TP3: Add merge sort implementation

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

diff --git a/TP3/Makefile b/TP3/Makefile
new file mode 100644 (file)
index 0000000..6a950a1
--- /dev/null
+++ b/TP3/Makefile
@@ -0,0 +1,79 @@
+# Sample Makefile to build simple project.
+#
+# This Makefile expect all source files (.c) to be at the same level, in the
+# current working directory.
+#
+# It will automatically generate dependencies, compile all files, and produce a
+# binary using the provided name.
+#
+# Set BINARY_NAME to the name of the binary file to build.
+# Set BUILD_TYPE to either debug or release
+#
+# Automatic dependencies code from:
+# http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/#tldr
+BINARY_NAME=tp3
+BUILD_TYPE=debug
+
+# ====================================
+# DO NOT CHANGE STUFF BEYOND THIS LINE
+# ====================================
+
+all: $(BINARY_NAME)
+
+CC=gcc
+LD=gcc
+
+WARN_FLAGS = -Wall -Wextra
+STD_FLAG = -std=c99
+
+ifeq ($(BUILD_TYPE),debug)
+BUILDDIR := .build/debug
+DEBUG_FLAG = -g
+STRIP_FLAG =
+OPTI_FLAG = -O0
+else
+BUILDDIR := .build/release
+DEBUG_FLAG =
+STRIP_FLAG = -s
+OPTIFLAG = -O3
+endif
+
+CFLAGS := $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG)
+LDFLAGS := $(LDFLAGS) $(STRIP_FLAG)
+
+OBJDIR := $(BUILDDIR)/objs
+$(shell mkdir -p $(OBJDIR))
+
+SRCS=$(wildcard *.c)
+OBJS=$(patsubst %.c,$(OBJDIR)/%.o,$(SRCS))
+
+DEPDIR := $(BUILDDIR)/deps
+$(shell mkdir -p $(DEPDIR))
+DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$*.Td
+POSTCOMPILE = mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d
+
+$(BINARY_NAME): $(OBJS)
+       @echo "[LD ] $@"
+       @$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
+
+$(OBJDIR)/%.o: %.c $(DEPDIR)/%.d
+       @echo "[C  ] $*"
+       @$(CC) $(DEPFLAGS) $(CFLAGS) -c $< -o $@
+       @$(POSTCOMPILE)
+
+$(DEPDIR)/%.d: ;
+
+.PRECIOUS: $(DEPDIR)/%.d
+
+include $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS))))
+
+clean:
+       @echo "[CLN]"
+       -@rm -r $(BUILDDIR)
+       -@rm $(BINARY_NAME)
+
+disassemble: $(BINARY_NAME)
+       objdump -d $< | less
+
+symbols: $(BINARY_NAME)
+       objdump -t $< | sort | less

diff --git a/TP3/tp3.c b/TP3/tp3.c
new file mode 100644 (file)
index 0000000..4caf275
--- /dev/null
+++ b/TP3/tp3.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void AfficheTab(int T[], int n) {
+    for (int i = 0; i < n; i++) {
+        printf("T[%d]=%d\n", i, T[i]);
+    }
+}
+
+void TriFusion(int T[], int n) {
+    int i = 0, j = 0, k = 0;
+    int* T1;
+    int* T2;
+
+    T1 = malloc(n/2*sizeof(int));
+    T2 = malloc((n - n/2)*sizeof(int));
+    
+    if (n > 1) {
+        for (int i = 0; i < n/2; i++) {
+            T1[i] = T[i];
+            T2[i] = T[i + n/2];
+        }
+    TriFusion(T1, n/2);
+    TriFusion(T2, n/2);
+    while (k < n/2 && j < n/2) {
+        if (T1[k] <= T2[j]) {
+            T[i] = T1[k];
+            i++;
+            k++;
+        } else {
+            T[i] = T2[j];
+            i++;
+            j++;
+        }
+    }
+    while (k < n/2) {
+        T[i] = T1[k];
+        i++;
+        k++;
+    }
+    while (j < n/2) {
+        T[i] = T2[j];
+        i++;
+        j++;
+    }
+    free(T1);
+    free(T2);
+    } 
+}
+
+int main() {
+    int T[] = {4, 2, 7, 3, 8, 1, 6, 5};
+    int tabSize = sizeof(T)/sizeof(T[0]);
+    
+    AfficheTab(T, tabSize);
+
+    TriFusion(T,tabSize); 
+
+    AfficheTab(T, tabSize);
+
+    return 0;
+}