From 2253da61e9b3dd5408bed182ea08e5270156c17e Mon Sep 17 00:00:00 2001 From: Kimplul Date: Tue, 3 Dec 2024 22:04:38 +0200 Subject: initial commit + Lots of code copied from ek, so didn't have to start from scratch, but might mean there are some quirks here and there that made sense in ek but not necessarily here. --- src/debug.c | 193 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 src/debug.c (limited to 'src/debug.c') diff --git a/src/debug.c b/src/debug.c new file mode 100644 index 0000000..f47a022 --- /dev/null +++ b/src/debug.c @@ -0,0 +1,193 @@ +/* SPDX-License-Identifier: copyleft-next-0.3.1 */ +/* Copyright 2024 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */ + +/** + * @file debug.c + * + * Debugging and information printing helper implementations. + */ + +#include +#include +#include +#include +#include +#include + +#include + +/** + * Get string representation of issue_level. + * + * @param level issue_level to get string representation for. + * @return \p level as a string. + */ +const char *issue_level_str(enum issue_level level) +{ + switch (level) { + case SRC_INFO: return "info"; + case SRC_WARN: return "warn"; + case SRC_ERROR: return "error"; + } + + return "unknown"; +} + +/** + * Find position in file buffer where line number \p no + * starts. Lines are assumed to be one-indexed, with + * \p no = \c 0 and \p no = \c 1 both considered the first line. + * + * @param buf Buffer to look in. + * @param no Line number whose start to look for. + * @return Pointer to location in buffer where line number \p no + * starts. + */ +static const char *find_lineno(const char *buf, size_t no) +{ + if (no == 0 || no == 1) + return buf; + + char c; + while ((c = *buf)) { + buf++; + + if (c == '\n') + no--; + + if (no == 1) + break; + } + + return buf; +} + +/** + * Helper for printing out an issue. + * + * @param issue Issue context. + * @param fmt Format string. Follows standard printf() formatting. + * @param args Arguments for \p fmt. + */ +static void _issue(struct src_issue issue, const char *fmt, va_list args) +{ + /* get start and end of current line in buffer */ + const char *line_start = find_lineno(issue.fctx.fbuf, + (size_t)issue.loc.first_line); + const char *line_end = strchr(line_start, '\n'); + if (!line_end) + line_end = strchr(line_start, 0); + + const int line_len = (int)(line_end - line_start); + + fprintf(stderr, "%s:%i:%i: %s: ", issue.fctx.fname, + issue.loc.first_line, + issue.loc.first_col, + issue_level_str(issue.level)); + + vfprintf(stderr, fmt, args); + fputc('\n', stderr); + + int lineno_len = snprintf(NULL, 0, "%i", issue.loc.first_line); + fputc(' ', stderr); + fprintf(stderr, "%i | ", issue.loc.first_line); + + fprintf(stderr, "%.*s\n", line_len, line_start); + + for (int i = 0; i < lineno_len + 2; ++i) + fputc(' ', stderr); + + fprintf(stderr, "| "); + + for (int i = 0; i < issue.loc.first_col - 1; ++i) + fputc(line_start[i] == '\t' ? '\t' : ' ', stderr); + + for (int i = issue.loc.first_col; i < issue.loc.last_col; ++i) { + if (i == issue.loc.first_col) + fputc('^', stderr); + else + fputc('~', stderr); + } + + fputc('\n', stderr); +} + +void src_issue(struct src_issue issue, const char *err_msg, ...) +{ + va_list args; + va_start(args, err_msg); + _issue(issue, err_msg, args); + va_end(args); +} + +void semantic_error(struct file_ctx fctx, struct ast *node, + const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + struct src_issue issue; + issue.level = SRC_ERROR; + issue.loc = node->loc; + issue.fctx = fctx; + _issue(issue, fmt, args); + va_end(args); +} + +void loc_error(struct file_ctx fctx, struct src_loc loc, + const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + struct src_issue issue; + issue.level = SRC_ERROR; + issue.loc = loc; + issue.fctx = fctx; + _issue(issue, fmt, args); + va_end(args); +} + +void semantic_warn(struct file_ctx fctx, struct ast *node, const char *fmt, + ...) +{ + va_list args; + va_start(args, fmt); + struct src_issue issue; + issue.level = SRC_WARN; + issue.loc = node->loc; + issue.fctx = fctx; + _issue(issue, fmt, args); + va_end(args); +} + +void semantic_info(struct file_ctx fctx, struct ast *node, const char *fmt, + ...) +{ + va_list args; + va_start(args, fmt); + struct src_issue issue; + issue.level = SRC_INFO; + issue.loc = node->loc; + issue.fctx = fctx; + _issue(issue, fmt, args); + va_end(args); +} + +void internal_error(const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + fprintf(stderr, "internal error: "); + vfprintf(stderr, fmt, args); + fprintf(stderr, "\n"); + va_end(args); +} + +void internal_warn(const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + fprintf(stderr, "internal warning: "); + vfprintf(stderr, fmt, args); + fprintf(stderr, "\n"); + va_end(args); +} -- cgit v1.2.3