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StringStream & more stdlib modules support for JS/NimScript (#14095)

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* StringStream & more stdlib modules support for JS/NimScript

* change back pegs test in line with #14134
This commit is contained in:
hlaaftana 2020-04-28 20:44:52 +03:00 • committed by GitHub
commit cd9af6b804
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GPG key ID: 4AEE18F83AFDEB23
22 changed files with 852 additions and 356 deletions
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64
lib/pure/cstrutils.nim
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@ -19,29 +19,43 @@ proc toLowerAscii(c: char): char {.inline.} =
else:
result = c
proc startsWith*(s, prefix: cstring): bool {.noSideEffect,
rtl, extern: "csuStartsWith".} =
## Returns true iff ``s`` starts with ``prefix``.
##
## If ``prefix == ""`` true is returned.
var i = 0
while true:
if prefix[i] == '\0': return true
if s[i] != prefix[i]: return false
inc(i)
when defined(js):
proc startsWith*(s, prefix: cstring): bool {.noSideEffect,
importjs: "#.startsWith(#)".}
proc endsWith*(s, suffix: cstring): bool {.noSideEffect,
rtl, extern: "csuEndsWith".} =
## Returns true iff ``s`` ends with ``suffix``.
##
## If ``suffix == ""`` true is returned.
let slen = s.len
var i = 0
var j = slen - len(suffix)
while i+j <% slen:
if s[i+j] != suffix[i]: return false
inc(i)
if suffix[i] == '\0': return true
proc endsWith*(s, suffix: cstring): bool {.noSideEffect,
importjs: "#.endsWith(#)".}
# JS string has more operations that might warrant its own module:
# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String
else:
proc startsWith*(s, prefix: cstring): bool {.noSideEffect,
rtl, extern: "csuStartsWith".} =
## Returns true iff ``s`` starts with ``prefix``.
##
## If ``prefix == ""`` true is returned.
##
## JS backend uses native ``String.prototype.startsWith``.
var i = 0
while true:
if prefix[i] == '\0': return true
if s[i] != prefix[i]: return false
inc(i)
proc endsWith*(s, suffix: cstring): bool {.noSideEffect,
rtl, extern: "csuEndsWith".} =
## Returns true iff ``s`` ends with ``suffix``.
##
## If ``suffix == ""`` true is returned.
##
## JS backend uses native ``String.prototype.endsWith``.
let slen = s.len
var i = 0
var j = slen - len(suffix)
while i+j <% slen:
if s[i+j] != suffix[i]: return false
inc(i)
if suffix[i] == '\0': return true
proc cmpIgnoreStyle*(a, b: cstring): int {.noSideEffect,
rtl, extern: "csuCmpIgnoreStyle".} =
@ -53,6 +67,9 @@ proc cmpIgnoreStyle*(a, b: cstring): int {.noSideEffect,
## | 0 iff a == b
## | < 0 iff a < b
## | > 0 iff a > b
##
## Not supported for JS backend, use `strutils.cmpIgnoreStyle
## <https://nim-lang.org/docs/strutils.html#cmpIgnoreStyle%2Cstring%2Cstring>`_ instead.
var i = 0
var j = 0
while true:
@ -72,6 +89,9 @@ proc cmpIgnoreCase*(a, b: cstring): int {.noSideEffect,
## | 0 iff a == b
## | < 0 iff a < b
## | > 0 iff a > b
##
## Not supported for JS backend, use `strutils.cmpIgnoreCase
## <https://nim-lang.org/docs/strutils.html#cmpIgnoreCase%2Cstring%2Cstring>`_ instead.
var i = 0
while true:
var aa = toLowerAscii(a[i])