Blame src/output/slbt_output_error.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016  Z. Gilboa                                  */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <slibtool/slibtool.h>
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static const char aclr_reset[]   = "\x1b[0m";
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static const char aclr_bold[]    = "\x1b[1m";
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static const char aclr_green[]   = "\x1b[32m";
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static const char aclr_blue[]    = "\x1b[34m";
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static const char aclr_magenta[] = "\x1b[35m";
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static const char * slbt_output_error_header(const struct slbt_error_info * erri)
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{
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	if (erri->flags & SLBT_ERROR_CHILD)
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		return "exec error upon";
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	else if (erri->flags & SLBT_ERROR_TOP_LEVEL)
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		return "error logged in";
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	else if (erri->flags & SLBT_ERROR_NESTED)
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		return "< returned to >";
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	else
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		return "distorted state";
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}
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static const char * slbt_output_strerror(const struct slbt_error_info * erri)
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{
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	if (erri->flags & SLBT_ERROR_CUSTOM)
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		return "flow error: unexpected condition or other.";
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	else if (erri->flags & SLBT_ERROR_NESTED)
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		return "";
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	else if (erri->flags & SLBT_ERROR_CHILD)
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		return "(see child process error messages)";
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	else if (erri->syserror == ENOBUFS)
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		return "input error: string length exceeds buffer size.";
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	else
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		return strerror(erri->syserror);
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}
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static int slbt_output_error_record_plain(
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	const struct slbt_driver_ctx *	dctx,
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	const struct slbt_error_info *	erri)
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{
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	const char * errdesc = slbt_output_strerror(erri);
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	if (fprintf(stderr,"%s: %s %s(), line %d%s%s.\n",
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			dctx->program,
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			slbt_output_error_header(erri),
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			erri->function,
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			erri->line,
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			strlen(errdesc) ? ": " : "",
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			errdesc) < 0)
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		return -1;
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	return fflush(stderr);
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}
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static int slbt_output_error_record_annotated(
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	const struct slbt_driver_ctx *	dctx,
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	const struct slbt_error_info *	erri)
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{
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	const char * errdesc = slbt_output_strerror(erri);
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	if (fprintf(
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			stderr,
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			"%s%s%s:%s %s%s%s %s%s%s()%s, %s%sline %d%s%s%s%s%s.\n",
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			aclr_bold,aclr_magenta,
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			dctx->program,
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			aclr_reset,
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			aclr_bold,
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			slbt_output_error_header(erri),
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			aclr_reset,
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			aclr_bold,aclr_blue,
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			erri->function,
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			aclr_reset,
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			aclr_bold,aclr_green,
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			erri->line,
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			aclr_reset,
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			strlen(errdesc) ? ": " : "",
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			aclr_bold,
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			slbt_output_strerror(erri),
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			aclr_reset) < 0)
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		return -1;
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	return fflush(stderr);
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}
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int slbt_output_error_record(
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	const struct slbt_driver_ctx *	dctx,
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	const struct slbt_error_info *	erri)
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{
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	if (dctx->cctx->drvflags & SLBT_DRIVER_ANNOTATE_NEVER)
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		return slbt_output_error_record_plain(dctx,erri);
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	else if (dctx->cctx->drvflags & SLBT_DRIVER_ANNOTATE_ALWAYS)
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		return slbt_output_error_record_annotated(dctx,erri);
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	else if (isatty(STDERR_FILENO))
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		return slbt_output_error_record_annotated(dctx,erri);
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	else
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		return slbt_output_error_record_plain(dctx,erri);
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}
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static int slbt_output_error_vector_plain(const struct slbt_driver_ctx * dctx)
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{
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	struct slbt_error_info ** perr;
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	for (perr=dctx->errv; *perr; perr++)
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		if (slbt_output_error_record_plain(dctx,*perr))
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			return -1;
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	return 0;
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}
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static int slbt_output_error_vector_annotated(const struct slbt_driver_ctx * dctx)
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{
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	struct slbt_error_info ** perr;
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	for (perr=dctx->errv; *perr; perr++)
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		if (slbt_output_error_record_annotated(dctx,*perr))
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			return -1;
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	return 0;
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}
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int slbt_output_error_vector(const struct slbt_driver_ctx * dctx)
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{
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	if (dctx->cctx->drvflags & SLBT_DRIVER_ANNOTATE_NEVER)
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		return slbt_output_error_vector_plain(dctx);
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	else if (dctx->cctx->drvflags & SLBT_DRIVER_ANNOTATE_ALWAYS)
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		return slbt_output_error_vector_annotated(dctx);
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	else if (isatty(STDERR_FILENO))
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		return slbt_output_error_vector_annotated(dctx);
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	else
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		return slbt_output_error_vector_plain(dctx);
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}