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Fri, 01 Mar 2024 18:46:24 +0100 From: Sven Schnelle To: =?utf-8?q?Alex_Benn=C3=A9e?= , Alexandre Iooss , Mahmoud Mandour , Pierrick Bouvier Cc: qemu-devel@nongnu.org, deller@gmx.de, Sven Schnelle Subject: [PATCH v3 06/12] util/range: split up range_list_from_string() Date: Fri, 1 Mar 2024 18:46:03 +0100 Message-ID: <20240301174609.1964379-7-svens@stackframe.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240301174609.1964379-1-svens@stackframe.org> References: <20240301174609.1964379-1-svens@stackframe.org> MIME-Version: 1.0 Received-SPF: pass client-ip=23.83.223.95; envelope-from=svens@stackframe.org; helo=jackal.cherry.relay.mailchannels.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Makes the code a bit easier to read and maintain. Signed-off-by: Sven Schnelle --- util/range.c | 119 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 70 insertions(+), 49 deletions(-) diff --git a/util/range.c b/util/range.c index db535de9a7..8c463995e7 100644 --- a/util/range.c +++ b/util/range.c @@ -124,6 +124,74 @@ exit: *rev = out; } +static const char *split_single_range(const char *r, const char **r2) +{ + char *range_op; + + range_op = strstr(r, "-"); + if (range_op) { + *r2 = range_op + 1; + return range_op; + } + range_op = strstr(r, "+"); + if (range_op) { + *r2 = range_op + 1; + return range_op; + } + range_op = strstr(r, ".."); + if (range_op) { + *r2 = range_op + 2; + return range_op; + } + return NULL; +} + +static int parse_single_range(const char *r, Error **errp, + uint64_t *lob, uint64_t *upb) +{ + const char *range_op, *r2, *e; + uint64_t r1val, r2val; + + range_op = split_single_range(r, &r2); + if (!range_op) { + error_setg(errp, "Bad range specifier"); + return 1; + } + if (qemu_strtou64(r, &e, 0, &r1val) + || e != range_op) { + error_setg(errp, "Invalid number to the left of %.*s", + (int)(r2 - range_op), range_op); + return 1; + } + if (qemu_strtou64(r2, NULL, 0, &r2val)) { + error_setg(errp, "Invalid number to the right of %.*s", + (int)(r2 - range_op), range_op); + return 1; + } + + switch (*range_op) { + case '+': + *lob = r1val; + *upb = r1val + r2val - 1; + break; + case '-': + *upb = r1val; + *lob = r1val - (r2val - 1); + break; + case '.': + *lob = r1val; + *upb = r2val; + break; + default: + g_assert_not_reached(); + } + if (*lob > *upb) { + error_setg(errp, "Invalid range"); + return 1; + } + return 0; +} + void range_list_from_string(GList **out_ranges, const char *filter_spec, Error **errp) { @@ -136,60 +204,13 @@ void range_list_from_string(GList **out_ranges, const char *filter_spec, } for (i = 0; ranges[i]; i++) { - const char *r = ranges[i]; - const char *range_op, *r2, *e; - uint64_t r1val, r2val, lob, upb; - - range_op = strstr(r, "-"); - r2 = range_op ? range_op + 1 : NULL; - if (!range_op) { - range_op = strstr(r, "+"); - r2 = range_op ? range_op + 1 : NULL; - } - if (!range_op) { - range_op = strstr(r, ".."); - r2 = range_op ? range_op + 2 : NULL; - } - if (!range_op) { - error_setg(errp, "Bad range specifier"); - goto out; - } - - if (qemu_strtou64(r, &e, 0, &r1val) - || e != range_op) { - error_setg(errp, "Invalid number to the left of %.*s", - (int)(r2 - range_op), range_op); - goto out; - } - if (qemu_strtou64(r2, NULL, 0, &r2val)) { - error_setg(errp, "Invalid number to the right of %.*s", - (int)(r2 - range_op), range_op); - goto out; - } + uint64_t lob, upb; - switch (*range_op) { - case '+': - lob = r1val; - upb = r1val + r2val - 1; + if (parse_single_range(ranges[i], errp, &lob, &upb)) { break; - case '-': - upb = r1val; - lob = r1val - (r2val - 1); - break; - case '.': - lob = r1val; - upb = r2val; - break; - default: - g_assert_not_reached(); - } - if (lob > upb) { - error_setg(errp, "Invalid range"); - goto out; } *out_ranges = append_new_range(*out_ranges, lob, upb); } -out: g_strfreev(ranges); }