Switch to c++

src/utils.cc

@@ -0,0 +1,87 @@
+extern "C" {
+#include "../libs/libgrapheme/grapheme.h"
+}
+#include "../include/utils.h"
+#include <cstdarg>
+#include <cstdint>
+#include <cstdio>
+#include <limits.h>
+#include <string.h>
+#include <string>
+#include <unistd.h>
+
+std::string get_exe_dir() {
+  char exe_path[PATH_MAX];
+  ssize_t count = readlink("/proc/self/exe", exe_path, PATH_MAX);
+  if (count == -1)
+    return "";
+  exe_path[count] = '\0';
+  std::string path(exe_path);
+  return path.substr(0, path.find_last_of('/'));
+}
+
+uint32_t grapheme_strlen(const char *s) {
+  if (!s)
+    return 0;
+  uint32_t count = 0;
+  const char *p = s;
+  while (*p) {
+    uint32_t next = grapheme_next_character_break_utf8(p, UINT32_MAX);
+    if (!next)
+      next = 1;
+    p += next;
+    count++;
+  }
+  return count;
+}
+
+uint32_t get_visual_col_from_bytes(const char *line, uint32_t byte_limit) {
+  if (!line)
+    return 0;
+  uint32_t visual_col = 0;
+  uint32_t current_byte = 0;
+  uint32_t len = strlen(line);
+  if (len > 0 && line[len - 1] == '\n')
+    len--;
+  while (current_byte < byte_limit && current_byte < len) {
+    uint32_t inc = grapheme_next_character_break_utf8(line + current_byte,
+                                                      len - current_byte);
+    if (current_byte + inc > byte_limit)
+      break;
+    current_byte += inc;
+    visual_col++;
+  }
+  return visual_col;
+}
+
+uint32_t get_bytes_from_visual_col(const char *line,
+                                   uint32_t target_visual_col) {
+  if (!line)
+    return 0;
+  uint32_t visual_col = 0;
+  uint32_t current_byte = 0;
+  uint32_t len = strlen(line);
+  if (len > 0 && line[len - 1] == '\n')
+    len--;
+  while (visual_col < target_visual_col && current_byte < len) {
+    uint32_t inc = grapheme_next_character_break_utf8(line + current_byte,
+                                                      len - current_byte);
+    current_byte += inc;
+    visual_col++;
+  }
+  return current_byte;
+}
+
+void log(const char *fmt, ...) {
+  FILE *fp = fopen("/tmp/log.txt", "a");
+  if (!fp)
+    return;
+
+  va_list args;
+  va_start(args, fmt);
+  vfprintf(fp, fmt, args);
+  va_end(args);
+
+  fputc('\n', fp);
+  fclose(fp);
+}