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find var in array

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tg(x) 2011-10-30 16:04:54 +01:00
parent 47984a765b
commit 0a95b0a518
3 changed files with 79 additions and 1 deletions
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1
.gitignore vendored
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@ -1,4 +1,5 @@
lib/libpsyc.a
lib/libpsyc.so
doc/html
doc/latex
doc/man

20
include/psyc.h
View file

@ -31,6 +31,8 @@ typedef enum
{
PSYC_FALSE = 0,
PSYC_TRUE = 1,
PSYC_NO = 0,
PSYC_YES = 1,
} psycBool;
/**
@ -149,6 +151,24 @@ psycType psyc_getVarType(psycString *name);
*/
psycType psyc_getVarType2(const char *name, size_t len);
/**
* Search for a variable name in an array.
*
* @param array The array to search, should be ordered alphabetically.
* @param size Size of array.
* @param name Name of variable to look for.
* @param namelen Length of name.
* @param startswith If true, look for any variable starting with name,
otherwise only exact matches are returned.
* @param matching A temporary array used for keeping track of results.
* Should be the same size as the array we're searching.
*
* @return The value of the matched variable in the array.
*/
int psyc_findVar(const psycMatchVar *array, size_t size,
const char *name, size_t namelen,
uint8_t startswith, int8_t *matching);
/**
* Is this a list variable name?
*/

59
src/variable.c
View file

@ -120,7 +120,8 @@ psycType psyc_getVarType2(const char *name, size_t len)
{
if (matching[i] < 0)
break; // reached the end of possible matches
if (cursor < psyc_varTypes[matching[i]].name.length && psyc_varTypes[matching[i]].name.ptr[cursor] == name[cursor])
if (cursor < psyc_varTypes[matching[i]].name.length &&
psyc_varTypes[matching[i]].name.ptr[cursor] == name[cursor])
matching[m++] = matching[i]; // found a match, update matching indexes
else if (cursor == psyc_varTypes[matching[i]].name.length && name[cursor] == '_')
return psyc_varTypes[matching[0]].value; // _ after the end of a matching prefix
@ -142,3 +143,59 @@ psycType psyc_getVarType(psycString *name)
{
return psyc_getVarType2(name->ptr, name->length);
}
/**
* Search for a variable name in an array.
*
* @param array The array to search, should be ordered alphabetically.
* @param size Size of array.
* @param name Name of variable to look for.
* @param namelen Length of name.
* @param startswith If true, look for any variable starting with name,
otherwise only exact matches are returned.
* @param matching A temporary array used for keeping track of results.
* Should be the same size as the array we're searching.
*
* @return The value of the matched variable in the array.
*/
int psyc_findVar(const psycMatchVar *array, size_t size,
const char *name, size_t namelen,
uint8_t startswith, int8_t *matching)
{
size_t cursor = 1;
uint8_t i, m = 0;
//memset(&matching, -1, sizeof matching);
if (namelen < 2 || name[0] != '_')
return 0;
// first find the vars with matching length
for (i=0; i<size; i++)
if (namelen == array[i].name.length ||
(startswith && namelen > array[i].name.length &&
name[array[i].name.length] == '_'))
matching[m++] = i;
matching[m] = -1; // mark the end of matching indexes
while (cursor < namelen && matching[0] >= 0)
{
for (i = m = 0; i < size; i++)
{
if (matching[i] < 0)
break;
if (array[matching[i]].name.ptr[cursor] == name[cursor])
matching[m++] = matching[i]; // found a match, update matching indexes
else if (array[matching[i]].name.ptr[cursor] > name[cursor])
break; // passed the possible matches in alphabetical order
}
if (m < size)
matching[m] = -1; // mark the end of matching indexes
cursor++;
}
// return first match if found
return matching[0] >= 0 ? array[matching[0]].value : 0;
}