First steps toward a C library for Preserves

implementations/c/.gitignore

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+m.output.txt
+m

implementations/c/Makefile

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+m: main.c preserves.h
+	gcc -Wall -Wextra -Werror -g3 -o $@ main.c
+
+go: m
+	cat ../../tests/samples.bin | ./m | tee m.output.txt
+
+clean:
+	rm -f m

implementations/c/main.c

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+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define PRESERVES_IMPLEMENTATION
+#include "preserves.h"
+
+int main(__attribute__ ((unused)) int argc,
+         __attribute__ ((unused)) char const * const argv[])
+{
+  preserves_bytes_t input = preserves_create_bytes();
+
+  {
+    preserves_bytes_t chunk = preserves_create_bytes();
+    if (preserves_resize_bytes(&chunk, 131072) == -1) {
+      perror("allocating chunk");
+      return EXIT_FAILURE;
+    }
+
+    while (true) {
+      size_t count = fread(chunk.ptr, 1, chunk.len, stdin);
+      if (count == 0) {
+        if (ferror(stdin)) {
+          perror("reading");
+          return EXIT_FAILURE;
+        }
+        break;
+      }
+      if (preserves_extend_bytes(&input, preserves_bytes_subsequence(&chunk, 0, count)) == -1) {
+        perror("appending");
+        return EXIT_FAILURE;
+      }
+    }
+
+    preserves_free_bytes(&chunk);
+  }
+
+  {
+    preserves_reader_t reader = preserves_create_reader();
+    preserves_reader_result_t result = preserves_read_binary(&reader, &input, 1);
+    if (result.index == NULL) {
+      perror("parsing");
+      return EXIT_FAILURE;
+    }
+
+    printf("Size of index: %lu bytes; %lu entries\n",
+           reader.index_pos * sizeof(preserves_index_entry_t),
+           reader.index_pos);
+
+    if (true) {
+      for (preserves_index_entry_t *i = result.index; i != result.end_marker; i++) {
+        preserves_dump_index_entry(stdout, &reader.input, i, true);
+      }
+      preserves_dump_index_entry(stdout, &reader.input, result.end_marker, true);
+    }
+
+    preserves_free_reader(&reader);
+  }
+
+  preserves_free_bytes(&input);
+  return EXIT_SUCCESS;
+}