From 442a49ad5a48d417345959b903ae6a6d32d55759 Mon Sep 17 00:00:00 2001
From: Haidong Ji
Date: Fri, 15 Apr 2022 15:51:30 -0500
Subject: Great C programming fun

Excellent fundamentals and displine training, many tools and techniques
exercises: gdb, emacs, valgrind, git
---
 32_kvs/kv.c~ | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 32_kvs/kv.c~

(limited to '32_kvs/kv.c~')

diff --git a/32_kvs/kv.c~ b/32_kvs/kv.c~
new file mode 100644
index 0000000..d215207
--- /dev/null
+++ b/32_kvs/kv.c~
@@ -0,0 +1,81 @@
+#include "kv.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char *splitLine2KV(char *line, const char *delim) {
+  char *v = strstr(line, delim);
+
+  if (v == NULL)
+    return NULL;
+
+  *v = '\0';
+  return v + strlen(delim);
+}
+
+kvarray_t *readKVs(const char *fname) {
+  FILE *f = fopen(fname, "r");
+  if (f == NULL) {
+    fprintf(stderr, "Could not open file\n");
+    return NULL;
+  }
+
+  kvarray_t *kvArray = malloc(sizeof(*kvArray));
+  kvArray->kvarray = NULL;
+  char *line = NULL;
+  size_t sz = 0;
+  int i = 0;
+
+  while (getline(&line, &sz, f) >= 0) {
+    char *v;
+    v = splitLine2KV(line, "=");
+    if (v) {
+      char *value = malloc((strlen(v) + 1) * sizeof(*value));
+      strcpy(value, strtok(v, "\n"));
+      char *key = malloc((strlen(line) + 1) * sizeof(*key));
+      strcpy(key, line);
+
+      kvpair_t *kvPair = malloc(sizeof(kvPair));
+      kvPair->key = key;
+      kvPair->value = value;
+      kvArray->kvarray = realloc(kvArray->kvarray, (i + 1) * sizeof(kvpair_t));
+      kvArray->kvarray[i] = *kvPair;
+      free(kvPair);
+      i++;
+      kvArray->kvarrayLength = i;
+    }
+  }
+  free(line);
+
+  if (fclose(f) != 0) {
+    fprintf(stderr, "Could not close file\n");
+    return NULL;
+  }
+
+  return kvArray;
+}
+
+void freeKVs(kvarray_t *pairs) {
+  for (int i = 0; i < pairs->kvarrayLength; i++) {
+    free(pairs->kvarray[i].key);
+    free(pairs->kvarray[i].value);
+  }
+  free(pairs->kvarray);
+  free(pairs);
+}
+
+void printKVs(kvarray_t *pairs) {
+  for (int i = 0; i < pairs->kvarrayLength; i++) {
+    printf("key = '%s' value = '%s'\n", pairs->kvarray[i].key,
+           pairs->kvarray[i].value);
+  }
+}
+
+char *lookupValue(kvarray_t *pairs, const char *key) {
+  for (int i = 0; i < pairs->kvarrayLength; i++) {
+    if (strcmp(pairs->kvarray[i].key, key) == 0) {
+      return pairs->kvarray[i].value;
+    }
+  }
+  return NULL;
+}
-- 
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