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/*
* 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;
}
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