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/**************************************************************/
/* treebnf: a tree oriented bnf library */
/* Copyright (C) 2024 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.TREEBNF. */
/**************************************************************/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <treebnf/treebnf.h>
#include "treebnf_driver_impl.h"
#include "treebnf_dprintf_impl.h"
static const char aclr_reset[] = "\x1b[0m";
static const char aclr_bold[] = "\x1b[1m";
static const char aclr_green[] = "\x1b[32m";
static const char aclr_blue[] = "\x1b[34m";
static const char aclr_magenta[] = "\x1b[35m";
static const char * tbnf_output_error_header(const struct tbnf_error_info * erri)
{
if (erri->eflags & TBNF_ERROR_CHILD)
return "exec error upon";
else if (erri->eflags & TBNF_ERROR_TOP_LEVEL)
return "error logged in";
else if (erri->eflags & TBNF_ERROR_NESTED)
return "< returned to >";
else
return "distorted state";
}
static const char * tbnf_output_strerror(
const struct tbnf_error_info * erri,
char (*errbuf)[256])
{
if (erri->eflags & TBNF_ERROR_CUSTOM)
return "flow error: unexpected condition or other";
else if (erri->eflags & TBNF_ERROR_NESTED)
return "";
else if (erri->eflags & TBNF_ERROR_CHILD)
return "(see child process error messages)";
else if (erri->esyscode == ENOBUFS)
return "input error: string length exceeds buffer size";
else if ((erri->esyscode == ENOENT) && erri->eany)
return "path not found: ";
else
return strerror_r(erri->esyscode,*errbuf,sizeof(*errbuf))
? "internal error: strerror_r(3) call failed"
: *errbuf;
}
static int tbnf_output_error_record_plain(
const struct tbnf_driver_ctx * dctx,
const struct tbnf_error_info * erri)
{
char errbuf[256];
int fderr = tbnf_driver_fderr(dctx);
const char * errdesc = tbnf_output_strerror(erri,&errbuf);
const char * path;
path = ((erri->esyscode == ENOENT) && erri->eany)
? erri->eany : "";
if (tbnf_dprintf(
fderr,
"%s: %s %s(), line %d%s%s%s.\n",
dctx->program,
tbnf_output_error_header(erri),
erri->efunction,
erri->eline,
strlen(errdesc) ? ": " : "",
errdesc,path) < 0)
return -1;
return 0;
}
static int tbnf_output_error_record_annotated(
const struct tbnf_driver_ctx * dctx,
const struct tbnf_error_info * erri)
{
char errbuf[256];
int fderr = tbnf_driver_fderr(dctx);
const char * errdesc = tbnf_output_strerror(erri,&errbuf);
const char * path;
path = ((erri->esyscode == ENOENT) && erri->eany)
? erri->eany : "";
if (tbnf_dprintf(
fderr,
"%s%s%s:%s %s%s%s %s%s%s()%s, %s%sline %d%s%s%s%s%s%s%s%s%s.\n",
aclr_bold,aclr_magenta,
dctx->program,
aclr_reset,
aclr_bold,
tbnf_output_error_header(erri),
aclr_reset,
aclr_bold,aclr_blue,
erri->efunction,
aclr_reset,
aclr_bold,aclr_green,
erri->eline,
aclr_reset,
strlen(errdesc) ? ": " : "",
aclr_bold,
errdesc,
aclr_reset,
aclr_bold,aclr_blue,
path,
aclr_reset) < 0)
return -1;
return 0;
}
int tbnf_output_error_record(
const struct tbnf_driver_ctx * dctx,
const struct tbnf_error_info * erri)
{
int fderr = tbnf_driver_fderr(dctx);
if (dctx->cctx->drvflags & TBNF_DRIVER_ANNOTATE_NEVER)
return tbnf_output_error_record_plain(dctx,erri);
else if (dctx->cctx->drvflags & TBNF_DRIVER_ANNOTATE_ALWAYS)
return tbnf_output_error_record_annotated(dctx,erri);
else if (isatty(fderr))
return tbnf_output_error_record_annotated(dctx,erri);
else
return tbnf_output_error_record_plain(dctx,erri);
}
static int tbnf_output_error_vector_plain(const struct tbnf_driver_ctx * dctx)
{
struct tbnf_error_info ** perr;
for (perr=dctx->errv; *perr; perr++)
if (tbnf_output_error_record_plain(dctx,*perr))
return -1;
return 0;
}
static int tbnf_output_error_vector_annotated(const struct tbnf_driver_ctx * dctx)
{
struct tbnf_error_info ** perr;
for (perr=dctx->errv; *perr; perr++)
if (tbnf_output_error_record_annotated(dctx,*perr))
return -1;
return 0;
}
int tbnf_output_error_vector(const struct tbnf_driver_ctx * dctx)
{
int fderr = tbnf_driver_fderr(dctx);
if (dctx->cctx->drvflags & TBNF_DRIVER_ANNOTATE_NEVER)
return tbnf_output_error_vector_plain(dctx);
else if (dctx->cctx->drvflags & TBNF_DRIVER_ANNOTATE_ALWAYS)
return tbnf_output_error_vector_annotated(dctx);
else if (isatty(fderr))
return tbnf_output_error_vector_annotated(dctx);
else
return tbnf_output_error_vector_plain(dctx);
}
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