136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
/*
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* Copyright (c) 2016 Andrew Kelley
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*
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* This file is part of zig, which is MIT licensed.
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* See http://opensource.org/licenses/MIT
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*/
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#include "errmsg.hpp"
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#include "os.hpp"
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#include <stdio.h>
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enum ErrType {
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ErrTypeError,
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ErrTypeNote,
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};
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static void print_err_msg_type(ErrorMsg *err, ErrColor color, ErrType err_type) {
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bool supports_color = os_stderr_supports_color();
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bool use_colors = color == ErrColorOn || (color == ErrColorAuto && supports_color);
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// Show the error location, if available
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if (err->path != nullptr) {
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const char *path = buf_ptr(err->path);
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Slice<const char> pathslice{path, strlen(path)};
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// Cache cwd
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static Buf *cwdbuf{nullptr};
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static Slice<const char> cwd;
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if (cwdbuf == nullptr) {
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cwdbuf = buf_alloc();
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Error err = os_get_cwd(cwdbuf);
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if (err != ErrorNone)
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zig_panic("get cwd failed");
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buf_append_char(cwdbuf, ZIG_OS_SEP_CHAR);
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cwd.ptr = buf_ptr(cwdbuf);
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cwd.len = strlen(cwd.ptr);
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}
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const size_t line = err->line_start + 1;
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const size_t col = err->column_start + 1;
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if (use_colors) os_stderr_set_color(TermColorBold);
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// Strip cwd from path
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if (memStartsWith(pathslice, cwd))
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fprintf(stderr, ".%c%s:%" ZIG_PRI_usize ":%" ZIG_PRI_usize ": ", ZIG_OS_SEP_CHAR, path+cwd.len, line, col);
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else
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fprintf(stderr, "%s:%" ZIG_PRI_usize ":%" ZIG_PRI_usize ": ", path, line, col);
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}
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// Write out the error type
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switch (err_type) {
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case ErrTypeError:
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if (use_colors) os_stderr_set_color(TermColorRed);
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fprintf(stderr, "error: ");
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break;
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case ErrTypeNote:
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if (use_colors) os_stderr_set_color(TermColorCyan);
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fprintf(stderr, "note: ");
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break;
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default:
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zig_unreachable();
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}
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// Write out the error message
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if (use_colors) os_stderr_set_color(TermColorBold);
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fputs(buf_ptr(err->msg), stderr);
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if (use_colors) os_stderr_set_color(TermColorReset);
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fputc('\n', stderr);
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if (buf_len(&err->line_buf) != 0){
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// Show the referenced line
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fprintf(stderr, "%s\n", buf_ptr(&err->line_buf));
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for (size_t i = 0; i < err->column_start; i += 1) {
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fprintf(stderr, " ");
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}
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// Draw the caret
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if (use_colors) os_stderr_set_color(TermColorGreen);
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fprintf(stderr, "^");
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if (use_colors) os_stderr_set_color(TermColorReset);
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fprintf(stderr, "\n");
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}
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for (size_t i = 0; i < err->notes.length; i += 1) {
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ErrorMsg *note = err->notes.at(i);
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print_err_msg_type(note, color, ErrTypeNote);
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}
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}
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void print_err_msg(ErrorMsg *err, ErrColor color) {
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print_err_msg_type(err, color, ErrTypeError);
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}
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void err_msg_add_note(ErrorMsg *parent, ErrorMsg *note) {
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parent->notes.append(note);
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}
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ErrorMsg *err_msg_create_with_offset(Buf *path, uint32_t byte_offset, const char *source,
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Buf *msg)
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{
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ErrorMsg *err_msg = heap::c_allocator.create<ErrorMsg>();
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err_msg->path = path;
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err_msg->msg = msg;
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err_msg->line_start = 0;
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err_msg->column_start = 0;
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if (source == nullptr) {
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// Must initialize the buffer anyway
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buf_init_from_str(&err_msg->line_buf, "");
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return err_msg;
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}
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size_t line_start = 0;
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size_t i = 0;
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for (;i < byte_offset; i += 1) {
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switch (source[i]) {
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case '\n':
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err_msg->line_start += 1;
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err_msg->column_start = 0;
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line_start = i + 1;
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continue;
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default:
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err_msg->column_start += 1;
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continue;
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}
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}
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while (source[i] != '\n' && source[i] != 0) {
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i += 1;
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}
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buf_init_from_mem(&err_msg->line_buf, source + line_start, i - line_start);
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return err_msg;
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}
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