diff options
Diffstat (limited to 'src/qapi/string-input-visitor.c')
| -rw-r--r-- | src/qapi/string-input-visitor.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/src/qapi/string-input-visitor.c b/src/qapi/string-input-visitor.c new file mode 100644 index 0000000..bbd6a54 --- /dev/null +++ b/src/qapi/string-input-visitor.c @@ -0,0 +1,347 @@ +/* + * String parsing visitor + * + * Copyright Red Hat, Inc. 2012 + * + * Author: Paolo Bonzini <pbonzini@redhat.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#include "qemu-common.h" +#include "qapi/string-input-visitor.h" +#include "qapi/visitor-impl.h" +#include "qapi/qmp/qerror.h" +#include "qemu/option.h" +#include "qemu/queue.h" +#include "qemu/range.h" + + +struct StringInputVisitor +{ + Visitor visitor; + + bool head; + + GList *ranges; + GList *cur_range; + int64_t cur; + + const char *string; +}; + +static void free_range(void *range, void *dummy) +{ + g_free(range); +} + +static void parse_str(StringInputVisitor *siv, Error **errp) +{ + char *str = (char *) siv->string; + long long start, end; + Range *cur; + char *endptr; + + if (siv->ranges) { + return; + } + + do { + errno = 0; + start = strtoll(str, &endptr, 0); + if (errno == 0 && endptr > str) { + if (*endptr == '\0') { + cur = g_malloc0(sizeof(*cur)); + cur->begin = start; + cur->end = start + 1; + siv->ranges = g_list_insert_sorted_merged(siv->ranges, cur, + range_compare); + cur = NULL; + str = NULL; + } else if (*endptr == '-') { + str = endptr + 1; + errno = 0; + end = strtoll(str, &endptr, 0); + if (errno == 0 && endptr > str && start <= end && + (start > INT64_MAX - 65536 || + end < start + 65536)) { + if (*endptr == '\0') { + cur = g_malloc0(sizeof(*cur)); + cur->begin = start; + cur->end = end + 1; + siv->ranges = + g_list_insert_sorted_merged(siv->ranges, + cur, + range_compare); + cur = NULL; + str = NULL; + } else if (*endptr == ',') { + str = endptr + 1; + cur = g_malloc0(sizeof(*cur)); + cur->begin = start; + cur->end = end + 1; + siv->ranges = + g_list_insert_sorted_merged(siv->ranges, + cur, + range_compare); + cur = NULL; + } else { + goto error; + } + } else { + goto error; + } + } else if (*endptr == ',') { + str = endptr + 1; + cur = g_malloc0(sizeof(*cur)); + cur->begin = start; + cur->end = start + 1; + siv->ranges = g_list_insert_sorted_merged(siv->ranges, + cur, + range_compare); + cur = NULL; + } else { + goto error; + } + } else { + goto error; + } + } while (str); + + return; +error: + g_list_foreach(siv->ranges, free_range, NULL); + g_list_free(siv->ranges); + siv->ranges = NULL; +} + +static void +start_list(Visitor *v, const char *name, Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + + parse_str(siv, errp); + + siv->cur_range = g_list_first(siv->ranges); + if (siv->cur_range) { + Range *r = siv->cur_range->data; + if (r) { + siv->cur = r->begin; + } + } +} + +static GenericList * +next_list(Visitor *v, GenericList **list, Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + GenericList **link; + Range *r; + + if (!siv->ranges || !siv->cur_range) { + return NULL; + } + + r = siv->cur_range->data; + if (!r) { + return NULL; + } + + if (siv->cur < r->begin || siv->cur >= r->end) { + siv->cur_range = g_list_next(siv->cur_range); + if (!siv->cur_range) { + return NULL; + } + r = siv->cur_range->data; + if (!r) { + return NULL; + } + siv->cur = r->begin; + } + + if (siv->head) { + link = list; + siv->head = false; + } else { + link = &(*list)->next; + } + + *link = g_malloc0(sizeof **link); + return *link; +} + +static void +end_list(Visitor *v, Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + siv->head = true; +} + +static void parse_type_int(Visitor *v, int64_t *obj, const char *name, + Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + + if (!siv->string) { + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", + "integer"); + return; + } + + parse_str(siv, errp); + + if (!siv->ranges) { + goto error; + } + + if (!siv->cur_range) { + Range *r; + + siv->cur_range = g_list_first(siv->ranges); + if (!siv->cur_range) { + goto error; + } + + r = siv->cur_range->data; + if (!r) { + goto error; + } + + siv->cur = r->begin; + } + + *obj = siv->cur; + siv->cur++; + return; + +error: + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, + "an int64 value or range"); +} + +static void parse_type_size(Visitor *v, uint64_t *obj, const char *name, + Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + Error *err = NULL; + uint64_t val; + + if (siv->string) { + parse_option_size(name, siv->string, &val, &err); + } else { + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", + "size"); + return; + } + if (err) { + error_propagate(errp, err); + return; + } + + *obj = val; +} + +static void parse_type_bool(Visitor *v, bool *obj, const char *name, + Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + + if (siv->string) { + if (!strcasecmp(siv->string, "on") || + !strcasecmp(siv->string, "yes") || + !strcasecmp(siv->string, "true")) { + *obj = true; + return; + } + if (!strcasecmp(siv->string, "off") || + !strcasecmp(siv->string, "no") || + !strcasecmp(siv->string, "false")) { + *obj = false; + return; + } + } + + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", + "boolean"); +} + +static void parse_type_str(Visitor *v, char **obj, const char *name, + Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + if (siv->string) { + *obj = g_strdup(siv->string); + } else { + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", + "string"); + } +} + +static void parse_type_number(Visitor *v, double *obj, const char *name, + Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + char *endp = (char *) siv->string; + double val; + + errno = 0; + if (siv->string) { + val = strtod(siv->string, &endp); + } + if (!siv->string || errno || endp == siv->string || *endp) { + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", + "number"); + return; + } + + *obj = val; +} + +static void parse_optional(Visitor *v, bool *present, const char *name, + Error **errp) +{ + StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v); + + if (!siv->string) { + *present = false; + return; + } + + *present = true; +} + +Visitor *string_input_get_visitor(StringInputVisitor *v) +{ + return &v->visitor; +} + +void string_input_visitor_cleanup(StringInputVisitor *v) +{ + g_list_foreach(v->ranges, free_range, NULL); + g_list_free(v->ranges); + g_free(v); +} + +StringInputVisitor *string_input_visitor_new(const char *str) +{ + StringInputVisitor *v; + + v = g_malloc0(sizeof(*v)); + + v->visitor.type_enum = input_type_enum; + v->visitor.type_int = parse_type_int; + v->visitor.type_size = parse_type_size; + v->visitor.type_bool = parse_type_bool; + v->visitor.type_str = parse_type_str; + v->visitor.type_number = parse_type_number; + v->visitor.start_list = start_list; + v->visitor.next_list = next_list; + v->visitor.end_list = end_list; + v->visitor.optional = parse_optional; + + v->string = str; + v->head = true; + return v; +} |
