diff options
Diffstat (limited to 'src/diag.c')
| -rw-r--r-- | src/diag.c | 233 |
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; +} |