Source / Include Folder (#88)

Moved Source Files Into `src` Folder

1 files changed, 233 insertions, 0 deletions

diff --git a/src/diag.c b/src/diag.c
new file mode 100644
index 0000000..27848f1
--- /dev/null
+++ b/src/diag.c
@@ -0,0 +1,233 @@
+/****************************************************************************
+ * bfs                                                                      *
+ * Copyright (C) 2019-2022 Tavian Barnes <tavianator@tavianator.com>        *
+ *                                                                          *
+ * Permission to use, copy, modify, and/or distribute this software for any *
+ * purpose with or without fee is hereby granted.                           *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
+ ****************************************************************************/
+
+#include "diag.h"
+#include "ctx.h"
+#include "color.h"
+#include "expr.h"
+#include "util.h"
+#include <assert.h>
+#include <errno.h>
+#include <stdarg.h>
+
+void bfs_perror(const struct bfs_ctx *ctx, const char *str) {
+	bfs_error(ctx, "%s: %m.\n", str);
+}
+
+void bfs_error(const struct bfs_ctx *ctx, const char *format, ...)  {
+	va_list args;
+	va_start(args, format);
+	bfs_verror(ctx, format, args);
+	va_end(args);
+}
+
+bool bfs_warning(const struct bfs_ctx *ctx, const char *format, ...)  {
+	va_list args;
+	va_start(args, format);
+	bool ret = bfs_vwarning(ctx, format, args);
+	va_end(args);
+	return ret;
+}
+
+bool bfs_debug(const struct bfs_ctx *ctx, enum debug_flags flag, const char *format, ...)  {
+	va_list args;
+	va_start(args, format);
+	bool ret = bfs_vdebug(ctx, flag, format, args);
+	va_end(args);
+	return ret;
+}
+
+void bfs_verror(const struct bfs_ctx *ctx, const char *format, va_list args) {
+	int error = errno;
+
+	bfs_error_prefix(ctx);
+
+	errno = error;
+	cvfprintf(ctx->cerr, format, args);
+}
+
+bool bfs_vwarning(const struct bfs_ctx *ctx, const char *format, va_list args) {
+	int error = errno;
+
+	if (bfs_warning_prefix(ctx)) {
+		errno = error;
+		cvfprintf(ctx->cerr, format, args);
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool bfs_vdebug(const struct bfs_ctx *ctx, enum debug_flags flag, const char *format, va_list args) {
+	int error = errno;
+
+	if (bfs_debug_prefix(ctx, flag)) {
+		errno = error;
+		cvfprintf(ctx->cerr, format, args);
+		return true;
+	} else {
+		return false;
+	}
+}
+
+void bfs_error_prefix(const struct bfs_ctx *ctx) {
+	cfprintf(ctx->cerr, "${bld}%s:${rs} ${err}error:${rs} ", xbasename(ctx->argv[0]));
+}
+
+bool bfs_warning_prefix(const struct bfs_ctx *ctx) {
+	if (ctx->warn) {
+		cfprintf(ctx->cerr, "${bld}%s:${rs} ${wrn}warning:${rs} ", xbasename(ctx->argv[0]));
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool bfs_debug_prefix(const struct bfs_ctx *ctx, enum debug_flags flag) {
+	if (ctx->debug & flag) {
+		cfprintf(ctx->cerr, "${bld}%s:${rs} ${cyn}-D %s${rs}: ", xbasename(ctx->argv[0]), debug_flag_name(flag));
+		return true;
+	} else {
+		return false;
+	}
+}
+
+/** Recursive part of highlight_expr(). */
+static bool highlight_expr_recursive(const struct bfs_ctx *ctx, const struct bfs_expr *expr, bool *args) {
+	if (!expr) {
+		return false;
+	}
+
+	bool ret = false;
+
+	if (!expr->synthetic) {
+		size_t i = expr->argv - ctx->argv;
+		for (size_t j = 0; j < expr->argc; ++j) {
+			assert(i + j < ctx->argc);
+			args[i + j] = true;
+			ret = true;
+		}
+	}
+
+	if (bfs_expr_has_children(expr)) {
+		ret |= highlight_expr_recursive(ctx, expr->lhs, args);
+		ret |= highlight_expr_recursive(ctx, expr->rhs, args);
+	}
+
+	return ret;
+}
+
+/** Highlight an expression in the command line. */
+static bool highlight_expr(const struct bfs_ctx *ctx, const struct bfs_expr *expr, bool *args) {
+	for (size_t i = 0; i < ctx->argc; ++i) {
+		args[i] = false;
+	}
+
+	return highlight_expr_recursive(ctx, expr, args);
+}
+
+/** Print a highlighted portion of the command line. */
+static void bfs_argv_diag(const struct bfs_ctx *ctx, const bool *args, bool warning) {
+	if (warning) {
+		bfs_warning_prefix(ctx);
+	} else {
+		bfs_error_prefix(ctx);
+	}
+
+	size_t max_argc = 0;
+	for (size_t i = 0; i < ctx->argc; ++i) {
+		if (i > 0) {
+			cfprintf(ctx->cerr, " ");
+		}
+
+		if (args[i]) {
+			max_argc = i + 1;
+			cfprintf(ctx->cerr, "${bld}%s${rs}", ctx->argv[i]);
+		} else {
+			cfprintf(ctx->cerr, "%s", ctx->argv[i]);
+		}
+	}
+
+	cfprintf(ctx->cerr, "\n");
+
+	if (warning) {
+		bfs_warning_prefix(ctx);
+	} else {
+		bfs_error_prefix(ctx);
+	}
+
+	for (size_t i = 0; i < max_argc; ++i) {
+		if (i > 0) {
+			if (args[i - 1] && args[i]) {
+				cfprintf(ctx->cerr, "~");
+			} else {
+				cfprintf(ctx->cerr, " ");
+			}
+		}
+
+		if (args[i] && (i == 0 || !args[i - 1])) {
+			if (warning) {
+				cfprintf(ctx->cerr, "${wrn}");
+			} else {
+				cfprintf(ctx->cerr, "${err}");
+			}
+		}
+
+		size_t len = xstrwidth(ctx->argv[i]);
+		for (size_t j = 0; j < len; ++j) {
+			if (args[i]) {
+				cfprintf(ctx->cerr, "~");
+			} else {
+				cfprintf(ctx->cerr, " ");
+			}
+		}
+
+		if (args[i] && (i + 1 >= max_argc || !args[i + 1])) {
+			cfprintf(ctx->cerr, "${rs}");
+		}
+	}
+
+	cfprintf(ctx->cerr, "\n");
+}
+
+void bfs_argv_error(const struct bfs_ctx *ctx, const bool *args) {
+	bfs_argv_diag(ctx, args, false);
+}
+
+void bfs_expr_error(const struct bfs_ctx *ctx, const struct bfs_expr *expr) {
+	bool args[ctx->argc];
+	if (highlight_expr(ctx, expr, args)) {
+		bfs_argv_error(ctx, args);
+	}
+}
+
+bool bfs_argv_warning(const struct bfs_ctx *ctx, const bool *args) {
+	if (!ctx->warn) {
+		return false;
+	}
+
+	bfs_argv_diag(ctx, args, true);
+	return true;
+}
+
+bool bfs_expr_warning(const struct bfs_ctx *ctx, const struct bfs_expr *expr) {
+	bool args[ctx->argc];
+	if (highlight_expr(ctx, expr, args)) {
+		return bfs_argv_warning(ctx, args);
+	}
+
+	return false;
+}