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syntax.c
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syntax.c
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/*
* Copyright (c) 2020 Joris Vink <joris@coders.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ce.h"
#define SYNTAX_CLEAR_COMMENT 0x0001
struct state {
const u_int8_t *p;
size_t len;
size_t off;
size_t col;
size_t avail;
int r;
int g;
int b;
int bold;
int dirty;
int highlight;
int selection;
int keepcolor;
int diffcolor;
int stringcolor;
int inside_string;
int inside_comment;
const u_int8_t *ppword;
size_t ppwlen;
int inside_preproc;
struct cebuf *buf;
size_t index;
int color;
u_int32_t flags;
};
static void syntax_write(struct state *, size_t);
static void syntax_term_write(struct state *, const void *, size_t, int);
static int syntax_escaped_quote(struct state *);
static int syntax_is_word(struct state *, size_t);
static void syntax_state_selection(struct state *);
static void syntax_state_term_reset(struct state *);
static void syntax_state_term_highlight(struct state *);
static void syntax_state_term_bold(struct state *, int);
static void syntax_state_foreground_color(struct state *, int, int, int);
static void syntax_state_color(struct state *, int);
static void syntax_state_color_clear(struct state *);
static void syntax_highlight_js(struct state *);
static void syntax_highlight_diff(struct state *);
static void syntax_highlight_shell(struct state *);
static int syntax_highlight_shell_variable(struct state *);
static void syntax_highlight_c(struct state *);
static int syntax_highlight_c_label(struct state *);
static int syntax_highlight_c_comment(struct state *);
static int syntax_highlight_c_preproc(struct state *);
static void syntax_highlight_zig(struct state *);
static void syntax_highlight_lua(struct state *);
static int syntax_highlight_lua_comment(struct state *);
static void syntax_highlight_go(struct state *);
static void syntax_highlight_yaml(struct state *);
static void syntax_highlight_swift(struct state *);
static void syntax_highlight_latex(struct state *);
static void syntax_highlight_dirlist(struct state *);
static void syntax_highlight_python(struct state *);
static int syntax_highlight_python_decorator(struct state *);
static int syntax_highlight_python_multiline_string(struct state *);
static int syntax_highlight_string(struct state *);
static int syntax_highlight_numeric(struct state *);
static void syntax_highlight_format_string(struct state *);
static int syntax_highlight_pound_comment(struct state *);
static int syntax_highlight_word(struct state *, const char *[]);
static void syntax_highlight_span(struct state *, char, char, int);
static const char *tags[] = {
"XXX",
"TODO",
NULL
};
static const char *lua_kw[] = {
"and", "break", "do", "else", "elseif",
"end", "false", "for", "function", "if",
"in", "local", "nil", "not", "or",
"repeat", "return", "then", "true", "until", "while",
NULL
};
static const char *c_kw[] = {
"if", "do", "for", "else", "while", "return", "sizeof",
"case", "switch", "default", "break", "goto", "continue",
NULL
};
static const char *c_type[] = {
"int", "char", "short", "long", "double", "float", "size_t",
"ssize_t", "const", "struct", "static", "unsigned", "void",
"uint8_t", "uint16_t", "uint32_t", "uint64_t",
"int8_t", "int16_t", "int32_t", "int64_t",
"u_int8_t", "u_int16_t", "u_int32_t", "u_int64_t",
"extern", "volatile", "sig_atomic_t", "time_t", "FILE",
"enum", "union", "va_list", "bool", "inline", "typedef",
NULL
};
static const char *c_special[] = {
"NULL", "__file__", "__func__", "__LINE__",
"SIGHUP", "SIGINT", "SIGQUIT", "SIGILL",
"SIGABRT", "SIGFPE", "SIGKILL", "SIGSEGV",
"SIGPIPE", "SIGALRM", "SIGTERM", "SIGUSR1",
"SIGUSR2", "SIGCHLD", "SIGCONT", "SIGSTOP",
"SIGTSTP", "SIGTTIN", "SIGTTOU", "SIGBUS",
"SIGPOLL", "SIGPROF", "SIGSYS", "SIGTRAP",
"SIGURG", "SIGVTALRM", "SIGXCPU", "SIGXFSZ",
NULL
};
static const char *py_kw[] = {
"and", "del", "for", "is", "raise", "assert", "elif",
"lambda", "return", "break", "else", "global", "not", "try",
"class", "except", "if", "or", "while", "continue", "exec",
"pass", "def", "finally", "in", "await", "async", "as",
NULL
};
static const char *py_types[] = {
"None", "False", "True", "print",
"abs", "delattr", "hash", "memoryview", "set",
"all", "dict", "help", "min", "setattr",
"any", "dir", "hex", "next", "slice",
"ascii", "divmod", "id", "object", "sorted",
"bin", "enumerate", "input", "oct", "staticmethod",
"bool", "eval", "int", "open", "str",
"breakpoint", "exec", "isinstance", "ord", "sum",
"bytearray", "filter", "issubclass", "pow", "super",
"bytes", "float", "iter", "print", "tuple",
"chr", "frozenset", "list", "range", "vars",
"classmethod", "getattr", "locals", "repr", "zip",
"compile", "globals", "map", "reversed", "__import__",
"complex", "hasattr", "max", "round", "len",
NULL
};
static const char *py_special[] = {
"import", "from", NULL
};
static const char *swift_kw[] = {
"associatedtype", "class", "deinit", "enum", "extension",
"fileprivate", "func", "import", "init", "inout", "internal",
"let", "open", "operator", "private", "protocol", "public",
"rethrows", "static", "struct", "subscript", "typealias", "var",
"break", "case", "continue", "default", "defer", "do", "else",
"fallthrough", "for", "guard", "if", "in", "repeat", "return",
"switch", "where", "while",
"as", "Any", "catch", "false", "is", "nil", "super", "self",
"Self", "throw", "throws", "true", "try",
"_",
"#available", "#colorLiteral", "#column", "#else", "#elseif",
"#endif", "#error", "#file", "#fileID", "#fileLiteral", "#filePath",
"#function", "#if", "#imageLiteral", "#line", "#selector",
"#sourceLocation", "#warning",
NULL
};
static const char *js_kw[] = {
"break", "case", "catch", "continue", "debugger", "default",
"delete", "do", "else", "finally", "for", "if", "in", "new",
"return", "switch", "throw", "try", "void", "while", "width",
NULL
};
static const char *js_other[] = {
"function", "instanceof", "this", "typeof", "var",
NULL
};
static const char *sh_kw[] = {
"if", "fi", "while", "do", "exit", "return",
"shift", "case", "esac", "echo", "print", "set",
"then", "for", "while", "in", "done", "else", NULL
};
static const char *go_kw[] = {
"break", "default", "func", "interface", "select",
"case", "defer", "go", "map", "struct", "chan",
"else", "goto", "package", "switch", "const",
"fallthrough", "if", "range", "type", "continue",
"for", "import", "return", "var", NULL
};
/* I really should add macro support to my editor.... */
static const char *zig_kw[] = {
"addrspace", "align", "and", "asm", "async",
"await", "break", "catch", "comptime", "const",
"continue", "defer", "else", "enum", "errdefer",
"error", "export", "extern", "for", "if", "inline",
"noalias", "noinline", "nosuspend", "opaque", "or",
"orelse", "packed", "anyframe", "pub", "resume", "return",
"linksection", "callconv", "struct", "suspend", "switch",
"test", "threadlocal", "try", "union", "unreachable", "usingnamespace",
"var", "volatile", "allowzero", "while", "anytype", "fn",
NULL
};
enum {
SYNTAX_COLOR_BLACK = 0,
SYNTAX_COLOR_RED,
SYNTAX_COLOR_GREEN,
SYNTAX_COLOR_YELLOW,
SYNTAX_COLOR_BLUE,
SYNTAX_COLOR_MAGENTA,
SYNTAX_COLOR_CYAN,
SYNTAX_COLOR_WHITE,
SYNTAX_COLOR_TEAL,
SYNTAX_COLOR_COMMENT
};
static struct {
int r;
int g;
int b;
} rgb[] = {
{ 128, 128, 128 },
{ 192, 0, 0 },
{ 0, 255, 0 },
{ 255, 255, 51 },
{ 0, 0, 255 },
{ 255, 0, 255 },
{ 0, 255, 255 },
{ 255, 255, 255 },
{ 52, 139, 115 },
{ 32, 128, 128 },
};
static struct state syntax_state = { 0 };
void
ce_syntax_init(void)
{
memset(&syntax_state, 0, sizeof(syntax_state));
syntax_state.color = -1;
syntax_state.r = -1;
syntax_state.g = -1;
syntax_state.b = -1;
ce_term_attr_off();
}
void
ce_syntax_finalize(void)
{
syntax_state_term_reset(&syntax_state);
}
void
ce_syntax_write(struct cebuf *buf, struct celine *line, size_t index,
size_t towrite)
{
const u_int8_t *p;
size_t spaces, i, tw;
const char *tabstart, *tabpos;
p = line->data;
tw = config.tab_width;
syntax_state.col = 1;
syntax_state.off = 0;
syntax_state.buf = buf;
syntax_state.index = index;
syntax_state.keepcolor = 0;
syntax_state.diffcolor = -1;
syntax_state.avail = towrite;
if (syntax_state.flags & SYNTAX_CLEAR_COMMENT) {
syntax_state.flags &= ~SYNTAX_CLEAR_COMMENT;
syntax_state.inside_comment = 0;
syntax_state_term_reset(&syntax_state);
syntax_state.color = -1;
syntax_state.r = -1;
syntax_state.g = -1;
syntax_state.b = -1;
}
if (towrite == 1 && p[0] == '\n') {
syntax_state.ppwlen = 0;
syntax_state.ppword = NULL;
syntax_state.inside_preproc = 0;
if (syntax_state.inside_string == 0)
syntax_state_color_clear(&syntax_state);
return;
}
while (syntax_state.off != towrite) {
switch (p[syntax_state.off]) {
case '\t':
if (config.tab_show) {
tabpos = "\xc2\xb7";
tabstart = ">";
syntax_state_term_bold(&syntax_state, 0);
syntax_state_foreground_color(&syntax_state,
64, 64, 64);
} else {
tabpos = " ";
tabstart = " ";
}
if ((syntax_state.col % tw) == 0)
spaces = 1;
else
spaces = tw - (syntax_state.col % tw) + 1;
syntax_state.col += spaces;
syntax_term_write(&syntax_state, tabstart, 1, 0);
for (i = 1; i < spaces; i++)
syntax_term_write(&syntax_state, tabpos, 2, 0);
syntax_state.off++;
if (syntax_state.inside_comment) {
syntax_state_color(&syntax_state,
SYNTAX_COLOR_BLACK);
}
break;
case '\f':
case '\n':
syntax_state.off++;
break;
default:
syntax_state.p = &p[syntax_state.off];
syntax_state.len = towrite - syntax_state.off;
switch (buf->type) {
case CE_FILE_TYPE_C:
syntax_highlight_c(&syntax_state);
break;
case CE_FILE_TYPE_PYTHON:
syntax_highlight_python(&syntax_state);
break;
case CE_FILE_TYPE_DIFF:
syntax_highlight_diff(&syntax_state);
break;
case CE_FILE_TYPE_JS:
syntax_highlight_js(&syntax_state);
break;
case CE_FILE_TYPE_SHELL:
syntax_highlight_shell(&syntax_state);
break;
case CE_FILE_TYPE_SWIFT:
syntax_highlight_swift(&syntax_state);
break;
case CE_FILE_TYPE_YAML:
syntax_highlight_yaml(&syntax_state);
break;
case CE_FILE_TYPE_DIRLIST:
syntax_highlight_dirlist(&syntax_state);
break;
case CE_FILE_TYPE_GO:
syntax_highlight_go(&syntax_state);
break;
case CE_FILE_TYPE_LATEX:
syntax_highlight_latex(&syntax_state);
break;
case CE_FILE_TYPE_LUA:
syntax_highlight_lua(&syntax_state);
break;
case CE_FILE_TYPE_ZIG:
syntax_highlight_zig(&syntax_state);
break;
default:
syntax_state_color_clear(&syntax_state);
syntax_write(&syntax_state, 1);
break;
}
break;
}
}
}
void
ce_syntax_guess(struct cebuf *buf)
{
size_t idx;
const char *ptr;
struct celine *line;
for (idx = 0; idx < buf->lcnt; idx++) {
line = &buf->lines[idx];
ptr = (const char *)line->data;
if (line->length <= 1)
continue;
if (line->length >= 4 && ptr[3] == ' ' &&
(!strncmp(ptr, "+++", 3) || !strncmp(ptr, "---", 3))) {
buf->type = CE_FILE_TYPE_DIFF;
break;
}
if (idx == 0 && line->length >= 10 &&
!strncasecmp(ptr, "<!DOCTYPE>", 10)) {
buf->type = CE_FILE_TYPE_HTML;
break;
}
}
}
static void
syntax_state_selection(struct state *state)
{
int prev, color, bold;
prev = state->selection;
state->selection = 0;
if (ce_editor_mode() != CE_EDITOR_MODE_SELECT)
goto out;
if (state->col == state->buf->column)
goto out;
if (state->buf->selstart.line == state->buf->selend.line &&
state->index == state->buf->selstart.line) {
if (state->col >= state->buf->selstart.col &&
state->col <= state->buf->selend.col)
state->selection = 1;
goto out;
}
if (state->index > state->buf->selstart.line &&
state->index < state->buf->selend.line) {
state->selection = 1;
goto out;
}
if (state->index == state->buf->selstart.line) {
if (state->col >= state->buf->selstart.col)
state->selection = 1;
goto out;
}
if (state->index == state->buf->selend.line) {
if (state->col <= state->buf->selend.col)
state->selection = 1;
goto out;
}
out:
if (prev != state->selection)
state->dirty = 1;
if (state->selection) {
syntax_state_term_highlight(state);
} else if (state->highlight) {
bold = state->bold;
color = state->color;
syntax_state_term_reset(state);
if (bold)
syntax_state_term_bold(state, 1);
if (color != -1)
syntax_state_color(state, color);
}
}
static void
syntax_state_term_reset(struct state *state)
{
if (state->dirty) {
ce_term_attr_off();
state->bold = 0;
state->dirty = 0;
state->color = -1;
state->r = -1;
state->g = -1;
state->b = -1;
state->highlight = 0;
if (state->selection) {
state->highlight = 1;
ce_term_writestr(TERM_SEQUENCE_ATTR_REVERSE);
}
}
}
static void
syntax_state_term_bold(struct state *state, int onoff)
{
int color;
color = state->color;
if (state->bold != onoff) {
if (state->bold) {
syntax_state_term_reset(state);
if (color != -1)
syntax_state_color(state, color);
} else {
state->dirty = 1;
ce_term_attr_bold();
}
state->bold = onoff;
}
}
static void
syntax_state_term_highlight(struct state *state)
{
if (state->highlight == 0) {
state->dirty = 1;
state->highlight = 1;
ce_term_writestr(TERM_SEQUENCE_ATTR_REVERSE);
}
}
static void
syntax_state_color(struct state *state, int color)
{
if (state->color == color)
return;
syntax_state_foreground_color(state,
rgb[color].r, rgb[color].g, rgb[color].b);
state->color = color;
}
static void
syntax_state_foreground_color(struct state *state, int r, int g, int b)
{
if (state->r == r && state->g == g && state->b == b)
return;
state->dirty = 1;
state->color = -1;
state->r = r;
state->g = g;
state->b = b;
ce_term_foreground_rgb(state->r, state->g, state->b);
if (state->selection && state->highlight == 0) {
state->highlight = 1;
ce_term_writestr(TERM_SEQUENCE_ATTR_REVERSE);
}
}
static void
syntax_state_color_clear(struct state *state)
{
int bold;
bold = state->bold;
syntax_state_term_reset(state);
syntax_state_term_bold(state, bold);
}
static void
syntax_highlight_format_string(struct state *state)
{
size_t idx;
syntax_state_color(state, SYNTAX_COLOR_BLACK);
syntax_state_term_bold(state, 1);
syntax_write(state, 1);
for (idx = 1; idx < state->len; idx++) {
switch (state->p[idx]) {
case 'c':
case 'h':
case 'l':
case 'j':
case 't':
case 'z':
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
case 'n':
case 'p':
case 's':
case '*':
case '.':
syntax_term_write(state, &state->p[idx], 1, 1);
break;
default:
if (isdigit(state->p[idx])) {
syntax_term_write(state, &state->p[idx], 1, 1);
} else {
syntax_state_term_bold(state, 0);
return;
}
}
}
syntax_state_term_bold(state, 0);
}
static int
syntax_highlight_string(struct state *state)
{
if (state->p[0] != '"' && state->p[0] != '\'' && state->p[0] != '`') {
if (state->inside_string) {
switch (state->p[0]) {
case '%':
syntax_highlight_format_string(state);
break;
case '\\':
state->keepcolor = 1;
syntax_state_color(state, SYNTAX_COLOR_MAGENTA);
syntax_write(state, 1);
break;
default:
if (state->keepcolor == 0) {
syntax_state_color(state,
state->stringcolor);
} else {
state->keepcolor--;
}
syntax_write(state, 1);
break;
}
return (0);
}
return (-1);
}
if (state->inside_string == state->p[0] &&
syntax_escaped_quote(state) == -1) {
syntax_state_color(state, state->stringcolor);
syntax_write(state, 1);
state->inside_string = 0;
} else if (state->inside_string == 0) {
state->inside_string = state->p[0];
if (state->p[0] == '\'' && state->p[1] == '\\')
state->stringcolor = SYNTAX_COLOR_MAGENTA;
else
state->stringcolor = SYNTAX_COLOR_RED;
syntax_state_color(state, state->stringcolor);
syntax_write(state, 1);
} else {
syntax_write(state, 1);
}
return (0);
}
static int
syntax_highlight_numeric(struct state *state)
{
const u_int8_t *end, *p;
if (!isdigit(*state->p))
return (-1);
p = state->p;
end = state->p + state->len;
while ((isxdigit(*p) || *p == '.' || *p == 'x') && p < end)
p++;
if (syntax_is_word(state, p - state->p) == -1)
return (-1);
syntax_state_color(state, SYNTAX_COLOR_RED);
syntax_write(state, p - state->p);
return (0);
}
static void
syntax_highlight_c(struct state *state)
{
if (syntax_highlight_word(state, tags) == 0)
return;
if (syntax_highlight_c_comment(state) == 0)
return;
if (syntax_highlight_c_preproc(state) == 0)
return;
if (syntax_highlight_c_label(state) == 0)
return;
if (syntax_highlight_numeric(state) == 0)
return;
if (syntax_highlight_string(state) == 0)
return;
if (syntax_highlight_word(state, c_kw) == 0)
return;
if (syntax_highlight_word(state, c_type) == 0)
return;
if (syntax_highlight_word(state, c_special) == 0)
return;
if (state->p[0] == ' ' && state->p[1] == '\n') {
syntax_state_color(state, SYNTAX_COLOR_BLUE);
syntax_term_write(state, ".", 1, 1);
} else {
syntax_state_color_clear(state);
syntax_write(state, 1);
}
}
static int
syntax_highlight_c_comment(struct state *state)
{
if (state->inside_string)
return (-1);
if (state->inside_comment == 0) {
if (state->len >= 2 &&
state->p[0] == '/' && state->p[1] == '/') {
state->inside_comment = 1;
syntax_state_color(state, SYNTAX_COLOR_COMMENT);
syntax_write(state, 2);
state->flags |= SYNTAX_CLEAR_COMMENT;
return (0);
}
if (state->len >= 2 &&
state->p[0] == '/' && state->p[1] == '*') {
state->inside_comment = 1;
syntax_state_color(state, SYNTAX_COLOR_COMMENT);
syntax_write(state, 2);
return (0);
}
} else {
if (state->len >= 2 &&
state->p[0] == '*' && state->p[1] == '/') {
syntax_write(state, 2);
state->inside_comment = 0;
return (0);
}
syntax_state_color(state, SYNTAX_COLOR_COMMENT);
syntax_write(state, 1);
return (0);
}
return (-1);
}
static int
syntax_highlight_c_label(struct state *state)
{
if (state->off == 0 && state->len > 2 &&
state->p[state->len - 2] == ':') {
syntax_state_color(state, SYNTAX_COLOR_TEAL);
syntax_write(state, state->len - 2);
return (0);
}
return (-1);
}
static int
syntax_highlight_c_preproc(struct state *state)
{
const char *w;
const u_int8_t *p, *end;
if (state->inside_preproc) {
w = (const char *)state->ppword;
if (!strncmp(w, "#include", state->ppwlen)) {
if (state->p[0] == '<') {
syntax_highlight_span(state,
'<', '>', SYNTAX_COLOR_RED);
syntax_state.ppwlen = 0;
syntax_state.ppword = NULL;
syntax_state.inside_preproc = 0;
return (0);
}
}
if (state->p[0] == '"') {
syntax_highlight_span(state, '"', '"',
SYNTAX_COLOR_RED);
return (0);
}
if (syntax_highlight_numeric(state) == 0)
return (0);
if (syntax_highlight_word(state, c_kw) == 0)
return (0);
if (syntax_highlight_word(state, c_type) == 0)
return (0);
syntax_state_color(state, SYNTAX_COLOR_BLACK);
syntax_write(state, 1);
if (state->off == state->avail - 1) {
if (state->p[0] != '\\') {
syntax_state_color_clear(state);
state->inside_preproc = 0;
}
}
return (0);
}
if (state->off == 0 && state->p[0] == '#') {
state->inside_preproc = 1;
syntax_state_color(state, SYNTAX_COLOR_BLACK);
syntax_write(state, 1);
state->ppword = NULL;
state->ppwlen = 0;
p = state->p;
end = p + state->len;
while (!isspace(*p) && p < end)
p++;
state->ppword = state->p;
state->ppwlen = p - state->p;
return (0);
}
return (-1);
}
static void
syntax_highlight_python(struct state *state)
{
if (syntax_highlight_word(state, tags) == 0)
return;
if (syntax_highlight_pound_comment(state) == 0)
return;
if (syntax_highlight_python_multiline_string(state) == 0)
return;
if (syntax_highlight_python_decorator(state) == 0)
return;
if (syntax_highlight_numeric(state) == 0)
return;
if (syntax_highlight_string(state) == 0)
return;
if (syntax_highlight_word(state, py_kw) == 0)
return;
if (syntax_highlight_word(state, py_types) == 0)
return;
if (syntax_highlight_word(state, py_special) == 0)
return;
syntax_state_color_clear(state);
syntax_write(state, 1);
}
static int
syntax_highlight_python_decorator(struct state *state)
{
size_t idx;
if (state->off == 0 && state->p[0] == '@' &&
state->len > 1 && !isspace(state->p[1])) {
syntax_state_color(state, SYNTAX_COLOR_BLACK);
syntax_write(state, 1);
syntax_state_color(state, SYNTAX_COLOR_BLACK);
for (idx = 1; idx < state->len - 1; idx++) {
if (state->p[idx] == '(')
return (0);
syntax_term_write(state, &state->p[idx], 1, 1);
}
return (0);
}
return (-1);
}
static int
syntax_highlight_python_multiline_string(struct state *state)
{
int hit;
if (state->len >= 3 && state->p[0] == '"' &&
state->p[1] == '"' && state->p[2] == '"') {
hit = 1;
} else {
hit = 0;
}
if (state->inside_string == 0) {
if (hit) {
state->inside_string = 0xff;
syntax_state_color(state, SYNTAX_COLOR_RED);
syntax_write(state, 3);
return (0);
}
} else if (state->inside_string == 0xff) {
if (hit) {
state->inside_string = 0;
syntax_write(state, 3);
} else {
syntax_write(state, 1);
}
return (0);
}
return (-1);
}
static void
syntax_highlight_diff(struct state *state)
{
if (state->off > 0) {
if (state->diffcolor != -1)
syntax_state_color(state, state->diffcolor);
else
syntax_state_color_clear(state);
syntax_write(state, 1);
return;
}
if (state->p[0] == '+' && state->p[1] != '+') {
state->diffcolor = SYNTAX_COLOR_TEAL;
syntax_state_color(state, SYNTAX_COLOR_TEAL);
syntax_write(state, 1);
return;
} else if (state->len > 3 && state->p[1] == '+' && state->p[2] == '+') {
state->diffcolor = SYNTAX_COLOR_TEAL;