diff options
Diffstat (limited to 'src/serdi.c')
| -rw-r--r-- | src/serdi.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/src/serdi.c b/src/serdi.c index 7568378d..116d311e 100644 --- a/src/serdi.c +++ b/src/serdi.c @@ -21,6 +21,9 @@ #include <stdlib.h> #include <string.h> +#define SERDI_ERROR(msg) fprintf(stderr, "serdi: " msg); +#define SERDI_ERRORF(fmt, ...) fprintf(stderr, "serdi: " fmt, __VA_ARGS__); + typedef struct { SerdEnv* env; SerdWriter* writer; @@ -41,6 +44,7 @@ static int print_usage(const char* name, bool error) { FILE* const os = error ? stderr : stdout; + fprintf(os, "%s", error ? "\n" : ""); fprintf(os, "Usage: %s [OPTION]... INPUT [BASE_URI]\n", name); fprintf(os, "Read and write RDF syntax.\n"); fprintf(os, "Use - for INPUT to read from standard input.\n\n"); @@ -68,17 +72,17 @@ set_syntax(SerdSyntax* syntax, const char* name) } else if (!strcmp(name, "ntriples")) { *syntax = SERD_NTRIPLES; } else { - fprintf(stderr, "Unknown input format `%s'\n", name); + SERDI_ERRORF("unknown syntax `%s'\n", name); return false; } return true; } static int -bad_arg(const char* name, char opt) +missing_arg(const char* name, char opt) { - fprintf(stderr, "%s: Bad or missing value for -%c\n", name, opt); - return 1; + SERDI_ERRORF("option requires an argument -- '%c'\n", opt); + return print_usage(name, true); } static SerdStatus @@ -133,36 +137,40 @@ main(int argc, char** argv) ++a; break; } else if (argv[a][1] == 'i') { - if (++a == argc || !set_syntax(&input_syntax, argv[a])) { - return bad_arg(argv[0], 'i'); + if (++a == argc) { + return missing_arg(argv[0], 'i'); + } else if (!set_syntax(&input_syntax, argv[a])) { + return print_usage(argv[0], true); } } else if (argv[a][1] == 'o') { - if (++a == argc || !set_syntax(&output_syntax, argv[a])) { - return bad_arg(argv[0], 'o'); + if (++a == argc) { + return missing_arg(argv[0], 'o'); + } else if (!set_syntax(&output_syntax, argv[a])) { + return print_usage(argv[0], true); } } else if (argv[a][1] == 'p') { if (++a == argc) { - return bad_arg(argv[0], 'p'); + return missing_arg(argv[0], 'p'); } add_prefix = (const uint8_t*)argv[a]; } else if (argv[a][1] == 'c') { if (++a == argc) { - return bad_arg(argv[0], 'c'); + return missing_arg(argv[0], 'c'); } chop_prefix = (const uint8_t*)argv[a]; } else if (argv[a][1] == 'r') { if (++a == argc) { - return bad_arg(argv[0], 'r'); + return missing_arg(argv[0], 'r'); } root_uri = (const uint8_t*)argv[a]; } else { - fprintf(stderr, "%s: Unknown option `%s'\n", argv[0], argv[a]); + SERDI_ERRORF("invalid option -- '%s'\n", argv[a] + 1); return print_usage(argv[0], true); } } if (a == argc) { - fprintf(stderr, "%s: Missing input\n", argv[0]); + SERDI_ERROR("missing input\n"); return 1; } |