diff options
Diffstat (limited to 'src/output')
| -rw-r--r-- | src/output/mdso_output_error.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/output/mdso_output_error.c b/src/output/mdso_output_error.c new file mode 100644 index 0000000..fd94592 --- /dev/null +++ b/src/output/mdso_output_error.c @@ -0,0 +1,158 @@ +/****************************************************************/ +/* mdso: midipix dso scavenger */ +/* Copyright (C) 2015--2016 Z. Gilboa */ +/* Released under GPLv2 and GPLv3; see COPYING.MDSO. */ +/****************************************************************/ + +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <mdso/mdso.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 * mdso_output_error_header(const struct mdso_error_info * erri) +{ + if (erri->flags & MDSO_ERROR_CHILD) + return "exec error upon"; + + else if (erri->flags & MDSO_ERROR_TOP_LEVEL) + return "error logged in"; + + else if (erri->flags & MDSO_ERROR_NESTED) + return "< returned to >"; + + else + return "distorted state"; +} + +static const char * mdso_output_strerror(const struct mdso_error_info * erri) +{ + if (erri->flags & MDSO_ERROR_CUSTOM) + return "flow error: unexpected condition or other."; + + else if (erri->flags & MDSO_ERROR_NESTED) + return ""; + + else if (erri->flags & MDSO_ERROR_CHILD) + return "(see child process error messages)"; + + else if (erri->syserror == ENOBUFS) + return "input error: string length exceeds buffer size."; + + else + return strerror(erri->syserror); +} + +static int mdso_output_error_record_plain( + const struct mdso_driver_ctx * dctx, + const struct mdso_error_info * erri) +{ + const char * errdesc = mdso_output_strerror(erri); + + if (fprintf(stderr,"%s: %s %s(), line %d%s%s.\n", + dctx->program, + mdso_output_error_header(erri), + erri->function, + erri->line, + strlen(errdesc) ? ": " : "", + errdesc) < 0) + return -1; + + return fflush(stderr); +} + +static int mdso_output_error_record_annotated( + const struct mdso_driver_ctx * dctx, + const struct mdso_error_info * erri) +{ + const char * errdesc = mdso_output_strerror(erri); + + if (fprintf( + stderr, + "%s%s%s:%s %s%s%s %s%s%s()%s, %s%sline %d%s%s%s%s%s.\n", + + aclr_bold,aclr_magenta, + dctx->program, + aclr_reset, + + aclr_bold, + mdso_output_error_header(erri), + aclr_reset, + + aclr_bold,aclr_blue, + erri->function, + aclr_reset, + + aclr_bold,aclr_green, + erri->line, + aclr_reset, + strlen(errdesc) ? ": " : "", + + aclr_bold, + mdso_output_strerror(erri), + aclr_reset) < 0) + return -1; + + return fflush(stderr); +} + +int mdso_output_error_record( + const struct mdso_driver_ctx * dctx, + const struct mdso_error_info * erri) +{ + if (dctx->cctx->drvflags & MDSO_DRIVER_ANNOTATE_NEVER) + return mdso_output_error_record_plain(dctx,erri); + + else if (dctx->cctx->drvflags & MDSO_DRIVER_ANNOTATE_ALWAYS) + return mdso_output_error_record_annotated(dctx,erri); + + else if (isatty(STDERR_FILENO)) + return mdso_output_error_record_annotated(dctx,erri); + + else + return mdso_output_error_record_plain(dctx,erri); +} + +static int mdso_output_error_vector_plain(const struct mdso_driver_ctx * dctx) +{ + struct mdso_error_info ** perr; + + for (perr=dctx->errv; *perr; perr++) + if (mdso_output_error_record_plain(dctx,*perr)) + return -1; + + return 0; +} + +static int mdso_output_error_vector_annotated(const struct mdso_driver_ctx * dctx) +{ + struct mdso_error_info ** perr; + + for (perr=dctx->errv; *perr; perr++) + if (mdso_output_error_record_annotated(dctx,*perr)) + return -1; + + return 0; +} + +int mdso_output_error_vector(const struct mdso_driver_ctx * dctx) +{ + if (dctx->cctx->drvflags & MDSO_DRIVER_ANNOTATE_NEVER) + return mdso_output_error_vector_plain(dctx); + + else if (dctx->cctx->drvflags & MDSO_DRIVER_ANNOTATE_ALWAYS) + return mdso_output_error_vector_annotated(dctx); + + else if (isatty(STDERR_FILENO)) + return mdso_output_error_vector_annotated(dctx); + + else + return mdso_output_error_vector_plain(dctx); +} |