rename src-self-hosted/ to src/

src/stage1/errmsg.cpp

@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2016 Andrew Kelley
+ *
+ * This file is part of zig, which is MIT licensed.
+ * See http://opensource.org/licenses/MIT
+ */
+
+#include "errmsg.hpp"
+#include "os.hpp"
+
+#include <stdio.h>
+
+enum ErrType {
+    ErrTypeError,
+    ErrTypeNote,
+};
+
+static void print_err_msg_type(ErrorMsg *err, ErrColor color, ErrType err_type) {
+    bool is_tty = os_stderr_tty();
+    bool use_colors = color == ErrColorOn || (color == ErrColorAuto && is_tty);
+
+    // Show the error location, if available
+    if (err->path != nullptr) {
+        const char *path = buf_ptr(err->path);
+        Slice<const char> pathslice{path, strlen(path)};
+
+        // Cache cwd
+        static Buf *cwdbuf{nullptr};
+        static Slice<const char> cwd;
+
+        if (cwdbuf == nullptr) {
+            cwdbuf = buf_alloc();
+            Error err = os_get_cwd(cwdbuf);
+            if (err != ErrorNone)
+                zig_panic("get cwd failed");
+            buf_append_char(cwdbuf, ZIG_OS_SEP_CHAR);
+            cwd.ptr = buf_ptr(cwdbuf);
+            cwd.len = strlen(cwd.ptr);
+        }
+
+        const size_t line = err->line_start + 1;
+        const size_t col = err->column_start + 1;
+        if (use_colors) os_stderr_set_color(TermColorBold);
+
+        // Strip cwd from path
+        if (memStartsWith(pathslice, cwd))
+            fprintf(stderr, ".%c%s:%" ZIG_PRI_usize ":%" ZIG_PRI_usize ": ", ZIG_OS_SEP_CHAR, path+cwd.len, line, col);
+        else
+            fprintf(stderr, "%s:%" ZIG_PRI_usize ":%" ZIG_PRI_usize ": ", path, line, col);
+    }
+
+    // Write out the error type
+    switch (err_type) {
+        case ErrTypeError:
+            if (use_colors) os_stderr_set_color(TermColorRed);
+            fprintf(stderr, "error: ");
+            break;
+        case ErrTypeNote:
+            if (use_colors) os_stderr_set_color(TermColorCyan);
+            fprintf(stderr, "note: ");
+            break;
+        default:
+            zig_unreachable();
+    }
+
+    // Write out the error message
+    if (use_colors) os_stderr_set_color(TermColorBold);
+    fputs(buf_ptr(err->msg), stderr);
+    if (use_colors) os_stderr_set_color(TermColorReset);
+    fputc('\n', stderr);
+
+    if (buf_len(&err->line_buf) != 0){
+        // Show the referenced line
+        fprintf(stderr, "%s\n", buf_ptr(&err->line_buf));
+        for (size_t i = 0; i < err->column_start; i += 1) {
+            fprintf(stderr, " ");
+        }
+        // Draw the caret
+        if (use_colors) os_stderr_set_color(TermColorGreen);
+        fprintf(stderr, "^");
+        if (use_colors) os_stderr_set_color(TermColorReset);
+        fprintf(stderr, "\n");
+    }
+
+    for (size_t i = 0; i < err->notes.length; i += 1) {
+        ErrorMsg *note = err->notes.at(i);
+        print_err_msg_type(note, color, ErrTypeNote);
+    }
+}
+
+void print_err_msg(ErrorMsg *err, ErrColor color) {
+    print_err_msg_type(err, color, ErrTypeError);
+}
+
+void err_msg_add_note(ErrorMsg *parent, ErrorMsg *note) {
+    parent->notes.append(note);
+}
+
+ErrorMsg *err_msg_create_with_offset(Buf *path, size_t line, size_t column, size_t offset,
+        const char *source, Buf *msg)
+{
+    ErrorMsg *err_msg = heap::c_allocator.create<ErrorMsg>();
+    err_msg->path = path;
+    err_msg->line_start = line;
+    err_msg->column_start = column;
+    err_msg->msg = msg;
+
+    if (source == nullptr) {
+        // Must initialize the buffer anyway
+        buf_init_from_str(&err_msg->line_buf, "");
+        return err_msg;
+    }
+
+    size_t line_start_offset = offset;
+    for (;;) {
+        if (line_start_offset == 0) {
+            break;
+        }
+
+        line_start_offset -= 1;
+
+        if (source[line_start_offset] == '\n') {
+            line_start_offset += 1;
+            break;
+        }
+    }
+
+    size_t line_end_offset = offset;
+    while (source[line_end_offset] && source[line_end_offset] != '\n') {
+        line_end_offset += 1;
+    }
+
+    buf_init_from_mem(&err_msg->line_buf, source + line_start_offset, line_end_offset - line_start_offset);
+
+    return err_msg;
+}
+
+ErrorMsg *err_msg_create_with_line(Buf *path, size_t line, size_t column,
+        Buf *source, ZigList<size_t> *line_offsets, Buf *msg)
+{
+    ErrorMsg *err_msg = heap::c_allocator.create<ErrorMsg>();
+    err_msg->path = path;
+    err_msg->line_start = line;
+    err_msg->column_start = column;
+    err_msg->msg = msg;
+
+    size_t line_start_offset = line_offsets->at(line);
+    size_t end_line = line + 1;
+    size_t line_end_offset = (end_line >= line_offsets->length) ? buf_len(source) : line_offsets->at(line + 1);
+    size_t len = (line_end_offset + 1 > line_start_offset) ? (line_end_offset - line_start_offset - 1) : 0;
+    if (len == SIZE_MAX) len = 0;
+
+    buf_init_from_mem(&err_msg->line_buf, buf_ptr(source) + line_start_offset, len);
+
+    return err_msg;
+}