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|
%% options
copyright owner = Dirk Krause
copyright year = 2017-xxxx
SPDX-License-Identifier: BSD-3-Clause
%% header
#ifdef __cplusplus
extern "C" {
#endif
/** Convert input line into key value pairs.
@param kvp Array of key value structures for results.
@param szp Size of array (in), used elements (out).
@param il Input line to process.
@param app Application structure for diagnostics, may be NULL.
@return 1 on success (number of elements in sz), 0 on error.
*/
int
dk3str_to_key_value(
dk3_key_value_t *kvp,
size_t *szp,
dkChar *il,
dk3_app_t *app
);
#ifdef __cplusplus
}
#endif
%% state machine
[options]
name = dk3strkv_stm
write header = no
[states]
ST_START # Waiting for anything to happen
ST_KEY # In a key
ST_EXPECT # Expect value
ST_VALUE # Having value
ST_SQ_EXPECT # Expect single quoted value
ST_DQ_EXPECT # Expect double quoted value
ST_SQ_VALUE # Having single quoted value
ST_DQ_VALUE # Having double quoted value
ST_ERROR # Error occured
[inputs]
I_OT # Any other character
I_WH # White space
I_SQ # Single quote
I_DQ # Double quote
I_BS # Backslash
I_EQ # Equal sign
[output]
O_ERROR # Error occured
O_NO # Do nothing
O_SQ # Squeeze
O_SKEY # Start key
O_ENDKEY # End key string (change to finalizer)
O_ENDCOUNT # End key string and count upwards
O_ENDVAL # End value string (change to finalizer)
O_SVAL # Start value
O_SQ_SVAL # Squeeze and start value
O_SEVAL # Start and end value
[rules]
* * ST_ERROR O_ERROR
ST_START I_WH ST_START O_NO
ST_START I_OT ST_KEY O_SKEY
ST_KEY * ST_KEY O_NO
ST_KEY I_WH ST_START O_ENDCOUNT
ST_KEY I_EQ ST_EXPECT O_ENDKEY
ST_EXPECT I_WH ST_EXPECT O_NO
ST_EXPECT * ST_VALUE O_SVAL
ST_EXPECT I_BS ST_VALUE O_SQ_SVAL
ST_EXPECT I_SQ ST_SQ_EXPECT O_NO
ST_EXPECT I_DQ ST_DQ_EXPECT O_NO
ST_VALUE * ST_VALUE O_NO
ST_VALUE I_BS ST_VALUE O_SQ
ST_VALUE I_WH ST_START O_ENDVAL
ST_SQ_EXPECT * ST_SQ_VALUE O_SVAL
ST_SQ_EXPECT I_BS ST_SQ_VALUE O_SQ_SVAL
ST_SQ_EXPECT I_SQ ST_START O_SEVAL
ST_SQ_VALUE * ST_SQ_VALUE O_NO
ST_SQ_VALUE I_SQ ST_START O_ENDVAL
ST_SQ_VALUE I_BS ST_SQ_VALUE O_SQ
ST_DQ_EXPECT * ST_DQ_VALUE O_SVAL
ST_DQ_EXPECT I_BS ST_DQ_VALUE O_SQ_SVAL
ST_DQ_EXPECT I_DQ ST_START O_SEVAL
ST_DQ_VALUE * ST_DQ_VALUE O_NO
ST_DQ_VALUE I_BS ST_DQ_VALUE O_SQ
ST_DQ_VALUE I_DQ ST_START O_ENDVAL
%% module
#include "dk3all.h"
#include "dk3strkv.h"
/** Classify input character
@param c Character to classify.
@return Character class.
*/
static
int
dk3strkv_classify(dkChar c)
{
int back = I_OT;
$? "+ dk3strkv_classify %d", (int)c
switch(c) {
case dkT(' '): case dkT('\t'): {
back = I_WH;
} break;
case dkT('"'): {
back = I_DQ;
} break;
case dkT('\''): {
back = I_SQ;
} break;
case dkT('\\'): {
back = I_BS;
} break;
case dkT('='): {
back = I_EQ;
} break;
} $? "- dk3strkv_classify %d", back
return back;
}
/** Empty line.
*/
static dkChar const dk3strkv_empty_line[] = { dkT("") };
/** Report error for unexpected end of text.
@param app Application structure for diagnostics, may be NULL.
@param il Input line to complain about.
*/
static
void
dk3strkv_error_unexpected_eot(dk3_app_t *app, dkChar *il)
{
dkChar const *ptr;
if(app) {
ptr = il;
if(!(ptr)) { ptr = dk3strkv_empty_line; }
dk3app_log_i3(app, DK3_LL_ERROR, 389, 390, ptr);
}
}
/** Report error, too many key value items.
@param app Application structure for diagnostics, may be NULL.
@param il Input line to complain about.
@param pos Position in line.
*/
static
void
dk3strkv_error_too_many(dk3_app_t *app, dkChar *il, unsigned long pos)
{
dkChar buffer[64];
dkChar const *ptr;
if(app) {
ptr = il;
if(!(ptr)) { ptr = dk3strkv_empty_line; }
#if VERSION_BEFORE_20140716
dk3sf_sprintf3(buffer, dkT("%lu"), pos);
dk3app_log_i5(app, DK3_LL_ERROR, 386, 387, 388, buffer, ptr);
#else
if (dk3ma_um_to_string(buffer, DK3_SIZEOF(buffer, dkChar), (dk3_um_t)pos)) {
dk3app_log_i5(app, DK3_LL_ERROR, 386, 387, 388, buffer, ptr);
}
#endif
}
}
int
dk3str_to_key_value(
dk3_key_value_t *kvp,
size_t *szp,
dkChar *il,
dk3_app_t *app
)
{
dkChar *ptr; /* Traverse string. */
dkChar *mycopy; /* Private copy for diagnostics. */
unsigned long charno; /* Character number. */
size_t i; /* Current key value pair index. */
int icl; /* Input class. */
int act; /* Action to take. */
int stm; /* State machine. */
int cc; /* Flag: Can continue. */
int rtm = 0; /* Reported too many. */
int error = 0; /* Flag: Have error. */
int back = 0;
$? "+ dk3str_to_key_value \"%!ds\"", il
if((kvp) && (szp)) {
for(i = 0; i < *szp; i++) { kvp[i].key = NULL; kvp[i].val = NULL; }
}
if((kvp) && (szp) && (il)) {
if(*szp) {
mycopy = dk3str_dup_app(il, app);
i = 0;
ptr = il; cc = 1; charno = 1UL;
dk3strkv_stm_reset(&stm);
while(cc) {
if(*ptr) { $? ". begin of loop \"%!ds\"", ptr
icl = dk3strkv_classify(*ptr); $? ". icl = %d", icl
act = dk3strkv_stm_step(&stm, icl); $? ". act = %d", act
switch(act) {
case O_ERROR: { $? ". error"
error = 1;
} break;
case O_SQ: { $? ". O_SQ"
dk3str_cpy(ptr, &(ptr[1]));
if(*ptr) {
charno++;
} else {
cc = 0;
error = 1;
dk3strkv_error_unexpected_eot(app, mycopy);
}
} break;
case O_SKEY: { $? ". O_SKEY"
if(i < (*szp)) {
kvp[i].key = ptr;
} else {
error = 1;
if(0 == rtm) {
rtm = 1;
dk3strkv_error_too_many(app, mycopy, charno);
}
}
} break;
case O_ENDKEY: { $? ". O_ENDKEY"
*ptr = dkT('\0');
} break;
case O_ENDCOUNT: { $? ". O_ENDCOUNT"
*ptr = dkT('\0');
i++;
} break;
case O_ENDVAL: { $? ". O_ENDVAL"
*ptr = dkT('\0');
i++;
} break;
case O_SVAL: { $? ". O_SVAL"
if(i < (*szp)) {
kvp[i].val = ptr;
} else {
error = 1;
if(0 == rtm) {
rtm = 1;
dk3strkv_error_too_many(app, mycopy, charno);
}
}
} break;
case O_SQ_SVAL: { $? ". O_SQ_SVAL"
dk3str_cpy(ptr, &(ptr[1]));
if(*ptr) {
charno++;
if(i < (*szp)) {
kvp[i].val = ptr;
} else {
error = 1;
if(0 == rtm) {
rtm = 1;
dk3strkv_error_too_many(app, mycopy, charno);
}
}
} else {
cc = 0;
error = 1;
dk3strkv_error_unexpected_eot(app, mycopy);
}
} break;
case O_SEVAL: { $? ". O_SEVAL"
*ptr = dkT('\0');
if(i < (*szp)) {
kvp[i].val = ptr;
i++;
} else {
error = 1;
if(0 == rtm) {
rtm = 1;
dk3strkv_error_too_many(app, mycopy, charno);
}
}
} break;
}
ptr++;
charno++;
} else {
cc = 0;
}
}
switch(stm) {
case ST_START: { $? ". nothing to finish"
if(0 == error) {
back = 1;
*szp = i;
}
} break;
case ST_KEY: { $? ". finish key"
if(0 == error) {
i++;
back = 1;
*szp = i;
}
} break;
case ST_VALUE: { $? ". finish value"
if(0 == error) {
i++;
back = 1;
*szp = i;
}
} break;
}
dk3_release(mycopy);
}
} else {
if((kvp) && (szp) && (!(il))) {
*szp = 0;
back = 1;
}
} $? "- dk3str_to_key_value %d", back
return back;
}
|