diff options
Diffstat (limited to 'src/opt.c')
| -rw-r--r-- | src/opt.c | 40 |
1 files changed, 38 insertions, 2 deletions
@@ -70,6 +70,7 @@ enum { * %HXOPT_E_LONG_MISSING: long option requires an argument * %HXOPT_E_SHORT_UNKNOWN: unknown short option * %HXOPT_E_SHORT_MISSING: short option requires an argument + * %HXOPT_E_AMBIG_PREFIX: used abbreviated long option but had multiple results */ enum { HXOPT_E_LONG_UNKNOWN = 1, @@ -77,6 +78,7 @@ enum { HXOPT_E_LONG_MISSING, HXOPT_E_SHORT_UNKNOWN, HXOPT_E_SHORT_MISSING, + HXOPT_E_AMBIG_PREFIX, }; /** @@ -127,6 +129,8 @@ struct HX_getopt_vars { unsigned int flags; }; +struct HXoption HXopt_ambig_prefix; + static bool posix_me_harder(void) { const char *s; @@ -241,6 +245,27 @@ lookup_short(const struct HXoption *table, char opt) return NULL; } +static const struct HXoption * +lookup_long_pfx(const struct HXoption *table, const char *key) +{ + const struct HXoption *cand = NULL; + size_t klen = strlen(key); + + for (; table->type != HXTYPE_XSNTMARK; ++table) { + if (table->ln == NULL) + continue; + if (strncmp(table->ln, key, klen) != 0) + continue; + /* Prefix match */ + if (table->ln[klen] == '\0') + return table; /* Exact match */ + if (cand != NULL) + return &HXopt_ambig_prefix; + cand = table; + } + return cand; +} + static __inline__ const struct HXoption * lookup_long(const struct HXoption *table, const char *key) { @@ -462,6 +487,10 @@ static int HX_getopt_error(int err, const char *key, unsigned int flags) fprintf(stderr, "Option -%c requires an " "argument\n", *key); return HXOPT_I_ERROR | HXOPT_ERR_MIS; + case HXOPT_E_AMBIG_PREFIX: + if (!(flags & HXOPT_QUIET)) + fprintf(stderr, "Option %s is ambiguous\n", key); + return HXOPT_I_ERROR | HXOPT_ERR_AMBIG; } return HXOPT_I_ERROR; } @@ -471,7 +500,9 @@ static int HX_getopt_twolong(const char *const *opt, { const char *key = opt[0], *value = opt[1]; - par->cbi.current = lookup_long(par->cbi.table, key + 2); + par->cbi.current = lookup_long_pfx(par->cbi.table, key + 2); + if (par->cbi.current == &HXopt_ambig_prefix) + return HX_getopt_error(HXOPT_E_AMBIG_PREFIX, key, par->flags); if (par->cbi.current == NULL) { if (par->flags & HXOPT_PTHRU) { char *tmp = HX_strdup(key); @@ -521,7 +552,12 @@ static int HX_getopt_long(const char *cur, struct HX_getopt_vars *par) value = strchr(key, '='); *value++ = '\0'; - par->cbi.current = lookup_long(par->cbi.table, key + 2); + par->cbi.current = lookup_long_pfx(par->cbi.table, key + 2); + if (par->cbi.current == &HXopt_ambig_prefix) { + ret = HX_getopt_error(HXOPT_E_AMBIG_PREFIX, key, par->flags); + free(key); + return ret; + } if (par->cbi.current == NULL) { if (par->flags & HXOPT_PTHRU) { /* Undo nuke of '=' and reuse alloc */ |