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-rw-r--r--src/output/amgc_output_error.c212
1 files changed, 212 insertions, 0 deletions
diff --git a/src/output/amgc_output_error.c b/src/output/amgc_output_error.c
new file mode 100644
index 0000000..1706894
--- /dev/null
+++ b/src/output/amgc_output_error.c
@@ -0,0 +1,212 @@
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <apimagic/apimagic.h>
+
+static const char aclr_reset[] = "\x1b[0m";
+static const char aclr_bold[] = "\x1b[1m";
+
+static const char aclr_red[] = "\x1b[31m";
+static const char aclr_green[] = "\x1b[32m";
+static const char aclr_blue[] = "\x1b[34m";
+static const char aclr_magenta[] = "\x1b[35m";
+
+static const char const * const amgc_error_strings[AMGC_ERR_CAP] = {
+ [AMGC_ERR_FLOW_ERROR] = "flow error: unexpected condition or other",
+ [AMGC_ERR_FLEE_ERROR] = "flees and bugs and cats and mice",
+ [AMGC_ERR_NULL_CONTEXT] = "null driver or unit context",
+ [AMGC_ERR_NULL_SOURCE] = "source file does not define any data",
+ [AMGC_ERR_INVALID_CONTEXT] = "invalid driver or unit context",
+ [AMGC_ERR_INVALID_SOURCE] = "invalid source file",
+ [AMGC_ERR_SOURCE_SIZE_ZERO] = "cannot map an empty source file",
+};
+
+static const char * amgc_output_error_header(const struct amgc_error_info * erri)
+{
+ if (erri->eflags & AMGC_ERROR_CHILD)
+ return "exec error upon";
+
+ else if (erri->eflags & AMGC_ERROR_TOP_LEVEL)
+ return "error logged in";
+
+ else if (erri->eflags & AMGC_ERROR_NESTED)
+ return "< returned to >";
+
+ else
+ return "distorted state";
+}
+
+static const char * amgc_output_unit_header(const struct amgc_error_info * erri)
+{
+ if (!(erri->eflags & AMGC_ERROR_CUSTOM))
+ return "while opening";
+
+ else if (erri->elibcode == AMGC_ERR_SOURCE_SIZE_ZERO)
+ return "while mapping";
+
+ else
+ return "while parsing";
+}
+
+static const char * amgc_output_strerror(const struct amgc_error_info * erri)
+{
+ if (erri->eflags & AMGC_ERROR_CUSTOM)
+ return ((erri->elibcode < 0) || (erri->elibcode >= AMGC_ERR_CAP))
+ ? "internal error: please report to the maintainer"
+ : amgc_error_strings[erri->elibcode];
+
+ else if (erri->eflags & AMGC_ERROR_NESTED)
+ return "";
+
+ else if (erri->eflags & AMGC_ERROR_CHILD)
+ return "(see child process error messages)";
+
+ else if (erri->esyscode == ENOBUFS)
+ return "input error: string length exceeds buffer size.";
+
+ else
+ return strerror(erri->esyscode);
+}
+
+static int amgc_output_error_record_plain(
+ const struct amgc_driver_ctx * dctx,
+ const struct amgc_error_info * erri)
+{
+ const char * epath;
+ const char * errdesc = amgc_output_strerror(erri);
+
+ epath = erri->euctx
+ ? *erri->euctx->path
+ : erri->eunit;
+
+ if (epath && !(erri->eflags & AMGC_ERROR_NESTED))
+ if (fprintf(stderr,"%s: [%s] '%s':\n",
+ dctx->program,
+ amgc_output_unit_header(erri),
+ epath) < 0)
+ return -1;
+
+ if (fprintf(stderr,"%s: %s %s(), line %d%s%s.\n",
+ dctx->program,
+ amgc_output_error_header(erri),
+ erri->efunction,
+ erri->eline,
+ strlen(errdesc) ? ": " : "",
+ errdesc) < 0)
+ return -1;
+
+ return fflush(stderr);
+}
+
+static int amgc_output_error_record_annotated(
+ const struct amgc_driver_ctx * dctx,
+ const struct amgc_error_info * erri)
+{
+ const char * epath;
+ const char * errdesc = amgc_output_strerror(erri);
+
+ epath = erri->euctx
+ ? *erri->euctx->path
+ : erri->eunit;
+
+ if (epath && !(erri->eflags & AMGC_ERROR_NESTED))
+ if (fprintf(
+ stderr,
+ "%s%s%s:%s %s[%s]%s %s%s'%s'%s:\n",
+
+ aclr_bold,aclr_magenta,
+ dctx->program,
+ aclr_reset,
+
+ aclr_bold,
+ amgc_output_unit_header(erri),
+ aclr_reset,
+
+ aclr_bold,aclr_red,
+ epath,
+ aclr_reset) < 0)
+ return -1;
+
+ 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,
+ amgc_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,
+ amgc_output_strerror(erri),
+ aclr_reset) < 0)
+ return -1;
+
+ return fflush(stderr);
+}
+
+int amgc_output_error_record(
+ const struct amgc_driver_ctx * dctx,
+ const struct amgc_error_info * erri)
+{
+ if (dctx->cctx->drvflags & AMGC_DRIVER_ANNOTATE_NEVER)
+ return amgc_output_error_record_plain(dctx,erri);
+
+ else if (dctx->cctx->drvflags & AMGC_DRIVER_ANNOTATE_ALWAYS)
+ return amgc_output_error_record_annotated(dctx,erri);
+
+ else if (isatty(STDERR_FILENO))
+ return amgc_output_error_record_annotated(dctx,erri);
+
+ else
+ return amgc_output_error_record_plain(dctx,erri);
+}
+
+static int amgc_output_error_vector_plain(const struct amgc_driver_ctx * dctx)
+{
+ struct amgc_error_info ** perr;
+
+ for (perr=dctx->errv; *perr; perr++)
+ if (amgc_output_error_record_plain(dctx,*perr))
+ return -1;
+
+ return 0;
+}
+
+static int amgc_output_error_vector_annotated(const struct amgc_driver_ctx * dctx)
+{
+ struct amgc_error_info ** perr;
+
+ for (perr=dctx->errv; *perr; perr++)
+ if (amgc_output_error_record_annotated(dctx,*perr))
+ return -1;
+
+ return 0;
+}
+
+int amgc_output_error_vector(const struct amgc_driver_ctx * dctx)
+{
+ if (dctx->cctx->drvflags & AMGC_DRIVER_ANNOTATE_NEVER)
+ return amgc_output_error_vector_plain(dctx);
+
+ else if (dctx->cctx->drvflags & AMGC_DRIVER_ANNOTATE_ALWAYS)
+ return amgc_output_error_vector_annotated(dctx);
+
+ else if (isatty(STDERR_FILENO))
+ return amgc_output_error_vector_annotated(dctx);
+
+ else
+ return amgc_output_error_vector_plain(dctx);
+}