1]=='-')f=0;
+			if(f==2){f=1;print_version();}
+			continue;
+		}
+		FILE*f=fopen(v[k],"r");
+		if(f==NULL)exit(1);
+		X(;(d=getc(f))>=0;t++,d)X(j=t;j;,(j&0xff),j>>=8)X(j=3;j--;,0)
+		if(printf("%u %d %s\n",~((r<<8)|(e&0xff)),t,v[k])<0)exit(1);
+		r=e=t=0;
+	}
+}

From 80d78b108177747d92bdab765aa9aaf87a91e050 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 17:50:36 -0500
Subject: [PATCH 02/18] re-implemented cksum

---
 src/cksum/cksum.c | 103 +++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 89 insertions(+), 14 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 79c4500..7a135d5 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -1,26 +1,101 @@
 #include<stdint.h>
 #include<stdio.h>
+#include<stdlib.h>
 
 #define NAME "cksum (canoutils)"
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include"../version_info.h"
+#include "../version_info.h"
+#include "../getopt.h"
 
-#define X(a,...) for(a)for(r=(r<<8)^(e&0xff)^__VA_ARGS__,e=0,i=31;i>23;i--)if(r&(1<<i))r^=(1<<i)|(q>>(32-i)),e^=q<<(i-24);
+static const char usage[] = {
+	"  -v   version information\n"
+};
 
-uint32_t q=0x04c11db7,r,e;d,i=1,t,j,k,f=2;main(c,v)char**v;{
-	if(c<2)exit(1);
-	for(;++k<c;){
-		if(f&&(!strcmp(v[k], "--")|!strcmp(v[k], "-v"))){
-			if(v[k][1]=='-')f=0;
-			if(f==2){f=1;print_version();}
-			continue;
+static const uint32_t crc32_ = 0x04c11db7;
+
+uint32_t crc32(FILE *file, size_t *octets){
+	uint32_t remainder = 0;
+	uint8_t difference = 0;
+
+	size_t length = 0;
+
+
+	/* calculate crc of file contents */
+	int cur_char;
+	while((cur_char = getc(file)) != EOF){
+		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+		difference = 0;
+		for(int i = 31; i > 23; i--){
+			if(remainder & (1 << i)){
+				remainder ^= (1 << i) | (crc32_ >> (32 - i));
+				difference ^= crc32_ << (i - 24);
+			}
+		}
+		length++;
+	}
+
+	*octets = length;
+
+	/* calculate crc of file contents + length of files in bytes */
+	while(length){
+		cur_char = (length & 0xff);
+		length >>= 8;
+
+		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+		difference = 0;
+		for(int i = 31; i > 23; i--){
+			if(remainder & (1 << i)){
+				remainder ^= (1 << i) | (crc32_ >> (32 - i));
+				difference ^= crc32_ << (i - 24);
+			}
+		}
+	}
+
+
+	/* work through the remaining 3 bytes  */
+	for(int j = 0; j < 3; j++){
+		remainder = (remainder << 8) ^ (difference & 0xff);
+		difference = 0;
+		for(int i = 31; i > 23; i--){
+			if(remainder & (1 << i)){
+				remainder ^= (1 << i) | (crc32_ >> (32 - i));
+				difference ^= crc32_ << (i - 24);
+			}
 		}
-		FILE*f=fopen(v[k],"r");
-		if(f==NULL)exit(1);
-		X(;(d=getc(f))>=0;t++,d)X(j=t;j;,(j&0xff),j>>=8)X(j=3;j--;,0)
-		if(printf("%u %d %s\n",~((r<<8)|(e&0xff)),t,v[k])<0)exit(1);
-		r=e=t=0;
+	}
+
+	return ~((remainder<<8)|(difference&0xff));
+	
+}
+
+int main(int argc, char ** argv) {
+	if(argc<2){
+		printf("%s\n", usage);
+		exit(1);
+	}
+
+	int opt;
+	while((opt = getopt(argc, argv, "v")) != -1){
+		switch(opt){
+			case 'v':
+				print_version();
+				return EXIT_SUCCESS;
+			break;
+		}
+	}
+
+	int index = optind;
+	for(;index < argc; index++){
+		FILE*file=fopen(argv[index],"r");
+
+		if(file==NULL)
+			return EXIT_FAILURE;
+
+		size_t octets;
+		uint32_t crc = crc32(file, &octets);
+
+		printf("%u %lu %s\n", crc, octets, argv[index]);
 	}
 }

From 9c39b39a0e7771099a769d2ff2d41f4de8dff9f2 Mon Sep 17 00:00:00 2001
From: cospplredman <62368514+cospplredman@users.noreply.github.com>
Date: Sun, 21 Apr 2024 18:21:47 -0500
Subject: [PATCH 03/18] Delete src/cksum/cksum

bro i swear i did git rm
---
 src/cksum/cksum | Bin 15800 -> 0 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100755 src/cksum/cksum

diff --git a/src/cksum/cksum b/src/cksum/cksum
deleted file mode 100755
index 60f4b965d759eeaf9d16a4a0aa81533137b4beb3..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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From 815a831571c5601fd7523888e93f262f72eb0d8d Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 18:35:01 -0500
Subject: [PATCH 04/18] formatting fix

---
 src/cksum/cksum.c | 172 ++++++++++++++++++++++------------------------
 1 file changed, 84 insertions(+), 88 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 7a135d5..3014c8e 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -1,101 +1,97 @@
-#include<stdint.h>
-#include<stdio.h>
-#include<stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 #define NAME "cksum (canoutils)"
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include "../version_info.h"
 #include "../getopt.h"
+#include "../version_info.h"
 
-static const char usage[] = {
-	"  -v   version information\n"
-};
+static const char usage[] = {"  -v   version information\n"};
 
 static const uint32_t crc32_ = 0x04c11db7;
 
-uint32_t crc32(FILE *file, size_t *octets){
-	uint32_t remainder = 0;
-	uint8_t difference = 0;
-
-	size_t length = 0;
-
-
-	/* calculate crc of file contents */
-	int cur_char;
-	while((cur_char = getc(file)) != EOF){
-		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
-		difference = 0;
-		for(int i = 31; i > 23; i--){
-			if(remainder & (1 << i)){
-				remainder ^= (1 << i) | (crc32_ >> (32 - i));
-				difference ^= crc32_ << (i - 24);
-			}
-		}
-		length++;
-	}
-
-	*octets = length;
-
-	/* calculate crc of file contents + length of files in bytes */
-	while(length){
-		cur_char = (length & 0xff);
-		length >>= 8;
-
-		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
-		difference = 0;
-		for(int i = 31; i > 23; i--){
-			if(remainder & (1 << i)){
-				remainder ^= (1 << i) | (crc32_ >> (32 - i));
-				difference ^= crc32_ << (i - 24);
-			}
-		}
-	}
-
-
-	/* work through the remaining 3 bytes  */
-	for(int j = 0; j < 3; j++){
-		remainder = (remainder << 8) ^ (difference & 0xff);
-		difference = 0;
-		for(int i = 31; i > 23; i--){
-			if(remainder & (1 << i)){
-				remainder ^= (1 << i) | (crc32_ >> (32 - i));
-				difference ^= crc32_ << (i - 24);
-			}
-		}
-	}
-
-	return ~((remainder<<8)|(difference&0xff));
-	
+uint32_t crc32(FILE *file, size_t *octets) {
+  uint32_t remainder = 0;
+  uint8_t difference = 0;
+
+  size_t length = 0;
+
+  /* calculate crc of file contents */
+  int cur_char;
+  while ((cur_char = getc(file)) != EOF) {
+    remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+    difference = 0;
+    for (int i = 31; i > 23; i--) {
+      if (remainder & (1 << i)) {
+        remainder ^= (1 << i) | (crc32_ >> (32 - i));
+        difference ^= crc32_ << (i - 24);
+      }
+    }
+    length++;
+  }
+
+  *octets = length;
+
+  /* calculate crc of file contents + length of files in bytes */
+  while (length) {
+    cur_char = (length & 0xff);
+    length >>= 8;
+
+    remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+    difference = 0;
+    for (int i = 31; i > 23; i--) {
+      if (remainder & (1 << i)) {
+        remainder ^= (1 << i) | (crc32_ >> (32 - i));
+        difference ^= crc32_ << (i - 24);
+      }
+    }
+  }
+
+  /* work through the remaining 3 bytes  */
+  for (int j = 0; j < 3; j++) {
+    remainder = (remainder << 8) ^ (difference & 0xff);
+    difference = 0;
+    for (int i = 31; i > 23; i--) {
+      if (remainder & (1 << i)) {
+        remainder ^= (1 << i) | (crc32_ >> (32 - i));
+        difference ^= crc32_ << (i - 24);
+      }
+    }
+  }
+
+  return ~((remainder << 8) | (difference & 0xff));
 }
 
-int main(int argc, char ** argv) {
-	if(argc<2){
-		printf("%s\n", usage);
-		exit(1);
-	}
-
-	int opt;
-	while((opt = getopt(argc, argv, "v")) != -1){
-		switch(opt){
-			case 'v':
-				print_version();
-				return EXIT_SUCCESS;
-			break;
-		}
-	}
-
-	int index = optind;
-	for(;index < argc; index++){
-		FILE*file=fopen(argv[index],"r");
-
-		if(file==NULL)
-			return EXIT_FAILURE;
-
-		size_t octets;
-		uint32_t crc = crc32(file, &octets);
-
-		printf("%u %lu %s\n", crc, octets, argv[index]);
-	}
+int main(int argc, char **argv) {
+  if (argc < 2) {
+    printf("%s\n", usage);
+    exit(1);
+  }
+
+  int opt;
+  while ((opt = getopt(argc, argv, "v")) != -1) {
+    switch (opt) {
+    case 'v':
+      print_version();
+      return EXIT_SUCCESS;
+      break;
+    }
+  }
+
+  int index = optind;
+  for (; index < argc; index++) {
+    FILE *file = fopen(argv[index], "r");
+
+    if (file == NULL)
+      return EXIT_FAILURE;
+
+    size_t octets;
+    uint32_t crc = crc32(file, &octets);
+    fclose(file);
+
+    printf("%u %lu %s\n", crc, octets, argv[index]);
+  }
 }

From 01ec9b945b8f7b4a7dd5d6a87d349da214e46208 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 18:50:58 -0500
Subject: [PATCH 05/18] updated makefile

---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index 983cbfe..98f764e 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,7 @@ BINS += mv
 BINS += chmod
 BINS += sh
 BINS += sleep
+BINS += cksum
 
 BINARIES := $(foreach b, $(BINS), src/$b/$b)
 BINS-COPY := $(foreach b, $(BINS), bin/$b)

From 1f1b0b36a24e8838c3539e6c09f8da4c52a0b2ac Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 19:57:19 -0500
Subject: [PATCH 06/18] updated include paths

---
 src/cksum/cksum.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 3014c8e..f3f1333 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -6,8 +6,8 @@
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include "../getopt.h"
-#include "../version_info.h"
+#include "getopt.h"
+#include "version_info.h"
 
 static const char usage[] = {"  -v   version information\n"};
 

From cb008b31e70772e2bda229f426f3a1cf26af20ce Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 16:15:11 -0500
Subject: [PATCH 07/18] implemented cksum

---
 src/cksum/Makefile |   5 +++++
 src/cksum/cksum    | Bin 0 -> 15800 bytes
 src/cksum/cksum.1  |   1 +
 src/cksum/cksum.c  |  26 ++++++++++++++++++++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 src/cksum/Makefile
 create mode 100755 src/cksum/cksum
 create mode 100644 src/cksum/cksum.1
 create mode 100644 src/cksum/cksum.c

diff --git a/src/cksum/Makefile b/src/cksum/Makefile
new file mode 100644
index 0000000..f84ebce
--- /dev/null
+++ b/src/cksum/Makefile
@@ -0,0 +1,5 @@
+OUT := cksum
+
+SRC := cksum.c
+
+include ../shared.mk
diff --git a/src/cksum/cksum b/src/cksum/cksum
new file mode 100755
index 0000000000000000000000000000000000000000..60f4b965d759eeaf9d16a4a0aa81533137b4beb3
GIT binary patch
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literal 0
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diff --git a/src/cksum/cksum.1 b/src/cksum/cksum.1
new file mode 100644
index 0000000..fca0bf6
--- /dev/null
+++ b/src/cksum/cksum.1
@@ -0,0 +1 @@
+\" TODO
\ No newline at end of file
diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
new file mode 100644
index 0000000..79c4500
--- /dev/null
+++ b/src/cksum/cksum.c
@@ -0,0 +1,26 @@
+#include<stdint.h>
+#include<stdio.h>
+
+#define NAME "cksum (canoutils)"
+#define VERSION "0.0.1"
+#define AUTHOR "cospplredman"
+
+#include"../version_info.h"
+
+#define X(a,...) for(a)for(r=(r<<8)^(e&0xff)^__VA_ARGS__,e=0,i=31;i>23;i--)if(r&(1<<i))r^=(1<<i)|(q>>(32-i)),e^=q<<(i-24);
+
+uint32_t q=0x04c11db7,r,e;d,i=1,t,j,k,f=2;main(c,v)char**v;{
+	if(c<2)exit(1);
+	for(;++k<c;){
+		if(f&&(!strcmp(v[k], "--")|!strcmp(v[k], "-v"))){
+			if(v[k][1]=='-')f=0;
+			if(f==2){f=1;print_version();}
+			continue;
+		}
+		FILE*f=fopen(v[k],"r");
+		if(f==NULL)exit(1);
+		X(;(d=getc(f))>=0;t++,d)X(j=t;j;,(j&0xff),j>>=8)X(j=3;j--;,0)
+		if(printf("%u %d %s\n",~((r<<8)|(e&0xff)),t,v[k])<0)exit(1);
+		r=e=t=0;
+	}
+}

From e008a9311a2f781578e66ec79dc4bd6e2b1f814c Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 17:50:36 -0500
Subject: [PATCH 08/18] re-implemented cksum

---
 src/cksum/cksum.c | 103 +++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 89 insertions(+), 14 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 79c4500..7a135d5 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -1,26 +1,101 @@
 #include<stdint.h>
 #include<stdio.h>
+#include<stdlib.h>
 
 #define NAME "cksum (canoutils)"
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include"../version_info.h"
+#include "../version_info.h"
+#include "../getopt.h"
 
-#define X(a,...) for(a)for(r=(r<<8)^(e&0xff)^__VA_ARGS__,e=0,i=31;i>23;i--)if(r&(1<<i))r^=(1<<i)|(q>>(32-i)),e^=q<<(i-24);
+static const char usage[] = {
+	"  -v   version information\n"
+};
 
-uint32_t q=0x04c11db7,r,e;d,i=1,t,j,k,f=2;main(c,v)char**v;{
-	if(c<2)exit(1);
-	for(;++k<c;){
-		if(f&&(!strcmp(v[k], "--")|!strcmp(v[k], "-v"))){
-			if(v[k][1]=='-')f=0;
-			if(f==2){f=1;print_version();}
-			continue;
+static const uint32_t crc32_ = 0x04c11db7;
+
+uint32_t crc32(FILE *file, size_t *octets){
+	uint32_t remainder = 0;
+	uint8_t difference = 0;
+
+	size_t length = 0;
+
+
+	/* calculate crc of file contents */
+	int cur_char;
+	while((cur_char = getc(file)) != EOF){
+		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+		difference = 0;
+		for(int i = 31; i > 23; i--){
+			if(remainder & (1 << i)){
+				remainder ^= (1 << i) | (crc32_ >> (32 - i));
+				difference ^= crc32_ << (i - 24);
+			}
+		}
+		length++;
+	}
+
+	*octets = length;
+
+	/* calculate crc of file contents + length of files in bytes */
+	while(length){
+		cur_char = (length & 0xff);
+		length >>= 8;
+
+		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+		difference = 0;
+		for(int i = 31; i > 23; i--){
+			if(remainder & (1 << i)){
+				remainder ^= (1 << i) | (crc32_ >> (32 - i));
+				difference ^= crc32_ << (i - 24);
+			}
+		}
+	}
+
+
+	/* work through the remaining 3 bytes  */
+	for(int j = 0; j < 3; j++){
+		remainder = (remainder << 8) ^ (difference & 0xff);
+		difference = 0;
+		for(int i = 31; i > 23; i--){
+			if(remainder & (1 << i)){
+				remainder ^= (1 << i) | (crc32_ >> (32 - i));
+				difference ^= crc32_ << (i - 24);
+			}
 		}
-		FILE*f=fopen(v[k],"r");
-		if(f==NULL)exit(1);
-		X(;(d=getc(f))>=0;t++,d)X(j=t;j;,(j&0xff),j>>=8)X(j=3;j--;,0)
-		if(printf("%u %d %s\n",~((r<<8)|(e&0xff)),t,v[k])<0)exit(1);
-		r=e=t=0;
+	}
+
+	return ~((remainder<<8)|(difference&0xff));
+	
+}
+
+int main(int argc, char ** argv) {
+	if(argc<2){
+		printf("%s\n", usage);
+		exit(1);
+	}
+
+	int opt;
+	while((opt = getopt(argc, argv, "v")) != -1){
+		switch(opt){
+			case 'v':
+				print_version();
+				return EXIT_SUCCESS;
+			break;
+		}
+	}
+
+	int index = optind;
+	for(;index < argc; index++){
+		FILE*file=fopen(argv[index],"r");
+
+		if(file==NULL)
+			return EXIT_FAILURE;
+
+		size_t octets;
+		uint32_t crc = crc32(file, &octets);
+
+		printf("%u %lu %s\n", crc, octets, argv[index]);
 	}
 }

From 7217e109c807bdaae8137e224fb4c922c6744a09 Mon Sep 17 00:00:00 2001
From: cospplredman <62368514+cospplredman@users.noreply.github.com>
Date: Sun, 21 Apr 2024 18:21:47 -0500
Subject: [PATCH 09/18] Delete src/cksum/cksum

bro i swear i did git rm
---
 src/cksum/cksum | Bin 15800 -> 0 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100755 src/cksum/cksum

diff --git a/src/cksum/cksum b/src/cksum/cksum
deleted file mode 100755
index 60f4b965d759eeaf9d16a4a0aa81533137b4beb3..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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From bc172e1c311b14c923f6cef5def1d187fa732c68 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 18:35:01 -0500
Subject: [PATCH 10/18] formatting fix

---
 src/cksum/cksum.c | 172 ++++++++++++++++++++++------------------------
 1 file changed, 84 insertions(+), 88 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 7a135d5..3014c8e 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -1,101 +1,97 @@
-#include<stdint.h>
-#include<stdio.h>
-#include<stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 #define NAME "cksum (canoutils)"
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include "../version_info.h"
 #include "../getopt.h"
+#include "../version_info.h"
 
-static const char usage[] = {
-	"  -v   version information\n"
-};
+static const char usage[] = {"  -v   version information\n"};
 
 static const uint32_t crc32_ = 0x04c11db7;
 
-uint32_t crc32(FILE *file, size_t *octets){
-	uint32_t remainder = 0;
-	uint8_t difference = 0;
-
-	size_t length = 0;
-
-
-	/* calculate crc of file contents */
-	int cur_char;
-	while((cur_char = getc(file)) != EOF){
-		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
-		difference = 0;
-		for(int i = 31; i > 23; i--){
-			if(remainder & (1 << i)){
-				remainder ^= (1 << i) | (crc32_ >> (32 - i));
-				difference ^= crc32_ << (i - 24);
-			}
-		}
-		length++;
-	}
-
-	*octets = length;
-
-	/* calculate crc of file contents + length of files in bytes */
-	while(length){
-		cur_char = (length & 0xff);
-		length >>= 8;
-
-		remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
-		difference = 0;
-		for(int i = 31; i > 23; i--){
-			if(remainder & (1 << i)){
-				remainder ^= (1 << i) | (crc32_ >> (32 - i));
-				difference ^= crc32_ << (i - 24);
-			}
-		}
-	}
-
-
-	/* work through the remaining 3 bytes  */
-	for(int j = 0; j < 3; j++){
-		remainder = (remainder << 8) ^ (difference & 0xff);
-		difference = 0;
-		for(int i = 31; i > 23; i--){
-			if(remainder & (1 << i)){
-				remainder ^= (1 << i) | (crc32_ >> (32 - i));
-				difference ^= crc32_ << (i - 24);
-			}
-		}
-	}
-
-	return ~((remainder<<8)|(difference&0xff));
-	
+uint32_t crc32(FILE *file, size_t *octets) {
+  uint32_t remainder = 0;
+  uint8_t difference = 0;
+
+  size_t length = 0;
+
+  /* calculate crc of file contents */
+  int cur_char;
+  while ((cur_char = getc(file)) != EOF) {
+    remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+    difference = 0;
+    for (int i = 31; i > 23; i--) {
+      if (remainder & (1 << i)) {
+        remainder ^= (1 << i) | (crc32_ >> (32 - i));
+        difference ^= crc32_ << (i - 24);
+      }
+    }
+    length++;
+  }
+
+  *octets = length;
+
+  /* calculate crc of file contents + length of files in bytes */
+  while (length) {
+    cur_char = (length & 0xff);
+    length >>= 8;
+
+    remainder = (remainder << 8) ^ (difference & 0xff) ^ cur_char;
+    difference = 0;
+    for (int i = 31; i > 23; i--) {
+      if (remainder & (1 << i)) {
+        remainder ^= (1 << i) | (crc32_ >> (32 - i));
+        difference ^= crc32_ << (i - 24);
+      }
+    }
+  }
+
+  /* work through the remaining 3 bytes  */
+  for (int j = 0; j < 3; j++) {
+    remainder = (remainder << 8) ^ (difference & 0xff);
+    difference = 0;
+    for (int i = 31; i > 23; i--) {
+      if (remainder & (1 << i)) {
+        remainder ^= (1 << i) | (crc32_ >> (32 - i));
+        difference ^= crc32_ << (i - 24);
+      }
+    }
+  }
+
+  return ~((remainder << 8) | (difference & 0xff));
 }
 
-int main(int argc, char ** argv) {
-	if(argc<2){
-		printf("%s\n", usage);
-		exit(1);
-	}
-
-	int opt;
-	while((opt = getopt(argc, argv, "v")) != -1){
-		switch(opt){
-			case 'v':
-				print_version();
-				return EXIT_SUCCESS;
-			break;
-		}
-	}
-
-	int index = optind;
-	for(;index < argc; index++){
-		FILE*file=fopen(argv[index],"r");
-
-		if(file==NULL)
-			return EXIT_FAILURE;
-
-		size_t octets;
-		uint32_t crc = crc32(file, &octets);
-
-		printf("%u %lu %s\n", crc, octets, argv[index]);
-	}
+int main(int argc, char **argv) {
+  if (argc < 2) {
+    printf("%s\n", usage);
+    exit(1);
+  }
+
+  int opt;
+  while ((opt = getopt(argc, argv, "v")) != -1) {
+    switch (opt) {
+    case 'v':
+      print_version();
+      return EXIT_SUCCESS;
+      break;
+    }
+  }
+
+  int index = optind;
+  for (; index < argc; index++) {
+    FILE *file = fopen(argv[index], "r");
+
+    if (file == NULL)
+      return EXIT_FAILURE;
+
+    size_t octets;
+    uint32_t crc = crc32(file, &octets);
+    fclose(file);
+
+    printf("%u %lu %s\n", crc, octets, argv[index]);
+  }
 }

From b078275193aebb105425464a895843c98f87b200 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 18:50:58 -0500
Subject: [PATCH 11/18] updated makefile

---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index 983cbfe..98f764e 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,7 @@ BINS += mv
 BINS += chmod
 BINS += sh
 BINS += sleep
+BINS += cksum
 
 BINARIES := $(foreach b, $(BINS), src/$b/$b)
 BINS-COPY := $(foreach b, $(BINS), bin/$b)

From 0c1afeb9fa406e0cda7def8f54143ab015f3b395 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Sun, 21 Apr 2024 19:57:19 -0500
Subject: [PATCH 12/18] updated include paths

---
 src/cksum/cksum.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 3014c8e..f3f1333 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -6,8 +6,8 @@
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include "../getopt.h"
-#include "../version_info.h"
+#include "getopt.h"
+#include "version_info.h"
 
 static const char usage[] = {"  -v   version information\n"};
 

From 62048505b38bf9e2d8ea6dc87d818d1238f3e14d Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Tue, 23 Apr 2024 08:22:51 -0500
Subject: [PATCH 13/18] added flags to cksum

---
 .gitignore        |  1 +
 src/cksum/cksum.c | 81 ++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 67 insertions(+), 15 deletions(-)

diff --git a/.gitignore b/.gitignore
index ca890b5..1e0675a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -76,6 +76,7 @@ src/rm/rm
 src/rmdir/rmdir
 src/sh/sh
 src/sleep/sleep
+src/sleep/cksum
 
 bin/
 
diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index f3f1333..4c6f8bb 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -1,15 +1,34 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
+#include <string.h>
 
 #define NAME "cksum (canoutils)"
 #define VERSION "0.0.1"
 #define AUTHOR "cospplredman"
 
-#include "getopt.h"
+#include "cgetopt.h"
 #include "version_info.h"
 
-static const char usage[] = {"  -v   version information\n"};
+static const char usage[] = {
+	"Usage: cksum [Option]... [File]...\n"
+	"  --version   version information\n"
+	"  --help      display this help and exit\n"
+	"  --raw       output raw crc\n"
+	"  --tag       default output style\n"
+};
+
+//flags
+static int output_format = 't';
+
+static struct option long_options[] = {
+	{"version", no_argument, NULL, 'v'},
+	{"help", no_argument, NULL, 'h'},
+	{"raw", no_argument, NULL, 'r'},
+	{"tag", no_argument, NULL, 't'},
+};
+
 
 static const uint32_t crc32_ = 0x04c11db7;
 
@@ -65,33 +84,65 @@ uint32_t crc32(FILE *file, size_t *octets) {
   return ~((remainder << 8) | (difference & 0xff));
 }
 
-int main(int argc, char **argv) {
-  if (argc < 2) {
-    printf("%s\n", usage);
-    exit(1);
+void crc_print(char *filename, uint32_t crc, size_t octets){
+  printf("%c\n", output_format);
+  switch(output_format){
+    case 't':
+      if(filename == NULL)
+        printf("%u %lu\n", crc, octets);
+      else
+        printf("%u %lu %s\n", crc, octets, filename);
+      break;
+    case 'r':
+      printf("%c%c%c%c", (crc >> 24) & 255, (crc >> 16) & 255, (crc >> 8) & 255, crc & 255);
+      break;
   }
+}
 
-  int opt;
-  while ((opt = getopt(argc, argv, "v")) != -1) {
+int main(int argc, char **argv) {
+
+  int opt, option_index;
+  while ((opt = getopt_long(argc, argv, "", long_options, &option_index)) != -1) {
     switch (opt) {
+    case 0:
+      break;
     case 'v':
       print_version();
       return EXIT_SUCCESS;
       break;
+    case 'h':
+      printf("%s\n", usage);
+      return EXIT_SUCCESS;
+    case 'r':
+      output_format = 'r';
+      break;
+    case 't':
+      output_format = 't';
+      break;
     }
   }
 
   int index = optind;
+  size_t octets;
+  uint32_t crc;
+
+  if (argc < 2) {
+    crc = crc32(stdin, &octets);
+    crc_print(NULL, crc, octets);
+    return EXIT_SUCCESS;
+  }
+
   for (; index < argc; index++) {
-    FILE *file = fopen(argv[index], "r");
+    FILE *file = fopen(argv[index], "r+");
 
-    if (file == NULL)
-      return EXIT_FAILURE;
+    if (file == NULL){
+      fprintf(stderr, "cksum: %s: %s\n", argv[index], strerror(errno));
+      continue;
+    }
 
-    size_t octets;
-    uint32_t crc = crc32(file, &octets);
-    fclose(file);
+    crc = crc32(file, &octets);
+    crc_print(argv[index], crc, octets);
 
-    printf("%u %lu %s\n", crc, octets, argv[index]);
+    fclose(file);
   }
 }

From e5951dbf2f24968e4cd6e262a9b7d965b8ebd088 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Tue, 23 Apr 2024 08:23:28 -0500
Subject: [PATCH 14/18] fixed typo

---
 .gitignore | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 1e0675a..de81bf8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -76,7 +76,7 @@ src/rm/rm
 src/rmdir/rmdir
 src/sh/sh
 src/sleep/sleep
-src/sleep/cksum
+src/cksum/cksum
 
 bin/
 

From 01ce6211af445bdcb3a9468931d14f9bf4128864 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Tue, 23 Apr 2024 14:01:21 -0500
Subject: [PATCH 15/18] formatting fix

---
 src/cksum/cksum.c | 53 +++++++++++++++++++++++------------------------
 1 file changed, 26 insertions(+), 27 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 4c6f8bb..13ce0de 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -1,7 +1,7 @@
+#include <errno.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <errno.h>
 #include <string.h>
 
 #define NAME "cksum (canoutils)"
@@ -11,25 +11,22 @@
 #include "cgetopt.h"
 #include "version_info.h"
 
-static const char usage[] = {
-	"Usage: cksum [Option]... [File]...\n"
-	"  --version   version information\n"
-	"  --help      display this help and exit\n"
-	"  --raw       output raw crc\n"
-	"  --tag       default output style\n"
-};
+static const char usage[] = {"Usage: cksum [Option]... [File]...\n"
+                             "  --version   version information\n"
+                             "  --help      display this help and exit\n"
+                             "  --raw       output raw crc\n"
+                             "  --tag       default output style\n"};
 
-//flags
+// flags
 static int output_format = 't';
 
 static struct option long_options[] = {
-	{"version", no_argument, NULL, 'v'},
-	{"help", no_argument, NULL, 'h'},
-	{"raw", no_argument, NULL, 'r'},
-	{"tag", no_argument, NULL, 't'},
+    {"version", no_argument, NULL, 'v'},
+    {"help", no_argument, NULL, 'h'},
+    {"raw", no_argument, NULL, 'r'},
+    {"tag", no_argument, NULL, 't'},
 };
 
-
 static const uint32_t crc32_ = 0x04c11db7;
 
 uint32_t crc32(FILE *file, size_t *octets) {
@@ -84,25 +81,27 @@ uint32_t crc32(FILE *file, size_t *octets) {
   return ~((remainder << 8) | (difference & 0xff));
 }
 
-void crc_print(char *filename, uint32_t crc, size_t octets){
+void crc_print(char *filename, uint32_t crc, size_t octets) {
   printf("%c\n", output_format);
-  switch(output_format){
-    case 't':
-      if(filename == NULL)
-        printf("%u %lu\n", crc, octets);
-      else
-        printf("%u %lu %s\n", crc, octets, filename);
-      break;
-    case 'r':
-      printf("%c%c%c%c", (crc >> 24) & 255, (crc >> 16) & 255, (crc >> 8) & 255, crc & 255);
-      break;
+  switch (output_format) {
+  case 't':
+    if (filename == NULL)
+      printf("%u %lu\n", crc, octets);
+    else
+      printf("%u %lu %s\n", crc, octets, filename);
+    break;
+  case 'r':
+    printf("%c%c%c%c", (crc >> 24) & 255, (crc >> 16) & 255, (crc >> 8) & 255,
+           crc & 255);
+    break;
   }
 }
 
 int main(int argc, char **argv) {
 
   int opt, option_index;
-  while ((opt = getopt_long(argc, argv, "", long_options, &option_index)) != -1) {
+  while ((opt = getopt_long(argc, argv, "", long_options, &option_index)) !=
+         -1) {
     switch (opt) {
     case 0:
       break;
@@ -135,7 +134,7 @@ int main(int argc, char **argv) {
   for (; index < argc; index++) {
     FILE *file = fopen(argv[index], "r+");
 
-    if (file == NULL){
+    if (file == NULL) {
       fprintf(stderr, "cksum: %s: %s\n", argv[index], strerror(errno));
       continue;
     }

From 6d604950a82ca45fbed34b733b9ea847c89e6a78 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Tue, 23 Apr 2024 18:48:23 -0500
Subject: [PATCH 16/18] conformed to proh14 coding style

---
 src/cksum/cksum.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index 13ce0de..a21f96e 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -82,7 +82,6 @@ uint32_t crc32(FILE *file, size_t *octets) {
 }
 
 void crc_print(char *filename, uint32_t crc, size_t octets) {
-  printf("%c\n", output_format);
   switch (output_format) {
   case 't':
     if (filename == NULL)
@@ -121,11 +120,14 @@ int main(int argc, char **argv) {
     }
   }
 
-  int index = optind;
+  argc -= optind;
+  argv += optind;
+
+  int index = 0;
   size_t octets;
   uint32_t crc;
 
-  if (argc < 2) {
+  if (argc < 1) {
     crc = crc32(stdin, &octets);
     crc_print(NULL, crc, octets);
     return EXIT_SUCCESS;

From 9a8541aa267adcaae6a5871453c9833642c02197 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Tue, 23 Apr 2024 19:00:09 -0500
Subject: [PATCH 17/18] added cksum to utils.txt

---
 utils.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/utils.txt b/utils.txt
index 2961c53..95719e4 100644
--- a/utils.txt
+++ b/utils.txt
@@ -22,3 +22,4 @@ pwd
 rm
 rmdir
 sleep
+cksum

From c18649c07cdee74c7a9e45c9753548a41e6cf6c4 Mon Sep 17 00:00:00 2001
From: cospplredman <cospplredman@gmail.com>
Date: Tue, 23 Apr 2024 19:00:24 -0500
Subject: [PATCH 18/18] static correctness

---
 src/cksum/cksum.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cksum/cksum.c b/src/cksum/cksum.c
index a21f96e..a683940 100644
--- a/src/cksum/cksum.c
+++ b/src/cksum/cksum.c
@@ -29,7 +29,7 @@ static struct option long_options[] = {
 
 static const uint32_t crc32_ = 0x04c11db7;
 
-uint32_t crc32(FILE *file, size_t *octets) {
+static uint32_t crc32(FILE *file, size_t *octets) {
   uint32_t remainder = 0;
   uint8_t difference = 0;
 
@@ -81,7 +81,7 @@ uint32_t crc32(FILE *file, size_t *octets) {
   return ~((remainder << 8) | (difference & 0xff));
 }
 
-void crc_print(char *filename, uint32_t crc, size_t octets) {
+static void crc_print(char *filename, uint32_t crc, size_t octets) {
   switch (output_format) {
   case 't':
     if (filename == NULL)