ref: split reader into separate files

src/compiler/reader/rd_string_literal.c

@@ -0,0 +1,62 @@
+#include <compiler/fzl_reader.h>
+#include <compiler/fzl_token.h>
+#include <compiler/internals/reader.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Try parse string literal
+fzl_token_t *rd_string_literal(fzl_reader_t *reader)
+{
+  size_t lpos = reader->position;
+  size_t size = 0;
+
+  if (reader->source[lpos] != '\'' && reader->source[lpos] != '"')
+    return NULL;
+
+  char open_symbol  = reader->source[lpos];
+  char close_symbol = '\0';
+
+  do
+  {
+    lpos++;
+    size++;
+
+    if (reader->source[lpos] == open_symbol)
+      close_symbol = open_symbol;
+
+  } while (reader->source[lpos] != open_symbol && lpos < reader->size);
+  size++;
+
+  fzl_file_loc l;
+  bool ok = fzl_linked_getpos(reader->linked, reader->position, &l);
+  if (!ok)
+  {
+    snprintf(last_err, sizeof(last_err), "failed to locate line:col");
+    return NULL;
+  }
+
+  if (close_symbol != open_symbol)
+  {
+    snprintf(last_err, sizeof(last_err), "'%s': unterminated string at %ld:%ld",
+             l.filename, l.line, l.col);
+    return NULL;
+  }
+
+  if (size == 2)
+  {
+    fzl_token_t *tok =
+        fzl_mktoken(FZL_TOKTYPE_STR_LITERAL, l.line, l.col, "", 0, l.filename);
+    move(reader, 2);
+    return tok;
+  }
+
+  char *value = malloc(size - 2);
+  memcpy(value, reader->source + reader->position + 1, size - 2);
+  fzl_token_t *tok = fzl_mktoken(FZL_TOKTYPE_STR_LITERAL, l.line, l.col, value,
+                                 size - 2, l.filename);
+  free(value);
+  move(reader, size);
+
+  return tok;
+}