ref: split reader into separate files

src/compiler/reader/rd_fmtstr.c

@@ -0,0 +1,75 @@
+#include <compiler/fzl_reader.h>
+#include <compiler/internals/reader.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Parse string format
+fzl_token_t *rd_fmtstr(fzl_reader_t *reader)
+{
+  size_t p  = reader->position;
+  char *src = reader->source;
+
+  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 (src[p] == '{')
+  {
+    move(reader, 1);
+    fzl_token_t *id = rd_name(reader);
+
+    if (id == NULL || src[reader->position] != '}')
+    {
+      snprintf(last_err, sizeof(last_err),
+               "'%s':%zu:%zu => failed to parse format string", l.filename,
+               l.line, l.col);
+      fzl_freetoken(id);
+      return NULL;
+    }
+
+    move(reader, 1);
+    return id;
+  }
+
+  if (src[p] == '"')
+  {
+    move(reader, 1);
+
+    return fzl_mktoken(FZL_TOKTYPE_STR_FORMAT_END, l.line, l.col, NULL, 0,
+                       l.filename);
+  }
+
+  size_t size = 0;
+  size_t lpos = p;
+
+  do
+  {
+    if (src[lpos + 1] == '"')
+      break;
+
+    size++;
+    lpos++;
+  } while (lpos < reader->size && reader->source[lpos] != '{' &&
+           reader->source[lpos] != '"');
+
+  ok = fzl_linked_getpos(reader->linked, reader->position, &l);
+  if (!ok)
+  {
+    snprintf(last_err, sizeof(last_err), "failed to locate line:col");
+    return NULL;
+  }
+
+  char *value = malloc(size);
+  memcpy(value, reader->source + reader->position, size);
+  fzl_token_t *tok = fzl_mktoken(FZL_TOKTYPE_STR_LITERAL, l.line, l.col, value,
+                                 size, l.filename);
+  free(value);
+  move(reader, size);
+
+  return tok;
+}