From c88b19a4dae57093c57ff17edc2117b2cb3bad8f Mon Sep 17 00:00:00 2001 From: sloumdrone Date: Fri, 27 Dec 2019 22:26:00 -0800 Subject: [PATCH] Initial commit --- Makefile | 2 + csedit | Bin 0 -> 13768 bytes csedit.c | 309 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 311 insertions(+) create mode 100644 Makefile create mode 100755 csedit create mode 100644 csedit.c diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..922d4ac --- /dev/null +++ b/Makefile @@ -0,0 +1,2 @@ +csedit: csedit.c + $(CC) csedit.c -o csedit -Wall -Wextra -pedantic -std=c99 diff --git a/csedit b/csedit new file mode 100755 index 0000000000000000000000000000000000000000..21523fded2a39e9a2250affc436ba441af277d2d GIT binary patch literal 13768 zcmeHOdvIITnLo0v#7P|4c{sRnAR;Af0$A8-NNh+NzZ9-Z0&ZgSNC-l<8E_tr!np`tIy?KO7lGaLO0o6vS0dHIP~**yB_Qm?tKIFOZlauQdpyMoKByObZpB4@!2`c?OV8=P5m=93fG=l1)TzoNJ&=g>XuM z>?qdi^Cb)Flo_V4sW@(=z+`gDJHce9DLYNsF&$HZG3EME-RNpjezR#KWR#eaE~Vx_ z=|0NeHAk}N(4z({n6llsVMlTPxv4}cu2bdZYM0|Gex|Cr;_|LQ+p?vXclj#10zHwf z60W(pt1O9{Rk@P#+29Ey`R~8Es{Y51-{ZP#)fZE5eb4dl zZzh-d$(Ao<|LpWH(40Ae_Uat?N#M>2^e@bz|40+O;de?XNhaMnX6iAX2)|&TvrHB zQ_EV9&mZz{4uo}osAX+KSFp$5;%)09pPRdbJ*s4np*o==nlDd2r*zN56KYU;atq9S z9%f)d=&}Jvmk6Fu&I<&l(+vHB!uI~{4=^nih!+(ryDIewHv2fEjZ8RBOqfSLL& zxN2f4+h@Vi!Df2If;&u9h#y(-Vheu2g7cUm@qh)NVbLG7;MRHKxCNhO(I2+p^p4@A zMc*&f;`Y;XoI=|@sOP1Jwdm2pBO-mpm4MOc!*3Q&%O0+gxO`rWvl&$qm&zEH7%ZMyp zdN*uN70+)Z$;v0dv}%3!M?tlklotDw{xx*P24c|_(>J9@I$Xu`cS--7j!-X*^RN$) zV&4^Q(#_(tu-6Wq&DUaM+M&cM&2~(C<*Z%?hZib`MdUD-znv==Lrp|3*P<&wosC>8 z#Z#okSAGUAF&!* z37EsvVl`f>f>k)WAb%Rg)hEZMJo>&j97r7yvSq(9IL3I0A zI#QPS;PZ4kE~2Sv7&3h;U&dpaIE8jWp&uH389QdQ)>62OxyN8;iySF_#{J=n^5Wh9 zNG;pvKAovL1*%#!Wz#1QltW>3JE>^VL0hKUJ1E+!c0IhFUa>J!3woyb`N3$aUZ0QK zj>*wfo$eT26iqegrO{NQe%|Q3fs+`EqhB8wB{FXyNu+cjLBwH{I+=om8!f(;+NDSi z1GLLkDAsJ3W(@WLEfzVD)jmV+mk_z&q52CKpBR?5NExKX&otVHSFF>Eqwbe%(d{o?aL4h{g8orkKV-)s z5(s{HMR}wU^pzDG(UMf!Xtfq^J%ElL(E8R6Ykk}DwAd>c8yMCXAb020jui0W)SWiCD>mL4OZU&7dne z=veC;_0ChZ6Uu@GP?Q=uSxYWHsxMdoOiV z@-obo@#!auo#Np2t*x!GJ=c=uDXRo#!^WwZ|OTg-mn26?`j z;MkDS8QW1@%)Kve?}win_rC8=iQ9K0E3vzfxzxQccKFcA`L^L#QZe^~(d`ckeHr52 zV~ozeE9Q`E1il|#677D_Hd+nBu%_u9TDz6jG-yTLdu?(1kDy5{ zbMG$!^}}PvgxB_|Wq8zPHM%zB9)w#lzK$-Gi#( zF5!YzKo6^eX9ADAj~l}k%EydnYlGnrz))ffRL*ILo1kEfz}WUL;_fe^sjlK(`wPRyV!X8)qdDMmNM?WaJoAX*={pF|FQ9J9YoqWZY~cZTSy zxcyfwI!vNV;`W1}@zOzprRTYE`{Trr=Z8pVO8@BOeq*{Ef7KUqUCZ_IXsY}!X9d+D zn#$iY2Tg#cdLLakI&H|l9xf>Ln@{QcC2ZTZV+LAgyNg<8aWoasD@U)4rf%1P-hNl5 z>G9&xBID_+z>piod`|xFCI3Z3_D`l^nFar&!cu^t9+VHO(Iqn?(+n_)-s+Fr2VsWi zs>pEGPP6?~BVUfZay4ZCd#F(wvfpp!Vk(ERd=IjCkM96UTwu)8a&5F85hcp0Bx7x4 z6#XgyBlj@MFmlh~H9mT>?uNSSn_|DOYpuiDc;Ty)<nNLFLFbm#~0kPp0-1Ttvvs#L3GY}xORP_U7+`X?g#xl^vO}sA7f~}2YLWwrT{adA8)0LKtBL& z1f7Q7^?~lfa%LB3ANp-SXaqCDQP8JA-vgbAVOfADVH4;@pg#m{1U&)j18qbv{{*xJ z^eE_T#7N0@=Q?5AT4F0Nnq1g#n_NQpJY2)5*QKPO(!}~gTm(7k_kNU4J5dkeC|T_& z`&RL^ErmP9s<~HP@{NlYkPEVJ#MKGESbdtQ47rq}0fKP4T?nO<(?$l)6wqW19QkG!If@ z`RTLiAo2Uu!-%gEnMMi>O7lLY0VSVmu;OwR;55b4yMdAl%V2QFt4*eAwV%q*{61wr zTghqTk`lecDK#sA@qQHu$2};u1b#m@5|=OMZa}Pu=|t8K#YqUSU&+@he|Y_}Tsj(4 ze2J1{x|VXThbr#>jPUQj*$(HZie0SeGDTM_dcC3@ir%5<-HQG|(H|=MjH1UBeO1x_ zQ1pzVlT-)K;f~G@>??Tw-Q?!=b$`=mv{6(gIvEcb56E6|(XFtGD z$QLur^8=asGes>wuogkSm}UO{W`W^nwmA=F;-xqj;j}_BpD*SJo;R$*e3~Vk6X}-$ zo(Shza@-3|KLz3=eA#3sns4*aZntK&C#^{ce&;KEH>R{zpn*enY@!SmMgqLg*WJriC}NsP9Dh9Em%`Ln==B{Rg9Rg|iX2 z|K&OS)GPhVij5L~t_p5ec(GdG$ZtT%Zc+GOsR1az{ebu8@c-92@JE4D`{RLBB^u;O z<-bBLM7&B$zx!lr8iHQ~pOJT-;P;$T7q3e{%#G6zNFOEhysDN};tQ$o5CQt|LE?2w zJ{B4@&fiw;v&RsNB84}r@h`u@Ae*P~zfpeVw<+*TfzQDFQ>*IRto$4XEdk!2)eaTP z&wZ*Li6t=eF)rXsXu3@prfh2e^Bk&qy)2pFJL7Log>Sg z;Jx1-(!+YBqr=rM#t-Fq^lnc(9m}C3N4}tEb62p<+vV};!BE)ajcgU|!S3EJzwY6+g@c|>$Z(d-IO{g<3ZrzU zIksS6Jq|eTis~g?;ceZzw+&Pe8MKpgI2-5>^$J%{Q1`p)>YFNb?`Fkq?uoeCA^{x3 z4fuqMxK3}lQ@DKFdf?BXIHV{gYO6kj@jw>xcX`P`<$Akx;gbF2Le{l82o{GCai@6) zN5r8LK^i$1=T$6&204Zv>7l@F17J zPi2^L{JhV@`y}l4T4d$mM6(f0wea zS9-jU#gzBG$ezx7X4~HfjM_wPKbiXgydRMLxt-nru`GLYzd-F9II|jDEgP|BGt%BH zd)`-I%JC|7Gk(VZDa)SMjZB|Z>o&IMa+!ZD%bxcsm}YN(WY_-*WzYS`>u#p^b3uw` z+tc9>Y9hAJ{{O_$udt_6TUPs8)nQD_=;5#=Za0QrM8<)O)%d%a|5uT%&pgxL!InN9 z*uGZntJIzk5Q+5+Zk%WQZ3t-Wu|0p!^Z!=(|0z5^*^c{>_9dwPY|r~Q)$;)&9XE)1 zXM3h6A+g$<-)m08gv((EY{&c +#include +#include +#include +#include +#include +#include +#include + +// +// definitions +// ----------- +#define CSEDIT_VERSION "0.0.1" +#define CTRL_KEY(k) ((k) & 0x1f) + +enum editorMode {CommandMode, InputMode, VisualMode}; +enum editorKey { + ARROW_LEFT = 1000, + ARROW_RIGHT, + ARROW_UP, + ARROW_DOWN, + PAGE_UP, + PAGE_DOWN, + DELETE, + BACKSPACE +}; + +// +// data +// ---- + +struct editorConfig { + struct termios orig_termios; + enum editorMode mode; + int cx, cy; + int screenRows; + int screenCols; +}; + +struct editorConfig E; + +// +// terminal +// -------- +void die(const char *s) { + write(STDOUT_FILENO, "\033[2J", 4); + write(STDOUT_FILENO, "\033[H", 3); + perror(s); + write(STDOUT_FILENO, "\r", 1); + exit(1); +} + +void quit() { + write(STDOUT_FILENO, "\033[2J", 4); + write(STDOUT_FILENO, "\033[H", 3); + exit(0); +} + +void disableRawMode() { + if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &E.orig_termios) == -1) + die("tcsetattr"); +} + +void enableRawMode() { + if (tcgetattr(STDIN_FILENO, &E.orig_termios) == -1) die("tcgetattr"); + atexit(disableRawMode); + + struct termios raw = E.orig_termios; + raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); + raw.c_oflag &= ~(OPOST); + raw.c_cflag |= ~(CS8); + raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG); + raw.c_cc[VMIN] = 0; + raw.c_cc[VTIME] = 1; + + if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) die("tcsetattr"); +} + +int editorReadKey() { + int nread; + char c; + while ((nread = read(STDIN_FILENO, &c, 1)) != 1) { + if (nread == -1 && errno != EAGAIN) die("read"); + } + + if (c == '\033') { + char seq[3]; + + if (read(STDIN_FILENO, &seq[0], 1) != 1) return '\033'; + if (read(STDIN_FILENO, &seq[1], 1) != 1) return '\033'; + if (seq[0] == '[') { + switch (seq[1]) { + case 'A': return ARROW_UP; + case 'B': return ARROW_DOWN; + case 'C': return ARROW_RIGHT; + case 'D': return ARROW_LEFT; + } + } + return '\033'; + } + return c; +} + +int getCursorPosition(int *rows, int *cols) { + char buf[32]; + unsigned int i = 0; + + if (write(STDOUT_FILENO, "\033[6n", 4) != 4) return -1; + printf("\r\n"); + + while (i < sizeof(buf) - 1) { + if (read(STDIN_FILENO, &buf[i], 1) != 1) break; + if (buf[i] == 'R') break; + i++; + } + buf[i] = '\0'; + if (buf[0] != '\033' || buf[1] != '[') return -1; + if (scanf(&buf[2], "%d;%d", rows, cols) != 2) return -1; + return 0; +} + +int getWindowSize(int *rows, int *cols) { + struct winsize ws; + + if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) { + if (write(STDOUT_FILENO, "\033[999C\033[999B", 12) != 12) return -1; + return getCursorPosition(rows, cols); + } + + *cols = ws.ws_col; + *rows = ws.ws_row; + return 0; +} + +// +// append buffer +// ------------- +struct abuf { + char *b; + int len; +}; + +#define ABUF_INIT {NULL, 0} + +void abAppend(struct abuf *ab, const char *s, int len) { + char *new = realloc(ab->b, ab->len + len); + + if (new == NULL) return; + memcpy(&new[ab->len], s, len); + ab->b = new; + ab->len += len; +} + +void abFree(struct abuf *ab) { + free(ab->b); +} + +// +// output +// ------ +void editorDrawRows(struct abuf *ab) { + int y; + for (y = 0; y < E.screenRows; y++) { + if (y == E.screenRows / 3) { + char welcome[80]; + int welcomelen = snprintf(welcome, sizeof(welcome), "[ cs edit ] - version %s", CSEDIT_VERSION); + if (welcomelen > E.screenCols) welcomelen = E.screenCols; + int padding = (E.screenCols - welcomelen) / 2; + if (padding) { + abAppend(ab, "~", 1); + padding--; + } + while (padding--) abAppend(ab, " ", 1); + abAppend(ab, welcome, welcomelen); + } else { + abAppend(ab, "~", 1); + } + + abAppend(ab, "\033[K", 3); + + if (y < E.screenRows - 1) { + abAppend(ab, "\r\n", 2); + } + } +} + +void editorRefreshScreen() { + struct abuf ab = ABUF_INIT; + + abAppend(&ab, "\033[?25l", 6); + abAppend(&ab, "\033[H", 3); + editorDrawRows(&ab); + + char buf[32]; + snprintf(buf, sizeof(buf), "\033[%d;%dH", E.cy + 1, E.cx + 1); + abAppend(&ab, buf, strlen(buf)); + + abAppend(&ab, "\033[?25h", 6); + + write(STDOUT_FILENO, ab.b, ab.len); + abFree(&ab); +} + +// +// input +// ----- +void editorMoveCursor(int key) { + switch (key) { + case 'j': + case ARROW_DOWN: + if (E.cy != E.screenRows - 1) { + E.cy++; + } + break; + case 'k': + case ARROW_UP: + if (E.cy != 0) { + E.cy--; + } + break; + case 'h': + case ARROW_LEFT: + if (E.cx != 0) { + E.cx--; + } + break; + case 'l': + case ARROW_RIGHT: + if (E.cx != E.screenCols - 1) { + E.cx++; + } + break; + } +} + +void editorInputKp(int c) { + switch (c) { + case ARROW_DOWN: + case ARROW_UP: + case ARROW_LEFT: + case ARROW_RIGHT: + editorMoveCursor(c); + break; + case '\033': + E.mode = CommandMode; + default: + break; + } +} + +void editorCommandKp(int c) { + switch (c) { + case 'q': + quit(); + break; + case 'j': + case 'k': + case 'h': + case 'l': + case ARROW_DOWN: + case ARROW_UP: + case ARROW_LEFT: + case ARROW_RIGHT: + editorMoveCursor(c); + break; + case 'i': + E.mode = InputMode; + } + +} + +void editorProcessKeypress() { + int c = editorReadKey(); + switch (c) { + case CTRL_KEY('q'): + quit(); + break; + } + + if (E.mode == CommandMode) { + editorCommandKp(c); + } else { + editorInputKp(c); + } +} + +// +// init +// ---- +void initEditor() { + E.mode = CommandMode; + E.cx = 0; + E.cy = 0; + if (getWindowSize(&E.screenRows, &E.screenCols) == -1) die("getWindowSize"); +} + +int main() { + enableRawMode(); + initEditor(); + + while (1) { + editorRefreshScreen(); + editorProcessKeypress(); + } + return 0; +}