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Allow negative numbers in CSI codes

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Kovid Goyal
2021-01-21 07:06:43 +05:30
parent 7cea233de3
commit f9844ba3b0
6 changed files with 56 additions and 25 deletions
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56
kitty/parser.c
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@@ -22,10 +22,14 @@ static uint64_t pow10_array[] = {
1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, 10000000000
};
static inline uint64_t
utoi(uint32_t *buf, unsigned int sz) {
uint64_t ans = 0;
uint32_t *p = buf;
static inline int64_t
utoi(const uint32_t *buf, unsigned int sz) {
int64_t ans = 0;
const uint32_t *p = buf;
int mult = 1;
if (sz && *p == '-') {
mult = -1; p++; sz--;
}
// Ignore leading zeros
while(sz > 0) {
if (*p == '0') { p++; sz--; }
@@ -36,7 +40,7 @@ utoi(uint32_t *buf, unsigned int sz) {
ans += (p[i] - '0') * pow10_array[j];
}
}
return ans;
return ans * mult;
}
@@ -79,12 +83,12 @@ _report_error(PyObject *dump_callback, const char *fmt, ...) {
}
static void
_report_params(PyObject *dump_callback, const char *name, unsigned int *params, unsigned int count, Region *r) {
_report_params(PyObject *dump_callback, const char *name, int *params, unsigned int count, Region *r) {
static char buf[MAX_PARAMS*3] = {0};
unsigned int i, p=0;
if (r) p += snprintf(buf + p, sizeof(buf) - 2, "%u %u %u %u ", r->top, r->left, r->bottom, r->right);
for(i = 0; i < count && p < MAX_PARAMS*3-20; i++) {
int n = snprintf(buf + p, MAX_PARAMS*3 - p, "%u ", params[i]);
int n = snprintf(buf + p, MAX_PARAMS*3 - p, "%i ", params[i]);
if (n < 0) break;
p += n;
}
@@ -360,7 +364,8 @@ dispatch_osc(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
#define END_DISPATCH Py_CLEAR(string); } PyErr_Clear(); break; }
const unsigned int limit = screen->parser_buf_pos;
unsigned int code=0, i;
int code=0;
unsigned int i;
for (i = 0; i < MIN(limit, 5u); i++) {
if (screen->parser_buf[i] < '0' || screen->parser_buf[i] > '9') break;
}
@@ -460,12 +465,12 @@ static inline void
screen_tabn(Screen *s, unsigned int count) { for (index_type i=0; i < MAX(1u, count); i++) screen_tab(s); }
static inline const char*
repr_csi_params(unsigned int *params, unsigned int num_params) {
repr_csi_params(int *params, unsigned int num_params) {
if (!num_params) return "";
static char buf[256];
unsigned int pos = 0, i = 0;
while (pos < 200 && i++ < num_params && sizeof(buf) > pos + 1) {
const char *fmt = i < num_params ? "%u, " : "%u";
const char *fmt = i < num_params ? "%i, " : "%i";
int ret = snprintf(buf + pos, sizeof(buf) - pos - 1, fmt, params[i-1]);
if (ret < 0) return "An error occurred formatting the params array";
pos += ret;
@@ -478,7 +483,7 @@ repr_csi_params(unsigned int *params, unsigned int num_params) {
static
#endif
void
parse_sgr(Screen *screen, uint32_t *buf, unsigned int num, unsigned int *params, PyObject DUMP_UNUSED *dump_callback, const char *report_name DUMP_UNUSED, Region *region) {
parse_sgr(Screen *screen, uint32_t *buf, unsigned int num, int *params, PyObject DUMP_UNUSED *dump_callback, const char *report_name DUMP_UNUSED, Region *region) {
enum State { START, NORMAL, MULTIPLE, COLOR, COLOR1, COLOR3 };
enum State state = START;
unsigned int num_params, num_start, i;
@@ -606,7 +611,8 @@ parse_sgr(Screen *screen, uint32_t *buf, unsigned int num, unsigned int *params,
static inline unsigned int
parse_region(Region *r, uint32_t *buf, unsigned int num) {
unsigned int i, start, params[8] = {0}, num_params=0;
unsigned int i, start, num_params = 0;
int params[8] = {0};
for (i=0, start=0; i < num && num_params < 4; i++) {
switch(buf[i]) {
IS_DIGIT
@@ -646,10 +652,17 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
break; \
} \
}
#define NON_NEGATIVE_PARAM(x) { \
if (x < 0) { \
REPORT_ERROR("CSI code 0x%x is not allowed to have negative parameter (%d)", code, x); \
break; \
} \
}
#define CALL_CSI_HANDLER1(name, defval) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
REPORT_COMMAND(name, p1); \
name(screen, p1); \
break;
@@ -657,6 +670,7 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
#define CALL_CSI_HANDLER1P(name, defval, qch) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
private = start_modifier == qch; \
REPORT_COMMAND(name, p1, private); \
name(screen, p1, private); \
@@ -665,6 +679,7 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
#define CALL_CSI_HANDLER1S(name, defval) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
REPORT_COMMAND(name, p1, start_modifier); \
name(screen, p1, start_modifier); \
break;
@@ -672,13 +687,20 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
#define CALL_CSI_HANDLER1M(name, defval) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
REPORT_COMMAND(name, p1, end_modifier); \
name(screen, p1, end_modifier); \
break;
#define CALL_CSI_HANDLER2(name, defval1, defval2) \
if (num_params > 2) { \
REPORT_ERROR("CSI code 0x%x has %u > 2 parameters", code, num_params); \
break; \
} \
p1 = num_params > 0 ? params[0] : defval1; \
p2 = num_params > 1 ? params[1] : defval2; \
NON_NEGATIVE_PARAM(p1); \
NON_NEGATIVE_PARAM(p2); \
REPORT_COMMAND(name, p1, p2); \
name(screen, p1, p2); \
break;
@@ -701,8 +723,8 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
char start_modifier = 0, end_modifier = 0;
uint32_t *buf = screen->parser_buf, code = screen->parser_buf[screen->parser_buf_pos];
unsigned int num = screen->parser_buf_pos, start, i, num_params=0, p1, p2;
static unsigned int params[MAX_PARAMS] = {0};
unsigned int num = screen->parser_buf_pos, start, i, num_params=0;
static int params[MAX_PARAMS] = {0}, p1, p2;
bool private;
if (buf[0] == '>' || buf[0] == '<' || buf[0] == '?' || buf[0] == '!' || buf[0] == '=') {
start_modifier = (char)screen->parser_buf[0];
@@ -732,6 +754,12 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
switch(buf[i]) {
IS_DIGIT
break;
case '-':
if (i > start) {
REPORT_ERROR("CSI code can contain hyphens only at the start of numbers");
return;
}
break;
default:
if (i > start) params[num_params++] = utoi(buf + start, i - start);
else if (i == start && buf[i] == ';') params[num_params++] = 0;