INITIAL COMMIT

README.md

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+# Wizard Apprentice Standard Library
+
+A collection of useful C/C++ utilities for my projects

aliases/aliases.h

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+#ifndef ALIASES_H
+#define ALIASES_H
+
+#include <stdint.h>
+
+#define u8 uint8_t
+#define u16 uint16_t
+#define u32 uint32_t
+#define u64 uint64_t
+
+#define i8 int8_t
+#define i16 int16_t
+#define i32 int32_t
+#define i64 int64_t
+
+#define f32 float
+#define f64 double
+#define f128 long double
+
+#define INTERNAL static
+#define PERSISTENT static
+
+#ifdef __cplusplus
+#define CLASS_MEMBER static
+#endif // __cplusplus
+
+#endif // !ALIASES_H

cpath/include/cpath.h

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+#ifndef PATH_UTILS_H
+#define PATH_UTILS_H
+
+#include "aliases.h"
+
+#define NUMPARTS(...)                                                          \
+  (sizeof((const char *[]){"", __VA_ARGS__}) / sizeof(const char *) - 1)
+
+#define JOIN_PATH(DST, ...) join_path(DST, NUMPARTS(__VA_ARGS__), __VA_ARGS__)
+
+void join_path(char *dst, u64 count, ...);
+
+#define DIRNAME(DST, PATH) dirup(DST, 1, PATH)
+#define DIRUP(DST, COUNT, PATH) dirup(DST, COUNT, PATH)
+
+void dirup(char *dst, u64 levels, const char *path);
+
+#endif // !PATH_UTILS_H

cpath/src/cpath.c

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+#include "cpath.h"
+#include "aliases.h"
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#if defined(__unix__) || defined(__APPLE__) || defined(__ANDROID__)
+INTERNAL char path_sep = '/';
+#elif defined(_WIN32) || defined(_WIN64)
+INTERNAL char path_sep = '\\';
+#endif
+
+void join_root_and_leaf(const char *root, const char *leaf, char *dst);
+
+void join_path(char *dst, u64 count, ...) {
+  va_list args;
+
+  va_start(args, count);
+
+  for (u64 i = 0; i < count; ++i) {
+    join_root_and_leaf(dst, va_arg(args, const char *), dst);
+  }
+
+  va_end(args);
+}
+
+void dirup(char *dst, u64 levels, const char *path) {
+  if (levels < 1) {
+    return;
+  }
+
+  u64 end_index = 0;
+  u64 sep_count = 0;
+
+  u64 length = strlen(path);
+  if (path[length - 1] == path_sep) {
+    --length;
+  }
+
+  for (u64 i = length - 1; i >= 0; --i) {
+    if (path[i] == path_sep) {
+      ++sep_count;
+      end_index = i;
+
+      if (sep_count == levels) {
+        break;
+      }
+    }
+  }
+
+  if (sep_count < levels) {
+    end_index = 0;
+  }
+
+  strncpy(dst, path, end_index);
+}
+
+void join_root_and_leaf(const char *root, const char *leaf, char *dst) {
+  u64 root_length = strlen(root);
+  u64 root_end = root_length - 1;
+
+  u64 leaf_length = strlen(leaf);
+  u64 leaf_start = 0;
+
+  if (root[root_end] == path_sep) {
+    --root_end;
+  }
+
+  if (leaf[leaf_start] == path_sep) {
+    ++leaf_start;
+  }
+
+  memcpy(dst, root, ++root_end);
+
+  dst[root_end] = path_sep;
+
+  memcpy(&(dst[++root_end]), &(leaf[leaf_start]), leaf_length - leaf_start);
+}

dstr/include/dstr.h

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+#ifndef DSTR_H
+#define DSTR_H
+
+#include "aliases.h"
+
+typedef struct dstring dstr_t;
+
+dstr_t *dstr_with_capacity(u64 capacity);
+dstr_t *dstr_from_string(const char *str);
+void dstr_update(dstr_t **dst, const char *src);
+void dstr_free(dstr_t **str);
+void dstr_concat(dstr_t **dst, const char *src);
+void dstr_append(dstr_t **dst, char c);
+void dstr_resize(dstr_t **str);
+void dstr_clear(dstr_t *str);
+void dstr_print(const dstr_t *str);
+i64 dstr_find(const dstr_t *str, const char *substr);
+u64 dstr_length(const dstr_t *str);
+u64 dstr_capacity(const dstr_t *str);
+const char *dstr_to_cstr(const dstr_t *str);
+
+#endif // !DSTR_H

dstr/src/dstr.c

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+#include "dstr.h"
+#include "aliases.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Use this scalar to allocate extra memory in order to avoid having to
+// constantly reallocate
+#define CAPACITY_SCALAR 8
+
+struct dstring {
+  u64 capacity;
+  u64 size;
+  char buf[];
+};
+
+dstr_t *dstr_with_capacity(u64 capacity) {
+  dstr_t *out = (dstr_t *)malloc(sizeof(dstr_t) + capacity + 1);
+
+  if (!out) {
+    return NULL;
+  }
+
+  out->capacity = capacity;
+  out->size = 0;
+  memset(out->buf, 0, capacity + 1);
+
+  return out;
+}
+
+dstr_t *dstr_from_string(const char *str) {
+  if (!str) {
+    return NULL;
+  }
+
+  u64 length = strlen(str);
+
+  u64 capacity = length * CAPACITY_SCALAR;
+
+  dstr_t *out = dstr_with_capacity(capacity);
+
+  if (!out) {
+    return NULL;
+  }
+
+  out->size = length;
+  strncpy(out->buf, str, length);
+
+  return out;
+}
+
+void dstr_update(dstr_t **dst, const char *src) {
+  if (!dst || !(*dst)) {
+    return;
+  }
+
+  u64 length = strlen(src);
+
+  dstr_t *str = *dst;
+
+  if (length <= str->capacity) {
+    memset(str->buf, 0, str->capacity);
+
+    str->size = length;
+
+    strncpy(str->buf, src, length);
+  } else {
+    u64 capacity = length * CAPACITY_SCALAR;
+
+    dstr_t *tmp = (dstr_t *)realloc(*dst, sizeof(dstr_t) + capacity + 1);
+
+    if (!tmp) {
+      return;
+    }
+
+    tmp->capacity = capacity;
+    tmp->size = length;
+    strncpy(tmp->buf, src, length);
+
+    *dst = tmp;
+  }
+}
+
+void dstr_free(dstr_t **str) {
+  if (!str || !(*str)) {
+    return;
+  }
+
+  free(*str);
+  *str = NULL;
+}
+
+void dstr_concat(dstr_t **dst, const char *src) {
+  if (!dst || !(*dst)) {
+    return;
+  }
+
+  u64 src_length = strlen(src);
+
+  if (src_length == 0) {
+    return;
+  }
+
+  u64 new_length = (*dst)->size + src_length;
+
+  char str[new_length + 1];
+  memset(str, 0, new_length + 1);
+
+  strncpy(str, (*dst)->buf, (*dst)->size);
+  strncat(str, src, src_length);
+
+  dstr_update(dst, str);
+}
+
+void dstr_append(dstr_t **dst, char c) {
+  if (!dst || !(*dst)) {
+    return;
+  }
+
+  u64 new_length = (*dst)->size + 1;
+
+  char str[new_length + 1];
+  memset(str, 0, new_length + 1);
+
+  strncpy(str, (*dst)->buf, (*dst)->size);
+  str[(*dst)->size] = c;
+
+  dstr_update(dst, str);
+}
+
+void dstr_resize(dstr_t **str) {
+  if (!str || !(*str)) {
+    return;
+  }
+
+  u64 capacity = (*str)->size;
+
+  dstr_t *tmp = (dstr_t *)realloc(*str, sizeof(dstr_t) + capacity + 1);
+
+  if (!tmp) {
+    return;
+  }
+
+  tmp->capacity = capacity;
+
+  *str = tmp;
+}
+
+void dstr_clear(dstr_t *str) {
+  if (!str || str->size == 0) {
+    return;
+  }
+
+  memset(str->buf, 0, str->capacity);
+  str->size = 0;
+}
+
+void dstr_print(const dstr_t *str) {
+  if (!str) {
+    return;
+  }
+
+  printf("%s\n", str->buf);
+}
+
+i64 dstr_find(const dstr_t *str, const char *substr) {
+  if (!str || !substr) {
+    return -1;
+  }
+
+  u64 substr_length = strlen(substr);
+
+  if (substr_length == 0 || substr_length > str->size) {
+    return -1;
+  }
+
+  char buf[substr_length + 1];
+  memset(buf, 0, substr_length + 1);
+
+  for (u64 i = 0; i < str->size; ++i) {
+    if (i + substr_length >= str->size) {
+      break;
+    }
+
+    for (u64 j = 0; j < substr_length; ++j) {
+      buf[j] = str->buf[i + j];
+    }
+
+    if (strcmp(buf, substr) == 0) {
+      return i;
+    }
+  }
+
+  return -1;
+}
+
+u64 dstr_length(const dstr_t *str) {
+  if (!str) {
+    return 0;
+  }
+
+  return str->size;
+}
+
+u64 dstr_capacity(const dstr_t *str) {
+  if (!str) {
+    return 0;
+  }
+
+  return str->capacity;
+}
+
+const char *dstr_to_cstr(const dstr_t *str) {
+  if (!str) {
+    return "";
+  }
+
+  return str->buf;
+}

example_build

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+#!/bin/bash
+
+INCLUDE=" \
+	-Ialiases \
+	-Icpath/include \
+	-Idstr/include \
+"
+
+SRC=" \
+	cpath/src/*.c \
+	dstr/src/*.c \
+"