Erstes Beispiel für die Benutzung von zlib

7 files changed, 173 insertions, 0 deletions

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..21efcac
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,45 @@
+---
+AccessModifierOffset: -4
+AlignConsecutiveAssignments: 'true'
+AlignConsecutiveDeclarations: 'true'
+AlignEscapedNewlines: Left
+AlignTrailingComments: 'true'
+AlwaysBreakAfterReturnType: TopLevelDefinitions
+BreakBeforeBraces: Stroustrup
+BreakConstructorInitializers: BeforeComma
+BreakInheritanceList: BeforeComma
+ColumnLimit: '0'
+CompactNamespaces: 'false'
+Cpp11BracedListStyle: 'false'
+FixNamespaceComments: 'true'
+IncludeBlocks: Regroup
+IncludeCategories:
+    - Regex: '^.*(precomp|pch|stdafx)'
+      Priority: -1
+    - Regex: '^<.*>'
+      Priority: 1
+    - Regex: '^".*"'
+      Priority: 2
+    - Regex: '.*'
+      Priority: 3
+IndentCaseLabels: 'false'
+IndentPPDirectives: AfterHash
+IndentWidth: '4'
+IndentWrappedFunctionNames: 'false'
+KeepEmptyLinesAtTheStartOfBlocks: 'false'
+PointerAlignment: Right
+SortIncludes: 'true'
+SpaceAfterCStyleCast: 'true'
+SpaceAfterTemplateKeyword: 'false'
+SpaceBeforeAssignmentOperators: 'true'
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: 'false'
+SpaceInEmptyParentheses: 'false'
+SpacesInAngles: 'false'
+SpacesInCStyleCastParentheses: 'false'
+SpacesInConditionalStatement: 'true'
+SpacesInParentheses: 'false'
+Standard: Auto
+TabWidth: '4'
+UseTab: ForIndentation
+...
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..0bceb5b
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,19 @@
+---
+Checks: "*,
+        -abseil-*,
+        -altera-*,
+        -android-*,
+        -fuchsia-*,
+        -google-*,
+        -llvm*,
+        -modernize-use-trailing-return-type,
+        -zircon-*,
+        -readability-else-after-return,
+        -readability-static-accessed-through-instance,
+        -readability-avoid-const-params-in-decls,
+        -cppcoreguidelines-non-private-member-variables-in-classes,
+        -misc-non-private-member-variables-in-classes,
+"
+WarningsAsErrors: ''
+HeaderFilterRegex: ''
+FormatStyle: none
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cd42ee3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+bin/
+obj/
diff --git a/compile_flags.txt b/compile_flags.txt
new file mode 100644
index 0000000..d87afcf
--- /dev/null
+++ b/compile_flags.txt
@@ -0,0 +1,4 @@
+-Wall
+-Werror
+-pedantic
+-std=c99
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..bf800da
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,2 @@
+CFLAGS=-Wall -Werror -pedantic -std=c99
+LDFLAGS=-lz
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..4ce05bc
--- /dev/null
+++ b/makefile
@@ -0,0 +1,24 @@
+include config.mk
+
+SIMPLE=bin/simple
+SIMPLE_OBJ_FILES=obj/simple.o
+
+release: $(SIMPLE)
+release: CFLAGS+=-DNDEBUG -O2
+
+debug: $(SIMPLE)
+debug: CFLAGS+=-g
+
+$(SIMPLE): $(SIMPLE_OBJ_FILES) | bin
+        cc $(LDFLAGS) $^ -o $@
+
+obj/%.o: src/%.c | obj
+        cc $(CFLAGS) -c $< -o $@
+
+bin obj:
+        mkdir -p $@
+
+clean:
+        rm -rf bin obj
+
+.PHONY: release debug clean
diff --git a/src/simple.c b/src/simple.c
new file mode 100644
index 0000000..5209841
--- /dev/null
+++ b/src/simple.c
@@ -0,0 +1,77 @@
+// Standard C
+#include <stdio.h>
+#include <stdlib.h>
+
+// System
+#include <unistd.h>
+
+// zlib
+#include <zlib.h>
+
+static void
+usage(void)
+{
+        (void) fprintf(stderr, "compress [-d] infile outfile\n");
+        exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+        // int compress = 1;
+        int level = 5;
+
+        int opt = 0;
+        while ( (opt = getopt(argc, argv, "dl")) != -1 ) {
+                switch ( opt ) {
+                case 'd':
+                        // compress = 0; // decompress
+                        break;
+
+                case 'l':
+                        level = 9;
+                        break;
+
+                case '?':
+                default:
+                        usage();
+                        break;
+                }
+        }
+        argc -= optind;
+        argv += optind;
+
+        if ( argc != 2 ) {
+                usage();
+        }
+
+        FILE *in_file  = fopen(argv[0], "rb");
+        FILE *out_file = fopen(argv[1], "wb");
+
+        (void) fseek(in_file, 0, SEEK_END);
+        unsigned long insize = ftell(in_file); // max 2GB...
+        (void) fseek(in_file, 0, SEEK_SET);
+
+        unsigned char *indata = malloc(insize);
+        (void) fread(indata, 1, insize, in_file);
+
+        unsigned long  outsize = compressBound(insize);
+        unsigned char *outdata = malloc(outsize);
+
+        int res = compress2(outdata, &outsize, indata, insize, level);
+
+        if ( res == Z_OK ) {
+                (void) fwrite(outdata, 1, outsize, out_file);
+        }
+        else {
+                printf("Error: %d\n", res);
+        }
+
+        free(outdata);
+        free(indata);
+
+        (void) fclose(out_file);
+        (void) fclose(in_file);
+
+        return EXIT_SUCCESS;
+}