Re: [libvirt] [PATCH v3 19/20] Refactor qemuCapsParseDeviceStr to work from data tables

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Currently the qemuCapsParseDeviceStr method has a bunch of open coded string searches/comparisons to detect devices and their properties. Soon this data will be obtained from QMP queries instead of -device help output. Maintaining the list of device and properties in two places is undesirable. Thus the existing qemuCapsParseDeviceStr() method needs to be refactored to separate the device types and properties from the actual search code. Thus the -device help output is now parsed to construct a list of device names, and device properties. These are then checked against a set of datatables to set the capability flags Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/qemu/qemu_capabilities.c | 364 ++++++++++++++++++++++++++++++------------- src/qemu/qemu_capabilities.h | 3 +- tests/qemuhelptest.c | 2 +- 3 files changed, 259 insertions(+), 110 deletions(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 9c4f3be..c4d36f9 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -1233,6 +1233,262 @@ cleanup:

+qemuCapsParseDeviceStrObjectTypes(const char *str, + char ***types) +{ + const char *tmp = str; + int ret = -1; + size_t ntypelist = 0; + char **typelist = NULL; + + *types = NULL; + + while ((tmp = strstr(tmp, OBJECT_TYPE_PREFIX))) { + char *end; + tmp += strlen(OBJECT_TYPE_PREFIX); + end = strstr(tmp, "\""); + if (!end) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Malformed QEMU device list string, missing quote")); + goto cleanup; + } + + if (VIR_EXPAND_N(typelist, ntypelist, 1) < 0) { + virReportOOMError(); + goto cleanup; + } + if (!(typelist[ntypelist-1] = strndup(tmp, end-tmp))) { + virReportOOMError(); + goto cleanup; + } + } + + *types = typelist; + ret = ntypelist; + +cleanup: + return ret; +}

+ + +static int +qemuCapsParseDeviceStrObjectProps(const char *str, + const char *type, + char ***props) +{ + const char *tmp = str; + int ret = -1; + size_t nproplist = 0; + char **proplist = NULL; + + VIR_DEBUG("Extract type %s", type); + *props = NULL; + + while ((tmp = strchr(tmp, '\n'))) { + char *end; + tmp += 1; + + if (*tmp == '\0') + break; + + if (STRPREFIX(tmp, OBJECT_TYPE_PREFIX)) + continue; + + if (!STRPREFIX(tmp, type)) + continue; + + tmp += strlen(type); + if (*tmp != '.') + continue; + tmp++; + + end = strstr(tmp, "="); + if (!end) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Malformed QEMU device list string, missing '='")); + goto cleanup; + } + if (VIR_EXPAND_N(proplist, nproplist, 1) < 0) { + virReportOOMError(); + goto cleanup; + } + if (!(proplist[nproplist-1] = strndup(tmp, end-tmp))) { + virReportOOMError(); + goto cleanup; + } + } + + *props = proplist; + ret = nproplist; + +cleanup: + return ret; +}