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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| #include "internal.h" | ||
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| // we assumed escapes can only be composed of 7-bit chars | ||
| typedef struct esctrie { | ||
| struct esctrie** trie; // if non-NULL, next level of radix-128 trie | ||
| ncinput ni; // composed key terminating here | ||
| } esctrie; | ||
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| uint32_t esctrie_id(const esctrie* e){ | ||
| return e->ni.id; | ||
| } | ||
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| void esctrie_ni(const esctrie* e, ncinput* ni){ | ||
| memcpy(ni, &e->ni, sizeof(*ni)); | ||
| } | ||
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| esctrie** esctrie_trie(esctrie* e){ | ||
| return e->trie; | ||
| } | ||
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| esctrie* create_esctrie_node(int special){ | ||
| esctrie* e = malloc(sizeof(*e)); | ||
| if(e){ | ||
| memset(e, 0, sizeof(*e)); | ||
| e->ni.id = special; | ||
| } | ||
| return e; | ||
| } | ||
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| void input_free_esctrie(esctrie** eptr){ | ||
| esctrie* e; | ||
| if( (e = *eptr) ){ | ||
| if(e->trie){ | ||
| int z; | ||
| for(z = 0 ; z < 0x80 ; ++z){ | ||
| if(e->trie[z]){ | ||
| input_free_esctrie(&e->trie[z]); | ||
| } | ||
| } | ||
| free(e->trie); | ||
| } | ||
| free(e); | ||
| } | ||
| } | ||
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| // multiple input escapes might map to the same input | ||
| int inputctx_add_input_escape(esctrie** eptr, const char* esc, uint32_t special, | ||
| unsigned shift, unsigned ctrl, unsigned alt){ | ||
| if(esc[0] != NCKEY_ESC || strlen(esc) < 2){ // assume ESC prefix + content | ||
| logerror("not an escape (0x%x)\n", special); | ||
| return -1; | ||
| } | ||
| if(*eptr == NULL){ | ||
| if((*eptr = create_esctrie_node(NCKEY_INVALID)) == NULL){ | ||
| return -1; | ||
| } | ||
| } | ||
| esctrie* cur = *eptr; | ||
| ++esc; // don't encode initial escape as a transition | ||
| do{ | ||
| int valid = *esc; | ||
| if(valid <= 0 || valid >= 0x80 || valid == NCKEY_ESC){ | ||
| logerror("invalid character %d in escape\n", valid); | ||
| return -1; | ||
| } | ||
| if(cur->trie == NULL){ | ||
| const size_t tsize = sizeof(cur->trie) * 0x80; | ||
| if((cur->trie = malloc(tsize)) == NULL){ | ||
| return -1; | ||
| } | ||
| memset(cur->trie, 0, tsize); | ||
| } | ||
| if(cur->trie[valid] == NULL){ | ||
| if((cur->trie[valid] = create_esctrie_node(NCKEY_INVALID)) == NULL){ | ||
| return -1; | ||
| } | ||
| } | ||
| cur = cur->trie[valid]; | ||
| ++esc; | ||
| }while(*esc); | ||
| // it appears that multiple keys can be mapped to the same escape string. as | ||
| // an example, see "kend" and "kc1" in st ("simple term" from suckless) :/. | ||
| if(cur->ni.id != NCKEY_INVALID){ // already had one here! | ||
| if(cur->ni.id != special){ | ||
| logwarn("already added escape (got 0x%x, wanted 0x%x)\n", cur->ni.id, special); | ||
| } | ||
| }else{ | ||
| cur->ni.id = special; | ||
| cur->ni.shift = shift; | ||
| cur->ni.ctrl = ctrl; | ||
| cur->ni.alt = alt; | ||
| } | ||
| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| #ifndef NOTCURSES_AUTOMATON | ||
| #define NOTCURSES_AUTOMATON | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
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| #include <stdint.h> | ||
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| struct ncinput; | ||
| struct esctrie; | ||
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| struct esctrie* create_esctrie_node(int special); | ||
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| void input_free_esctrie(struct esctrie** eptr); | ||
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| int inputctx_add_input_escape(struct esctrie** eptr, const char* esc, | ||
| uint32_t special, unsigned shift, | ||
| unsigned ctrl, unsigned alt); | ||
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| uint32_t esctrie_id(const struct esctrie* e); | ||
| void esctrie_ni(const struct esctrie* e, struct ncinput* ni); | ||
| // returns 128-way array of esctrie pointers | ||
| struct esctrie** esctrie_trie(struct esctrie* e); | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif |
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