omicron
af66790cff
- Exposes all errors in the header file so any user of the api can test for the specific error conditions - Mark all static error pointers as const - Move generic errors into error.h - Name all errors err_modulename_* for errors that belong to a specific module and err_* for generic errors.
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#include "error.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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error_t *const err_errorf_alloc = &(error_t){
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.message = "Allocation failed during formatting of another error"};
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error_t *const err_errorf_length = &(error_t){
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.message =
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"Formatting of another error failed to determine the error length"};
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error_t *const err_eof =
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&(error_t){.message = "Read failed because EOF is reached"};
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error_t *const err_unknown_read_failure =
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&(error_t){.message = "Unknown read error"};
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error_t *const err_allocation_failed =
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&(error_t){.message = "Memory allocation failed"};
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error_t *errorf(const char *fmt, ...) {
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error_t *err = calloc(1, sizeof(error_t));
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if (err == nullptr)
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return err_errorf_alloc;
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va_list args;
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va_list args_count;
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va_start(args, fmt);
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va_copy(args_count, args);
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int size = vsnprintf(nullptr, 0, fmt, args_count) + 1;
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va_end(args_count);
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if (size <= 0) {
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free(err);
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va_end(args);
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return err_errorf_length;
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}
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err->message = malloc(size);
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if (err->message == nullptr) {
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free(err);
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va_end(args);
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return err_errorf_alloc;
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}
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vsnprintf(err->message, size, fmt, args);
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va_end(args);
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err->is_heap_allocated = true;
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return err;
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}
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